Basic NASA/JPL Horizons Lunar Ephemeris
Built Around The NASA/JPL Horizons API
PHP Program by Jay Tanner of Geneva, NY, USA
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############################################################################# BASIC NASA/JPL HORIZONS TOPOCENTRIC LUNAR EPHEMERIS EPHEMERIS SPAN: AD 1800-JAN-02 23:59:41.3795 UT to AD 2199-DEC-28 23:58:50.8163 UT --------------------------------------------------- NASA/JPL Database ID = Moon (301) Base Time Scale = UT Local Time Zone Offset = UT-05:00 (Ignored if using TT scale.) Daylight / Summer Time = No Optional Location Label = Geneva, NY, USA GPS Longitude = -76.996491 ° (+Pos = East) GPS Latitude = +42.868473 ° (+Pos = North) START Era / Date / Time = AD 2026-Sep-01 00:00:00 STOP Era / Date / Time = AD 2026-Sep-30 00:00:01 Ephemeris Step Size = 1 day ******************************************************************* NASA/JPL HORIZONS LUNAR EPHEMERIS DATA OUTPUT FOLLOWS BELOW ******************************************************************* Calend_Date Time RA_HMS Declin__DMS Dist_Mi Vis_Mag ----------- -------- ----------- ----------- ------------- ------- 2026-Sep-01 00:00:00 01 40 34.23 +14 32 42.2 231,751.769 -11.444 2026-Sep-02 00:00:00 02 34 33.77 +19 43 56.2 230,460.992 -11.085 2026-Sep-03 00:00:00 03 32 23.95 +23 50 48.1 229,514.627 -10.686 2026-Sep-04 00:00:00 04 33 51.15 +26 30 57.0 228,917.019 -10.232 2026-Sep-05 00:00:00 05 37 39.47 +27 26 43.9 228,687.290 -9.705 2026-Sep-06 00:00:00 06 41 42.67 +26 30 31.5 228,862.598 -9.082 2026-Sep-07 00:00:00 07 43 49.36 +23 47 45.4 229,491.746 -8.340 2026-Sep-08 00:00:00 08 42 31.98 +19 35 15.0 230,620.095 -7.454 2026-Sep-09 00:00:00 09 37 25.57 +14 16 15.4 232,269.655 -6.401 2026-Sep-10 00:00:00 10 28 55.40 +08 15 27.6 234,420.106 -5.169 2026-Sep-11 00:00:00 11 17 54.24 +01 55 53.2 236,996.615 -4.157 2026-Sep-12 00:00:00 12 05 24.30 -04 22 19.8 239,868.251 -5.348 2026-Sep-13 00:00:00 12 52 26.64 -10 22 03.6 242,857.406 -6.428 2026-Sep-14 00:00:00 13 39 55.23 -15 48 45.5 245,757.540 -7.322 2026-Sep-15 00:00:00 14 28 32.29 -20 29 55.0 248,354.924 -8.065 2026-Sep-16 00:00:00 15 18 43.23 -24 14 41.0 250,450.203 -8.690 2026-Sep-17 00:00:00 16 10 31.32 -26 53 52.2 251,876.911 -9.224 2026-Sep-18 00:00:00 17 03 35.03 -28 20 27.1 252,515.587 -9.691 2026-Sep-19 00:00:00 17 57 11.53 -28 30 21.6 252,303.295 -10.109 2026-Sep-20 00:00:00 18 50 28.30 -27 23 07.6 251,238.854 -10.492 2026-Sep-21 00:00:00 19 42 39.01 -25 01 56.7 249,384.098 -10.854 2026-Sep-22 00:00:00 20 33 16.61 -21 33 06.9 246,861.127 -11.203 2026-Sep-23 00:00:00 21 22 18.81 -17 05 13.0 243,845.122 -11.546 2026-Sep-24 00:00:00 22 10 06.51 -11 48 32.7 240,552.063 -11.888 2026-Sep-25 00:00:00 22 57 18.83 -05 55 01.6 237,220.906 -12.234 2026-Sep-26 00:00:00 23 44 47.84 +00 21 23.9 234,090.782 -12.578 2026-Sep-27 00:00:00 00 33 33.94 +06 44 10.5 231,375.443 -12.601 2026-Sep-28 00:00:00 01 24 40.28 +12 53 35.8 229,239.219 -12.291 2026-Sep-29 00:00:00 02 19 03.28 +18 26 45.7 227,779.981 -11.961 2026-Sep-30 00:00:00 03 17 15.86 +22 58 35.6 227,023.916 -11.610 *********************************************************************** BELOW IS THE RAW HORIZONS EPHEMERIS FROM WHICH THE ABOVE WAS EXTRACTED. *********************************************************************** API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: July 31, 2013 Moon / (Earth) 301 GEOPHYSICAL DATA (updated 2018-Aug-15): Vol. mean radius, km = 1737.53+-0.03 Mass, x10^22 kg = 7.349 Radius (gravity), km = 1738.0 Surface emissivity = 0.92 Radius (IAU), km = 1737.4 GM, km^3/s^2 = 4902.800066 Density, g/cm^3 = 3.3437 GM 1-sigma, km^3/s^2 = +-0.0001 V(1,0) = +0.21 Surface accel., m/s^2 = 1.62 Earth/Moon mass ratio = 81.3005690769 Farside crust. thick. = ~80 - 90 km Mean crustal density = 2.97+-.07 g/cm^3 Nearside crust. thick.= 58+-8 km Heat flow, Apollo 15 = 3.1+-.6 mW/m^2 Mean angular diameter = 31'05.2" Heat flow, Apollo 17 = 2.2+-.5 mW/m^2 Sid. rot. rate, rad/s = 0.0000026617 Geometric Albedo = 0.12 Mean solar day = 29.5306 d Obliquity to orbit = 6.67 deg Orbit period = 27.321582 d Semi-major axis, a = 384400 km Eccentricity = 0.05490 Mean motion, rad/s = 2.6616995x10^-6 Inclination = 5.145 deg Apsidal period = 3231.50 d Nodal period = 6798.38 d Perihelion Aphelion Mean Solar Constant (W/m^2) 1414+-7 1323+-7 1368+-7 Maximum Planetary IR (W/m^2) 1314 1226 1268 Minimum Planetary IR (W/m^2) 5.2 5.2 5.2 ******************************************************************************** ******************************************************************************* Ephemeris / API_USER Sun Sep 6 10:36:41 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Moon (301) {source: DE441} Center body name: Earth (399) {source: DE441} Center-site name: (user defined site below) ******************************************************************************* Start time : A.D. 2026-Sep-01 00:00:00.0000 UT-05:00 Stop time : A.D. 2026-Sep-30 00:00:01.0000 UT-05:00 Step-size : 1440 minutes ******************************************************************************* Target pole/equ : MOON_ME {East-longitude positive} Target radii : 1737.4, 1737.4, 1737.4 km {Equator_a, b, pole_c} Center geodetic : 283.003509, 42.868473, 0.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 283.003509,4681.90607,4316.80414 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Earth Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian Time zone : UT-05:00 EOP file : eop.260904.p261201 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-04. PREDICTS-> 2026-NOV-30 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) Table format : Comma Separated Values (spreadsheet) ********************************************************************************************************************** Date_(ZONE)_HR:MN:SS, , , R.A.__(a-app), DEC_(a-app), delta, Azi_(a-app), Elev_(a-app), APmag, S-brt ********************************************************************************************************************** $$SOE 2026-Sep-01 00:00:00, ,m, 01 40 34.23, +14 32 42.2, 0.00249313922406, 110.744264, 41.061481, -11.444, 4.500 2026-Sep-02 00:00:00, ,m, 02 34 33.77, +19 43 56.2, 0.00247925329565, 95.630216, 35.606047, -11.085, 4.741 2026-Sep-03 00:00:00, ,m, 03 32 23.95, +23 50 48.1, 0.00246907249177, 82.710388, 28.287541, -10.686, 4.978 2026-Sep-04 00:00:00, ,m, 04 33 51.15, +26 30 57.0, 0.00246264354862, 71.637384, 19.673161, -10.232, 5.218 2026-Sep-05 00:00:00, ,m, 05 37 39.47, +27 26 43.9, 0.00246017216731, 61.854507, 10.215953, -9.705, 5.470 2026-Sep-06 00:00:00, ,m, 06 41 42.67, +26 30 31.5, 0.00246205810181, 52.799250, 0.270393, -9.082, 5.737 2026-Sep-07 00:00:00, , , 07 43 49.36, +23 47 45.4, 0.00246882634147, 43.936966, -9.860134, -8.340, 6.013 2026-Sep-08 00:00:00, , , 08 42 31.98, +19 35 15.0, 0.00248096489889, 34.721854, -19.874309, -7.454, 6.267 2026-Sep-09 00:00:00, , , 09 37 25.57, +14 16 15.4, 0.00249871053942, 24.534932, -29.424653, -6.401, 6.396 2026-Sep-10 00:00:00, , , 10 28 55.40, +08 15 27.6, 0.00252184465271, 12.638155, -38.063565, -5.169, 6.008 2026-Sep-11 00:00:00, , , 11 17 54.24, +01 55 53.2, 0.00254956222581, 358.248271, -45.186240, -4.157, 3.751 2026-Sep-12 00:00:00, , , 12 05 24.30, -04 22 19.8, 0.00258045471550, 340.973818, -50.026880, -5.348, 6.161 2026-Sep-13 00:00:00, , , 12 52 26.64, -10 22 03.6, 0.00261261144614, 321.695424, -51.865855, -6.428, 6.393 2026-Sep-14 00:00:00, , , 13 39 55.23, -15 48 45.5, 0.00264381050715, 302.766143, -50.488485, -7.322, 6.262 2026-Sep-15 00:00:00, , , 14 28 32.29, -20 29 55.0, 0.00267175264087, 286.364440, -46.392778, -8.065, 6.044 2026-Sep-16 00:00:00, , , 15 18 43.23, -24 14 41.0, 0.00269429323488, 273.109595, -40.398367, -8.690, 5.811 2026-Sep-17 00:00:00, , , 16 10 31.32, -26 53 52.2, 0.00270964147574, 262.516896, -33.201572, -9.224, 5.586 2026-Sep-18 00:00:00, , , 17 03 35.03, -28 20 27.1, 0.00271651222936, 253.839216, -25.250954, -9.691, 5.373 2026-Sep-19 00:00:00, , , 17 57 11.53, -28 30 21.6, 0.00271422843231, 246.425668, -16.800615, -10.109, 5.170 2026-Sep-20 00:00:00, , , 18 50 28.30, -27 23 07.6, 0.00270277739230, 239.767911, -7.986807, -10.492, 4.972 2026-Sep-21 00:00:00, ,m, 19 42 39.01, -25 01 56.7, 0.00268282429773, 233.452813, 1.114069, -10.854, 4.773 2026-Sep-22 00:00:00, ,m, 20 33 16.61, -21 33 06.9, 0.00265568267426, 227.098551, 10.443349, -11.203, 4.567 2026-Sep-23 00:00:00, ,m, 21 22 18.81, -17 05 13.0, 0.00262323710050, 220.283577, 19.923085, -11.546, 4.347 2026-Sep-24 00:00:00, ,m, 22 10 06.51, -11 48 32.7, 0.00258781102484, 212.454381, 29.411511, -11.888, 4.107 2026-Sep-25 00:00:00, ,m, 22 57 18.83, -05 55 01.6, 0.00255197510634, 202.790926, 38.632636, -12.234, 3.842 2026-Sep-26 00:00:00, ,m, 23 44 47.84, +00 21 23.9, 0.00251830185613, 190.045582, 47.049510, -12.578, 3.552 2026-Sep-27 00:00:00, ,m, 00 33 33.94, +06 44 10.5, 0.00248909077760, 172.645428, 53.661676, -12.601, 3.555 2026-Sep-28 00:00:00, ,m, 01 24 40.28, +12 53 35.8, 0.00246610971175, 150.165661, 56.926782, -12.291, 3.857 2026-Sep-29 00:00:00, ,m, 02 19 03.28, +18 26 45.7, 0.00245041151982, 126.155489, 55.551054, -11.961, 4.143 2026-Sep-30 00:00:00, ,m, 03 17 15.86, +22 58 35.6, 0.00244227792899, 105.912344, 49.841550, -11.610, 4.411 $$EOE ********************************************************************************************************************** Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: A time-zone correction has been requested. See header. NOTE: "n.a." in output means quantity "not available" at the print-time. SOLAR PRESENCE (OBSERVING SITE) Time tag is followed by a blank, then a solar-presence symbol: '*' Daylight (refracted solar upper-limb on or above apparent horizon) 'C' Civil twilight/dawn 'N' Nautical twilight/dawn 'A' Astronomical twilight/dawn ' ' Night OR geocentric ephemeris LUNAR PRESENCE (OBSERVING SITE) The solar-presence symbol is immediately followed by a lunar-presence symbol: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric ephemeris 'R.A.__(a-app), DEC_(a-app),' = Airless apparent right ascension and declination of the target center with respect to an instantaneous reference frame defined by the Earth equator of-date (z-axis) and meridian containing the Earth equinox of-date (x-axis EOP-corrected IAU76/80). Compensated for down-leg light-time delay gravitational deflection of light, stellar aberration, precession & nutation. Note: equinox (RA origin) is offset -53 mas from the of-date frame defined by the IAU06/00a P & N system. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'delta,' = Apparent range ("delta", light-time aberrated) of the target center relative to the observer. Units: AU 'Azi_(a-app), Elev_(a-app),' = Airless apparent azimuth and elevation of target center. Compensated for light-time, the gravitational deflection of light, stellar aberration precession and nutation. Azimuth is measured clockwise from north: North(0) -> East(90) -> South(180) -> West(270) -> North (360) Elevation angle is with respect to a plane perpendicular to the reference surface local zenith direction. TOPOCENTRIC ONLY. Units: DEGREES 'APmag, S-brt,' = Moon's approximate apparent visual magnitude and surface brightness. When phase angle < 7 deg (within ~1 day of full Moon), computed magnitude tends to be about 0.12 too small. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Inquiries : Jon.D.Giorgini@jpl.nasa.gov **********************************************************************************************************************
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NOTE: This ephemeris replaces the older DE405 ephemeris model and uses the newer official NASA/JPL Horizons API to perform the ephemeris computations for im- proved accuracy.
PHP Program by Jay Tanner of Geneva, NY, USA
v1.10 - Revised: 1970-January-01-Thursday at Time 00:00:00 (UTC)