API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Ephemeris / API_USER Sat Dec 7 03:15:43 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Moon (301) {source: DE441} Target-point : (user defined coordinates below) Center body name: Earth (399) {source: DE441} Center-site name: Apache Point ******************************************************************************* Start time : A.D. 2024-Feb-03 04:00:00.0000 UT-07:00 Stop time : A.D. 2024-Feb-03 04:01:00.0000 UT-07:00 Step-size : 12 steps ******************************************************************************* Target geodetic : 23.47307, .67344989, -1.92765 {E-lon(deg),Lat(deg),Alt(km)} Target cylindric: 23.47307, 1735.35247, 20.39813 {E-lon(deg),Dxy(km),Dz(km)} Target pole/equ : MEAN_ME (high precision) {East-longitude positive} Target radii : 1737.4, 1737.4, 1737.4 km {Equator_a, b, pole_c} Center geodetic : 254.1794, 32.7805613, 2.79488 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 254.1794,5370.03997,3435.03639 {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: YES (Earth refraction model) RA format : HMS Time format : CAL Calendar mode : Gregorian Time zone : UT-07:00 RTS-only print : NO EOP file : eop.241206.p250304 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-DEC-06. PREDICTS-> 2025-MAR-03 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 ) ******************************************************************************* Date_(ZONE)_HR:MN:SC.fff Azi____(r-app)___Elev 1-way_down_LT ********************************************************************** $$SOE 2024-Feb-03 04:00:00.000 m N- 143.588295 27.029606 0.02153966 2024-Feb-03 04:00:05.000 m N- 143.606569 27.039511 0.02153959 2024-Feb-03 04:00:10.000 m N- 143.624847 27.049412 0.02153951 2024-Feb-03 04:00:15.000 m N- 143.643129 27.059309 0.02153944 2024-Feb-03 04:00:20.000 m N- 143.661417 27.069201 0.02153937 2024-Feb-03 04:00:25.000 m N- 143.679708 27.079088 0.02153930 2024-Feb-03 04:00:30.000 m N- 143.698005 27.088972 0.02153923 2024-Feb-03 04:00:35.000 m N- 143.716306 27.098851 0.02153916 2024-Feb-03 04:00:40.000 m N- 143.734612 27.108725 0.02153909 2024-Feb-03 04:00:45.000 m N- 143.752922 27.118595 0.02153901 2024-Feb-03 04:00:50.000 m N- 143.771237 27.128461 0.02153894 2024-Feb-03 04:00:55.000 m N- 143.789557 27.138323 0.02153887 2024-Feb-03 04:01:00.000 m N- 143.807881 27.148180 0.02153880 $$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 Calendar dates are given in the modern Gregorian system, extended prior to its 1582-Oct-15 adoption. The Gregorian calendar more closely corresponds to physical Earth seasons and orbital motion, but can differ by up to 10 days with historical records made under the prior Julian calendar, more if the Julian calendar was extended prior to its 45-Jan-1 BC adoption to label the historical event. Select "mixed" calendar mode if correlation with historical dates prior to A.D. 1582 is important. 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 condition code: '*' 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 WITH TARGET RISE/TRANSIT/SET EVENT MARKER (OBSERVING SITE) The solar-presence code column is immediately followed by another marker: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric The lunar presence marker (an ongoing state) can be over-ridden by a target event marker if an event has occurred since the last output step: 'r' Rise (target body on or went above cut-off RTS elevation) 'e' Elevation max (target body maximum elevation angle has occurred) 't' Transit (target body at or passed through observer meridian) 's' Set (target body on or went below cut-off RTS elevation) TARGET POINT "NEAR-SIDE" AND ILLUMINATION FLAGS Coordinates on the target body's surface were specified, so the solar/lunar presence markers (observing location) are followed by a blank and then two additional symbols relating to the target surface location. The first symbol indicates if the target surface location is on the side of the target facing the observer: 'N' Surface location on the target body is on the near-side, facing TOWARD the observer. Visible, however, ONLY when target location is also above the horizon at the observing site. '-' Surface location on the target body is on the far-side, facing AWAY FROM the observer. NOT visible. The second symbol indicates if the target surface location is illuminated by any portion of the Sun's extended disk: 'L' Surface location on target body faces Sun (is lit) '-' Surface location on target body does NOT face Sun (is NOT lit) Conditions are checked using the IAU triaxial ellipsoid model for a given target body. Local topography is NOT modelled, nor is atmosphere (if any) nor are eclipses, although this last limitation may be removed in the future. Note that for off-world sites looking toward Earth, the IAU_EARTH rotation model is only accurate to ~0.1 degree at the surface of the Earth (~10 km). RTS MARKERS (TVH) Rise and set are with respect to the reference ellipsoid true visual horizon defined by the elevation cut-off angle. Horizon dip and yellow-light refraction (Earth only) are considered. Accuracy is < or = to twice the requested search step-size. 'Azi____(r-app)___Elev' = Refracted apparent azimuth and elevation of SURFACE TARGET POINT. Compensated for light-time, the gravitational deflection of light, stellar aberration, approximate atmospheric yellow-light refraction, 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 '1-way_down_LT' = 1-way down-leg light-time from SURFACE POINT target to observer. The elapsed time since light (observed at print-time) would have left or reflected off the specified target surface location. Units: MINUTES 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov *******************************************************************************