******************************************************************************* JPL/HORIZONS 19P/Borrelly 2024-May-06 21:30:24 Rec #:90000304 (+COV) Soln.date: 2024-Apr-22_10:21:16 # obs: 2445 (2014-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459277.5 ! 2021-Mar-04.0000000 (TDB) RMSW= n.a. EC= .6379169523065308 QR= 1.30602082303394 TP= 2459612.2631662302 OM= 74.30163917249709 W= 351.8611443404037 IN= 29.31902980947663 A= 3.606964842329724 MA= 311.8352980769099 ADIST= 5.907908861625508 PER= 6.8504809988753 N= .143876946 ANGMOM= .025159525 DAN= 1.31116 DDN= 5.8049 L= 67.1938849 B= -3.9751692 MOID= .32451001 TP= 2022-Feb-01.7631662302 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 9.8 M2= 13.2 k1= 14.5 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 3.128955364227E-9 A2= -5.707781016827E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K222/15, data arc: 2014-07-29 to 2024-04-18 2: k1=14.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Mon May 6 21:30:24 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 19P/Borrelly {source: JPL#K222/15} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Dec-08 00:00:00.0000 UT Stop time : A.D. 2028-Dec-15 00:00:00.0000 UT Step-size : 120 minutes ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 4.22, 4.22, 4.22 km {Equator_a, b, pole_c} 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.240506.p240730 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-06. PREDICTS-> 2024-JUL-29 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= 2459277.5 ! 2021-Mar-04.0000000 (TDB) RMSW= n.a. EC= .6379169523065308 QR= 1.30602082303394 TP= 2459612.2631662302 OM= 74.30163917249709 W= 351.8611443404037 IN= 29.31902980947663 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.434501508756176E+00 Y=-2.111364234946459E+00 Z=-2.228368145546027E+00 VX= 3.152401528420522E-03 VY= 8.466180933168799E-03 VZ= 3.317945119886062E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 9.8 M2= 13.2 k1= 14.5 k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 3.128955364227E-9 A2= -5.707781016827E-10 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 2028-Dec-08 00:00 1.310772469388 -0.7352680 2028-Dec-08 02:00 1.310737462197 -0.7194601 2028-Dec-08 04:00 1.310703215873 -0.7036503 2028-Dec-08 06:00 1.310669730505 -0.6878387 2028-Dec-08 08:00 1.310637006181 -0.6720252 2028-Dec-08 10:00 1.310605042989 -0.6562100 2028-Dec-08 12:00 1.310573841013 -0.6403930 2028-Dec-08 14:00 1.310543400335 -0.6245743 2028-Dec-08 16:00 1.310513721037 -0.6087540 2028-Dec-08 18:00 1.310484803195 -0.5929320 2028-Dec-08 20:00 1.310456646887 -0.5771085 2028-Dec-08 22:00 1.310429252188 -0.5612834 2028-Dec-09 00:00 1.310402619169 -0.5454569 2028-Dec-09 02:00 1.310376747900 -0.5296289 2028-Dec-09 04:00 1.310351638452 -0.5137995 2028-Dec-09 06:00 1.310327290888 -0.4979687 2028-Dec-09 08:00 1.310303705275 -0.4821366 2028-Dec-09 10:00 1.310280881674 -0.4663033 2028-Dec-09 12:00 1.310258820146 -0.4504687 2028-Dec-09 14:00 1.310237520749 -0.4346329 2028-Dec-09 16:00 1.310216983539 -0.4187959 2028-Dec-09 18:00 1.310197208570 -0.4029579 2028-Dec-09 20:00 1.310178195895 -0.3871187 2028-Dec-09 22:00 1.310159945563 -0.3712786 2028-Dec-10 00:00 1.310142457624 -0.3554375 2028-Dec-10 02:00 1.310125732122 -0.3395954 2028-Dec-10 04:00 1.310109769103 -0.3237524 2028-Dec-10 06:00 1.310094568608 -0.3079086 2028-Dec-10 08:00 1.310080130677 -0.2920639 2028-Dec-10 10:00 1.310066455349 -0.2762185 2028-Dec-10 12:00 1.310053542659 -0.2603723 2028-Dec-10 14:00 1.310041392641 -0.2445255 2028-Dec-10 16:00 1.310030005327 -0.2286780 2028-Dec-10 18:00 1.310019380748 -0.2128299 2028-Dec-10 20:00 1.310009518931 -0.1969812 2028-Dec-10 22:00 1.310000419902 -0.1811320 2028-Dec-11 00:00 1.309992083685 -0.1652824 2028-Dec-11 02:00 1.309984510301 -0.1494323 2028-Dec-11 04:00 1.309977699771 -0.1335818 2028-Dec-11 06:00 1.309971652112 -0.1177309 2028-Dec-11 08:00 1.309966367340 -0.1018798 2028-Dec-11 10:00 1.309961845468 -0.0860283 2028-Dec-11 12:00 1.309958086509 -0.0701767 2028-Dec-11 14:00 1.309955090471 -0.0543248 2028-Dec-11 16:00 1.309952857363 -0.0384729 2028-Dec-11 18:00 1.309951387190 -0.0226208 2028-Dec-11 20:00 1.309950679956 -0.0067686 2028-Dec-11 22:00 1.309950735662 0.0090835 2028-Dec-12 00:00 1.309951554307 0.0249356 2028-Dec-12 02:00 1.309953135890 0.0407877 2028-Dec-12 04:00 1.309955480405 0.0566396 2028-Dec-12 06:00 1.309958587846 0.0724914 2028-Dec-12 08:00 1.309962458204 0.0883430 2028-Dec-12 10:00 1.309967091469 0.1041944 2028-Dec-12 12:00 1.309972487627 0.1200455 2028-Dec-12 14:00 1.309978646665 0.1358962 2028-Dec-12 16:00 1.309985568565 0.1517466 2028-Dec-12 18:00 1.309993253309 0.1675966 2028-Dec-12 20:00 1.310001700876 0.1834461 2028-Dec-12 22:00 1.310010911242 0.1992952 2028-Dec-13 00:00 1.310020884384 0.2151437 2028-Dec-13 02:00 1.310031620274 0.2309916 2028-Dec-13 04:00 1.310043118883 0.2468390 2028-Dec-13 06:00 1.310055380181 0.2626856 2028-Dec-13 08:00 1.310068404134 0.2785316 2028-Dec-13 10:00 1.310082190707 0.2943768 2028-Dec-13 12:00 1.310096739864 0.3102212 2028-Dec-13 14:00 1.310112051565 0.3260648 2028-Dec-13 16:00 1.310128125769 0.3419076 2028-Dec-13 18:00 1.310144962433 0.3577494 2028-Dec-13 20:00 1.310162561512 0.3735902 2028-Dec-13 22:00 1.310180922959 0.3894301 2028-Dec-14 00:00 1.310200046724 0.4052689 2028-Dec-14 02:00 1.310219932757 0.4211067 2028-Dec-14 04:00 1.310240581004 0.4369433 2028-Dec-14 06:00 1.310261991410 0.4527788 2028-Dec-14 08:00 1.310284163917 0.4686130 2028-Dec-14 10:00 1.310307098467 0.4844461 2028-Dec-14 12:00 1.310330794998 0.5002778 2028-Dec-14 14:00 1.310355253446 0.5161082 2028-Dec-14 16:00 1.310380473747 0.5319372 2028-Dec-14 18:00 1.310406455833 0.5477648 2028-Dec-14 20:00 1.310433199634 0.5635909 2028-Dec-14 22:00 1.310460705080 0.5794156 2028-Dec-15 00:00 1.310488972096 0.5952386 $$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 = '90000304' START_TIME = '2028-Dec-08' STOP_TIME = '2028-Dec-15' STEP_SIZE = '2 hours' QUANTITIES = '19'