******************************************************************************* JPL/HORIZONS PANSTARRS (C/2017 K2) 2024-May-20 11:50:59 Rec #:90004410 (+COV) Soln.date: 2024-May-07_13:42:21 # obs: 2062 (2013-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459329.5 ! 2021-Apr-25.0000000 (TDB) RMSW= n.a. EC= 1.000535772980367 QR= 1.797685223434788 TP= 2459933.2797761173 OM= 88.24647445961963 W= 236.1871953433862 IN= 87.55139001918343 A= -3355.311464574771 MA= -.003061846220956608ADIST= 9.999999E99 PER= 9.999999E99 N= 5.071E-6 ANGMOM= .032622063 DAN= 8.114100000000001 DDN= 2.31011 L= 271.8963389 B= -56.1091662 MOID= 1.09173 TP= 2022-Dec-19.7797761173 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= 3.416313648224E-8 A2= -7.056936621666E-9 A3= -9.07410800457E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#129, data arc: 2013-05-12 to 2024-04-28 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Mon May 20 11:50:59 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: PANSTARRS (C/2017 K2) {source: JPL#129} Center body name: Sun (10) {source: DE441} Center-site name: BODYCENTRIC ******************************************************************************* Start time : A.D. 2023-Feb-01 00:00:00.0000 UT Stop time : A.D. 2023-Feb-15 00:00:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -695700.0 {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 : IAU_SUN {East-longitude positive} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : None 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.240517.p240810 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-17. PREDICTS-> 2024-AUG-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 n.a. , 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= 2459329.5 ! 2021-Apr-25.0000000 (TDB) RMSW= n.a. EC= 1.000535772980367 QR= 1.797685223434788 TP= 2459933.2797761173 OM= 88.24647445961963 W= 236.1871953433862 IN= 87.55139001918343 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.412677182689189E-01 Y=-5.202561610097790E+00 Z= 3.937343829986496E+00 VX= 3.954777737475936E-04 VY= 3.444495758565750E-03 VZ=-8.868550240825866E-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= 3.416313648224E-8 A2= -7.056936621666E-9 A3= -9.07410800457E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot RNG_3sigma RNGRT_3sig ************************************************************************* $$SOE 2023-Feb-01 00:00 1.880377800702 6.4719392 470.7521 0.0000511 2023-Feb-02 00:00 1.884153635696 6.6035563 465.3473 0.0000509 2023-Feb-03 00:00 1.888005168899 6.7340852 460.0338 0.0000507 2023-Feb-04 00:00 1.891931768460 6.8635145 454.8149 0.0000505 2023-Feb-05 00:00 1.895932796211 6.9918336 449.6940 0.0000503 2023-Feb-06 00:00 1.900007608048 7.1190327 444.6743 0.0000501 2023-Feb-07 00:00 1.904155554307 7.2451024 439.7589 0.0000499 2023-Feb-08 00:00 1.908375980138 7.3700339 434.9509 0.0000497 2023-Feb-09 00:00 1.912668225873 7.4938194 430.2535 0.0000495 2023-Feb-10 00:00 1.917031627393 7.6164514 425.6695 0.0000493 2023-Feb-11 00:00 1.921465516483 7.7379231 421.2019 0.0000491 2023-Feb-12 00:00 1.925969221195 7.8582284 416.8534 0.0000490 2023-Feb-13 00:00 1.930542066190 7.9773616 412.6268 0.0000488 2023-Feb-14 00:00 1.935183373085 8.0953179 408.5245 0.0000486 2023-Feb-15 00:00 1.939892460793 8.2120927 404.5492 0.0000485 $$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. '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 '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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF CENTER = '@Sun' COMMAND = '2017 K2' QUANTITIES = '19,39' START_TIME = '2023-02-01' STEP_SIZE = '1 day' STOP_TIME = '2023-02-15'