******************************************************************************* JPL/HORIZONS PANSTARRS (C/2017 K2) 2025-Dec-12 17:50:52 Rec #:90004437 (+COV) Soln.date: 2025-Dec-12_11:12:30 # obs: 3219 (2013-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459453.5 ! 2021-Aug-27.0000000 (TDB) RMSW= n.a. EC= 1.000616610296381 QR= 1.797358586358627 TP= 2459933.2330854931 OM= 88.24135080911886 W= 236.1908235130619 IN= 87.55453569028981 A= -2914.902000352314 MA= -.003004469556315987ADIST= 9.999999E99 PER= 9.999999E99 N= 6.263E-6 ANGMOM= .032619759 DAN= 8.11281 DDN= 2.3098 L= 271.8870398 B= -56.1129839 MOID= 1.09150004 TP= 2022-Dec-19.7330854931 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 4.5 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= 1.857391476631E-8 A2= -1.439783871174E-9 A3= -1.118039727211E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#178, data arc: 2013-05-12 to 2025-12-10 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:50:52 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: PANSTARRS (C/2017 K2) {source: JPL#178} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2022-Jul-11 00:00:00.0000 UT Stop time : A.D. 2022-Jul-17 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= 2459453.5 ! 2021-Aug-27.0000000 (TDB) RMSW= n.a. EC= 1.000616610296381 QR= 1.797358586358627 TP= 2459933.2330854931 OM= 88.24135080911886 W= 236.1908235130619 IN= 87.55453569028981 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-2.891491056185286E-01 Y=-4.726697720947358E+00 Z= 2.803497554442568E+00 VX= 4.484239356255326E-04 VY= 4.289917137380199E-03 VZ=-9.436074662441197E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 4.5 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= 1.857391476631E-8 A2= -1.439783871174E-9 A3= -1.118039727211E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN delta deldot RNG_3sigma RNGRT_3sig ************************************************************************** $$SOE 2022-Jul-11 00:00 1.81000821853319 -2.2221978 787.3234 0.0000275 2022-Jul-11 03:00 1.80985103453649 -2.1320874 787.5424 0.0000275 2022-Jul-11 06:00 1.80970035242659 -2.0420847 787.7601 0.0000275 2022-Jul-11 09:00 1.80955616439668 -1.9521905 787.9767 0.0000275 2022-Jul-11 12:00 1.80941846257406 -1.8624058 788.1921 0.0000276 2022-Jul-11 15:00 1.80928723902105 -1.7727316 788.4063 0.0000276 2022-Jul-11 18:00 1.80916248573593 -1.6831685 788.6193 0.0000276 2022-Jul-11 21:00 1.80904419465374 -1.5937176 788.8311 0.0000276 2022-Jul-12 00:00 1.80893235764703 -1.5043797 789.0417 0.0000276 2022-Jul-12 03:00 1.80882696652655 -1.4151557 789.2511 0.0000276 2022-Jul-12 06:00 1.80872801304178 -1.3260463 789.4593 0.0000277 2022-Jul-12 09:00 1.80863548888144 -1.2370525 789.6663 0.0000277 2022-Jul-12 12:00 1.80854938567389 -1.1481751 789.8721 0.0000277 2022-Jul-12 15:00 1.80846969498733 -1.0594148 790.0767 0.0000277 2022-Jul-12 18:00 1.80839640833010 -0.9707726 790.2802 0.0000277 2022-Jul-12 21:00 1.80832951715066 -0.8822492 790.4824 0.0000277 2022-Jul-13 00:00 1.80826901283763 -0.7938455 790.6835 0.0000278 2022-Jul-13 03:00 1.80821488671963 -0.7055623 790.8834 0.0000278 2022-Jul-13 06:00 1.80816713006506 -0.6174005 791.0820 0.0000278 2022-Jul-13 09:00 1.80812573408176 -0.5293608 791.2795 0.0000278 2022-Jul-13 12:00 1.80809068991663 -0.4414442 791.4758 0.0000278 2022-Jul-13 15:00 1.80806198865504 -0.3536515 791.6709 0.0000278 2022-Jul-13 18:00 1.80803962132023 -0.2659836 791.8649 0.0000279 2022-Jul-13 21:00 1.80802357887264 -0.1784413 792.0576 0.0000279 2022-Jul-14 00:00 1.80801385220910 -0.0910255 792.2492 0.0000279 2022-Jul-14 03:00 1.80801043216195 -0.0037371 792.4396 0.0000279 2022-Jul-14 06:00 1.80801330949813 0.0834229 792.6288 0.0000279 2022-Jul-14 09:00 1.80802247491817 0.1704537 792.8168 0.0000279 2022-Jul-14 12:00 1.80803791905512 0.2573542 793.0036 0.0000280 2022-Jul-14 15:00 1.80805963247346 0.3441236 793.1893 0.0000280 2022-Jul-14 18:00 1.80808760566794 0.4307608 793.3738 0.0000280 2022-Jul-14 21:00 1.80812182906239 0.5172650 793.5571 0.0000280 2022-Jul-15 00:00 1.80816229300851 0.6036350 793.7393 0.0000280 2022-Jul-15 03:00 1.80820898778462 0.6898698 793.9202 0.0000280 2022-Jul-15 06:00 1.80826190359444 0.7759684 794.1001 0.0000281 2022-Jul-15 09:00 1.80832103056581 0.8619298 794.2787 0.0000281 2022-Jul-15 12:00 1.80838635874947 0.9477528 794.4562 0.0000281 2022-Jul-15 15:00 1.80845787811778 1.0334364 794.6325 0.0000281 2022-Jul-15 18:00 1.80853557856355 1.1189794 794.8077 0.0000281 2022-Jul-15 21:00 1.80861944989879 1.2043808 794.9817 0.0000282 2022-Jul-16 00:00 1.80870948185359 1.2896394 795.1545 0.0000282 2022-Jul-16 03:00 1.80880566407495 1.3747540 795.3262 0.0000282 2022-Jul-16 06:00 1.80890798612569 1.4597234 795.4968 0.0000282 2022-Jul-16 09:00 1.80901643748344 1.5445466 795.6661 0.0000282 2022-Jul-16 12:00 1.80913100753960 1.6292222 795.8344 0.0000282 2022-Jul-16 15:00 1.80925168559841 1.7137490 796.0015 0.0000283 2022-Jul-16 18:00 1.80937846087606 1.7981259 796.1675 0.0000283 2022-Jul-16 21:00 1.80951132249988 1.8823515 796.3323 0.0000283 2022-Jul-17 00:00 1.80965025950756 1.9664247 796.4960 0.0000283 $$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. '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 '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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '2017 K2' QUANTITIES = '20,39' START_TIME = '2022-Jul-11' STEP_SIZE = '3 hours' STOP_TIME = '2022-Jul-17'