API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Oct 20, 2022 Lucy Centaur RB Booster (spacecraft) / Sun -490 BACKGROUND: This trajectory solution is for the Lucy spacecraft Centaur stage and includes measurements from the 2022 flyby recovery by ATLAS (W68). The close approach was 2022-Oct-16 06:58:47 UTC, 9097.287 from the geocenter over the North Atlantic (299.531798 deg. E, 27.065258 deg. N), a point about 683 km SSE of Bermuda, 1985 km east of the Cape Canaveral launch site. The next Earth approach is expected to be 2024-Nov-08, at 0.04 au. "-490" is an unofficial SPK ID number and may be changed in the future The Lucy spacecraft itself is accessed under spacecraft ID -49. Launched: October 16, 2021 @ 09:34 UTC DESCRIPTION: This solution #57 includes a spinning gas jet model based on a fit to 92 ground-based optical measurements over 2021-Oct-20.9 to 2022-Oct-19.1. Developed by D. Farnocchia (JPL) 2022-Oct-19. Heliocentric IAU76/J2000 ecliptic osculating elements (au, days and degrees): EPOCH= 2459532.5 EC= .1620613117287741 QR= .8378114070561726 TP= 2459422.963016516633 OM= 201.9690340568685 W = 82.5604601618937 IN= .1344952893048388 H= 26.756 RMSH= .34288 Non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. DT= 0. A1= 0. A2= 0. A3= 0. AJ1= 1.776971075868233E-8 ET1= 82.89783500070268 ALF= 152.0807777094847 DEL= 76.12952671882672 Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 0. R0= 1. EOBL_LIM= .01 SOBL_LIM= 0. Name Start (TDB) End (TDB) ------------------- ----------------- ----------------- 2021-093B-57_1 2021-Oct-20 00:00 2022-Oct-11 00:00 2021-093B-57_2 2022-Oct-11 00:00 2022-Oct-21 00:00 2021-093B-57_3 2022-Oct-21 00:00 2050-Jan-03 00:00 ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Tue May 13 10:01:01 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: Lucy Centaur RB Booster (spacecraft) (-490) {source: Lucy_centaur_s57_DE440} Center body name: Earth (399) {source: Lucy_centaur_s57_DE440} Center-site name: El Berrueco ******************************************************************************* Start time : A.D. 2024-Oct-31 00:00:00.0000 UT Stop time : A.D. 2024-Nov-01 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 356.4134, 40.8833094, 1.06361 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 356.4134,4829.88693,4153.33056 {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: Lucy_centaur_s57_DE4 Rel. light bend : Sun {source: Lucy_centaur_s57_DE4 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 RTS-only print : NO EOP file : eop.250512.p250808 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-MAY-12. PREDICTS-> 2025-AUG-07 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation ( 0.0deg=YES),Airmass (>38.000=NO), Daylight (YES) Table cut-offs 2: Solar elongation ( 12.0,180.0=YES),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) *************************************************************************************************************************************************************************************************************************************************** Date__(UT)__HR:MN R.A._____(ICRF)_____DEC Azi____(a-app)___Elev APmag S-brt r rdot delta deldot S-O-T /r S-T-O T-O-M/MN_Illu% RA_3sigma DEC_3sigma Sky_motion Sky_mot_PA RelVel-ANG *************************************************************************************************************************************************************************************************************************************************** $$SOE >..... Elevation Cut-off Requested .....< 2024-Oct-31 00:40 09 26 16.54 +06 05 24.7 81.773619 -0.342560 n.a. n.a. 0.981681923302 -3.0050903 0.05114736857612 -4.2560772 75.9323 /L 101.1698 59.9/ 1.9518 n.a. n.a. 8.2451853 121.11685 -39.85952 2024-Oct-31 00:50 09 26 21.27 +06 04 42.2 83.408106 1.514299 n.a. n.a. 0.981669868205 -3.0062143 0.05113030106357 -4.2554005 75.9171 /L 101.1861 60.0/ 1.9279 n.a. n.a. 8.2294791 121.20685 -39.91821 2024-Oct-31 01:00 09 26 25.99 +06 03 59.6 85.037067 3.377376 n.a. n.a. 0.981657808598 -3.0073383 0.05111323757922 -4.2540680 75.9020 /L 101.2023 60.1/ 1.9044 n.a. n.a. 8.2137833 121.29817 -39.97263 2024-Oct-31 01:10 09 26 30.69 +06 03 17.0 86.663938 5.245138 n.a. n.a. 0.981645744484 -3.0084623 0.05109618075585 -4.2520786 75.8869 /L 101.2185 60.2/ 1.8811 n.a. n.a. 8.1981377 121.39063 -40.02264 2024-Oct-31 01:20 09 26 35.38 +06 02 34.4 88.292193 7.116061 n.a. n.a. 0.981633675862 -3.0095863 0.05107913322802 -4.2494325 75.8719 /L 101.2347 60.3/ 1.8580 n.a. n.a. 8.1825821 121.48407 -40.06808 2024-Oct-31 01:30 09 26 40.05 +06 01 51.8 89.925359 8.988623 n.a. n.a. 0.981621602732 -3.0107104 0.05106209762704 -4.2461310 75.8569 /L 101.2508 60.3/ 1.8353 n.a. n.a. 8.1671560 121.57832 -40.10882 2024-Oct-31 01:40 09 26 44.72 +06 01 09.1 91.567042 10.861290 n.a. n.a. 0.981609525093 -3.0118344 0.05104507657614 -4.2421769 75.8420 /L 101.2668 60.4/ 1.8128 n.a. n.a. 8.1518985 121.67319 -40.14473 2024-Oct-31 01:50 09 26 49.36 +06 00 26.4 93.220941 12.732504 n.a. n.a. 0.981597442947 -3.0129583 0.05102807268542 -4.2375739 75.8271 /L 101.2828 60.5/ 1.7907 n.a. n.a. 8.1368484 121.76850 -40.17566 2024-Oct-31 02:00 09 26 54.00 +05 59 43.6 94.890876 14.600667 n.a. n.a. 0.981585356293 -3.0140823 0.05101108854705 -4.2323273 75.8123 /L 101.2988 60.6/ 1.7688 n.a. n.a. 8.1220439 121.86407 -40.20151 2024-Oct-31 02:10 09 26 58.62 +05 59 00.8 96.580810 16.464133 n.a. n.a. 0.981573265130 -3.0152063 0.05099412673033 -4.2264432 75.7975 /L 101.3146 60.7/ 1.7473 n.a. n.a. 8.1075229 121.95972 -40.22215 2024-Oct-31 02:20 09 27 03.23 +05 58 18.0 98.294868 18.321191 n.a. n.a. 0.981561169460 -3.0163303 0.05097718977684 -4.2199293 75.7828 /L 101.3305 60.7/ 1.7261 n.a. n.a. 8.0933223 122.05525 -40.23748 2024-Oct-31 02:30 09 27 07.83 +05 57 35.1 100.037371 20.170047 n.a. n.a. 0.981549069282 -3.0174543 0.05096028019575 -4.2127941 75.7681 /L 101.3463 60.8/ 1.7052 n.a. n.a. 8.0794786 122.15046 -40.24742 2024-Oct-31 02:40 09 27 12.41 +05 56 52.2 101.812851 22.008811 n.a. n.a. 0.981536964597 -3.0185783 0.05094340045899 -4.2050476 75.7534 /L 101.3620 60.9/ 1.6846 n.a. n.a. 8.0660274 122.24517 -40.25185 2024-Oct-31 02:50 09 27 16.98 +05 56 09.3 103.626088 23.835476 n.a. n.a. 0.981524855404 -3.0197022 0.05092655299663 -4.1967008 75.7388 /L 101.3777 61.0/ 1.6644 n.a. n.a. 8.0530035 122.33918 -40.25072 2024-Oct-31 03:00 09 27 21.54 +05 55 26.3 105.482125 25.647899 n.a. n.a. 0.981512741703 -3.0208262 0.05090974019239 -4.1877657 75.7243 /L 101.3934 61.0/ 1.6445 n.a. n.a. 8.0404409 122.43228 -40.24394 2024-Oct-31 03:10 09 27 26.09 +05 54 43.2 107.386299 27.443780 n.a. n.a. 0.981500623494 -3.0219502 0.05089296437898 -4.1782557 75.7098 /L 101.4090 61.1/ 1.6249 n.a. n.a. 8.0283724 122.52429 -40.23146 2024-Oct-31 03:20 09 27 30.62 +05 54 00.2 109.344261 29.220640 n.a. n.a. 0.981488500778 -3.0230741 0.05087622783385 -4.1681850 75.6953 /L 101.4246 61.2/ 1.6056 n.a. n.a. 8.0168300 122.61500 -40.21322 2024-Oct-31 03:30 09 27 35.15 +05 53 17.0 111.361994 30.975789 n.a. n.a. 0.981476373554 -3.0241981 0.05085953277486 -4.1575691 75.6808 /L 101.4401 61.3/ 1.5867 n.a. n.a. 8.0058445 122.70421 -40.18919 2024-Oct-31 03:40 09 27 39.66 +05 52 33.9 113.445827 32.706308 n.a. n.a. 0.981464241823 -3.0253220 0.05084288135605 -4.1464244 75.6664 /L 101.4556 61.3/ 1.5682 n.a. n.a. 7.9954458 122.79174 -40.15934 2024-Oct-31 03:50 09 27 44.16 +05 51 50.6 115.602434 34.409009 n.a. n.a. 0.981452105584 -3.0264459 0.05082627566362 -4.1347683 75.6521 /L 101.4711 61.4/ 1.5500 n.a. n.a. 7.9856623 122.87739 -40.12365 2024-Oct-31 04:00 09 27 48.66 +05 51 07.4 117.838829 36.080413 n.a. n.a. 0.981439964838 -3.0275699 0.05080971771201 -4.1226192 75.6377 /L 101.4865 61.5/ 1.5321 n.a. n.a. 7.9765213 122.96096 -40.08211 2024-Oct-31 04:10 09 27 53.14 +05 50 24.0 120.162338 37.716710 n.a. n.a. 0.981427819585 -3.0286938 0.05079320944005 -4.1099963 75.6234 /L 101.5019 61.5/ 1.5146 n.a. n.a. 7.9680491 123.04228 -40.03473 2024-Oct-31 04:20 09 27 57.62 +05 49 40.7 122.580546 39.313731 n.a. n.a. 0.981415669824 -3.0298177 0.05077675270741 -4.0969199 75.6091 /L 101.5173 61.6/ 1.4974 n.a. n.a. 7.9602704 123.12115 -39.98152 2024-Oct-31 04:30 09 28 02.09 +05 48 57.2 125.101219 40.866912 n.a. n.a. 0.981403515556 -3.0309416 0.05076034929092 -4.0834110 75.5949 /L 101.5326 61.7/ 1.4805 n.a. n.a. 7.9532085 123.19740 -39.92252 2024-Oct-31 04:40 09 28 06.55 +05 48 13.8 127.732179 42.371270 n.a. n.a. 0.981391356781 -3.0320656 0.05074400088135 -4.0694916 75.5807 /L 101.5479 61.7/ 1.4640 n.a. n.a. 7.9468857 123.27084 -39.85776 2024-Oct-31 04:50 09 28 11.00 +05 47 30.3 130.481135 43.821371 n.a. n.a. 0.981379193498 -3.0331895 0.05072770908024 -4.0551842 75.5664 /L 101.5632 61.8/ 1.4479 n.a. n.a. 7.9413226 123.34133 -39.78729 2024-Oct-31 05:00 09 28 15.45 +05 46 46.7 133.355455 45.211322 n.a. n.a. 0.981367025709 -3.0343134 0.05071147539678 -4.0405122 75.5522 /L 101.5785 61.8/ 1.4321 n.a. n.a. 7.9365384 123.40868 -39.71118 2024-Oct-31 05:10 09 28 19.89 +05 46 03.1 136.361861 46.534763 n.a. n.a. 0.981354853412 -3.0354373 0.05069530124498 -4.0254997 75.5381 /L 101.5937 61.9/ 1.4166 n.a. n.a. 7.9325510 123.47275 -39.62952 2024-Oct-31 05:20 A 09 28 24.33 +05 45 19.4 139.506059 47.784890 n.a. n.a. 0.981342676608 -3.0365612 0.05067918794109 -4.0101714 75.5239 /L 101.6090 62.0/ 1.4014 n.a. n.a. 7.9293767 123.53338 -39.54238 2024-Oct-31 05:30 A 09 28 28.76 +05 44 35.6 142.792287 48.954489 n.a. n.a. 0.981330495297 -3.0376851 0.05066313670107 -3.9945527 75.5097 /L 101.6242 62.0/ 1.3866 n.a. n.a. 7.9270303 123.59044 -39.44987 2024-Oct-31 05:40 Am 09 28 33.18 +05 43 51.9 146.222796 50.036018 n.a. n.a. 0.981318309479 -3.0388090 0.05064714863824 -3.9786692 75.4956 /L 101.6394 62.1/ 1.3721 n.a. n.a. 7.9255252 123.64380 -39.35212 2024-Oct-31 05:50 Nm 09 28 37.61 +05 43 08.0 149.797285 51.021710 n.a. n.a. 0.981306119154 -3.0399328 0.05063122476127 -3.9625475 75.4815 /L 101.6546 62.1/ 1.3579 n.a. n.a. 7.9248731 123.69332 -39.24924 2024-Oct-31 06:00 Nm 09 28 42.03 +05 42 24.1 153.512328 51.903735 n.a. n.a. 0.981293924321 -3.0410567 0.05061536597223 -3.9462143 75.4673 /L 101.6698 62.2/ 1.3441 n.a. n.a. 7.9250844 123.73891 -39.14138 2024-Oct-31 06:10 Nm 09 28 46.45 +05 41 40.2 157.360853 52.674393 n.a. n.a. 0.981281724982 -3.0421806 0.05059957306493 -3.9296968 75.4532 /L 101.6849 62.2/ 1.3305 n.a. n.a. 7.9261678 123.78045 -39.02869 2024-Oct-31 06:20 Cm 09 28 50.87 +05 40 56.2 161.331746 53.326357 n.a. n.a. 0.981269521136 -3.0433044 0.05058384672336 -3.9130225 75.4390 /L 101.7001 62.3/ 1.3173 n.a. n.a. 7.9281304 123.81785 -38.91134 2024-Oct-31 06:30 Cm 09 28 55.28 +05 40 12.1 165.409655 53.852944 n.a. n.a. 0.981257312783 -3.0444283 0.05056818752053 -3.8962193 75.4249 /L 101.7153 62.3/ 1.3044 n.a. n.a. 7.9309780 123.85103 -38.78951 >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< $$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: "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) 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. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. 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} 'Azi____(a-app)___Elev' = 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' = The targets' approximate apparent visual magnitude and surface brightness. For planets and natural satellites, output is restricted to solar phase angles covered by observational data. Outside the observed phase angle range, "n.a." may be output to avoid extrapolation beyond the limit of model validity. 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. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'S-T-O' = The Sun-Target-Observer angle; the interior vertex angle at target center formed by a vector from the target to the apparent center of the Sun (at reflection time on the target) and the apparent vector from target to the observer at print-time. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the down-leg from target to observer. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'RA_3sigma DEC_3sigma' = Uncertainty in Right-Ascension and Declination. Output values are the formal +/- 3 standard-deviations (sigmas) around nominal position. Units: ARCSECONDS 'Sky_motion Sky_mot_PA RelVel-ANG' = Total apparent angular rate of the target in the plane-of-sky. "Sky_mot_PA" is the position angle of the target's direction of motion in the plane-of-sky, measured counter-clockwise from the apparent of-date north pole direction. "RelVel-ANG" is the flight path angle of the target's relative motion with respect to the observer's line-of-sight, in the range [-90,+90], where positive values indicate motion away from the observer, negative values are toward the observer: -90 = target is moving directly toward the observer 0 = target is moving at right angles to the observer's line-of-sight +90 = target is moving directly away from the observer UNITS: ARCSECONDS/MINUTE, DEGREES, DEGREES 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 Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************