ITelescopeV3EquatorialSystem Property |
Equatorial coordinate system used by this telescope (e.g. Topocentric or J2000).
Namespace: ASCOM.DeviceInterface
Assembly: ASCOM.DeviceInterfaces (in ASCOM.DeviceInterfaces.dll) Version: 3351c4f3fa64146a7efd5b51ed4591e32a0a5484
SyntaxProperty Value
Type: EquatorialCoordinateTypeExceptions| Exception | Condition |
|---|---|
| NotConnectedException | If the device is not connected |
| DriverException | An error occurred that is not described by one of the more specific ASCOM exceptions. Include sufficient detail in the message text to enable the issue to be accurately diagnosed by someone other than yourself. |
RemarksMust be implemented, must not throw a PropertyNotImplementedException.
Most amateur telescopes use topocentric coordinates. This coordinate system is simply the apparent position in the sky (possibly uncorrected for atmospheric refraction) for "here and now", thus these are the coordinates that one would use with digital setting circles and most amateur scopes. More sophisticated telescopes use one of the standard reference systems established by professional astronomers. The most common is the Julian Epoch 2000 (J2000). These instruments apply corrections for precession,nutation, abberration, etc. to adjust the coordinates from the standard system to the pointing direction for the time and location of "here and now".This is only available for telescope InterfaceVersions 2 and later.
See Also