API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 13P/Olbers 2024-Apr-30 07:43:20 Rec #:90000226 (+COV) Soln.date: 2024-Apr-29_15:03:53 # obs: 1516 (1887-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458136.5 ! 2018-Jan-18.0000000 (TDB) RMSW= n.a. EC= .9302444951818024 QR= 1.160691249397305 TP= 2460490.7569010681 OM= 85.89885426861763 W= 64.66200651936647 IN= 44.62782263886866 A= 16.63942153988265 MA= 325.8138188395701 ADIST= 32.118151830368 PER= 67.87589022034 N= .014521007 ANGMOM= .025748146 DAN= 1.60247 DDN= 3.72227 L= 142.2616176 B= 39.413875 MOID= .45913199 TP= 2024-Jun-29.2569010681 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.3 M2= 12.9 k1= 22.25 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= 1.543928980827E-9 A2= 5.913251638412E-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#38, data arc: 1887-08-27 to 2024-04-23 2: k1=22.25, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Tue Apr 30 07:43:21 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 13P/Olbers {source: JPL#38} 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.240429.p240723 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-29. PREDICTS-> 2024-JUL-22 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= 2458136.5 ! 2018-Jan-18.0000000 (TDB) RMSW= n.a. EC= .9302444951818024 QR= 1.160691249397305 TP= 2460490.7569010681 OM= 85.89885426861763 W= 64.66200651936647 IN= 44.62782263886866 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.124868981842619E+01 Y= 2.981507518497300E+00 Z=-1.090169038902271E+01 VX=-2.712526192091553E-03 VY= 7.299052623694262E-04 VZ= 3.382356495793091E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.3 M2= 12.9 k1= 22.25 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= 1.543928980827E-9 A2= 5.913251638412E-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 1.89846797957225 -2.0572005 33.8971 /T 2024-Jul-15 03:00 1.89832120625823 -2.0087190 33.9283 /T 2024-Jul-15 06:00 1.89817793803261 -1.9601025 33.9595 /T 2024-Jul-15 09:00 1.89803818462492 -1.9113515 33.9907 /T 2024-Jul-15 12:00 1.89790195572960 -1.8624664 34.0219 /T 2024-Jul-15 15:00 1.89776926100561 -1.8134477 34.0530 /T 2024-Jul-15 18:00 1.89764011007616 -1.7642960 34.0841 /T 2024-Jul-15 21:00 1.89751451252829 -1.7150118 34.1152 /T 2024-Jul-16 00:00 1.89739247791256 -1.6655955 34.1463 /T 2024-Jul-16 03:00 1.89727401574265 -1.6160477 34.1773 /T 2024-Jul-16 06:00 1.89715913549501 -1.5663688 34.2082 /T 2024-Jul-16 09:00 1.89704784660844 -1.5165595 34.2392 /T 2024-Jul-16 12:00 1.89694015848374 -1.4666202 34.2701 /T 2024-Jul-16 15:00 1.89683608048322 -1.4165515 34.3009 /T 2024-Jul-16 18:00 1.89673562193034 -1.3663539 34.3318 /T 2024-Jul-16 21:00 1.89663879210925 -1.3160279 34.3626 /T 2024-Jul-17 00:00 1.89654560026430 -1.2655742 34.3933 /T 2024-Jul-17 03:00 1.89645605559960 -1.2149933 34.4240 /T 2024-Jul-17 06:00 1.89637016727852 -1.1642857 34.4547 /T 2024-Jul-17 09:00 1.89628794442318 -1.1134520 34.4854 /T 2024-Jul-17 12:00 1.89620939611391 -1.0624929 34.5160 /T 2024-Jul-17 15:00 1.89613453138872 -1.0114088 34.5465 /T 2024-Jul-17 18:00 1.89606335924275 -0.9602005 34.5770 /T 2024-Jul-17 21:00 1.89599588862761 -0.9088684 34.6075 /T 2024-Jul-18 00:00 1.89593212845088 -0.8574132 34.6379 /T 2024-Jul-18 03:00 1.89587208757539 -0.8058356 34.6683 /T 2024-Jul-18 06:00 1.89581577481862 -0.7541362 34.6987 /T 2024-Jul-18 09:00 1.89576319895201 -0.7023155 34.7290 /T 2024-Jul-18 12:00 1.89571436870028 -0.6503744 34.7593 /T 2024-Jul-18 15:00 1.89566929274070 -0.5983133 34.7895 /T 2024-Jul-18 18:00 1.89562797970237 -0.5461331 34.8196 /T 2024-Jul-18 21:00 1.89559043816545 -0.4938343 34.8498 /T 2024-Jul-19 00:00 1.89555667666040 -0.4414177 34.8798 /T 2024-Jul-19 03:00 1.89552670366715 -0.3888840 34.9099 /T 2024-Jul-19 06:00 1.89550052761432 -0.3362339 34.9398 /T 2024-Jul-19 09:00 1.89547815687836 -0.2834681 34.9698 /T 2024-Jul-19 12:00 1.89545959978273 -0.2305874 34.9997 /T 2024-Jul-19 15:00 1.89544486459698 -0.1775925 35.0295 /T 2024-Jul-19 18:00 1.89543395953589 -0.1244842 35.0593 /T 2024-Jul-19 21:00 1.89542689275860 -0.0712633 35.0890 /T 2024-Jul-20 00:00 1.89542367236763 -0.0179305 35.1187 /T 2024-Jul-20 03:00 1.89542430640804 0.0355133 35.1483 /T 2024-Jul-20 06:00 1.89542880286645 0.0890674 35.1779 /T 2024-Jul-20 09:00 1.89543716967012 0.1427309 35.2074 /T 2024-Jul-20 12:00 1.89544941468600 0.1965029 35.2369 /T 2024-Jul-20 15:00 1.89546554571982 0.2503827 35.2663 /T 2024-Jul-20 18:00 1.89548557051511 0.3043692 35.2956 /T 2024-Jul-20 21:00 1.89550949675230 0.3584618 35.3249 /T 2024-Jul-21 00:00 1.89553733204777 0.4126594 35.3542 /T 2024-Jul-21 03:00 1.89556908395293 0.4669611 35.3834 /T 2024-Jul-21 06:00 1.89560475995332 0.5213661 35.4125 /T 2024-Jul-21 09:00 1.89564436746771 0.5758734 35.4416 /T 2024-Jul-21 12:00 1.89568791384724 0.6304821 35.4706 /T 2024-Jul-21 15:00 1.89573540637454 0.6851912 35.4996 /T 2024-Jul-21 18:00 1.89578685226290 0.7399997 35.5285 /T 2024-Jul-21 21:00 1.89584225865548 0.7949067 35.5573 /T 2024-Jul-22 00:00 1.89590163262453 0.8499112 35.5861 /T 2024-Jul-22 03:00 1.89596498117062 0.9050122 35.6148 /T 2024-Jul-22 06:00 1.89603231122195 0.9602086 35.6435 /T 2024-Jul-22 09:00 1.89610362963368 1.0154995 35.6721 /T 2024-Jul-22 12:00 1.89617894318726 1.0708838 35.7006 /T 2024-Jul-22 15:00 1.89625825858987 1.1263605 35.7291 /T 2024-Jul-22 18:00 1.89634158247383 1.1819286 35.7575 /T 2024-Jul-22 21:00 1.89642892139615 1.2375871 35.7858 /T 2024-Jul-23 00:00 1.89652028183797 1.2933347 35.8141 /T 2024-Jul-23 03:00 1.89661567020422 1.3491706 35.8423 /T 2024-Jul-23 06:00 1.89671509282325 1.4050936 35.8704 /T 2024-Jul-23 09:00 1.89681855594644 1.4611027 35.8985 /T 2024-Jul-23 12:00 1.89692606574801 1.5171968 35.9265 /T 2024-Jul-23 15:00 1.89703762832475 1.5733748 35.9545 /T 2024-Jul-23 18:00 1.89715324969583 1.6296357 35.9824 /T 2024-Jul-23 21:00 1.89727293580275 1.6859783 36.0102 /T 2024-Jul-24 00:00 1.89739669250917 1.7424017 36.0379 /T 2024-Jul-24 03:00 1.89752452560094 1.7989046 36.0656 /T 2024-Jul-24 06:00 1.89765644078612 1.8554861 36.0932 /T 2024-Jul-24 09:00 1.89779244369501 1.9121451 36.1207 /T 2024-Jul-24 12:00 1.89793253988029 1.9688805 36.1482 /T 2024-Jul-24 15:00 1.89807673481712 2.0256912 36.1756 /T 2024-Jul-24 18:00 1.89822503390340 2.0825761 36.2029 /T 2024-Jul-24 21:00 1.89837744245996 2.1395342 36.2301 /T 2024-Jul-25 00:00 1.89853396573081 2.1965644 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 *******************************************************************************