******************************************************************************* JPL/HORIZONS ISON (C/2012 S1) 2024-May-09 13:25:27 Rec #:90004151 (+COV) Soln.date: 2021-Apr-15_23:32:22 # obs: 6682 (2011-2013) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456413.5 ! 2013-May-01.0000000 (TDB) RMSW= n.a. EC= 1.000005095690719 QR= .0124667131396643 TP= 2456625.2645302862 OM= 295.6865418045648 W= 345.5411989420559 IN= 62.16289397901024 A= -2446.520761814393 MA= -.001724780901917927ADIST= 9.999999E99 PER= 9.999999E99 N= 8.145000000000001E-6 ANGMOM= .00271627 DAN= .01267 DDN= .78735 L= 288.8208515 B= -12.7554416 MOID= .0229939 TP= 2013-Nov-28.7645302862 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 M2= n.a. k1= 4.75 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 8.538925170898E-8 A2= 5.750839114189E-9 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#56, data arc: 2011-09-30 to 2013-11-22 2: k1=4.75; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 9 13:25:28 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: ISON (C/2012 S1) {source: JPL#56} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2013-Nov-28 18:30:00.0000 UT Stop time : A.D. 2013-Nov-28 19:00:00.0000 UT Step-size : 1 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.240508.p240801 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-08. PREDICTS-> 2024-JUL-31 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= 2456413.5 ! 2013-May-01.0000000 (TDB) RMSW= n.a. EC= 1.000005095690719 QR= .0124667131396643 TP= 2456625.2645302862 OM= 295.6865418045648 W= 345.5411989420559 IN= 62.16289397901024 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.445349759502127E+00 Y= 3.101113594083580E+00 Z= 1.865345632469247E+00 VX= 4.232982012846101E-03 VY=-9.600824666202080E-03 VZ=-6.472976026312528E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 10.2 M2= n.a. k1= 4.75 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 8.538925170898E-8 A2= 5.750839114189E-9 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************************************************************** Date__(UT)__HR:MN r rdot delta deldot VmagSn VmagOb RNG_3sigma RNGRT_3sig ******************************************************************************************************************************** $$SOE 2013-Nov-28 18:30 0.012597153437 -39.7025292 0.99587617431521 -37.2914399 375.2103595 392.6299419 468.9249 0.3042018 2013-Nov-28 18:31 0.012581667989 -37.5055165 0.99586089183820 -38.9070079 375.4412474 392.7579571 484.9609 0.3049663 2013-Nov-28 18:32 0.012567065886 -35.2979037 0.99584496055829 -40.5258429 375.6593605 392.8723892 501.1559 0.3056508 2013-Nov-28 18:33 0.012553351276 -33.0802615 0.99582837924868 -42.1474908 375.8645688 392.9731218 517.4952 0.3062540 2013-Nov-28 18:34 0.012540528074 -30.8531725 0.99581114686586 -43.7714918 376.0567493 393.0600459 533.9649 0.3067748 2013-Nov-28 18:35 0.012528599962 -28.6172311 0.99579326255188 -45.3973807 376.2357860 393.1330603 550.5520 0.3072123 2013-Nov-28 18:36 0.012517570379 -26.3730425 0.99577472563645 -47.0246872 376.4015704 393.1920715 567.2445 0.3075656 2013-Nov-28 18:37 0.012507442519 -24.1212218 0.99575553563871 -48.6529370 376.5540014 393.2369942 584.0308 0.3078338 2013-Nov-28 18:38 0.012498219329 -21.8623941 0.99573569226889 -50.2816520 376.6929855 393.2677512 600.8999 0.3080164 2013-Nov-28 18:39 0.012489903504 -19.5971928 0.99571519542967 -51.9103509 376.8184371 393.2842738 617.8415 0.3081126 2013-Nov-28 18:40 0.012482497480 -17.3262598 0.99569404521740 -53.5385500 376.9302787 393.2865017 634.8457 0.3081221 2013-Nov-28 18:41 0.012476003437 -15.0502439 0.99567224192288 -55.1657636 377.0284408 393.2743833 651.9029 0.3080444 2013-Nov-28 18:42 0.012470423293 -12.7698005 0.99564978603208 -56.7915046 377.1128623 393.2478758 669.0041 0.3078794 2013-Nov-28 18:43 0.012465758702 -10.4855907 0.99562667822664 -58.4152853 377.1834905 393.2069450 686.1405 0.3076267 2013-Nov-28 18:44 0.012462011050 -8.1982804 0.99560291938385 -60.0366179 377.2402810 393.1515661 703.3036 0.3072865 2013-Nov-28 18:45 0.012459181459 -5.9085394 0.99557851057669 -61.6550152 377.2831981 393.0817229 720.4853 0.3068588 2013-Nov-28 18:46 0.012457270776 -3.6170409 0.99555345307342 -63.2699912 377.3122148 392.9974083 737.6775 0.3063437 2013-Nov-28 18:47 0.012456279583 -1.3244600 0.99552774833708 -64.8810617 377.3273127 392.8986245 754.8727 0.3057417 2013-Nov-28 18:48 0.012456208188 0.9685264 0.99550139802447 -66.4877451 377.3284821 392.7853825 772.0634 0.3050530 2013-Nov-28 18:49 0.012457056626 3.2612413 0.99547440398520 -68.0895626 377.3157221 392.6577027 789.2423 0.3042782 2013-Nov-28 18:50 0.012458824665 5.5530076 0.99544676826020 -69.6860394 377.2890405 392.5156142 806.4025 0.3034179 2013-Nov-28 18:51 0.012461511796 7.8431497 0.99541849308031 -71.2767048 377.2484538 392.3591554 823.5370 0.3024730 2013-Nov-28 18:52 0.012465117243 10.1309940 0.99538958086420 -72.8610931 377.1939874 392.1883735 840.6392 0.3014442 2013-Nov-28 18:53 0.012469639959 12.4158698 0.99536003421642 -74.4387443 377.1256749 392.0033249 857.7026 0.3003325 2013-Nov-28 18:54 0.012475078629 14.6971104 0.99532985592514 -76.0092041 377.0435591 391.8040743 874.7209 0.2991390 2013-Nov-28 18:55 0.012481431671 16.9740534 0.99529904895943 -77.5720252 376.9476907 391.5906956 891.6879 0.2978648 2013-Nov-28 18:56 0.012488697238 19.2460423 0.99526761646660 -79.1267673 376.8381293 391.3632710 908.5978 0.2965111 2013-Nov-28 18:57 0.012496873222 21.5124266 0.99523556176918 -80.6729979 376.7149425 391.1218913 925.4446 0.2950794 2013-Nov-28 18:58 0.012505957253 23.7725630 0.99520288836181 -82.2102926 376.5782061 390.8666556 942.2226 0.2935711 2013-Nov-28 18:59 0.012515946707 26.0258161 0.99516959990768 -83.7382360 376.4280041 390.5976709 958.9265 0.2919877 2013-Nov-28 19:00 0.012526838705 28.2715589 0.99513570023508 -85.2564217 376.2644283 390.3150525 975.5508 0.2903308 $$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 '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 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************************************************************** !$$SOF COMMAND = '2012 S1' START_TIME = '2013-11-28 18:30' STOP_TIME = '2013-11-28 19:00' STEP_SIZE = '1 min' QUANTITIES = '19,20,22,39'