astro – print astronomical information
Read the starting date. A prompt gives the input format.
Read the north latitude, west longitude, and elevation of the observation point.
A prompt gives the input format.
Report distance between the centers of
objects, in arc seconds, during eclipses or occultations involving
Print the positions of objects at the given time rather than searching for interesting conjunctions. For each, the name is followed by the right ascension (hours, minutes, seconds), declination (degrees, minutes, seconds), azimuth (degrees), elevation (degrees), and semidiameter (arc seconds). For the sun and moon, the magnitude is also printed. The first line of output presents the date and time, sidereal time, and the latitude, longitude, and elevation.
Print output in English words suitable for speech synthesizers.
Include a list of artificial earth satellites for interesting events. (There are no orbital elements for the satellites, so this option is not usable.)
Read ΔT from standard input. ΔT is the difference between ephemeris and universal time (seconds) due to the slowing of the earth’s rotation. ΔT is normally calculated from an empirical formula. This option is needed only for very accurate timing of occultations, eclipses, etc.
Search for stellar occultations.
Print times in local time (‘kitchen clock’)
as described in the
Includes a single comet in the list of objects. This is modified (in the source) to refer to an approaching comet but in steady state usually refers to the last interesting comet (currently Hale-Bopp, C/1995 O1).
ecliptic star data
default latitude (N), longitude (W), and elevation (meters)