******************************************************************************* JPL/HORIZONS 2060 Chiron (1977 UB) 2025-Dec-12 17:51:34 Rec #: 2060 (+COV) Soln.date: 2025-Nov-26_23:51:41 # obs: 5890 (1895-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457855.5 ! 2017-Apr-12.00 (TDB) Residual RMS= .19876 EC= .382552372241639 QR= 8.424450790384038 TP= 2450143.4600167535 OM= 209.2019442341972 W= 339.6295681550643 IN= 6.949447857129732 A= 13.6439924807371 MA= 150.82076500369 ADIST= 18.86353417109017 PER= 50.39882 N= .019556533 ANGMOM= .058707426 DAN= 8.572800000000001 DDN= 18.1599 L= 188.9689939 B= -2.4138086 MOID= 7.42672014 TP= 1996-Feb-29.9600167535 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 83. ROTPER= 5.918 H= 5.55 G= .150 B-V= .704 ALBEDO= .150 STYP= Cb ASTEROID comments: 1: soln ref.= JPL#169, OCC=0 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:51:34 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 2060 Chiron (1977 UB) {source: JPL#169} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1996-Mar-20 00:00:00.0000 UT Stop time : A.D. 1996-Apr-10 00:00:00.0000 UT Step-size : 720 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 83. 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.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= 2457855.5 ! 2017-Apr-12.00 (TDB) Residual RMS= .19876 EC= .382552372241639 QR= 8.424450790384038 TP= 2450143.4600167535 OM= 209.2019442341972 W= 339.6295681550643 IN= 6.949447857129732 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.838753830661277E+01 Y=-2.058211231494874E+00 Z= 4.956067958648089E-01 VX= 7.833676393119850E-04 VY= 2.954248185872387E-03 VZ= 9.724171703023737E-04 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= 83. ROTPER= 5.918 H= 5.55 G= .150 B-V= .704 ALBEDO= .150 STYP= Cb ******************************************************************************* Date__(UT)__HR:MN APmag S-brt r rdot ******************************************************************* $$SOE 1996-Mar-20 00:00 14.752 6.918 8.454853147357 0.0936376 1996-Mar-20 12:00 14.747 6.913 8.454880385610 0.0950058 1996-Mar-21 00:00 14.741 6.908 8.454908018932 0.0963739 1996-Mar-21 12:00 14.735 6.903 8.454936047312 0.0977420 1996-Mar-22 00:00 14.729 6.898 8.454964470740 0.0991101 1996-Mar-22 12:00 14.724 6.892 8.454993289203 0.1004781 1996-Mar-23 00:00 14.718 6.887 8.455022502691 0.1018461 1996-Mar-23 12:00 14.712 6.881 8.455052111194 0.1032140 1996-Mar-24 00:00 14.706 6.875 8.455082114699 0.1045819 1996-Mar-24 12:00 14.700 6.870 8.455112513195 0.1059498 1996-Mar-25 00:00 14.693 6.864 8.455143306672 0.1073176 1996-Mar-25 12:00 14.687 6.858 8.455174495119 0.1086854 1996-Mar-26 00:00 14.681 6.852 8.455206078522 0.1100532 1996-Mar-26 12:00 14.674 6.845 8.455238056872 0.1114209 1996-Mar-27 00:00 14.668 6.839 8.455270430155 0.1127886 1996-Mar-27 12:00 14.661 6.833 8.455303198361 0.1141563 1996-Mar-28 00:00 14.654 6.826 8.455336361478 0.1155239 1996-Mar-28 12:00 14.648 6.820 8.455369919493 0.1168915 1996-Mar-29 00:00 14.641 6.814 8.455403872394 0.1182590 1996-Mar-29 12:00 14.635 6.808 8.455438220168 0.1196265 1996-Mar-30 00:00 14.629 6.802 8.455472962803 0.1209939 1996-Mar-30 12:00 14.625 6.797 8.455508100286 0.1223613 1996-Mar-31 00:00 14.621 6.794 8.455543632602 0.1237287 1996-Mar-31 12:00 14.620 6.792 8.455579559740 0.1250960 1996-Apr-01 00:00 14.620 6.793 8.455615881684 0.1264633 1996-Apr-01 12:00 14.622 6.795 8.455652598420 0.1278305 1996-Apr-02 00:00 14.626 6.799 8.455689709934 0.1291976 1996-Apr-02 12:00 14.632 6.804 8.455727216210 0.1305648 1996-Apr-03 00:00 14.638 6.810 8.455765117234 0.1319318 1996-Apr-03 12:00 14.644 6.816 8.455803412988 0.1332988 1996-Apr-04 00:00 14.650 6.823 8.455842103457 0.1346658 1996-Apr-04 12:00 14.657 6.829 8.455881188623 0.1360327 1996-Apr-05 00:00 14.663 6.836 8.455920668470 0.1373995 1996-Apr-05 12:00 14.670 6.842 8.455960542979 0.1387663 1996-Apr-06 00:00 14.676 6.848 8.456000812132 0.1401330 1996-Apr-06 12:00 14.683 6.855 8.456041475910 0.1414997 1996-Apr-07 00:00 14.689 6.861 8.456082534293 0.1428663 1996-Apr-07 12:00 14.695 6.867 8.456123987263 0.1442328 1996-Apr-08 00:00 14.702 6.872 8.456165834799 0.1455992 1996-Apr-08 12:00 14.708 6.878 8.456208076880 0.1469656 1996-Apr-09 00:00 14.714 6.884 8.456250713485 0.1483319 1996-Apr-09 12:00 14.720 6.889 8.456293744593 0.1496982 1996-Apr-10 00:00 14.725 6.895 8.456337170183 0.1510644 $$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. 'APmag S-brt' = The asteroids' approximate apparent airless visual magnitude and surface brightness using the standard IAU H-G system magnitude model: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2) For solar phase angles >90 deg, the error could exceed 1 magnitude. For phase angles >120 degrees, output values are rounded to the nearest integer to indicate error could be large and unknown. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND '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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = 'Chiron' QUANTITIES = '9,19' START_TIME = '1996-03-20' STEP_SIZE = '12 hours' STOP_TIME = '1996-04-10'