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Plan 9 - man page for astro (plan9 section 7)

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ASTRO(7)										 ASTRO(7)

       astro - print astronomical information

       astro [ -dlepsatokm ] [ -cn ]

       Astro  reports  upcoming  celestial  events,  by  default  for 24 hours starting 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 /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-
	      ment variable.

       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.

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