Astronomical Almanac

Calculate Object Positions and Provide Nightly Almanac

The Astronomical Almanac is an interface to the Sky Calculator programme written by John Thorstensen of Dartmouth College. The code precesses coordinates, gives object positions, time, date, Sun, Moon and planet information. To calculate the position of an astronomical object in the horizon system (azimuth and elevation) the Astronomical Almanac requires the coordinates of the location of observation (latitude, longitude and height), the date and time of the observation and the coordinates (right ascension, declination and epoch) of the object. The "Submit Request" will return the results of the Astronomical Almanac. A full description of the facility is available. The user should refer to the description of the Input Parameters before use or read the short instructions and guidelines. A full explanation of the Astronomical Almanac Output Parameters is also available.

For convenience two pull-down menus are included, one to allow you to specify one of the EVN VLBI sites or the more common global VLBI sites and the other to select one of the more common radio astronomical calibrator sources. To ensure information is returned for the location and object of your choice select "Use Inputs" from the location and astronomical object menus.

Location:		Astronomical Object:
Catalogue:		Catalogue Object:
West Longitude: (hh mm ss)	Latitude: (dd mm ss)		Height: (m)
Date: (yyyy mm dd)	Time: (hh mm ss)		Time Zone: (hh)
RA: (hh mm ss)	Declination: (dd mm ss)		Epoch: (yyyy)
Date Type:	Time Type:		DST Use:

The information supplied by this facility should be regarded as approximate only. The author accepts no responsibility for any failure or inadequacies of the interface nor the Sky Calculator programme and disavows any legal liability as a result of the use of this facility. The facility has limited error checking capabilities but if you find obvious errors please contact the Webmaster.