******************************************************************************* JPL/HORIZONS (2024 YR4) 2025-Dec-12 17:50:48 Rec #:50582929 (+COV) Soln.date: 2025-Jun-03_07:47:32 # obs: 477 (2024-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460705.5 ! 2025-Jan-30.00 (TDB) Residual RMS= .058675 EC= .6615999301423001 QR= .8515188266875525 TP= 2460636.9238411798 OM= 271.3674693540159 W= 134.3644983455991 IN= 3.408259321981154 A= 2.516308070047454 MA= 16.93290662173731 ADIST= 4.181097313407356 PER= 3.99166 N= .246921188 ANGMOM= .020461704 DAN= 2.63285 DDN= .96737 L= 45.7826715 B= 2.4358823 MOID= .00285384 TP= 2024-Nov-22.4238411798 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 23.92 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#78, OCC=3 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:50:48 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2024 YR4) {source: JPL#78} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2036-Mar-01 00:00:00.0000 UT Stop time : A.D. 2036-Nov-01 00:00:00.0000 UT Step-size : 1 calendar month ******************************************************************************* 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.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 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= 2460705.5 ! 2025-Jan-30.00 (TDB) Residual RMS= .058675 EC= .6615999301423001 QR= .8515188266875525 TP= 2460636.9238411798 OM= 271.3674693540159 W= 134.3644983455991 IN= 3.408259321981154 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-7.817185871179870E-01 Y= 9.591166659204480E-01 Z= 3.666886038072873E-01 VX=-1.831413040000361E-02 VY=-1.487883867213291E-03 VZ=-1.836791648737177E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 23.92 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot RNG_3sigma RNGRT_3sig ************************************************************************* $$SOE 2036-Mar-01 00:00 2.215775075494 -13.3234901 124894071. 14.1346240 2036-Apr-01 00:00 1.966735581549 -14.4905618 89792736.5 17.3587381 2036-May-01 00:00 1.706408259799 -15.5213248 35175273.6 21.7760395 2036-Jun-01 00:00 1.422070249494 -16.0926570 63126568.3 27.9775310 2036-Jul-01 00:00 1.148805381552 -14.9991137 227555312. 34.1097186 2036-Aug-01 00:00 0.923442866750 -8.9682242 420544996. 42.1542963 2036-Sep-01 00:00 0.871333028569 3.7152783 495160942. 61.4634966 2036-Oct-01 00:00 1.026827783482 12.9916571 463655851. 56.4070171 2036-Nov-01 00:00 1.292685132354 15.9131397 409712681. 38.9412844 $$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. STATISTICAL UNCERTAINTIES Output includes formal +/- 3 standard-deviation statistical orbit uncertainty quantities. There is a 99.7% (1-D) or 98.9% (2-D) chance the actual value is within given bounds. These statistical calculations assume observational data errors are random. If there are systematic biases (such as timing, reduction or star-catalog errors), results can be optimistic. Because the epoch covariance is mapped using linearized variational partial derivatives, results can also be optimistic for times far from the solution epoch, particularly for objects having close planetary encounters. '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 'RNG_3sigma RNGRT_3sig' = Range and range rate (radial velocity) formal 3-standard-deviation uncertainties. Units: KM, 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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '2024 YR4' QUANTITIES = '19,39' START_TIME = '2036-03-01' STEP_SIZE = '1 month' STOP_TIME = '2036-11-01'