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Annotation of researchv10dc/man/man7/sky.7, revision 1.1.1.1

1.1       root        1: .TH SKY 7 bowell
                      2: .CT 1 inst_info
                      3: .SH NAME
                      4: sky \- astronomical ephemeris
                      5: .SH SYNOPSIS
                      6: .B sky
                      7: [
                      8: .B -l
                      9: ]
                     10: .SH DESCRIPTION
                     11: .I Sky
                     12: predicts the apparent locations of the sun, moon, visible planets,
                     13: and stars brighter than magnitude 2.5.
                     14: It reads one line from the standard input to obtain the desired time
                     15: expressed as five numbers: year, month, day, hour, and minute in GMT.
                     16: An empty line means now.
                     17: Each object is printed with astronomical coordinates, azimuth-elevation
                     18: coordinates relative to Murray Hill, NJ, and magnitude.
                     19: For variable stars the maximum magnitude is printed with 
                     20: .LR * .
                     21: .PP
                     22: Option 
                     23: .B -l
                     24: causes
                     25: .I sky 
                     26: to prompt for another viewing location.
                     27: .PP
                     28: Standard astronomical effects are accounted for:
                     29: nutation and precession of the equinox, annual aberration, diurnal parallax,
                     30: and proper motion.
                     31: Atmospheric effects (extinction and refraction) are not calculated,
                     32: nor is perturbation of the earth by other bodies.
                     33: .PP
                     34: In ephemeris (slighly different from civil) time, the program
                     35: yields
                     36: positions of sun, moon, and stars good to a few tenths of an
                     37: arc-second.
                     38: Planets are good to a few seconds.
                     39: .SH FILES
                     40: .F /usr/lib/startab
                     41: .SH SEE ALSO
                     42: .IR scat (7)
                     43: .br
                     44: .I
                     45: American Ephemeris and Nautical Almanac
                     46: and
                     47: .I
                     48: Explanatory Supplement to the American Ephemeris and Nautical Almanac

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