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ASTRO(7)							      ASTRO(7)

       astro - print astronomical information

       astro [ -dlpsatokm ] [ -c n ] [ -C d ] [ -e obj1 obj2 ]

       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.

       C      Used with -c, set the interval to d days (or fractions of days).

       e      Report  distance between the centers of objects, in arc seconds,
	      during eclipses or occultations involving obj1 and obj2.

       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 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.

       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  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.

       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 Hale-Bopp, C/1995 O1).

	      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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