I have a telescope that I have built out of surplus components. Some of you may remember this image of M27, the famous Dumbbell Nebula, acquired my home-brew 90mm astrograph and inexpensive equatorial mount:
from my blog post on using Lucy-Richardson deconvolution to correct tracking errors in astronomical images:
Fixing Bad Astrophotography Using Mathematica 8 and Advanced Image DeconvolutionI recently upgraded to a new Losmandy
G11 mount with a Gemini II controller and here I will explain how to control it with Mathematica.
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Initialization
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Although I've used a Losmandy mount for this example, many other computerized telescope mounts can also be controlled using the ASCOM interface.
First, make sure you have the latest version of the ASCOM platform installed on your system. You can obtain it for free from here:
www.ascom-standards.org Also make sure you have the correct drivers specific to your mount installed. Links to many popular telescope mounts can be found on the ASCOM site. Finally, this following code presumes your mount is properly set up and polar aligned.
.NET/Link installation
Needs["NETLink`"];
InstallNET["Force32Bit" -> True];
Load ASCOM Assemblies
loadASCOMNETAssembly["All"] :=
Map[LoadNETAssembly,
Map["ASCOM." <> # &, {"Astrometry", "Attributes", "DriverAccess",
"Exceptions", "Helper", "Helper2", "IConform", "Interfaces",
"Utilities"}]]
loadASCOMNETAssembly["All"];
Load the ASCOM.DriverAccess.Telescope type so we can call the Choose static method
LoadNETType["ASCOM.DriverAccess.Telescope"];
======================
Working with Telescope
======================
Choose telescope dialog
telescopeDriver = Telescope`Choose[""];
myTelescope = NETNew["ASCOM.DriverAccess.Telescope", telescopeDriver];
Telescope set up dialog (optional)
myTelescope@SetupDialog[];
Connect to scope
myTelescope@Connected = True;
Unpark scope
myTelescope@Unpark[];
Start tracking
myTelescope@Tracking = True;
Utility function for object location
SlewToObject[telescope_, object_String] :=
Module[{ra, dec},
Speak["Looking up coordinates for " <> object];
ra = AstronomicalData[object, {"RightAscension", DateList[]},
TimeZone -> $TimeZone];
dec = AstronomicalData[object, {"Declination", DateList[]},
TimeZone -> $TimeZone];
Speak["Slewing to " <> object];
telescope@SlewToCoordinates[ra, dec];
]
Slew to some objects
SlewToObject[myTelescope, "Mizar"]
SlewToObject[myTelescope, "Arcturus"]
SlewToObject[myTelescope, "M81"]
SlewToObject[myTelescope, "M82"]
SlewToObject[myTelescope, "Alkaid"]
SlewToObject[myTelescope, "M42"]
Park scope
myTelescope@Park[];
Disconnect from scope
myTelescope@Connected = False;
