******************************************************************************* JPL/HORIZONS PANSTARRS (C/2017 K2) 2024-Apr-23 18:09:58 Rec #:90004410 (+COV) Soln.date: 2024-Apr-20_20:42:19 # obs: 2041 (2013-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459327.5 ! 2021-Apr-23.0000000 (TDB) RMSW= n.a. EC= 1.000534623210982 QR= 1.797690538475346 TP= 2459933.280597426 OM= 88.2465836527569 W= 236.1871388213125 IN= 87.55132860421929 A= -3362.537393715938 MA= -.003062095625405481ADIST= 9.999999E99 PER= 9.999999E99 N= 5.055E-6 ANGMOM= .032622102 DAN= 8.11412 DDN= 2.31012 L= 271.8965316 B= -56.109106 MOID= 1.09173 TP= 2022-Dec-19.7805974260 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.7 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= 3.428794384003E-8 A2= -7.044042348862E-9 A3= -9.05951321125E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#127, data arc: 2013-05-12 to 2024-04-20 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Tue Apr 23 18:09:58 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: PANSTARRS (C/2017 K2) {source: JPL#127} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2022-Jan-10 00:00:00.0000 UT Stop time : A.D. 2022-Jan-13 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.240423.p240717 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-23. PREDICTS-> 2024-JUL-16 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= 2459327.5 ! 2021-Apr-23.0000000 (TDB) RMSW= n.a. EC= 1.000534623210982 QR= 1.797690538475346 TP= 2459933.280597426 OM= 88.2465836527569 W= 236.1871388213125 IN= 87.55132860421929 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.420579310417761E-01 Y=-5.209439385178198E+00 Z= 3.955072393427979E+00 VX= 3.947654497744130E-04 VY= 3.433472762957008E-03 VZ=-8.860202418688496E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.7 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= 3.428794384003E-8 A2= -7.044042348862E-9 A3= -9.05951321125E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN delta deldot *************************************************** $$SOE 2022-Jan-10 00:00 5.02431992864388 -21.1641163 2022-Jan-10 03:00 5.02279049789125 -21.2042454 2022-Jan-10 06:00 5.02125817040179 -21.2443617 2022-Jan-10 09:00 5.01972294710157 -21.2844652 2022-Jan-10 12:00 5.01818482891770 -21.3245558 2022-Jan-10 15:00 5.01664381677824 -21.3646335 2022-Jan-10 18:00 5.01509991161230 -21.4046984 2022-Jan-10 21:00 5.01355311434992 -21.4447504 2022-Jan-11 00:00 5.01200342592217 -21.4847894 2022-Jan-11 03:00 5.01045084726107 -21.5248156 2022-Jan-11 06:00 5.00889537929968 -21.5648288 2022-Jan-11 09:00 5.00733702297200 -21.6048291 2022-Jan-11 12:00 5.00577577921305 -21.6448164 2022-Jan-11 15:00 5.00421164895879 -21.6847908 2022-Jan-11 18:00 5.00264463314624 -21.7247522 2022-Jan-11 21:00 5.00107473271334 -21.7647005 2022-Jan-12 00:00 4.99950194859902 -21.8046359 2022-Jan-12 03:00 4.99792628174318 -21.8445582 2022-Jan-12 06:00 4.99634773308666 -21.8844675 2022-Jan-12 09:00 4.99476630357128 -21.9243637 2022-Jan-12 12:00 4.99318199413975 -21.9642469 2022-Jan-12 15:00 4.99159480573569 -22.0041170 2022-Jan-12 18:00 4.99000473930360 -22.0439740 2022-Jan-12 21:00 4.98841179578884 -22.0838179 2022-Jan-13 00:00 4.98681597613756 -22.1236487 $$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 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 ******************************************************************************* !$$SOF COMMAND = '2017 K2' START_TIME = '2022-01-10' STOP_TIME = '2022-01-13' STEP_SIZE = '3 hours' QUANTITIES = '20'