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 Mon Nov 4 03:39:36 2024 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: SATINO Remote Observatory, Haute Provence ******************************************************************************* 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 : 5.7124, 43.9320269, .703985 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 5.7124, 4601.22659, 4403.14405 {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.241101.p250128 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-NOV-01. PREDICTS-> 2025-JAN-27 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 2024-Oct-31 00:00 09 25 57.34 +06 08 10.0 81.284034 -0.335829 n.a. n.a. 0.981730098556 -3.0005941 0.05121017422733 -4.2465960 75.9940 /L 101.1039 59.7/ 2.0256 n.a. n.a. 8.2285050 121.11305 -39.81916 2024-Oct-31 00:10 09 26 02.06 +06 07 27.6 83.015939 1.430274 n.a. n.a. 0.981718061492 -3.0017182 0.05119314451912 -4.2460339 75.9788 /L 101.1201 59.8/ 2.0016 n.a. n.a. 8.2138074 121.19869 -39.87519 2024-Oct-31 00:20 09 26 06.77 +06 06 45.1 84.742533 3.203015 n.a. n.a. 0.981706019919 -3.0028422 0.05117611831642 -4.2448475 75.9637 /L 101.1363 59.9/ 1.9779 n.a. n.a. 8.1991096 121.28560 -39.92718 2024-Oct-31 00:30 09 26 11.47 +06 06 02.7 86.467116 4.980755 n.a. n.a. 0.981693973838 -3.0039662 0.05115909812649 -4.2430352 75.9487 /L 101.1525 59.9/ 1.9544 n.a. n.a. 8.1844495 121.37362 -39.97499 2024-Oct-31 00:40 09 26 16.15 +06 05 20.1 88.193021 6.761867 n.a. n.a. 0.981681923249 -3.0050903 0.05114208645944 -4.2405972 75.9337 /L 101.1686 60.0/ 1.9312 n.a. n.a. 8.1698649 121.46260 -40.01848 2024-Oct-31 00:50 09 26 20.82 +06 04 37.6 89.923634 8.544721 n.a. n.a. 0.981669868152 -3.0062143 0.05112508582359 -4.2375342 75.9188 /L 101.1847 60.1/ 1.9082 n.a. n.a. 8.1553934 121.55238 -40.05750 2024-Oct-31 01:00 09 26 25.48 +06 03 55.0 91.662410 10.327679 n.a. n.a. 0.981657808547 -3.0073383 0.05110809872071 -4.2338487 75.9039 /L 101.2007 60.2/ 1.8856 n.a. n.a. 8.1410724 121.64278 -40.09193 2024-Oct-31 01:10 09 26 30.12 +06 03 12.4 93.412882 12.109074 n.a. n.a. 0.981645744434 -3.0084623 0.05109112764133 -4.2295439 75.8890 /L 101.2167 60.3/ 1.8632 n.a. n.a. 8.1269388 121.73363 -40.12164 2024-Oct-31 01:20 09 26 34.76 +06 02 29.7 95.178685 13.887209 n.a. n.a. 0.981633675812 -3.0095863 0.05107417506009 -4.2246245 75.8742 /L 101.2326 60.3/ 1.8411 n.a. n.a. 8.1130291 121.82476 -40.14652 2024-Oct-31 01:30 09 26 39.38 +06 01 47.0 96.963568 15.660335 n.a. n.a. 0.981621602683 -3.0107104 0.05105724343100 -4.2190961 75.8595 /L 101.2485 60.4/ 1.8193 n.a. n.a. 8.0993794 121.91600 -40.16645 2024-Oct-31 01:40 09 26 43.98 +06 01 04.3 98.771412 17.426643 n.a. n.a. 0.981609525046 -3.0118344 0.05104033518293 -4.2129656 75.8447 /L 101.2643 60.5/ 1.7979 n.a. n.a. 8.0860252 122.00715 -40.18134 2024-Oct-31 01:50 09 26 48.58 +06 00 21.5 100.606249 19.184248 n.a. n.a. 0.981597442900 -3.0129584 0.05102345271498 -4.2062410 75.8301 /L 101.2801 60.6/ 1.7767 n.a. n.a. 8.0730013 122.09803 -40.19109 2024-Oct-31 02:00 09 26 53.16 +05 59 38.7 102.472276 20.931174 n.a. n.a. 0.981585356247 -3.0140823 0.05100659839198 -4.1989313 75.8154 /L 101.2958 60.6/ 1.7559 n.a. n.a. 8.0603418 122.18847 -40.19563 2024-Oct-31 02:10 09 26 57.73 +05 58 55.8 104.373870 22.665337 n.a. n.a. 0.981573265087 -3.0152063 0.05098977454001 -4.1910468 75.8008 /L 101.3115 60.7/ 1.7354 n.a. n.a. 8.0480800 122.27827 -40.19486 2024-Oct-31 02:20 09 27 02.29 +05 58 13.0 106.315606 24.384531 n.a. n.a. 0.981561169418 -3.0163303 0.05097298344208 -4.1825988 75.7863 /L 101.3272 60.8/ 1.7152 n.a. n.a. 8.0362485 122.36725 -40.18872 2024-Oct-31 02:30 09 27 06.84 +05 57 30.0 108.302266 26.086406 n.a. n.a. 0.981549069242 -3.0174543 0.05095622733377 -4.1735996 75.7718 /L 101.3428 60.9/ 1.6953 n.a. n.a. 8.0248790 122.45522 -40.17716 2024-Oct-31 02:40 09 27 11.38 +05 56 47.0 110.338848 27.768452 n.a. n.a. 0.981536964558 -3.0185783 0.05093950839908 -4.1640626 75.7573 /L 101.3583 60.9/ 1.6758 n.a. n.a. 8.0140019 122.54199 -40.16013 2024-Oct-31 02:50 09 27 15.91 +05 56 04.0 112.430569 29.427975 n.a. n.a. 0.981524855366 -3.0197022 0.05092282876624 -4.1540022 75.7429 /L 101.3739 61.0/ 1.6566 n.a. n.a. 8.0036472 122.62738 -40.13758 2024-Oct-31 03:00 09 27 20.42 +05 55 20.9 114.582859 31.062077 n.a. n.a. 0.981512741667 -3.0208262 0.05090619050377 -4.1434338 75.7285 /L 101.3894 61.1/ 1.6377 n.a. n.a. 7.9938434 122.71121 -40.10949 2024-Oct-31 03:10 09 27 24.93 +05 54 37.8 116.801352 32.667635 n.a. n.a. 0.981500623460 -3.0219502 0.05088959561654 -4.1323737 75.7141 /L 101.4049 61.1/ 1.6192 n.a. n.a. 7.9846180 122.79328 -40.07584 2024-Oct-31 03:20 09 27 29.43 +05 53 54.6 119.091859 34.241278 n.a. n.a. 0.981488500746 -3.0230741 0.05087304604202 -4.1208392 75.6997 /L 101.4203 61.2/ 1.6010 n.a. n.a. 7.9759974 122.87342 -40.03662 2024-Oct-31 03:30 09 27 33.92 +05 53 11.4 121.460324 35.779362 n.a. n.a. 0.981476373524 -3.0241981 0.05085654364659 -4.1088485 75.6854 /L 101.4357 61.3/ 1.5831 n.a. n.a. 7.9680069 122.95145 -39.99184 2024-Oct-31 03:40 09 27 38.40 +05 52 28.2 123.912764 37.277953 n.a. n.a. 0.981464241795 -3.0253220 0.05084009022209 -4.0964206 75.6711 /L 101.4511 61.3/ 1.5656 n.a. n.a. 7.9606704 123.02720 -39.94151 2024-Oct-31 03:50 09 27 42.87 +05 51 44.8 126.455188 38.732805 n.a. n.a. 0.981452105558 -3.0264459 0.05082368748231 -4.0835753 75.6568 /L 101.4664 61.4/ 1.5484 n.a. n.a. 7.9540106 123.10049 -39.88565 2024-Oct-31 04:00 09 27 47.34 +05 51 01.5 129.093473 40.139348 n.a. n.a. 0.981439964814 -3.0275699 0.05080733705991 -4.0703334 75.6426 /L 101.4817 61.5/ 1.5315 n.a. n.a. 7.9480490 123.17116 -39.82430 2024-Oct-31 04:10 09 27 51.80 +05 50 18.1 131.833220 41.492676 n.a. n.a. 0.981427819563 -3.0286938 0.05079104050328 -4.0567160 75.6284 /L 101.4970 61.5/ 1.5150 n.a. n.a. 7.9428058 123.23905 -39.75752 2024-Oct-31 04:20 09 27 56.25 +05 49 34.6 134.679562 42.787551 n.a. n.a. 0.981415669805 -3.0298177 0.05077479927358 -4.0427455 75.6142 /L 101.5123 61.6/ 1.4988 n.a. n.a. 7.9382996 123.30401 -39.68535 2024-Oct-31 04:30 09 28 00.70 +05 48 51.1 137.636934 44.018413 n.a. n.a. 0.981403515539 -3.0309417 0.05075861474203 -4.0284444 75.6000 /L 101.5276 61.6/ 1.4829 n.a. n.a. 7.9345478 123.36588 -39.60788 2024-Oct-31 04:40 A 09 28 05.14 +05 48 07.5 140.708798 45.179404 n.a. n.a. 0.981391356766 -3.0320656 0.05074248818736 -4.0138363 75.5858 /L 101.5428 61.7/ 1.4674 n.a. n.a. 7.9315665 123.42452 -39.52519 2024-Oct-31 04:50 A 09 28 09.58 +05 47 23.9 143.897332 46.264419 n.a. n.a. 0.981379193485 -3.0331895 0.05072642079333 -3.9989450 75.5716 /L 101.5581 61.8/ 1.4521 n.a. n.a. 7.9293701 123.47980 -39.43738 2024-Oct-31 05:00 A 09 28 14.02 +05 46 40.3 147.203088 47.267171 n.a. n.a. 0.981367025698 -3.0343134 0.05071041364650 -3.9837951 75.5574 /L 101.5733 61.8/ 1.4372 n.a. n.a. 7.9279719 123.53160 -39.34454 2024-Oct-31 05:10 Nm 09 28 18.45 +05 45 56.5 150.624639 48.181286 n.a. n.a. 0.981354853403 -3.0354373 0.05069446773426 -3.9684114 75.5433 /L 101.5885 61.9/ 1.4227 n.a. n.a. 7.9273835 123.57980 -39.24682 2024-Oct-31 05:20 Nm 09 28 22.88 +05 45 12.8 154.158249 49.000422 n.a. n.a. 0.981342676602 -3.0365612 0.05067858394291 -3.9528196 75.5291 /L 101.6037 61.9/ 1.4084 n.a. n.a. 7.9276152 123.62428 -39.14432 2024-Oct-31 05:30 Nm 09 28 27.30 +05 44 28.9 157.797576 49.718415 n.a. n.a. 0.981330495293 -3.0376851 0.05066276305600 -3.9370452 75.5150 /L 101.6189 62.0/ 1.3944 n.a. n.a. 7.9286757 123.66495 -39.03721 2024-Oct-31 05:40 Nm 09 28 31.73 +05 43 45.1 161.533483 50.329452 n.a. n.a. 0.981318309477 -3.0388090 0.05064700575291 -3.9211146 75.5008 /L 101.6341 62.0/ 1.3808 n.a. n.a. 7.9305724 123.70171 -38.92562 2024-Oct-31 05:50 Cm 09 28 36.15 +05 43 01.1 165.353969 50.828250 n.a. n.a. 0.981306119154 -3.0399328 0.05063131260745 -3.9050542 75.4866 /L 101.6493 62.1/ 1.3674 n.a. n.a. 7.9333109 123.73449 -38.80974 2024-Oct-31 06:00 Cm 09 28 40.58 +05 42 17.1 169.244276 51.210251 n.a. n.a. 0.981293924325 -3.0410567 0.05061568408698 -3.8888905 75.4725 /L 101.6645 62.1/ 1.3544 n.a. n.a. 7.9368957 123.76321 -38.68974 >..... 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************