******************************************************************************* JPL/HORIZONS (2023 BU) 2024-May-05 23:12:18 Rec #:50653470 (+COV) Soln.date: 2024-Jan-14_06:22:19 # obs: 250 (10 days) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459969.5 ! 2023-Jan-25.00 (TDB) Residual RMS= .62744 EC= .07135850720403294 QR= .9153635731512324 TP= 2460056.4022315005 OM= 306.5318106295966 W= 273.6017504988679 IN= 2.589558956781403 A= .9857017807757465 MA= 272.4781093570007 ADIST= 1.056039988400261 PER= .97865 N= 1.007130532 ANGMOM= .017035138 DAN= .97631 DDN= .9851 L= 220.1372332 B= -2.5844406 MOID= .00018829 TP= 2023-Apr-21.9022315005 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 29.7 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#22, OCC=1 radar( 2 delay, 0 Dop.) 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 23:12:19 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2023 BU) {source: JPL#22} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Jan-27 04:00:00.0000 UT Stop time : A.D. 2023-Jan-27 05:00:00.0000 UT Step-size : 1 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {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 : Sun 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 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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 ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2459969.5 ! 2023-Jan-25.00 (TDB) Residual RMS= .62744 EC= .07135850720403294 QR= .9153635731512324 TP= 2460056.4022315005 OM= 306.5318106295966 W= 273.6017504988679 IN= 2.589558956781403 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-5.585807332433314E-01 Y= 7.466856041216416E-01 Z= 3.255044782143706E-01 VX=-1.351305348446538E-02 VY=-9.562138899838682E-03 VZ=-4.996700265931551E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 29.7 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2023-Jan-27 04:00 0.984501071795 -0.0583609 2023-Jan-27 04:01 0.984501048840 -0.0561126 2023-Jan-27 04:02 0.984501026782 -0.0538872 2023-Jan-27 04:03 0.984501005612 -0.0516845 2023-Jan-27 04:04 0.984500985321 -0.0495041 2023-Jan-27 04:05 0.984500965900 -0.0473456 2023-Jan-27 04:06 0.984500947340 -0.0452088 2023-Jan-27 04:07 0.984500929633 -0.0430933 2023-Jan-27 04:08 0.984500912771 -0.0409988 2023-Jan-27 04:09 0.984500896744 -0.0389251 2023-Jan-27 04:10 0.984500881545 -0.0368717 2023-Jan-27 04:11 0.984500867165 -0.0348386 2023-Jan-27 04:12 0.984500853597 -0.0328252 2023-Jan-27 04:13 0.984500840832 -0.0308315 2023-Jan-27 04:14 0.984500828863 -0.0288570 2023-Jan-27 04:15 0.984500817682 -0.0269016 2023-Jan-27 04:16 0.984500807282 -0.0249649 2023-Jan-27 04:17 0.984500797654 -0.0230467 2023-Jan-27 04:18 0.984500788792 -0.0211468 2023-Jan-27 04:19 0.984500780689 -0.0192648 2023-Jan-27 04:20 0.984500773337 -0.0174006 2023-Jan-27 04:21 0.984500766729 -0.0155539 2023-Jan-27 04:22 0.984500760858 -0.0137244 2023-Jan-27 04:23 0.984500755718 -0.0119120 2023-Jan-27 04:24 0.984500751301 -0.0101164 2023-Jan-27 04:25 0.984500747601 -0.0083374 2023-Jan-27 04:26 0.984500744611 -0.0065747 2023-Jan-27 04:27 0.984500742325 -0.0048281 2023-Jan-27 04:28 0.984500740736 -0.0030975 2023-Jan-27 04:29 0.984500739838 -0.0013826 2023-Jan-27 04:30 0.984500739625 0.0003169 2023-Jan-27 04:31 0.984500740090 0.0020010 2023-Jan-27 04:32 0.984500741228 0.0036700 2023-Jan-27 04:33 0.984500743032 0.0053241 2023-Jan-27 04:34 0.984500745497 0.0069635 2023-Jan-27 04:35 0.984500748616 0.0085884 2023-Jan-27 04:36 0.984500752384 0.0101990 2023-Jan-27 04:37 0.984500756795 0.0117954 2023-Jan-27 04:38 0.984500761844 0.0133779 2023-Jan-27 04:39 0.984500767524 0.0149465 2023-Jan-27 04:40 0.984500773831 0.0165016 2023-Jan-27 04:41 0.984500780759 0.0180432 2023-Jan-27 04:42 0.984500788302 0.0195715 2023-Jan-27 04:43 0.984500796456 0.0210867 2023-Jan-27 04:44 0.984500805215 0.0225890 2023-Jan-27 04:45 0.984500814574 0.0240785 2023-Jan-27 04:46 0.984500824528 0.0255554 2023-Jan-27 04:47 0.984500835072 0.0270198 2023-Jan-27 04:48 0.984500846200 0.0284719 2023-Jan-27 04:49 0.984500857908 0.0299118 2023-Jan-27 04:50 0.984500870192 0.0313397 2023-Jan-27 04:51 0.984500883046 0.0327557 2023-Jan-27 04:52 0.984500896465 0.0341600 2023-Jan-27 04:53 0.984500910445 0.0355528 2023-Jan-27 04:54 0.984500924982 0.0369340 2023-Jan-27 04:55 0.984500940070 0.0383040 2023-Jan-27 04:56 0.984500955705 0.0396628 2023-Jan-27 04:57 0.984500971884 0.0410106 2023-Jan-27 04:58 0.984500988600 0.0423474 2023-Jan-27 04:59 0.984501005851 0.0436735 2023-Jan-27 05:00 0.984501023631 0.0449889 $$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. '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 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 = '2023 BU' START_TIME = '2023-Jan-27 04:00' STOP_TIME = '2023-Jan-27 05:00' STEP_SIZE = '1 min' QUANTITIES = '19'