******************************************************************************* JPL/HORIZONS (2022 WJ1) 2024-May-05 00:20:12 Rec #:50651718 (+COV) Soln.date: 2023-Jul-05_08:04:03 # obs: 51 (span: n.a.) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459902.5 ! 2022-Nov-19.00 (TDB) Residual RMS= 1.1416 EC= .5131408969879399 QR= .9273385976938732 TP= 2459929.8938409709 OM= 56.71526882098466 W= 35.10562884444036 IN= 2.61764194477995 A= 1.904737103520691 MA= 349.7291960017914 ADIST= 2.882135609347509 PER= 2.62882 N= .374931139 ANGMOM= .020377002 DAN= .98831 DDN= 2.41845 L= 91.7927607 B= 1.5050177 MOID= 3.066E-5 TP= 2022-Dec-16.3938409709 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 33.58 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#6, OCC=6 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 00:20:13 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2022 WJ1) {source: JPL#6} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2020-May-10 00:00:00.0000 UT Stop time : A.D. 2020-Jun-10 00:00:00.0000 UT Step-size : 1440 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= 2459902.5 ! 2022-Nov-19.00 (TDB) Residual RMS= 1.1416 EC= .5131408969879399 QR= .9273385976938732 TP= 2459929.8938409709 OM= 56.71526882098466 W= 35.10562884444036 IN= 2.61764194477995 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 5.501054098184288E-01 Y= 7.553331180136330E-01 Z= 3.270712697967040E-01 VX=-1.950360761894303E-02 VY= 6.800785739645877E-03 VZ= 3.974808822723998E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 33.58 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2020-May-10 00:00 0.945954080712 -4.3505877 2020-May-11 00:00 0.943520176265 -4.0770550 2020-May-12 00:00 0.941245273870 -3.8000254 2020-May-13 00:00 0.939131335847 -3.5196985 2020-May-14 00:00 0.937180206232 -3.2362844 2020-May-15 00:00 0.935393604832 -2.9500030 2020-May-16 00:00 0.933773121577 -2.6610839 2020-May-17 00:00 0.932320211210 -2.3697655 2020-May-18 00:00 0.931036188355 -2.0762946 2020-May-19 00:00 0.929922223000 -1.7809251 2020-May-20 00:00 0.928979336422 -1.4839178 2020-May-21 00:00 0.928208397597 -1.1855392 2020-May-22 00:00 0.927610120118 -0.8860607 2020-May-23 00:00 0.927185059643 -0.5857576 2020-May-24 00:00 0.926933611893 -0.2849082 2020-May-25 00:00 0.926856011225 0.0162071 2020-May-26 00:00 0.926952329782 0.3173072 2020-May-27 00:00 0.927222477231 0.6181108 2020-May-28 00:00 0.927666201089 0.9183378 2020-May-29 00:00 0.928283087643 1.2177102 2020-May-30 00:00 0.929072563437 1.5159530 2020-May-31 00:00 0.930033897338 1.8127953 2020-Jun-01 00:00 0.931166203147 2.1079713 2020-Jun-02 00:00 0.932468442743 2.4012208 2020-Jun-03 00:00 0.933939429724 2.6922906 2020-Jun-04 00:00 0.935577833536 2.9809349 2020-Jun-05 00:00 0.937382184034 3.2669162 2020-Jun-06 00:00 0.939350876466 3.5500060 2020-Jun-07 00:00 0.941482176813 3.8299853 2020-Jun-08 00:00 0.943774227481 4.1066451 2020-Jun-09 00:00 0.946225053269 4.3797873 2020-Jun-10 00:00 0.948832567601 4.6492243 $$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 = '2022 WJ1' START_TIME = '2020-May-10' STOP_TIME = '2020-Jun-10' STEP_SIZE = '1 day' QUANTITIES = '19'