******************************************************************************* JPL/HORIZONS 252P/LINEAR 2024-May-01 20:30:03 Rec #:90001210 (+COV) Soln.date: 2021-Sep-07_14:01:25 # obs: 122 (2016-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457552.5 ! 2016-Jun-13.0000000 (TDB) RMSW= n.a. EC= .6730850153945767 QR= .9960459017518296 TP= 2457462.7635453758 OM= 190.9484957698451 W= 343.3104746438897 IN= 10.42219597127401 A= 3.046804058107117 MA= 16.63053394159559 ADIST= 5.097562214462405 PER= 5.3183264328543 N= .185326398 ANGMOM= .0222065 DAN= 1.01322 DDN= 4.69073 L= 174.5193624 B= -2.9779644 MOID= .0122062 TP= 2016-Mar-15.2635453758 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 16.4 M2= n.a. k1= 16.5 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= 1.085035562515E-8 A2= -7.189434766769E-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#K212/2, data arc: 2016-04-05 to 2021-08-29 2: k1=16.5;Not valid before 2016-04-01 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 1 20:30:03 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 252P/LINEAR {source: JPL#K212/2} 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.240501.p240725 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-01. PREDICTS-> 2024-JUL-24 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= 2457552.5 ! 2016-Jun-13.0000000 (TDB) RMSW= n.a. EC= .6730850153945767 QR= .9960459017518296 TP= 2457462.7635453758 OM= 190.9484957698451 W= 343.3104746438897 IN= 10.42219597127401 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.392663024954682E-01 Y=-1.463438196413681E+00 Z=-3.553003901170864E-01 VX= 1.206748177096199E-02 VY=-1.163321839504289E-02 VZ=-2.303016238176080E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 16.4 M2= n.a. k1= 16.5 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= 1.085035562515E-8 A2= -7.189434766769E-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 2026-Nov-01 00:00 1.008182978322 -2.3203404 2026-Nov-01 03:00 1.008016974850 -2.2785143 2026-Nov-01 06:00 1.007853992079 -2.2366574 2026-Nov-01 09:00 1.007694032212 -2.1947703 2026-Nov-01 12:00 1.007537097407 -2.1528535 2026-Nov-01 15:00 1.007383189785 -2.1109076 2026-Nov-01 18:00 1.007232311429 -2.0689331 2026-Nov-01 21:00 1.007084464379 -2.0269307 2026-Nov-02 00:00 1.006939650638 -1.9849007 2026-Nov-02 03:00 1.006797872169 -1.9428439 2026-Nov-02 06:00 1.006659130893 -1.9007606 2026-Nov-02 09:00 1.006523428694 -1.8586516 2026-Nov-02 12:00 1.006390767414 -1.8165173 2026-Nov-02 15:00 1.006261148855 -1.7743583 2026-Nov-02 18:00 1.006134574779 -1.7321752 2026-Nov-02 21:00 1.006011046907 -1.6899685 2026-Nov-03 00:00 1.005890566921 -1.6477388 2026-Nov-03 03:00 1.005773136460 -1.6054866 2026-Nov-03 06:00 1.005658757124 -1.5632126 2026-Nov-03 09:00 1.005547430472 -1.5209172 2026-Nov-03 12:00 1.005439158023 -1.4786011 2026-Nov-03 15:00 1.005333941252 -1.4362648 2026-Nov-03 18:00 1.005231781597 -1.3939088 2026-Nov-03 21:00 1.005132680452 -1.3515339 2026-Nov-04 00:00 1.005036639170 -1.3091404 2026-Nov-04 03:00 1.004943659065 -1.2667291 2026-Nov-04 06:00 1.004853741407 -1.2243004 2026-Nov-04 09:00 1.004766887426 -1.1818549 2026-Nov-04 12:00 1.004683098310 -1.1393933 2026-Nov-04 15:00 1.004602375205 -1.0969161 2026-Nov-04 18:00 1.004524719218 -1.0544238 2026-Nov-04 21:00 1.004450131411 -1.0119171 2026-Nov-05 00:00 1.004378612805 -0.9693965 2026-Nov-05 03:00 1.004310164381 -0.9268626 2026-Nov-05 06:00 1.004244787076 -0.8843161 2026-Nov-05 09:00 1.004182481787 -0.8417573 2026-Nov-05 12:00 1.004123249367 -0.7991871 2026-Nov-05 15:00 1.004067090629 -0.7566058 2026-Nov-05 18:00 1.004014006343 -0.7140142 2026-Nov-05 21:00 1.003963997237 -0.6714128 2026-Nov-06 00:00 1.003917063996 -0.6288021 2026-Nov-06 03:00 1.003873207265 -0.5861829 2026-Nov-06 06:00 1.003832427644 -0.5435555 2026-Nov-06 09:00 1.003794725693 -0.5009207 2026-Nov-06 12:00 1.003760101929 -0.4582791 2026-Nov-06 15:00 1.003728556826 -0.4156311 2026-Nov-06 18:00 1.003700090817 -0.3729775 2026-Nov-06 21:00 1.003674704292 -0.3303187 2026-Nov-07 00:00 1.003652397598 -0.2876554 2026-Nov-07 03:00 1.003633171041 -0.2449881 2026-Nov-07 06:00 1.003617024882 -0.2023175 2026-Nov-07 09:00 1.003603959343 -0.1596441 2026-Nov-07 12:00 1.003593974602 -0.1169685 2026-Nov-07 15:00 1.003587070793 -0.0742914 2026-Nov-07 18:00 1.003583248010 -0.0316132 2026-Nov-07 21:00 1.003582506304 0.0110653 2026-Nov-08 00:00 1.003584845682 0.0537437 2026-Nov-08 03:00 1.003590266110 0.0964214 2026-Nov-08 06:00 1.003598767510 0.1390977 2026-Nov-08 09:00 1.003610349765 0.1817720 2026-Nov-08 12:00 1.003625012712 0.2244438 2026-Nov-08 15:00 1.003642756146 0.2671125 2026-Nov-08 18:00 1.003663579822 0.3097776 2026-Nov-08 21:00 1.003687483449 0.3524383 2026-Nov-09 00:00 1.003714466697 0.3950941 2026-Nov-09 03:00 1.003744529191 0.4377445 2026-Nov-09 06:00 1.003777670516 0.4803888 2026-Nov-09 09:00 1.003813890212 0.5230265 2026-Nov-09 12:00 1.003853187779 0.5656570 2026-Nov-09 15:00 1.003895562674 0.6082797 2026-Nov-09 18:00 1.003941014311 0.6508940 2026-Nov-09 21:00 1.003989542063 0.6934993 2026-Nov-10 00:00 1.004041145259 0.7360950 2026-Nov-10 03:00 1.004095823188 0.7786806 2026-Nov-10 06:00 1.004153575096 0.8212555 2026-Nov-10 09:00 1.004214400186 0.8638190 2026-Nov-10 12:00 1.004278297620 0.9063707 2026-Nov-10 15:00 1.004345266519 0.9489099 2026-Nov-10 18:00 1.004415305960 0.9914360 2026-Nov-10 21:00 1.004488414978 1.0339485 2026-Nov-11 00:00 1.004564592569 1.0764468 2026-Nov-11 03:00 1.004643837685 1.1189303 2026-Nov-11 06:00 1.004726149236 1.1613984 2026-Nov-11 09:00 1.004811526092 1.2038506 2026-Nov-11 12:00 1.004899967081 1.2462863 2026-Nov-11 15:00 1.004991470987 1.2887049 2026-Nov-11 18:00 1.005086036557 1.3311058 2026-Nov-11 21:00 1.005183662492 1.3734885 2026-Nov-12 00:00 1.005284347456 1.4158523 2026-Nov-12 03:00 1.005388090069 1.4581968 2026-Nov-12 06:00 1.005494888910 1.5005213 2026-Nov-12 09:00 1.005604742518 1.5428253 2026-Nov-12 12:00 1.005717649390 1.5851082 2026-Nov-12 15:00 1.005833607983 1.6273695 2026-Nov-12 18:00 1.005952616713 1.6696085 2026-Nov-12 21:00 1.006074673955 1.7118248 2026-Nov-13 00:00 1.006199778044 1.7540177 2026-Nov-13 03:00 1.006327927272 1.7961867 2026-Nov-13 06:00 1.006459119895 1.8383313 2026-Nov-13 09:00 1.006593354124 1.8804508 2026-Nov-13 12:00 1.006730628132 1.9225448 2026-Nov-13 15:00 1.006870940053 1.9646126 2026-Nov-13 18:00 1.007014287979 2.0066537 2026-Nov-13 21:00 1.007160669963 2.0486676 2026-Nov-14 00:00 1.007310084017 2.0906537 $$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 = 'DES=252P;CAP' START_TIME = '2026-Nov-01' STOP_TIME = '2026-Nov-14' STEP_SIZE = '3 hours' QUANTITIES = '19'