ASTRO(7) Miscellaneous Information Manual ASTRO(7)
astro - print astronomical information
astro [ -dlepsatokm ] [ -cn ]
Astro reports upcoming celestial events, by default for 24 hours start-
ing now. The options are:
d Read the starting date. A prompt gives the input format.
l Read the north latitude, west longitude, and elevation of the
observation point. A prompt gives the input format. If l is
missing, the initial position is read from the file
c Report for n (default 1) successive days.
e Report fractional overlap during eclipses.
p 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), dec-
lination (degrees, minutes, seconds), azimuth (degrees), eleva-
tion (degrees), and semidiameter (arc minutes). For the sun and
moon, the magnitude is also printed.
s Print output in English words suitable for speech synthesizers.
a Include a list of artificial earth satellites for interesting
events. (There are no orbital elements for the satellites, so
this option is not usable.)
t Read T from standard input. T is the difference between
ephemeris and universal time (seconds) due to the slowing of the
earth's rotation. T is normally calculated from an empirical
formula. This option is needed only for very accurate timing of
occultations, eclipses, etc.
o Search for stellar occultations.
k Print times in local time (`kitchen clock') as described in the
timezone environment variable.
m Includes a single comet in the list of objects. This is modi-
fied (in the source) to refer to an approaching comet but in
steady state usually refers to the last interesting comet (cur-
rently Levy, 1990c).
ecliptic star data
default latitude (N), longitude (W), and elevation (meters)
The k option reverts to GMT outside of 1970-2036.