astro - print astronomical information
astro [ -dlepsatokm ] [ -cn ]
Astro reports upcoming celestial events, by default for 24 hours starting now. The
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 /lib/sky/here.
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 inter-
esting conjunctions. For each, the name is followed by the right ascension (hours,
minutes, seconds), declination (degrees, minutes, seconds), azimuth (degrees), ele-
vation (degrees), and semidiameter (arc minutes). For the sun and moon, the magni-
tude 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 univer-
sal 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 environ-
m 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 Levy, 1990c).
ecliptic star data
default latitude (N), longitude (W), and elevation (meters)
The k option reverts to GMT outside of 1970-2036.