Tonight sky is an application that let you know what Deep Space Objects (DSO's) will transit your meridian at what time and what elevation.
The calculated values are close to be accurate. However, since the premise of this app is to let the user know what objects are available over a given time span, accuracy of the calculations are not that important.
Version 1.1.4 (2/17/11) added the following features:
Version 1.2.0 (2/26/11)
Version 1.2.4 (3/4/11)
Version 1.3.2 (3/24/11)
Version 1.3.5 (3/29/11)
Version 1.3.6 (4/12/11)
Version 2.1.0 ( 7/1/11)
Version 2.1.1 ( 7/5/11)
Version 2.1.4 (7/18/11)
Version 2.1.5 (7/21/11)
Version 2.1.6 (7/22/11)
Version 2.1.7 (8/10/11)
Version 2.1.8 (9/14/11)
Version 2.1.9 (9/14/11)
Version 2.1.10 (9/16/11)
Version 2.1.11 ( 12/15/11
Version 2.2.0 ( 12/21/11)
Version 2.2.1 ( 12/26/11)
Added search capabilities by SAO, HD and FK5 id in the star table.
Version 2.2.2 ( 1/11/12)
Added EPOCH calculation to detail screen.
Version 2.2.3 (5/4/12)
Added the capability for the ASCOM mount to slew to specific coordinates.
Version 2.2.4 (5/6/12)
Added the ability to get information on objects that surround the given coordinates to the GO TO Coordinates form.
Added option to get surrounding objects from LOCAL DB
Added option to get image of sky around the coordinates from SKYMap.com
Version 2.2.5 (6/7/12)
Corrected error in routine that converts Decimal Degreed to the string dd:mm:ss as well as the one converting DD:MM:SS to degrees. the routine was not captureing the negative value for DEC value less the 1.
Version 2.2.6 (6/9/12)
Corrected bug where CLASS type dropdown box was not populating
Version 2.2.7 (6/9/12)
Fixed the double loading of Constellation dropdown.
Version 2.2.8 (6/9/16)
Added AstroArt report
Moved reports to own tab
Version 2.2.9 (7/14/12)
Shrunk main form to fit 800x600 format
Version 2.2.10 (8/14/12)
Fixed end date format on request form to conform to the locale setting of the system.
Added Link To NED web site also moved WIKISky and SIMBAD link to the report menu
Made some cosmetic changes to main page.
Version 2.2.14 ( 2/28/13)
Changed default request start and end time to show Astronomical Twilight instead of local sun rise +- 2hours
Version 2.2.15 ( 3/15/13)
Corrected Observation report format.
Version 2.2.16 (8/1/13)
Corrected “best viewed time” on result page
Version 2.2.17 (11/1/13)
Removed the need for wininet.dll. It is causing problems in windows 8.1 . The application will no longer check if an internet connection is available but rather will let the browser inform the user.
Version 2.2.18 (11/7/13)
Fixed special key search so
it recognizes the search time.
Added a dropdown list of Key values in DB
Version 2.2.20 (07/24/14)
Added feature to allow the user to enter the name of an object in the request box without first selecting the type of item (I.e.: NGC ,HD, SH2, etc.). Also when the user presses the ENTER KEY after entering the object name the program will execute the search automatically. No need to click on the GO button. There is also no need to first chose the star table if looking for a star. Simply type the star name (SAO 1234 or HD 1234) and press enter.
Added the Query string for the search to the message that informs you that the object is not in the DB. In this way you can see what the program was looking for.
Version 2.2.21 (8/14/14)
Streamlined some of the code
Added tool to provide a star list for a 2 star alignment stars. The list can be saved to a file .
Version 2.2.22 (8/20/14)
Added sort to Alignment star list display.
Added interface to ASCOM telescope so you can slew to the desired star.
Version 2.2.23 (8/21/14)
Fixed Minor Bug dealing with Constellation names
Version 2.2.24 (8/27/14)
Fixed bug when selecting stars for southern hemisphere
Version 2.2.25 (9/9/14)
Cosmetic changes in the Alignment star form: Telescope icon will be disabled if user click on a cell that does not contain a STAR Name
Version 2.2.26 (9/25/14)
Repaired a bug in main search if user specifies a name of an object.
Added a feature to the DETAIL form that allows you to see where the object is in the sky given the date and time.
Version 2.2.27 (11/3/2014)
Added location weather info to main page
The location Latitude , longitude , Time zone offset and check the Daylight Savings time box if appropriate will be retrieved from the INI file from the alt0 key.
If this is a new installation or the INI file does not exist the program
will load some data into these fields to satisfy some of the logic with in. It
is up to the user to change that data for his/her location. The changes
can be made on this screen and pressing the SAVE button or open the location edit tool and make the
changes there. If you use the edit tool you must double click on
the location name to load that data into the main program.
The get new version button will only appear if a new version is on the server. Clicking the button will take you to the web site to down load the latest.
Menu bar was added and the HELP and ABOUT buttons were removed from the form and placed in the menu
A save button has been added to the screen. after you make changes to the location data on this screen you must click the save button for it to be stored in the INI file.
If you are connected to the internet the program will retrieve the weather information for the location specified by the Latitude and longitude. If you select an alternate location the weather information will also change accordingly.
The next step is entering the time span you are interested in. You may enter any valid date/time format.
The program uses the set time as the start of the time span and midnight as the end as a default values.
The Start time is also used to calculate the sun, moon and twilight information which will change when you alter the start time value. This change was made to give you a better idea as to what's going on around the date/time you plan on doing you observation. The previous version used the current system time to calculate those values.
Next make a selection as to the type of objects your interested
in. Here you have a choice of ALL objects in the DB, Messier, NGC, IC,
you may also select a object type from the dropdown list. For instance you can select Messier and class Galaxies and you will get all the messier object that are galaxies which will transit during the time window that you specified. If you are interested in all the Galaxies, click ALL and select galaxies from the list.
New for version 2.2.20: In this version a feature was added that allows you to enter the entire name (NGC 1234 , HD 1234, etc.) into the SELECT OBJECT BOX and press the ENTER KEY on the keyboard to have the program do the search.. There is no need to first select the object type and the type in the number when interested in only one object.
If you have the star table loaded you will see some additional
You can check the box to use the STAR TABLE for the lookup. If you check this box you will also see a drop-down box appear that will allow you to choose a constellation.
If you choose a constellation the search will be limited to those stars that are in that constellation.
I would suggest that you select a minimum Magnitude when requesting ALL or NGC since the result could be quite large.
You may also filter out from the report objects that fall below the minimum transit elevation you specify. Only objects above the minimum elevation will be pulled fro the DB and displayed.
If you are interested in just one object and wish to get
it's times, you can select the OBJECT TYPE ( Messier, NGC, IC etc.) and
then enter the OBJECT NUMBER in the box provided.
You may also enter part of an object's name, for instance if you enter AN* you will get all the objects who's name starts with AN.
When you click GO the data will be displayed. This information is also available in the REPORT option.
You now also have the option of looking for just a single star by
selecting either SAO, HA or FK4 and entering the appropriate number
into the box. You may also search for a star using its IDENTITY
(epsilon, tau, etc.) .
To do so check IDENTITY and enter the name or part of the name and select the appropriate constellation, as shown above.
You may also filter the selection by specifying a star type (i.e.: A0, M2, etc). Te Asterisk can also be used a wild card allowing you to, for instance select all the type A stars by entering A* on the form.
You can further restrict the search to a specific section of the sky by entering the RA & DEC of the center of the circle you want to search and giving the radius in Arc Minutes.
A new feature is marking objects with some key.
When you get ready to search for objects previously marked enter the KEY in the box provided and click GO or you may enter the KEY with imbedded asterisks (*). The asterisk is a wild card character that will cause the search to ignore the character that falls in the asterisk's position.
As an example you may have marked some items with the key ABC111 and others with ABC222.
If you enter ABC* all records that have ABC as the first 3 characters will be extracted.
If you enter *2 all records whose key ends in 2 will be extracted
If you enter *b* all the records with keys that have a B the will be matched.
All the items that match the entry will be pulled from the database.
A new feature has been added that allows you to enter a KEY and have those records who's key matches be EXCLUDED from result. This could be useful if you want to see a list of objects that have not yet been images. For instance you could mark all the items you have images of with the key DONE . By entering DONE in the key and checking the exclusion box, only the objects that are yet to be imaged will be displayed.
Feature added that allows you to make a query using the object name or part of it. For instance you can enter CRAB in the box provided and the program will display the information for the CRAB nebula (M1) . If you enter *star* then the results will be for any object that has STAR in the name. The asterisk is a wild card character.
You now have the ability to sort the result. The
default sort is using the RA value sorted in ascending order.
You can also sort by:
You can also specify Ascending or Descending sort order.
If you want to see all the details of the object you can click the detail button and another form will pop up that gives you all that information ( see sample below)
The "Go to web " Button will take you to the http://njstargazer.org web site
The final section deals with your results. The results will be shown in a separate form. The the information in the database pertaining to your request will be shown in the data grid.
Object viewing information has been added above the grid. This information pertains to the selected object. The viewing times are calculated 1 Hour after sunset and 1 hour before sunrise for the time the object is above the minimum elevation specified.
New for version 2.2.0 -- The SINBAD button has been moved from the detail form t the main result form.
Below the grid I have added the current location ( AZ/EL) of the selected object.
If you have select to view star data, the above is shows. As you
can see the columns are a bit different and reflect the information pertaining
to stars. All the other data on the form is the same as for DSO's.
These are stars in the Orion constellation that match certain criteria such as minimum magnitude, and minimum transit elevation.
The calculated values for each selection in the grid are shown below
the data grid.
Note that if the Transit elevation is below the one specified the background of that field will turn RED .
The Angular separation between the moon and the selected object is displayed. This information might be useful if you plan on bypass imaging objects that might be too close to the moon.
You can use the navigation controls at the right to move up and down in the list or you can select the row in the grid of the object of interest. You can scroll up and down the list by using the arrow key on your keyboard.
The columns of the grid are fully adjustable allowing you to make them wider or you can shrink them. you can also alter the height of the rows.
The observation time is now calculated . This is the time that the object is above the minimum elevation angle. Your actual observation time will vary with what obstructions are in your field of view. Circumpolar objects are marked as always visible.
This section also has the box that allows you to mark an object with a KEY. To do so;
All the screens will be updated automatically if left open and a new selection is made.
Click the DETAIL button to get more information about the object.
You can ADD, CHANGE or DELETE items in the Database by simply
changing them in the DATA GRID. Once you move to another items or
close the form the data will be written into the database.
When you add items be sure that you follow the same format for the elements as you see them in the grid. I've made it a easier to enter the RA and DE data. For instance, if you have the RA data in HOURS ( 13.02010) enter that value into the RA box of the grid for the new item and the program will convert it to HH:MM:SS and populate the matching item in the record. The inverse is also true. enter HH:MM:SS in the RAhms field of the record and the program will calculate the HOUR value and populate the RA item. It works the same for the DEC values.
New for version 2.1.8 is the capability for the user to store and retrieve up10 alternated location. The information similar to that which is shown on the main page is stored in the INI file for future retreival.
This form is access by clicking on TOOLS and Alternate Location on the menu bar.
The first entry in the list is your default Home location data. The last entry in the list is the Telescope location data you saved from the ASCOM. If you don't have an ASCOM mount you can enter any data you wish in this location. However, if you do have an ASCOM mount and click the save location button it will overwrite what's there.
When entering the UT offset value you can enter the just number . The program will reformat the data so it can be understood by the main form.
IF you want to DELETE and entry simply clear out the location name field ( Select the name and press DELETE on your keyboard).
To select a location, simply, double click on the location name. The program will write the new information into the location fields in the main form and recalculate the times for the new location. After changing the location you will have to requery the data base so the result form shows the proper times.
If you feel that you want to see the information in another format, this screen displays everything that's on the main page and in the data grid.
Make your selection of the object on the main page and this form will update automatically.
One field was added called "Time to
IF you have a star selected, the Star Classification button will
appear and allow you to access the WIKI web site that describes the
various stellar classification
If you are interested in finding the actual RA and DEC of the displayed object in another year simply enter the FROM Epoch ( all the items in the DB are EPOCH 2000) and the century you are interested in and click RECALCULATE. The results will be shown. The default values for the EPOCH are 2000 and the EPOCH NOW which is calculated from the current date and time and expressed in Modified Julian Day.
New version 2.2.26 -- Added the ability to see where an object is given the data and time. Simply put the DATE and TIME in the REQUEST TIME box and the current Azimuth and Elevation of the object will be displayed . if the Elevation is below the horizon then the back ground of the Elevation box will be red.
Click CLOSE to hide the form.
The SINBAD data Button to allow the user to access object data in the SINBAD database. Must be on line for this to be enabled.
Example of SINBAD data click here
This feature was added in 2.1.4 and allows the user to manage the GMT offset data in the database. The user may add, delete or modify the GMT data simply by scrolling down to the desired record and retyping the data or deleting the record. To add a new record go to the bottom of the list and type the information into the blank record.
Checks are done on the offset value. An offset less than -12 or greater then 12 is not allowed.
You may also filter the Country names by entering the beginning characters of the name in the text box and clicking GO. To get the entire list again, clear the text box and click GO.
When done just close the form.
The telescope interface is designed to allow the user to select an
object from the DB and then SLEW the telescope to it. This interface should be
able to communicate with any ASCOM compliant telescope mount. The
software behind this function is modeled after the software that drives
EQTOUR and is used with permission from
This feature is invoked by clicking on the Telescope Icon
on the result page after selecting an object in the data grid.
Note: this Icon is only visible if you have ASCOM installed on your computer.
When you invoke this function you will be presented with a screen similar to the image on the left.
A " Save Telescope Location Data" button has been added that will be active when connected to and ASCOM mount. Clicking this button will read the Latitude and Longitude from the mount and store it in the INI file. This can be helpful if you are at a site other than you home base and want to quickly load the present location data into the main form.
If you desire a printable list of the results you can click on
the BUILD REPORT button and that data will be written into a .TXT
file in the folder "My Documents".
Then report file path will be displayed in the list , Clicking on the report name will open the report for you to view..
The file name is constructed as follows:
TonightSkyddd-ttt.txt Where ddd= the day of the year, ttt= type ( m,ngc,ic,etc) . When you run the report it will over write the file if it already exists.
For those of you that use the EQMOD package to control you mount you can get the list printed in the EQTOUR format which can be imported directly into EQTour. The file will be named Tsky_ddd-ttt.lst (Where ddd= the day of the year, ttt= type ( m,ngc,ic,etc) .)
This version will place the .LST file in the EQTOUR folder if It exists otherwise it will be placed in the "My Documents" folder.
An observation report is now available that tells you how long the object will be visible for viewing or imaging. You get the total time that the object is above the minimum elevation angle specified. It also tells you how long it will be east and west of the meridian to help you plan your session.
The normal and observation report will now have the LOCATION NAME in the header just be fore the Latitude values
The following is a sample of the normal report output:
Viewing Tonight Sky
2/27/2011 1:19:25 PM
Time window 2/27/2011 17:45 to 2/28/2011 00:00:01 for Location Home_location 40:50:25 N Latitude 74:54:52 W Longitude.
Sun rise: 06:36:59 Sun set: 17:48:26 Moon Rise: 03:27:48 Moon set: 12:59:34 Third Quarter
Minimum Elevation: 0
IC (Nebula) Objects
IC NGC Rise TM Rise AZ Tansit TM TansitEL Set TM Set AZ RA dec Size Mag Obs. Time Lunar Sep. Name
5384 7813 08:16:50 105° 42' 20" 13:34:17 37° 10' 29" 18:56:44 254° 51' 44" 00:03:11 -11:59:04 ---- 14.2 10:35:00 74° 06' Galaxy in Cet
5386 7832 07:51:00 94° 42' 29" 13:37:41 45° 26' 35" 19:29:22 265° 51' 50" 00:06:35 -03:42:57 ---- 13.2 11:30:00 77° 48' Galaxy in Psc
1530 7831 05:23:39 44° 09' 26" 13:38:23 81° 46' 03" 21:58:07 316° 25' 15" 00:07:18 +32:36:34 ---- 13.0 16:25:00 92° 33' Galaxy in And
1539 70 05:49:07 48° 08' 40" 13:49:29 79° 14' 16" 21:54:52 312° 26' 46" 00:18:24 +30:04:46 ---- 13.7 15:55:00 93° 42' Galaxy in And
26 135 08:50:25 107° 32' 23" 14:02:53 35° 49' 17" 19:20:22 253° 03' 23" 00:31:48 -13:20:16 ---- 15.1 10:20:00 80° 12' Galaxy in Cet
39 178 09:00:49 108° 40' 06" 14:10:11 34° 59' 12" 19:24:33 251° 55' 53" 00:39:06 -14:10:21 ---- 12.4 10:15:00 81° 34' Galaxy in Cet
44 223 08:11:23 88° 41' 54" 14:13:48 50° 00' 17" 20:21:13 271° 54' 44" 00:42:42 +00:50:44 ---- 13.4 12:00:00 87° 52' Galaxy in Cet
1591 276 09:47:42 120° 23' 07" 14:23:12 26° 28' 45" 19:03:42 240° 13' 49" 00:52:05 -22:40:48 ---- 15.1 09:09:59 81° 30' Galaxy in Cet
1613 ---- 08:29:05 87° 01' 32" 14:35:54 51° 16' 33" 20:47:43 273° 36' 18" 01:04:48 +02:07:00 12 09.0 12:10:00 93° 28' Galaxy in Cet
89 446 08:31:38 84° 08' 50" 14:46:00 53° 27' 11" 21:05:22 276° 29' 34" 01:14:53 +04:17:38 ---- 12.8 12:25:00 96° 36' Galaxy in Psc
Note: Object size is given in Arc Minutes
Objects with rise and set time of 00:00:00 are circumpolar objects and are always visible.
Lunar separation is the angle between the moon and the object.
The format for the EQTour is as follows and conforms to the new format which includes the magnitude of the object:
15.10833333;55.7630555555556;Dragon;10;M102 - NGC 5866, (Galaxy in Draco )
15.31;2.08277777777778;Serpent Head;5.8;M5 - NGC 5904, (Globular star cluster in Serpens )
16.28333333;-22.975;Scorpion;7.2;M80 - NGC 6093, (Globular star cluster in Scorpius )
16.39333333;-26.5252777777778;Scorpion;5.9;M4 - NGC 6121, (Globular star cluster in Scorpius )
16.54166667;-13.0527777777778;Serpent Bearer;8.1;M107 - NGC 6171, (Globular star cluster in Ophiuchus )
16.695;36.46;Hercules;5.9;M13 - NGC 6205, (Hercules Globular Cluster )
16.78666667;-1.94777777777778;Serpent Bearer;6.6;M12 - NGC 6218, (Globular star cluster in Ophiuchus )
16.95166667;-4.09944444444444;Serpent Bearer;6.6;M10 - NGC 6254, (Globular star cluster in Ophiuchus )
17.02;-30.1122222222222;Serpent Bearer;6.6;M62 - NGC 6266, (Globular star cluster in Ophiuchus)
17.04333333;-26.2680555555556;Serpent Bearer;7.2;M19 - NGC 6273, (Globular star cluster in Ophiuchus )
17.285;43.1363888888889;Hercules;6.5;M92 - NGC 6341, (Globular star cluster in Hercules )
17.32;-18.5163888888889;Serpent Bearer;7.9;M9 - NGC 6333, (Globular star cluster in Ophiuchus )
17.62666667;-3.24611111111111;Serpent Bearer;7.6;M14 - NGC 6402, (Globular star cluster in Ophiuchus )
4/11/2011 10:57:44 AM
Time window 4/11/2011 19:33 to 4/11/2011 23:59 for Location Home_Location 40:50:25 N Latitude 74:54:52 W Longitude.
Sunrise: 06:26:08 Sun set: 19:35:36 Moon Rise: 13:21:51 Moon set: 02:52:38 First Quarter
Minimum Elevation: 0
Viewing time is based on 1 hour after sunset to 1 hour before sunrise where the object is above the minimum requested elevation
M NGC Transit TM Transit EL Obs.Time Start End Before T. After T. Mag Lunar Sep. Name
48 2548 19:54:08 43° 21' 31" 04:54:59 20:39:41 01:34:41 00:00:00 04:54:59 05.8 21° 35' Open star cluster in Hydra
44 2632 20:20:25 69° 08' 29" 06:59:59 20:37:27 03:37:27 00:00:00 06:59:59 03.1 5° 17' Beehive Cluster
67 2682 20:30:44 60° 58' 14" 06:34:59 20:39:33 03:14:33 00:00:00 06:34:59 06.9 3° 38' Open star cluster in Cancer
81 3031 21:35:56 61° 46' 30" 20:39:33 20:39:33 00:00:00 00:56:22 00:00:00 06.9 55° 37' Galaxy in Ursa Major
82 3034 21:36:08 61° 09' 25" 20:39:33 20:39:33 00:00:00 00:56:34 00:00:00 08.4 56° 12' Cigar Galaxy
95 3351 22:24:20 60° 51' 45" 08:29:59 20:38:33 05:08:33 01:45:46 06:44:13 09.7 30° 00' Bared Galaxy in Leo
96 3368 22:27:08 60° 58' 57" 08:34:59 20:35:55 05:10:55 01:51:12 06:43:47 09.2 30° 40' Galaxy in Leo
105 3379 22:28:08 61° 44' 25" 08:34:59 20:39:07 05:14:07 01:49:00 06:45:59 09.3 30° 47' Galaxy in Leo
108 3556 22:51:50 75° 10' 00" 20:39:07 20:39:07 00:00:00 02:12:42 00:00:00 10.1 50° 04' Galaxy in Ursa Major
97 3587 22:55:08 75° 49' 17" 20:39:07 20:39:07 00:00:00 02:16:00 00:00:00 11.2 50° 01' Owl Planetary nebula
65 3623 22:59:14 62° 15' 10" 09:09:59 20:38:18 05:48:18 02:20:55 06:49:04 09.3 38° 15' Galaxy in Leo Triplett
66 3627 23:00:32 62° 09' 01" 09:09:59 20:39:59 05:49:59 02:20:32 06:49:27 09.0 38° 34' Galaxy in Leo Triplett
109 3992 23:37:56 77° 27' 56" 20:39:59 20:39:59 00:00:00 02:57:56 00:00:00 09.8 54° 26' Galaxy in Ursa Major
98 4192 23:54:08 64° 03' 33" 20:36:23 20:36:23 00:00:00 03:17:44 00:00:00 10.1 51° 15' Galaxy in Coma Berenices
99 4254 23:59:08 63° 34' 34" 20:38:13 20:38:13 00:00:00 03:20:54 00:00:00 09.8 52° 30' Galaxy in Coma Berenices
106 4258 23:59:20 83° 32' 09" 20:36:43 20:36:43 00:00:00 03:22:36 00:00:00 08.3 55° 23' Galaxy in Canes Venatici
Note: Object size is given in Arc Minutes
Objects with rise and set time of 00:00:00 are circumpolar objects and are always visible.
Lunar separation is the angle between the moon and the object.
ASTROART Report Format:
The Astroart format is rather simple. The name the RA and the DEC are given. Each report is limited to 30 entries . IF the query result is greater than 30 separate files will be generated with the Page number in the file name.
Columns 1 – 13 Name with no blanks
Columns 14 -23 RA in the format 00 00 00.0 (col 14-15 deg, 17-18 min, 20-23 sec and decimal seconds)
Columns 27- 37 DEC in the format +00 00 00.0 (same as above)
IC1026 14 30 12.0 +31 12 54.0
NGC5644 14 30 24.0 +11 55 41.0
NGC5667 14 30 24.0 +59 28 11.0
NGC5656 14 30 24.0 +35 19 15.0
NGC5648 14 30 36.0 +14 01 22.0
NGC5649 14 30 36.0 +14 01 22.0
NGC5647 14 30 36.0 +11 52 35.0
NGC5657 14 30 42.0 +29 10 50.0
NGC5645 14 30 42.0 +07 16 28.0
NGC5650 14 30 48.0 +05 58 41.0
NGC5652 14 30 54.0 +05 58 41.0
NGC5655 14 31 00.0 +13 58 08.0
NGC5659 14 31 06.0 +25 21 19.0
NGC5651 14 31 18.0 -00 19 02.0
NGC5673 14 31 30.0 +49 57 30.0
NGC5661 14 31 54.0 +06 15 01.0
NGC5678 14 32 06.0 +57 55 16.0
NGC5658 14 32 24.0 -00 22 00.0
NGC5665 14 32 24.0 +08 04 45.0
This report shows you the total observation time for that object and the time ( hours, minutes, seconds) Before Transit and After transit . These times are based on one hour after sunset and one hour before sunrise where the object is above the minimum Elevation specified.
The calculator was added to allow you to convert Degrees to Hours and visa-versa.
Simply enter the value in the box in the format shown above the box and click DO IT. The remaining boxes will be populated with the result.
The second part allows you to convert Parsec to Light Years and visa-versa.
The third part of the calculator will calculate the magnitude of an object given the magnitude and ADU of a reference star as well as the ADU of the object in question
Provide the data in the brown boxes , Click Calc. Mag and the result will be shown in the green box.
To exit the program click the EXIT button.
If you have further questions or problems contact me at email@example.com
hope this provides some useful information
CLICK HERE to DOWNLOAD the latest version.
In version 2.2.3 I have added the capability to tell the mount to slew to a specific RA and DEC location.
This feature is available on the TOOL menu of the main window.
Clicking on the menu item will open a window that allows you to enter the RA and DEC coordinates that you want the ASCOM mount to slew to.
The RA values can be entered as a string ( hh:mm:ss) or or hour decimal value ( hh.hhhhh)
Likewise the DEC value can be entered as a string (dd:mm:ss) or degree
decimal value (ddd.ddddd)
The decimal values will be displayed below the box once you move off the box.
Clicking on the GOT OBJECT button will send you to the ASCOM screen ( see ASCOM Telescope Interface above) where you can connect to the mount and request it to make the slew.
If ASCOM is not loaded on your system you will be notified as such and the button will be disabled.
Version 2.2.4 adds the ability to get information about surrounding objects. Simply enter the coordinates in the upper half of the form, enter the radius that you are interested in (in arc minutes) and click on the SIMBAD button.
You will be presented with a browser view of the data.
If the Internet is not available the SIMBAD button will not be enabled.
You can also request to view the sky at those coordinates. By clicking the button you will open a web page directed to SKY-MAP.com displaying the images of the sky.
Version 2.2.21 added a tool that will provide you with a list of Alignment star pairs for two star alignment which can be used with the Synscan Hand Controller. I was made aware of the Idea y John Dwyer of the EQ6 yahoo group who developed it using EXCEL spread sheet. I took that concept and applied it to the TonightSky application.
The program uses the Star data base and extracts the stars who's magnitude is brighter than that given on the page. The default is MAG 2.
To access the tool, on the menu bar click on TOOLS> Alignment Stars . The page below will be displayed
Then picture above shows the interface. The location information is read from the main page of the TonightSky app. as well as the Date and time and minimum elevation angle
to generate the list click the GO button.
The ratings listed in the display refer to:
Rating 1 refers the Elevation difference between star1 and star2:
A = Delta < 24 and > 16
B = Delta <27 and > 13
C = other values
Rating 2 refers to the Azimuth difference between star 1 and
A = Delta <101 and > 79
B = Delta <116 and >65
C = other values
The ideal azimuth delta is 90 degrees.
To see the RA, DEC and Mag of a star click on the star name and a popup box will display that information as pictured above.
If you want to save the data to a file simply CHECK the box " Output list into file" . To open the open the file click on the file name above the GO button.
Synta Alignment Star Recommendations: ALT-AZ 2-Star Alignment:
1. Altitude of stars should be between 15 and 60 degrees.
2. Deviation of altitude between the two stars should be between 10 and 30 degrees.
3. Deviation of azimuth between the two stars should be between 45 and 135 degrees, with the optimum being 90 degrees.
If you select the option to have the data stored in file it will be in your "MY DOCUMENTS" folder.
Here is an example of that file:
2 Star Alignment Star List
08/15/2014 3:34:15 PM
For: 08/15/2014 21:40:58 at Location Home Location 40:50:25 N Latitude 74:54:52.75 W Longitude.
Minimum Elevation: 0 Minimum Magnitude: 2
STAR1 Mag1 AZ Alt Dir1 STAR2 Mag2 AZ Alt Dir2 AZ Diff ELEV Diff Rating1 Rating2
Alioth 1.77 315.90 37.35 W Antares 0.96 205.65 18.10 W 110 19 A B
Alkaid 1.86 304.36 43.01 W Antares 0.96 205.65 18.10 W 99 25 B A
Altair 0.77 141.10 52.09 E Arcturus -0.04 266.33 34.30 W 125 18 A C
Antares 0.96 205.65
Antares 0.96 205.65
Antares 0.96 205.65 18.10 W Arcturus -0.04 266.33 34.30 W 61 16 A C
Antares 0.96 205.65
Arcturus -0.04 266.33 34.30 W Altair 0.77 141.10 52.09 E 125 18 A C
Arcturus -0.04 266.33 34.30 W Antares 0.96 205.65 18.10 W 61 16 A C
Benetnasch 1.86 304.36 43.01 W Antares 0.96 205.65 18.10 W 99 25 B A
Version 2.2.22 added the capability to sort the display. Simply select a column to sort on and click on the sort option in the option box.
This version also added the ability to connect to an ASCOM scope.
If ASCOM is laded on your system the Telescope icon will be displayed on the page when you click on a star name.
Clicking on the icon will open the ASCOM interface window where you can chose the scope to connect to and make the connection ( see ASCOM Telescope interface section above)