******************************************************************************* JPL/HORIZONS 246P/NEAT 2025-Dec-12 17:42:24 Rec #:90001210 (+COV) Soln.date: 2024-Dec-26_20:12:42 # obs: 4914 (2002-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456433.5 ! 2013-May-21.0000000 (TDB) RMSW= n.a. EC= .2850444639370089 QR= 2.879720473538091 TP= 2456321.1343433694 OM= 78.78053597811052 W= 176.1717184406548 IN= 15.9717159509834 A= 4.027831561939782 MA= 13.70032018066711 ADIST= 5.175942650341472 PER= 8.083792426948801 N= .121926224 ANGMOM= .033091442 DAN= 5.17134 DDN= 2.88115 L= 255.0996207 B= 1.0526763 MOID= 1.86524999 TP= 2013-Jan-28.6343433694 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.9 M2= 11.3 k1= 14.75 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= 1.209538936615E-8 A2= 4.494141936302E-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#263, data arc: 2002-01-06 to 2024-12-07 2: k1=14.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:42:24 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 246P/NEAT {source: JPL#263} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2029-Oct-21 00:00:00.0000 UT Stop time : A.D. 2029-Nov-03 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.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= 2456433.5 ! 2013-May-21.0000000 (TDB) RMSW= n.a. EC= .2850444639370089 QR= 2.879720473538091 TP= 2456321.1343433694 OM= 78.78053597811052 W= 176.1717184406548 IN= 15.9717159509834 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 4.839508365912379E-01 Y=-2.530916185432512E+00 Z=-1.420609806968873E+00 VX= 1.084908140312811E-02 VY= 2.119990604863425E-03 VZ=-2.339010411713964E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.9 M2= 11.3 k1= 14.75 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= 1.209538936615E-8 A2= 4.494141936302E-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 ************************************************** $$SOE 2029-Oct-21 00:00 3.480342681563 -0.0645847 2029-Oct-21 03:00 3.480338057464 -0.0635246 2029-Oct-21 06:00 3.480333509896 -0.0624644 2029-Oct-21 09:00 3.480329038859 -0.0614043 2029-Oct-21 12:00 3.480324644354 -0.0603441 2029-Oct-21 15:00 3.480320326381 -0.0592840 2029-Oct-21 18:00 3.480316084941 -0.0582238 2029-Oct-21 21:00 3.480311920035 -0.0571636 2029-Oct-22 00:00 3.480307831662 -0.0561034 2029-Oct-22 03:00 3.480303819824 -0.0550432 2029-Oct-22 06:00 3.480299884521 -0.0539830 2029-Oct-22 09:00 3.480296025754 -0.0529228 2029-Oct-22 12:00 3.480292243522 -0.0518626 2029-Oct-22 15:00 3.480288537827 -0.0508024 2029-Oct-22 18:00 3.480284908668 -0.0497422 2029-Oct-22 21:00 3.480281356047 -0.0486820 2029-Oct-23 00:00 3.480277879963 -0.0476217 2029-Oct-23 03:00 3.480274480417 -0.0465615 2029-Oct-23 06:00 3.480271157410 -0.0455013 2029-Oct-23 09:00 3.480267910942 -0.0444410 2029-Oct-23 12:00 3.480264741012 -0.0433808 2029-Oct-23 15:00 3.480261647622 -0.0423205 2029-Oct-23 18:00 3.480258630772 -0.0412602 2029-Oct-23 21:00 3.480255690462 -0.0402000 2029-Oct-24 00:00 3.480252826692 -0.0391397 2029-Oct-24 03:00 3.480250039464 -0.0380794 2029-Oct-24 06:00 3.480247328776 -0.0370192 2029-Oct-24 09:00 3.480244694629 -0.0359589 2029-Oct-24 12:00 3.480242137024 -0.0348986 2029-Oct-24 15:00 3.480239655961 -0.0338383 2029-Oct-24 18:00 3.480237251440 -0.0327780 2029-Oct-24 21:00 3.480234923461 -0.0317177 2029-Oct-25 00:00 3.480232672024 -0.0306574 2029-Oct-25 03:00 3.480230497130 -0.0295971 2029-Oct-25 06:00 3.480228398779 -0.0285368 2029-Oct-25 09:00 3.480226376971 -0.0274765 2029-Oct-25 12:00 3.480224431706 -0.0264162 2029-Oct-25 15:00 3.480222562984 -0.0253559 2029-Oct-25 18:00 3.480220770805 -0.0242956 2029-Oct-25 21:00 3.480219055170 -0.0232353 2029-Oct-26 00:00 3.480217416079 -0.0221750 2029-Oct-26 03:00 3.480215853531 -0.0211147 2029-Oct-26 06:00 3.480214367527 -0.0200544 2029-Oct-26 09:00 3.480212958067 -0.0189941 2029-Oct-26 12:00 3.480211625151 -0.0179338 2029-Oct-26 15:00 3.480210368778 -0.0168735 2029-Oct-26 18:00 3.480209188950 -0.0158132 2029-Oct-26 21:00 3.480208085665 -0.0147529 2029-Oct-27 00:00 3.480207058925 -0.0136926 2029-Oct-27 03:00 3.480206108728 -0.0126322 2029-Oct-27 06:00 3.480205235075 -0.0115719 2029-Oct-27 09:00 3.480204437966 -0.0105116 2029-Oct-27 12:00 3.480203717401 -0.0094513 2029-Oct-27 15:00 3.480203073379 -0.0083910 2029-Oct-27 18:00 3.480202505901 -0.0073307 2029-Oct-27 21:00 3.480202014966 -0.0062704 2029-Oct-28 00:00 3.480201600575 -0.0052101 2029-Oct-28 03:00 3.480201262728 -0.0041498 2029-Oct-28 06:00 3.480201001423 -0.0030895 2029-Oct-28 09:00 3.480200816661 -0.0020292 2029-Oct-28 12:00 3.480200708442 -0.0009689 2029-Oct-28 15:00 3.480200676766 0.0000914 2029-Oct-28 18:00 3.480200721633 0.0011516 2029-Oct-28 21:00 3.480200843041 0.0022119 2029-Oct-29 00:00 3.480201040992 0.0032722 2029-Oct-29 03:00 3.480201315484 0.0043325 2029-Oct-29 06:00 3.480201666518 0.0053928 2029-Oct-29 09:00 3.480202094094 0.0064530 2029-Oct-29 12:00 3.480202598210 0.0075133 2029-Oct-29 15:00 3.480203178868 0.0085735 2029-Oct-29 18:00 3.480203836066 0.0096338 2029-Oct-29 21:00 3.480204569804 0.0106941 2029-Oct-30 00:00 3.480205380081 0.0117543 2029-Oct-30 03:00 3.480206266899 0.0128145 2029-Oct-30 06:00 3.480207230255 0.0138748 2029-Oct-30 09:00 3.480208270151 0.0149350 2029-Oct-30 12:00 3.480209386585 0.0159952 2029-Oct-30 15:00 3.480210579557 0.0170555 2029-Oct-30 18:00 3.480211849067 0.0181157 2029-Oct-30 21:00 3.480213195114 0.0191759 2029-Oct-31 00:00 3.480214617697 0.0202361 2029-Oct-31 03:00 3.480216116818 0.0212963 2029-Oct-31 06:00 3.480217692474 0.0223565 2029-Oct-31 09:00 3.480219344666 0.0234166 2029-Oct-31 12:00 3.480221073392 0.0244768 2029-Oct-31 15:00 3.480222878654 0.0255370 2029-Oct-31 18:00 3.480224760449 0.0265971 2029-Oct-31 21:00 3.480226718778 0.0276573 2029-Nov-01 00:00 3.480228753640 0.0287174 2029-Nov-01 03:00 3.480230865034 0.0297776 2029-Nov-01 06:00 3.480233052960 0.0308377 2029-Nov-01 09:00 3.480235317418 0.0318978 2029-Nov-01 12:00 3.480237658406 0.0329580 2029-Nov-01 15:00 3.480240075924 0.0340181 2029-Nov-01 18:00 3.480242569972 0.0350782 2029-Nov-01 21:00 3.480245140549 0.0361382 2029-Nov-02 00:00 3.480247787654 0.0371983 2029-Nov-02 03:00 3.480250511287 0.0382584 2029-Nov-02 06:00 3.480253311446 0.0393184 2029-Nov-02 09:00 3.480256188132 0.0403785 2029-Nov-02 12:00 3.480259141344 0.0414385 2029-Nov-02 15:00 3.480262171080 0.0424986 2029-Nov-02 18:00 3.480265277341 0.0435586 2029-Nov-02 21:00 3.480268460125 0.0446186 2029-Nov-03 00:00 3.480271719432 0.0456786 $$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. '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 = '246P' QUANTITIES = '19' START_TIME = '2029-Oct-21' STEP_SIZE = '3 hours' STOP_TIME = '2029-Nov-03'