******************************************************************************* JPL/HORIZONS 405 Thia (A895 OB) 2024-Apr-30 08:41:25 Rec #: 405 (+COV) Soln.date: 2024-Apr-17_17:24:30 # obs: 7440 (1899-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457541.5 ! 2016-Jun-02.00 (TDB) Residual RMS= .20838 EC= .2423990073484765 QR= 1.959195692444324 TP= 2457062.3086273745 OM= 255.2479622507197 W= 308.8214011213512 IN= 11.9379164691465 A= 2.586052171852819 MA= 113.5683041998804 ADIST= 3.212908651261314 PER= 4.15876 N= .236999893 ANGMOM= .026838046 DAN= 2.11301 DDN= 2.87026 L= 204.6826245 B= -9.274172 MOID= .97794902 TP= 2015-Feb-08.8086273745 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 54.447 ROTPER= 9.95 H= 8.88 G= .150 B-V= .698 ALBEDO= .018 STYP= Ch ASTEROID comments: 1: soln ref.= JPL#141, OCC=0 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Tue Apr 30 08:41:25 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 405 Thia (A895 OB) {source: JPL#141} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1990-May-04 00:00:00.0000 UT Stop time : A.D. 1990-May-05 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 54.447 km 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.240429.p240723 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-29. PREDICTS-> 2024-JUL-22 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= 2457541.5 ! 2016-Jun-02.00 (TDB) Residual RMS= .20838 EC= .2423990073484765 QR= 1.959195692444324 TP= 2457062.3086273745 OM= 255.2479622507197 W= 308.8214011213512 IN= 11.9379164691465 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 2.702423781443589E+00 Y=-1.160158150739619E+00 Z= 1.579988075732027E-01 VX= 4.843073355150505E-03 VY= 7.043473385992687E-03 VZ= 3.668155183497989E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 54.447 ROTPER= 9.95 H= 8.88 G= .150 B-V= .698 ALBEDO= .018 STYP= Ch ******************************************************************************* Date__(UT)__HR:MN delta deldot *************************************************** $$SOE 1990-May-04 00:00 0.96925957826910 -0.1712279 1990-May-04 01:00 0.96925565437642 -0.1548883 1990-May-04 02:00 0.96925212370092 -0.1385474 1990-May-04 03:00 0.96924898627250 -0.1222053 1990-May-04 04:00 0.96924624212071 -0.1058620 1990-May-04 05:00 0.96924389127480 -0.0895175 1990-May-04 06:00 0.96924193376367 -0.0731718 1990-May-04 07:00 0.96924036961590 -0.0568249 1990-May-04 08:00 0.96923919885974 -0.0404769 1990-May-04 09:00 0.96923842152312 -0.0241277 1990-May-04 10:00 0.96923803763362 -0.0077773 1990-May-04 11:00 0.96923804721852 0.0085741 1990-May-04 12:00 0.96923845030475 0.0249267 1990-May-04 13:00 0.96923924691893 0.0412804 1990-May-04 14:00 0.96924043708734 0.0576351 1990-May-04 15:00 0.96924202083596 0.0739910 1990-May-04 16:00 0.96924399819041 0.0903479 1990-May-04 17:00 0.96924636917601 0.1067058 1990-May-04 18:00 0.96924913381774 0.1230648 1990-May-04 19:00 0.96925229214028 0.1394248 1990-May-04 20:00 0.96925584416797 0.1557857 1990-May-04 21:00 0.96925978992482 0.1721477 1990-May-04 22:00 0.96926412943453 0.1885107 1990-May-04 23:00 0.96926886272047 0.2048746 1990-May-05 00:00 0.96927398980569 0.2212395 $$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. '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 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 = '405' START_TIME = '1990-05-04' STOP_TIME = '1990-05-05' STEP_SIZE = '1 hour' QUANTITIES = '20'