1 058b0118 2005-01-03 devnull .TH ASTRO 1
  2 058b0118 2005-01-03 devnull .SH NAME
  3 058b0118 2005-01-03 devnull astro \- print astronomical information
  4 058b0118 2005-01-03 devnull .SH SYNOPSIS
  5 058b0118 2005-01-03 devnull .B astro
  6 058b0118 2005-01-03 devnull [
  7 058b0118 2005-01-03 devnull .B -dlpsatokm
  8 058b0118 2005-01-03 devnull ]
  9 058b0118 2005-01-03 devnull [
 10 058b0118 2005-01-03 devnull .B -c
 11 058b0118 2005-01-03 devnull n
 12 058b0118 2005-01-03 devnull ]
 13 058b0118 2005-01-03 devnull [
 14 058b0118 2005-01-03 devnull .B -C
 15 058b0118 2005-01-03 devnull d
 16 058b0118 2005-01-03 devnull ]
 17 058b0118 2005-01-03 devnull [
 18 058b0118 2005-01-03 devnull .B -e
 19 058b0118 2005-01-03 devnull .I obj1
 20 058b0118 2005-01-03 devnull .I obj2
 21 058b0118 2005-01-03 devnull ]
 22 058b0118 2005-01-03 devnull .SH DESCRIPTION
 23 058b0118 2005-01-03 devnull .I Astro
 24 058b0118 2005-01-03 devnull reports upcoming celestial events, by default for 24 hours starting now.
 25 058b0118 2005-01-03 devnull The options are:
 26 058b0118 2005-01-03 devnull .TP
 27 058b0118 2005-01-03 devnull .B d
 28 058b0118 2005-01-03 devnull Read the starting date.
 29 058b0118 2005-01-03 devnull A prompt gives the input
 30 058b0118 2005-01-03 devnull format.
 31 058b0118 2005-01-03 devnull .TP
 32 058b0118 2005-01-03 devnull .B l
 33 058b0118 2005-01-03 devnull Read the north latitude, west longitude, and elevation of the observation point.
 34 058b0118 2005-01-03 devnull A prompt gives the input format.
 35 058b0118 2005-01-03 devnull If
 36 058b0118 2005-01-03 devnull .B l
 37 058b0118 2005-01-03 devnull is missing, the initial position is read from the file
 38 c8b6342d 2005-01-13 devnull .BR \*9/sky/here .
 39 058b0118 2005-01-03 devnull .TP
 40 058b0118 2005-01-03 devnull .B c
 41 058b0118 2005-01-03 devnull Report for
 42 058b0118 2005-01-03 devnull .I n
 43 058b0118 2005-01-03 devnull (default 1) successive days.
 44 058b0118 2005-01-03 devnull .TP
 45 058b0118 2005-01-03 devnull .B C
 46 058b0118 2005-01-03 devnull Used with
 47 058b0118 2005-01-03 devnull .BR -c ,
 48 058b0118 2005-01-03 devnull set the interval to
 49 058b0118 2005-01-03 devnull .B d
 50 058b0118 2005-01-03 devnull days (or fractions of days).
 51 058b0118 2005-01-03 devnull .TP
 52 058b0118 2005-01-03 devnull .B e
 53 058b0118 2005-01-03 devnull Report distance between the centers of
 54 058b0118 2005-01-03 devnull objects, in arc seconds, during eclipses or occultations involving
 55 058b0118 2005-01-03 devnull .I obj1
 56 058b0118 2005-01-03 devnull and
 57 058b0118 2005-01-03 devnull .IR obj2 .
 58 058b0118 2005-01-03 devnull .TP
 59 058b0118 2005-01-03 devnull .B p
 60 058b0118 2005-01-03 devnull Print the positions of objects at the
 61 058b0118 2005-01-03 devnull given time rather than searching for interesting
 62 058b0118 2005-01-03 devnull conjunctions.
 63 058b0118 2005-01-03 devnull For each, the name is followed by
 64 058b0118 2005-01-03 devnull the right ascension (hours, minutes, seconds),
 65 058b0118 2005-01-03 devnull declination (degrees, minutes, seconds),
 66 058b0118 2005-01-03 devnull azimuth (degrees),
 67 058b0118 2005-01-03 devnull elevation (degrees),
 68 058b0118 2005-01-03 devnull and semidiameter (arc seconds).
 69 058b0118 2005-01-03 devnull For the sun and moon, the magnitude is also printed.
 70 058b0118 2005-01-03 devnull The first line of output presents the date and time,
 71 058b0118 2005-01-03 devnull sidereal time, and the latitude, longitude, and elevation.
 72 058b0118 2005-01-03 devnull .TP
 73 058b0118 2005-01-03 devnull .B s
 74 058b0118 2005-01-03 devnull Print output in English words suitable for speech synthesizers.
 75 058b0118 2005-01-03 devnull .TP
 76 058b0118 2005-01-03 devnull .B a
 77 058b0118 2005-01-03 devnull Include a list of artificial earth satellites for interesting events.
 78 058b0118 2005-01-03 devnull (There are no orbital elements for the satellites, so this option
 79 058b0118 2005-01-03 devnull is not usable.)
 80 058b0118 2005-01-03 devnull .TP
 81 058b0118 2005-01-03 devnull .B t
 82 058b0118 2005-01-03 devnull Read
 83 058b0118 2005-01-03 devnull ΔT
 84 058b0118 2005-01-03 devnull from standard input.
 85 058b0118 2005-01-03 devnull ΔT
 86 058b0118 2005-01-03 devnull is the difference between ephemeris and
 87 058b0118 2005-01-03 devnull universal time (seconds) due to the slowing of the earth's rotation.
 88 058b0118 2005-01-03 devnull ΔT
 89 058b0118 2005-01-03 devnull is normally calculated from an empirical formula.
 90 058b0118 2005-01-03 devnull This option is needed only for very accurate timing of
 91 058b0118 2005-01-03 devnull occultations, eclipses, etc.
 92 058b0118 2005-01-03 devnull .TP
 93 058b0118 2005-01-03 devnull .B o
 94 058b0118 2005-01-03 devnull Search for stellar occultations.
 95 058b0118 2005-01-03 devnull .TP
 96 058b0118 2005-01-03 devnull .B k
 97 058b0118 2005-01-03 devnull Print times in local time (`kitchen clock')
 98 058b0118 2005-01-03 devnull as described in the
 99 058b0118 2005-01-03 devnull .B timezone
100 058b0118 2005-01-03 devnull environment variable.
101 058b0118 2005-01-03 devnull .TP
102 058b0118 2005-01-03 devnull .B m
103 058b0118 2005-01-03 devnull Includes a single comet in the list of objects.
104 058b0118 2005-01-03 devnull This is modified (in the source) to refer to an approaching comet
105 058b0118 2005-01-03 devnull but in steady state
106 058b0118 2005-01-03 devnull usually refers to the last interesting comet (currently Hale-Bopp, C/1995 O1).
107 058b0118 2005-01-03 devnull .SH FILES
108 058b0118 2005-01-03 devnull .TP
109 c8b6342d 2005-01-13 devnull .B \*9/sky/estartab
110 058b0118 2005-01-03 devnull ecliptic star data
111 058b0118 2005-01-03 devnull .TP
112 c8b6342d 2005-01-13 devnull .B \*9/sky/here
113 058b0118 2005-01-03 devnull default latitude (N), longitude (W), and elevation (meters)
114 058b0118 2005-01-03 devnull .SH SOURCE
115 c3674de4 2005-01-11 devnull .B \*9/src/cmd/astro
116 058b0118 2005-01-03 devnull .SH SEE ALSO
117 d32deab1 2020-08-16 rsc .MR scat (1)
118 058b0118 2005-01-03 devnull .SH BUGS
119 058b0118 2005-01-03 devnull The
120 058b0118 2005-01-03 devnull .B k
121 058b0118 2005-01-03 devnull option reverts to GMT outside of 1970-2036.