20,000-Year Lunar Phase Calculator
BC 9999 to AD 9999
PHP Program by Jay Tanner - 2026 - Built Around The NASA/JPL Horizons API
Optional Location Name
Geographic GPS Coordinates
Longitude
Latitude
Altitude
m
Base Time Scale
Time Zone
Daylight / Summer Time
Date and Time
View PHP Source Code
Download This Program + Phase Images (Approx. 13.2 MB)
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Phase Angle: 187.2434°
Full Moon.
Distance: 401,021.4 km = 249,183.2 mi
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====================================================== TOPOCENTRIC LUNAR PHASE CALCULATOR FOR ANY GIVEN DATE, TIME AND LOCATION Calendar Date/Time AD 2026-May-01 21:38:44 Time Scale: UT Time Zone UT-05:00 (Ignored if TT Scale) Standard Time Location Name Central New York State, USA Longitude = -76.862737° Latitude = +42.904788° Altitude = +150 m Reference Frame ICRF International Celestial Reference Frame Mean refraction is applied to rise/set computations. ###################################################### MOON RISE / TRANSIT / SET TIMES Standard Time Local Date and Time Azim Dir Event Elev -------------------- -------- --- ------- ------ AD 2026-May-01 04:32 244.65° WSW Set AD 2026-May-01 19:37 119.40° ESE Rise ###################################################### MOON TOPOCENTRIC EPHEMERIS STATISTICS Calendar Date AD 2026-May-01 Local Time 21:38:44 Standard Time Local Time Zone UT-05:00 NOTE: Time Zone is ignored if using the TT time Scale Julian Date 2461162.610231481 UT Right Ascension 14h 50m 05.227s 14.834785366333 h 222° 31' 18.410" 222.521780495° Declination -21° 50' 43.286" -21.845357315° Distance 401,021.4 km 249,183.2 mi 0.00268066276203 AU Angular Diameter 0° 29' 47.264" 1787.264" 0.4964622222° Visual Magnitude -12.419 Horizon Azimuth 142.02° Direction: SE Horizon Elevation +15.67° Above Local Horizon Lunar Phase Angle 187.2434° Full Moon. Where: 0° = New Moon 45 = Waxing Crescent 90 = First Quarter 135 = Waxing Gibbous 180 = Full Moon 225 = Waning Gibbous 270 = Last Quarter 315 = Waning Crescent 360 = New Moon ###################################################### Local Hour Angle -02h 38m 40.042s -2.644456145 h -39° 40' 00.632" -39.666842175° Loc Sidereal Time 12h 11m 25.185s 12.1903292212 h 182° 51' 17.778" 182.854938318° Radial Velocity -0.168316 km/s -605.9376 km/h -0.1045867 mi/s -376.5121689 mi/h Approaching Observer Delta T (TDB−UT) +69.185448 sec +0d 00h 01m 09.185448s ######################################################