U.S. Naval Observatory
Astronomical Applications Department
Compare these USNO computations with those provided by StarPilot.
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Note that if you want accurate values for moon data, it is best to run the Precompute function. Sight Planner results are from the Fast Almanac mode which does not give high precision for the moon.
You can access this wonderful resource for other uses at the USNO's Celestial Navigation Data
Celestial Navigation Data for 1999 Oct 21 at 5:00:00 UT
For Assumed Position: Latitude N 47 39.0
Longitude W 122 20.0
Almanac Data | Altitude Corrections
Object GHA Dec Hc Zn | Refr SD PA Sum
o ' o ' o ' o | ' ' ' '
MOON 122 37.3 S10 28.0 +31 52.9 180.3 | -1.7 15.8 49.3 63.4
JUPITER 75 28.8 N10 07.4 +35 41.5 117.8 | -1.4 0.4 0.0 -0.9
SATURN 60 53.3 N13 49.9 +29 17.9 102.0 | -1.8 0.2 0.0 -1.6
ALDEBARA 35 13.5 N16 30.5 +14 02.3 80.8 | -3.9 0.0 0.0 -3.9
ALIOTH 270 42.7 N55 57.8 +16 56.3 342.1 | -3.2 0.0 0.0 -3.2
ALKAID 257 19.9 N49 19.0 +14 28.4 331.6 | -3.7 0.0 0.0 -3.7
ALPHECCA 230 32.5 N26 43.2 + 8 17.7 301.0 | -6.3 0.0 0.0 -6.3
ALPHERAT 102 06.4 N29 05.4 +65 44.4 132.7 | -0.4 0.0 0.0 -0.4
ALTAIR 166 30.8 N 8 52.3 +36 15.0 238.6 | -1.4 0.0 0.0 -1.4
CAPELLA 25 02.0 N45 59.7 +28 10.3 51.4 | -1.8 0.0 0.0 -1.8
DENEB 153 50.8 N45 17.1 +68 19.1 275.5 | -0.4 0.0 0.0 -0.4
DIPHDA 93 18.4 S17 59.3 +19 23.5 150.7 | -2.8 0.0 0.0 -2.8
DUBHE 298 17.3 N61 45.0 +19 26.9 358.0 | -2.8 0.0 0.0 -2.8
ELNATH 22 38.0 N28 36.3 +14 43.5 63.5 | -3.7 0.0 0.0 -3.7
ELTANIN 195 03.5 N51 29.7 +44 39.5 303.3 | -1.0 0.0 0.0 -1.0
ENIF 138 09.6 N 9 52.6 +49 55.9 204.7 | -0.8 0.0 0.0 -0.8
FOMALHAU 119 47.6 S29 37.5 +12 41.5 177.7 | -4.3 0.0 0.0 -4.3
HAMAL 72 24.6 N23 27.7 +43 47.7 103.5 | -1.0 0.0 0.0 -1.0
KOCHAB 241 32.9 N74 09.6 +38 24.4 342.3 | -1.3 0.0 0.0 -1.3
MARKAB 118 00.9 N15 12.4 +57 21.6 172.3 | -0.6 0.0 0.0 -0.6
MENKAR 58 38.0 N 4 05.3 +20 30.8 107.3 | -2.6 0.0 0.0 -2.6
MIRFAK 53 07.3 N49 51.5 +45 58.8 60.1 | -1.0 0.0 0.0 -1.0
RASALHAG 200 28.7 N12 33.9 +17 12.5 269.9 | -3.2 0.0 0.0 -3.2
SCHEDAR 94 04.3 N56 32.2 +70 41.1 52.1 | -0.3 0.0 0.0 -0.3
VEGA 184 58.5 N38 47.4 +44 46.3 282.8 | -1.0 0.0 0.0 -1.0
POLARIS 65 53.1 N89 15.6 +48 03.3 0.9 | -0.9 0.0 0.0 -0.9
ARIES 104 12.2
Moon phase is waxing gibbous, 83% illuminated
Orange stars are magnitude 2.3 or fainter, other colors explained in "Notes on data."
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Notes on the data
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