******************************************************************************* JPL/HORIZONS 223P/Skiff 2024-May-12 14:28:50 Rec #:90001177 (+COV) Soln.date: 2023-Jan-14_00:13:32 # obs: 776 (2001-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2455806.5 ! 2011-Sep-02.0000000 (TDB) RMSW= n.a. EC= .4164328313225881 QR= 2.420478040050093 TP= 2455423.0196821457 OM= 346.8243007586665 W= 37.86179981478372 IN= 27.05438121745603 A= 4.147728265001319 MA= 44.74368081805038 ADIST= 5.874978489952544 PER= 8.447411422616501 N= .116677907 ANGMOM= .031851509 DAN= 2.58016 DDN= 5.10771 L= 21.5207363 B= 16.210057 MOID= 1.46893001 TP= 2010-Aug-14.5196821457 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.5 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= -3.906381726265E-9 A2= -4.947321140207E-12 A3= 6.399182230234E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#72, data arc: 2001-07-27 to 2021-03-19 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 12 14:28:50 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 223P/Skiff {source: JPL#72} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2026-Nov-01 00:00:00.0000 UT Stop time : A.D. 2026-Nov-14 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.240510.p240803 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-10. PREDICTS-> 2024-AUG-02 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= 2455806.5 ! 2011-Sep-02.0000000 (TDB) RMSW= n.a. EC= .4164328313225881 QR= 2.420478040050093 TP= 2455423.0196821457 OM= 346.8243007586665 W= 37.86179981478372 IN= 27.05438121745603 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.588497586938036E+00 Y= 2.106761317245298E+00 Z= 2.243083865798813E+00 VX=-9.890987105387909E-03 VY= 2.665947771288658E-04 VZ=-1.283577129573327E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.5 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= -3.906381726265E-9 A2= -4.947321140207E-12 A3= 6.399182230234E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2026-Nov-01 00:00 3.020169952647 -6.2994822 2026-Nov-01 03:00 3.019715231740 -6.2985074 2026-Nov-01 06:00 3.019260581253 -6.2975311 2026-Nov-01 09:00 3.018806001294 -6.2965532 2026-Nov-01 12:00 3.018351491971 -6.2955739 2026-Nov-01 15:00 3.017897053393 -6.2945931 2026-Nov-01 18:00 3.017442685668 -6.2936108 2026-Nov-01 21:00 3.016988388904 -6.2926269 2026-Nov-02 00:00 3.016534163210 -6.2916416 2026-Nov-02 03:00 3.016080008694 -6.2906547 2026-Nov-02 06:00 3.015625925466 -6.2896664 2026-Nov-02 09:00 3.015171913634 -6.2886765 2026-Nov-02 12:00 3.014717973306 -6.2876852 2026-Nov-02 15:00 3.014264104593 -6.2866923 2026-Nov-02 18:00 3.013810307602 -6.2856979 2026-Nov-02 21:00 3.013356582443 -6.2847020 2026-Nov-03 00:00 3.012902929225 -6.2837046 2026-Nov-03 03:00 3.012449348056 -6.2827056 2026-Nov-03 06:00 3.011995839048 -6.2817052 2026-Nov-03 09:00 3.011542402308 -6.2807032 2026-Nov-03 12:00 3.011089037946 -6.2796997 2026-Nov-03 15:00 3.010635746071 -6.2786947 2026-Nov-03 18:00 3.010182526794 -6.2776882 2026-Nov-03 21:00 3.009729380224 -6.2766802 2026-Nov-04 00:00 3.009276306470 -6.2756706 2026-Nov-04 03:00 3.008823305642 -6.2746595 2026-Nov-04 06:00 3.008370377850 -6.2736469 2026-Nov-04 09:00 3.007917523205 -6.2726328 2026-Nov-04 12:00 3.007464741816 -6.2716171 2026-Nov-04 15:00 3.007012033792 -6.2705999 2026-Nov-04 18:00 3.006559399245 -6.2695812 2026-Nov-04 21:00 3.006106838284 -6.2685610 2026-Nov-05 00:00 3.005654351020 -6.2675392 2026-Nov-05 03:00 3.005201937564 -6.2665159 2026-Nov-05 06:00 3.004749598024 -6.2654911 2026-Nov-05 09:00 3.004297332513 -6.2644647 2026-Nov-05 12:00 3.003845141140 -6.2634368 2026-Nov-05 15:00 3.003393024017 -6.2624074 2026-Nov-05 18:00 3.002940981253 -6.2613764 2026-Nov-05 21:00 3.002489012961 -6.2603439 2026-Nov-06 00:00 3.002037119249 -6.2593098 2026-Nov-06 03:00 3.001585300231 -6.2582742 2026-Nov-06 06:00 3.001133556016 -6.2572371 2026-Nov-06 09:00 3.000681886715 -6.2561985 2026-Nov-06 12:00 3.000230292441 -6.2551582 2026-Nov-06 15:00 2.999778773303 -6.2541165 2026-Nov-06 18:00 2.999327329414 -6.2530732 2026-Nov-06 21:00 2.998875960884 -6.2520284 2026-Nov-07 00:00 2.998424667826 -6.2509820 2026-Nov-07 03:00 2.997973450350 -6.2499341 2026-Nov-07 06:00 2.997522308569 -6.2488846 2026-Nov-07 09:00 2.997071242593 -6.2478336 2026-Nov-07 12:00 2.996620252535 -6.2467810 2026-Nov-07 15:00 2.996169338506 -6.2457268 2026-Nov-07 18:00 2.995718500619 -6.2446712 2026-Nov-07 21:00 2.995267738985 -6.2436139 2026-Nov-08 00:00 2.994817053716 -6.2425552 2026-Nov-08 03:00 2.994366444925 -6.2414948 2026-Nov-08 06:00 2.993915912723 -6.2404329 2026-Nov-08 09:00 2.993465457223 -6.2393695 2026-Nov-08 12:00 2.993015078537 -6.2383045 2026-Nov-08 15:00 2.992564776778 -6.2372379 2026-Nov-08 18:00 2.992114552057 -6.2361698 2026-Nov-08 21:00 2.991664404488 -6.2351001 2026-Nov-09 00:00 2.991214334183 -6.2340288 2026-Nov-09 03:00 2.990764341254 -6.2329560 2026-Nov-09 06:00 2.990314425815 -6.2318816 2026-Nov-09 09:00 2.989864587978 -6.2308057 2026-Nov-09 12:00 2.989414827857 -6.2297282 2026-Nov-09 15:00 2.988965145563 -6.2286491 2026-Nov-09 18:00 2.988515541211 -6.2275685 2026-Nov-09 21:00 2.988066014913 -6.2264863 2026-Nov-10 00:00 2.987616566782 -6.2254025 2026-Nov-10 03:00 2.987167196931 -6.2243171 2026-Nov-10 06:00 2.986717905475 -6.2232302 2026-Nov-10 09:00 2.986268692526 -6.2221417 2026-Nov-10 12:00 2.985819558198 -6.2210517 2026-Nov-10 15:00 2.985370502604 -6.2199600 2026-Nov-10 18:00 2.984921525858 -6.2188668 2026-Nov-10 21:00 2.984472628074 -6.2177720 2026-Nov-11 00:00 2.984023809364 -6.2166757 2026-Nov-11 03:00 2.983575069844 -6.2155777 2026-Nov-11 06:00 2.983126409627 -6.2144782 2026-Nov-11 09:00 2.982677828827 -6.2133771 2026-Nov-11 12:00 2.982229327558 -6.2122744 2026-Nov-11 15:00 2.981780905934 -6.2111701 2026-Nov-11 18:00 2.981332564069 -6.2100643 2026-Nov-11 21:00 2.980884302078 -6.2089568 2026-Nov-12 00:00 2.980436120074 -6.2078478 2026-Nov-12 03:00 2.979988018173 -6.2067372 2026-Nov-12 06:00 2.979539996488 -6.2056250 2026-Nov-12 09:00 2.979092055135 -6.2045112 2026-Nov-12 12:00 2.978644194227 -6.2033958 2026-Nov-12 15:00 2.978196413879 -6.2022789 2026-Nov-12 18:00 2.977748714207 -6.2011603 2026-Nov-12 21:00 2.977301095324 -6.2000402 2026-Nov-13 00:00 2.976853557347 -6.1989184 2026-Nov-13 03:00 2.976406100389 -6.1977951 2026-Nov-13 06:00 2.975958724566 -6.1966702 2026-Nov-13 09:00 2.975511429992 -6.1955437 2026-Nov-13 12:00 2.975064216784 -6.1944155 2026-Nov-13 15:00 2.974617085056 -6.1932858 2026-Nov-13 18:00 2.974170034924 -6.1921545 2026-Nov-13 21:00 2.973723066502 -6.1910216 2026-Nov-14 00:00 2.973276179907 -6.1898871 $$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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90001177' START_TIME = '2026-Nov-01' STOP_TIME = '2026-Nov-14' STEP_SIZE = '3 hours' QUANTITIES = '19'