******************************************************************************* JPL/HORIZONS (2023 BU) 2024-Apr-26 06:39:27 Rec #:50651706 (+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 Fri Apr 26 06:39:27 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-26 00:00:00.0000 UT Stop time : A.D. 2023-Jan-28 00:00:00.0000 UT Step-size : 60 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.240425.p240719 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-25. PREDICTS-> 2024-JUL-18 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-26 00:00 0.986398585335 -2.3217051 2023-Jan-26 01:00 0.986342542378 -2.3361449 2023-Jan-26 02:00 0.986286139264 -2.3516575 2023-Jan-26 03:00 0.986229348629 -2.3683750 2023-Jan-26 04:00 0.986172139665 -2.3864522 2023-Jan-26 05:00 0.986114477502 -2.4060731 2023-Jan-26 06:00 0.986056322428 -2.4274572 2023-Jan-26 07:00 0.985997628926 -2.4508696 2023-Jan-26 08:00 0.985938344434 -2.4766329 2023-Jan-26 09:00 0.985878407758 -2.5051451 2023-Jan-26 10:00 0.985817747004 -2.5369025 2023-Jan-26 11:00 0.985756276817 -2.5725338 2023-Jan-26 12:00 0.985693894662 -2.6128480 2023-Jan-26 13:00 0.985630475672 -2.6589063 2023-Jan-26 14:00 0.985565865362 -2.7121317 2023-Jan-26 15:00 0.985499869003 -2.7744822 2023-Jan-26 16:00 0.985432235603 -2.8487366 2023-Jan-26 17:00 0.985362632760 -2.9389904 2023-Jan-26 18:00 0.985290605155 -3.0515693 2023-Jan-26 19:00 0.985215501646 -3.1968471 2023-Jan-26 20:00 0.985136336430 -3.3932417 2023-Jan-26 21:00 0.985051494312 -3.6772615 2023-Jan-26 22:00 0.984958000316 -4.1340982 2023-Jan-26 23:00 0.984849223534 -5.0224078 2023-Jan-27 00:00 0.984704635900 -7.4373146 2023-Jan-27 01:00 0.984551217762 -2.9032637 2023-Jan-27 02:00 0.984515403381 -0.7334356 2023-Jan-27 03:00 0.984504543026 -0.2536057 2023-Jan-27 04:00 0.984501071795 -0.0583609 2023-Jan-27 05:00 0.984501023631 0.0449889 2023-Jan-27 06:00 0.984502922773 0.1082758 2023-Jan-27 07:00 0.984506071027 0.1508395 2023-Jan-27 08:00 0.984510087401 0.1814254 2023-Jan-27 09:00 0.984514743197 0.2045257 2023-Jan-27 10:00 0.984519891397 0.2226681 2023-Jan-27 11:00 0.984525432471 0.2373761 2023-Jan-27 12:00 0.984531296252 0.2496178 2023-Jan-27 13:00 0.984537431631 0.2600362 2023-Jan-27 14:00 0.984543800363 0.2690732 2023-Jan-27 15:00 0.984550373179 0.2770418 2023-Jan-27 16:00 0.984557127245 0.2841693 2023-Jan-27 17:00 0.984564044447 0.2906244 2023-Jan-27 18:00 0.984571110210 0.2965347 2023-Jan-27 19:00 0.984578312654 0.3019984 2023-Jan-27 20:00 0.984585641986 0.3070918 2023-Jan-27 21:00 0.984593090055 0.3118755 2023-Jan-27 22:00 0.984600650009 0.3163979 2023-Jan-27 23:00 0.984608316048 0.3206981 2023-Jan-28 00:00 0.984616083218 0.3248078 $$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-26' STOP_TIME = '2023-Jan-28' STEP_SIZE = '1 hours' QUANTITIES = '19'