API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 13P/Olbers 2024-May-24 01:07:28 Rec #:90000226 (+COV) Soln.date: 2024-May-14_12:50:39 # obs: 1558 (1887-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458196.5 ! 2018-Mar-19.0000000 (TDB) RMSW= n.a. EC= .9302050795096872 QR= 1.161343333575838 TP= 2460490.9049885105 OM= 85.88652615243714 W= 64.66434593330381 IN= 44.627414639259 A= 16.63936752728341 MA= 326.6827666617894 ADIST= 32.11739172099099 PER= 67.875559726554 N= .014521078 ANGMOM= .025755114 DAN= 1.60339 DDN= 3.72397 L= 142.2522646 B= 39.4144456 MOID= .459295 TP= 2024-Jun-29.4049885105 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 12.8 k1= 22.75 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.54390797019E-9 A2= 5.913103371859E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#40, data arc: 1887-08-27 to 2024-05-11 2: k1=22.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Fri May 24 01:07:28 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 13P/Olbers {source: JPL#40} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Jul-15 00:00:00.0000 UT Stop time : A.D. 2024-Jul-25 00:00:00.0000 UT Step-size : 180 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.240523.p240816 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-23. PREDICTS-> 2024-AUG-15 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= 2458196.5 ! 2018-Mar-19.0000000 (TDB) RMSW= n.a. EC= .9302050795096872 QR= 1.161343333575838 TP= 2460490.9049885105 OM= 85.88652615243714 W= 64.66434593330381 IN= 44.627414639259 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.108445608398934E+01 Y= 3.024913475776154E+00 Z=-1.069729666651775E+01 VX=-2.762234650494827E-03 VY= 7.168022191755582E-04 VZ= 3.430957806839409E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 12.8 k1= 22.75 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.54390797019E-9 A2= 5.913103371859E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN delta deldot S-O-T /r **************************************************************** $$SOE 2024-Jul-15 00:00 1.89846736836422 -2.0571884 33.8971 /T 2024-Jul-15 03:00 1.89832059592948 -2.0087068 33.9283 /T 2024-Jul-15 06:00 1.89817732858662 -1.9600903 33.9596 /T 2024-Jul-15 09:00 1.89803757606517 -1.9113392 33.9908 /T 2024-Jul-15 12:00 1.89790134805956 -1.8624540 34.0219 /T 2024-Jul-15 15:00 1.89776865422876 -1.8134353 34.0531 /T 2024-Jul-15 18:00 1.89763950419596 -1.7642836 34.0842 /T 2024-Jul-15 21:00 1.89751390754821 -1.7149993 34.1152 /T 2024-Jul-16 00:00 1.89739187383606 -1.6655829 34.1463 /T 2024-Jul-16 03:00 1.89727341257319 -1.6160351 34.1773 /T 2024-Jul-16 06:00 1.89715853323603 -1.5663562 34.2083 /T 2024-Jul-16 09:00 1.89704724526341 -1.5165468 34.2392 /T 2024-Jul-16 12:00 1.89693955805608 -1.4666075 34.2701 /T 2024-Jul-16 15:00 1.89683548097639 -1.4165387 34.3010 /T 2024-Jul-16 18:00 1.89673502334777 -1.3663410 34.3318 /T 2024-Jul-16 21:00 1.89663819445437 -1.3160151 34.3626 /T 2024-Jul-17 00:00 1.89654500354054 -1.2655613 34.3933 /T 2024-Jul-17 03:00 1.89645545981038 -1.2149803 34.4241 /T 2024-Jul-17 06:00 1.89636957242726 -1.1642727 34.4547 /T 2024-Jul-17 09:00 1.89628735051328 -1.1134390 34.4854 /T 2024-Jul-17 12:00 1.89620880314879 -1.0624798 34.5160 /T 2024-Jul-17 15:00 1.89613393937178 -1.0113957 34.5465 /T 2024-Jul-17 18:00 1.89606276817738 -0.9601872 34.5771 /T 2024-Jul-17 21:00 1.89599529851721 -0.9088551 34.6075 /T 2024-Jul-18 00:00 1.89593153929883 -0.8573999 34.6380 /T 2024-Jul-18 03:00 1.89587149938508 -0.8058223 34.6684 /T 2024-Jul-18 06:00 1.89581518759342 -0.7541228 34.6987 /T 2024-Jul-18 09:00 1.89576261269529 -0.7023021 34.7290 /T 2024-Jul-18 12:00 1.89571378341541 -0.6503609 34.7593 /T 2024-Jul-18 15:00 1.89566870843103 -0.5982998 34.7895 /T 2024-Jul-18 18:00 1.89562739637126 -0.5461195 34.8197 /T 2024-Jul-18 21:00 1.89558985581624 -0.4938207 34.8498 /T 2024-Jul-19 00:00 1.89555609529643 -0.4414041 34.8799 /T 2024-Jul-19 03:00 1.89552612329176 -0.3888703 34.9099 /T 2024-Jul-19 06:00 1.89549994823084 -0.3362202 34.9399 /T 2024-Jul-19 09:00 1.89547757849012 -0.2834543 34.9698 /T 2024-Jul-19 12:00 1.89545902239303 -0.2305736 34.9997 /T 2024-Jul-19 15:00 1.89544428820913 -0.1775786 35.0295 /T 2024-Jul-19 18:00 1.89543338415320 -0.1244703 35.0593 /T 2024-Jul-19 21:00 1.89542631838436 -0.0712493 35.0890 /T 2024-Jul-20 00:00 1.89542309900514 -0.0179165 35.1187 /T 2024-Jul-20 03:00 1.89542373406057 0.0355274 35.1483 /T 2024-Jul-20 06:00 1.89542823153729 0.0890815 35.1779 /T 2024-Jul-20 09:00 1.89543659936253 0.1427451 35.2074 /T 2024-Jul-20 12:00 1.89544884540325 0.1965171 35.2369 /T 2024-Jul-20 15:00 1.89546497746515 0.2503969 35.2663 /T 2024-Jul-20 18:00 1.89548500329178 0.3043836 35.2957 /T 2024-Jul-20 21:00 1.89550893056355 0.3584761 35.3250 /T 2024-Jul-21 00:00 1.89553676689683 0.4126738 35.3542 /T 2024-Jul-21 03:00 1.89556851984302 0.4669756 35.3834 /T 2024-Jul-21 06:00 1.89560419688766 0.5213806 35.4125 /T 2024-Jul-21 09:00 1.89564380544952 0.5758880 35.4416 /T 2024-Jul-21 12:00 1.89568735287972 0.6304967 35.4706 /T 2024-Jul-21 15:00 1.89573484646088 0.6852058 35.4996 /T 2024-Jul-21 18:00 1.89578629340628 0.7400144 35.5285 /T 2024-Jul-21 21:00 1.89584170085909 0.7949214 35.5573 /T 2024-Jul-22 00:00 1.89590107589154 0.8499259 35.5861 /T 2024-Jul-22 03:00 1.89596442550419 0.9050269 35.6148 /T 2024-Jul-22 06:00 1.89603175662524 0.9602234 35.6435 /T 2024-Jul-22 09:00 1.89610307610983 1.0155144 35.6721 /T 2024-Jul-22 12:00 1.89617839073941 1.0708987 35.7006 /T 2024-Jul-22 15:00 1.89625770722115 1.1263755 35.7291 /T 2024-Jul-22 18:00 1.89634103218738 1.1819437 35.7575 /T 2024-Jul-22 21:00 1.89642837219505 1.2376021 35.7858 /T 2024-Jul-23 00:00 1.89651973372534 1.2933498 35.8141 /T 2024-Jul-23 03:00 1.89661512318317 1.3491857 35.8423 /T 2024-Jul-23 06:00 1.89671454689685 1.4051088 35.8705 /T 2024-Jul-23 09:00 1.89681801111777 1.4611179 35.8986 /T 2024-Jul-23 12:00 1.89692552202014 1.5172121 35.9266 /T 2024-Jul-23 15:00 1.89703708570074 1.5733901 35.9545 /T 2024-Jul-23 18:00 1.89715270817873 1.6296510 35.9824 /T 2024-Jul-23 21:00 1.89727239539559 1.6859937 36.0102 /T 2024-Jul-24 00:00 1.89739615321499 1.7424171 36.0379 /T 2024-Jul-24 03:00 1.89752398742278 1.7989201 36.0656 /T 2024-Jul-24 06:00 1.89765590372698 1.8555017 36.0932 /T 2024-Jul-24 09:00 1.89779190775789 1.9121607 36.1207 /T 2024-Jul-24 12:00 1.89793200506818 1.9688961 36.1482 /T 2024-Jul-24 15:00 1.89807620113301 2.0257068 36.1756 /T 2024-Jul-24 18:00 1.89822450135027 2.0825918 36.2029 /T 2024-Jul-24 21:00 1.89837691104077 2.1395499 36.2301 /T 2024-Jul-25 00:00 1.89853343544851 2.1965802 36.2573 /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 *******************************************************************************