API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 39P/Oterma 2024-May-03 18:42:57 Rec #:90000471 (+COV) Soln.date: 2024-Jan-16_15:22:33 # obs: 287 (1942-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456994.5 ! 2014-Dec-03.0000000 (TDB) RMSW= n.a. EC= .2284123245383775 QR= 5.712314418622992 TP= 2460043.7839299259 OM= 303.6355887080981 W= 89.7043305431787 IN= 1.478237003763243 A= 7.403325118179799 MA= 210.8024450350957 ADIST= 9.094335817736606 PER= 20.144126272711 N= .048928718 ANGMOM= .045567959 DAN= 7.00882 DDN= 7.02536 L= 33.3398208 B= 1.4782173 MOID= 4.71851015 TP= 2023-Apr-09.2839299259 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.8 M2= 13.6 k1= 14.75 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#24, data arc: 1942-02-17 to 2023-11-10 2: k1=14.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Fri May 3 18:42:58 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 39P/Oterma {source: JPL#24} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Nov-10 00:00:00.0000 UT Stop time : A.D. 2023-Nov-13 00:00:00.0000 UT Step-size : 60 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= 2456994.5 ! 2014-Dec-03.0000000 (TDB) RMSW= n.a. EC= .2284123245383775 QR= 5.712314418622992 TP= 2460043.7839299259 OM= 303.6355887080981 W= 89.7043305431787 IN= 1.478237003763243 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-5.317289091597196E+00 Y=-6.496615807643809E+00 Z=-3.052929370218818E+00 VX= 4.401069487651736E-03 VY=-2.434098768573271E-03 VZ=-9.931961747958078E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.8 M2= 13.6 k1= 14.75 k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN delta deldot S-O-T /r **************************************************************** $$SOE 2023-Nov-10 00:00 4.72987008017438 -0.2283897 177.3220 /L 2023-Nov-10 01:00 4.72986485511783 -0.2058647 177.3576 /L 2023-Nov-10 02:00 4.72986017213608 -0.1833378 177.3928 /L 2023-Nov-10 03:00 4.72985603127455 -0.1608091 177.4276 /L 2023-Nov-10 04:00 4.72985243257811 -0.1382785 177.4621 /L 2023-Nov-10 05:00 4.72984937609107 -0.1157460 177.4961 /L 2023-Nov-10 06:00 4.72984686185721 -0.0932118 177.5298 /L 2023-Nov-10 07:00 4.72984488991972 -0.0706757 177.5630 /L 2023-Nov-10 08:00 4.72984346032125 -0.0481380 177.5958 /L 2023-Nov-10 09:00 4.72984257310389 -0.0255984 177.6281 /L 2023-Nov-10 10:00 4.72984222830916 -0.0030572 177.6600 /L 2023-Nov-10 11:00 4.72984242597801 0.0194857 177.6913 /L 2023-Nov-10 12:00 4.72984316615083 0.0420303 177.7221 /L 2023-Nov-10 13:00 4.72984444886744 0.0645766 177.7524 /L 2023-Nov-10 14:00 4.72984627416710 0.0871244 177.7820 /L 2023-Nov-10 15:00 4.72984864208848 0.1096739 177.8111 /L 2023-Nov-10 16:00 4.72985155266968 0.1322249 177.8396 /L 2023-Nov-10 17:00 4.72985500594823 0.1547775 177.8675 /L 2023-Nov-10 18:00 4.72985900196107 0.1773316 177.8947 /L 2023-Nov-10 19:00 4.72986354074458 0.1998872 177.9211 /L 2023-Nov-10 20:00 4.72986862233453 0.2224442 177.9469 /L 2023-Nov-10 21:00 4.72987424676613 0.2450027 177.9719 /L 2023-Nov-10 22:00 4.72988041407398 0.2675627 177.9962 /L 2023-Nov-10 23:00 4.72988712429212 0.2901240 178.0196 /L 2023-Nov-11 00:00 4.72989437745398 0.3126867 178.0422 /L 2023-Nov-11 01:00 4.72990217359238 0.3352508 178.0640 /L 2023-Nov-11 02:00 4.72991051273960 0.3578162 178.0849 /L 2023-Nov-11 03:00 4.72991939492727 0.3803829 178.1048 /L 2023-Nov-11 04:00 4.72992882018644 0.4029509 178.1238 /L 2023-Nov-11 05:00 4.72993878854756 0.4255201 178.1418 /L 2023-Nov-11 06:00 4.72994930004048 0.4480906 178.1588 /L 2023-Nov-11 07:00 4.72996035469445 0.4706623 178.1748 /L 2023-Nov-11 08:00 4.72997195253809 0.4932351 178.1897 /L 2023-Nov-11 09:00 4.72998409359944 0.5158091 178.2036 /L 2023-Nov-11 10:00 4.72999677790590 0.5383842 178.2163 /T 2023-Nov-11 11:00 4.73001000548428 0.5609604 178.2278 /T 2023-Nov-11 12:00 4.73002377636077 0.5835377 178.2383 /T 2023-Nov-11 13:00 4.73003809056093 0.6061161 178.2475 /T 2023-Nov-11 14:00 4.73005294810971 0.6286954 178.2555 /T 2023-Nov-11 15:00 4.73006834903145 0.6512758 178.2623 /T 2023-Nov-11 16:00 4.73008429334983 0.6738571 178.2679 /T 2023-Nov-11 17:00 4.73010078108795 0.6964394 178.2722 /T 2023-Nov-11 18:00 4.73011781226824 0.7190226 178.2753 /T 2023-Nov-11 19:00 4.73013538691254 0.7416067 178.2771 /T 2023-Nov-11 20:00 4.73015350504203 0.7641917 178.2777 /T 2023-Nov-11 21:00 4.73017216667726 0.7867775 178.2770 /T 2023-Nov-11 22:00 4.73019137183815 0.8093641 178.2750 /T 2023-Nov-11 23:00 4.73021112054398 0.8319515 178.2718 /T 2023-Nov-12 00:00 4.73023141281339 0.8545396 178.2673 /T 2023-Nov-12 01:00 4.73025224866438 0.8771285 178.2616 /T 2023-Nov-12 02:00 4.73027362811429 0.8997181 178.2546 /T 2023-Nov-12 03:00 4.73029555117984 0.9223084 178.2464 /T 2023-Nov-12 04:00 4.73031801787708 0.9448994 178.2371 /T 2023-Nov-12 05:00 4.73034102822141 0.9674909 178.2265 /T 2023-Nov-12 06:00 4.73036458222760 0.9900831 178.2148 /T 2023-Nov-12 07:00 4.73038867990975 1.0126758 178.2019 /T 2023-Nov-12 08:00 4.73041332128128 1.0352691 178.1880 /T 2023-Nov-12 09:00 4.73043850635500 1.0578629 178.1729 /T 2023-Nov-12 10:00 4.73046423514302 1.0804572 178.1568 /T 2023-Nov-12 11:00 4.73049050765681 1.1030520 178.1397 /T 2023-Nov-12 12:00 4.73051732390716 1.1256471 178.1215 /T 2023-Nov-12 13:00 4.73054468390420 1.1482427 178.1024 /T 2023-Nov-12 14:00 4.73057258765739 1.1708387 178.0823 /T 2023-Nov-12 15:00 4.73060103517554 1.1934350 178.0613 /T 2023-Nov-12 16:00 4.73063002646675 1.2160317 178.0394 /T 2023-Nov-12 17:00 4.73065956153847 1.2386286 178.0167 /T 2023-Nov-12 18:00 4.73068964039748 1.2612258 177.9931 /T 2023-Nov-12 19:00 4.73072026304986 1.2838233 177.9687 /T 2023-Nov-12 20:00 4.73075142950103 1.3064209 177.9436 /T 2023-Nov-12 21:00 4.73078313975572 1.3290188 177.9177 /T 2023-Nov-12 22:00 4.73081539381798 1.3516168 177.8911 /T 2023-Nov-12 23:00 4.73084819169117 1.3742149 177.8638 /T 2023-Nov-13 00:00 4.73088153337796 1.3968131 177.8358 /T $$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 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 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 *******************************************************************************