******************************************************************************* JPL/HORIZONS 162173 Ryugu (1999 JU3) 2024-May-08 08:20:22 Rec #: 162173 (+COV) Soln.date: 2024-Feb-14_06:06:44 # obs: 5013 (1986-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458317.5 ! 2018-Jul-18.00 (TDB) Residual RMS= .19303 EC= .1902742699570587 QR= .9632147777734336 TP= 2458271.6245961036 OM= 251.5892191896012 W= 211.4356445150522 IN= 5.884022618671474 A= 1.189556836389962 MA= 34.85027255486859 ADIST= 1.415898895006491 PER= 1.29744 N= .759672277 ANGMOM= .018419021 DAN= 1.36869 DDN= .98636 L= 102.8903431 B= -3.0648265 MOID= .00015085 TP= 2018-Jun-02.1245961036 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 3.E-8 RAD= .448 ROTPER= 7.63262 H= 19.55 G= .150 B-V= n.a. ALBEDO= .045 STYP= Cb Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 0. A2= -2.483441448931E-14 A3= 0. Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 5.093 R0= 1. ASTEROID comments: 1: soln ref.= JPL#255, PHA OCC=0 radar( 2 delay, 0 Dop.) 2: source=ORB; Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 8 08:20:22 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 162173 Ryugu (1999 JU3) {source: JPL#255} Center body name: Earth (399) {source: DE441} Center-site name: Kushiro ******************************************************************************* Start time : A.D. 2019-Nov-16 08:59:00.0000 UT Stop time : A.D. 2019-Nov-27 08:59:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Center geodetic : 144.59, 43.0781806, .132201 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 144.59, 4666.12214, 4333.94007 {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} Small perturbers: Yes {source: SB441-N16} Output units : KM-S Calendar mode : Mixed Julian/Gregorian Output type : GEOMETRIC cartesian states Output format : 6 (LT, range, and range-rate) EOP file : eop.240507.p240731 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-07. PREDICTS-> 2024-JUL-30 Reference frame : Ecliptic of J2000.0 ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2458317.5 ! 2018-Jul-18.00 (TDB) Residual RMS= .19303 EC= .1902742699570587 QR= .9632147777734336 TP= 2458271.6245961036 OM= 251.5892191896012 W= 211.4356445150522 IN= 5.884022618671474 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-9.064524183289211E-01 Y= 4.633379692539553E-01 Z= 8.795172053318673E-02 VX=-1.021372375311463E-02 VY=-1.358581761722544E-02 VZ=-6.445573135931172E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= 3.E-8 RAD= .448 ROTPER= 7.63262 H= 19.55 G= .150 B-V= n.a. ALBEDO= .045 STYP= Cb Asteroid non-gravitational force model (AMRAT= m^2/kg;A1,A2,A3=au/d^2;R0=au): AMRAT= 0. A1= 0. A2= -2.483441448931E-14 A3= 0. Non-standard or simulated/proxy model: ALN= 1. NK= 0. NM= 2. NN= 5.093 R0= 1. ******************************************************************************* JDUT , Calendar Date (UT ), LT, RG, RR, ************************************************************************************************************************** $$SOE 2458803.874305556, A.D. 2019-Nov-16 08:59:00.0000, 8.443538702532214E+02, 2.531309221850263E+08, 2.982474722813508E+00, 2458804.874305556, A.D. 2019-Nov-17 08:59:00.0000, 8.451424730189217E+02, 2.533673393465412E+08, 2.928585178673130E+00, 2458805.874305556, A.D. 2019-Nov-18 08:59:00.0000, 8.459154427855995E+02, 2.535990698528532E+08, 2.872428275217146E+00, 2458806.874305556, A.D. 2019-Nov-19 08:59:00.0000, 8.466721296773949E+02, 2.538259188760809E+08, 2.814019029459892E+00, 2458807.874305556, A.D. 2019-Nov-20 08:59:00.0000, 8.474118925893619E+02, 2.540476942177968E+08, 2.753404925375692E+00, 2458808.874305556, A.D. 2019-Nov-21 08:59:00.0000, 8.481341090599649E+02, 2.542642092687269E+08, 2.690669248550095E+00, 2458809.874305556, A.D. 2019-Nov-22 08:59:00.0000, 8.488381858569184E+02, 2.544752861823064E+08, 2.625932426925101E+00, 2458810.874305556, A.D. 2019-Nov-23 08:59:00.0000, 8.495235694239063E+02, 2.546807590065265E+08, 2.559349334463691E+00, 2458811.874305556, A.D. 2019-Nov-24 08:59:00.0000, 8.501897546995566E+02, 2.548804763277971E+08, 2.491100411531209E+00, 2458812.874305556, A.D. 2019-Nov-25 08:59:00.0000, 8.508362903851786E+02, 2.550743028501745E+08, 2.421376037964168E+00, 2458813.874305556, A.D. 2019-Nov-26 08:59:00.0000, 8.514627789932173E+02, 2.552621194098874E+08, 2.350356639640580E+00, 2458814.874305556, A.D. 2019-Nov-27 08:59:00.0000, 8.520688711628078E+02, 2.554438212711835E+08, 2.278193820558826E+00, $$EOE ************************************************************************************************************************** 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" atomic 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 discontinuous civil UT time-scale 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, a condition noted here as "UT~". Future but as yet undetermined leap-seconds can be expected to change time-tags in the "UT~" interval and, in general, the UT scale may not be suitable for purposes that assume time-tag continuity in the ephemeris. Output in continuous TDB and TT timescales may instead be requested, though these are not linked to Earth's rotation. 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. 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. REFERENCE FRAME AND COORDINATES Ecliptic at the standard reference epoch Reference epoch: J2000.0 X-Y plane: adopted Earth orbital plane at the reference epoch Note: IAU76 obliquity of 84381.448 arcseconds wrt ICRF X-Y plane X-axis : ICRF Z-axis : perpendicular to the X-Y plane in the directional (+ or -) sense of Earth's north pole at the reference epoch. Symbol meaning: JDUT Julian Day Number, Universal Time LT One-way down-leg Newtonian light-time (sec) RG Range; distance from coordinate center (km) RR Range-rate; radial velocity wrt coord. center (km/sec) ABERRATIONS AND CORRECTIONS Geometric state vectors have NO corrections or aberrations applied. 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 ******************************************************************************* !$$SOF COMMAND = 'Ryugu' CENTER = '399' OBJ_DATA = 'yes' MAKE_EPHEM = 'yes' TABLE_TYPE = 'VECTORS' REF_PLANE = 'ECLIPTIC' COORD_TYPE = 'GEODETIC' SITE_COORD = '' START_TIME = '2019/11/16 8:59' STOP_TIME = '2019/11/27 8:59' STEP_SIZE = '1d' TLIST = QUANTITIES = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43' FIXED_QUANTITIES = 'A' REF_SYSTEM = 'J2000' OUT_UNITS = 'KM-S' VECT_TABLE = '6' VECT_CORR = 'NONE' CAL_FORMAT = 'CAL' ANG_FORMAT = 'HMS' APPARENT = 'AIRLESS' TIME_TYPE = 'UTC' TIME_DIGITS = 'MINUTES' TIME_ZONE = '' RANGE_UNITS = 'AU' SUPPRESS_RANGE_RATE = 'no' ELEV_CUT = '' SKIP_DAYLT = 'no' SOLAR_ELONG = '' AIRMASS = '' EXTRA_PREC = 'yes' CSV_FORMAT = 'yes' VEC_LABELS = 'yes' ELM_LABELS = 'yes' TP_TYPE = 'ABSOLUTE' R_T_S_ONLY = 'NO' CA_TABLE_TYPE = 'STANDARD' TCA3SG_LIMIT = '' EMAIL_ADDR = '' CALIM_SB = ''