******************************************************************************* JPL/HORIZONS 12P/Pons-Brooks 2024-May-10 18:46:43 Rec #:90000223 (+COV) Soln.date: 2024-May-07_15:44:44 # obs: 7806 (1953-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .954560231261639 QR= .7808647223630955 TP= 2460421.6315887137 OM= 255.8550527281396 W= 198.9880068009385 IN= 74.19083896864018 A= 17.18461039842126 MA= 356.9543716518635 ADIST= 33.58835607447943 PER= 71.238987438832 N= .01383549 ANGMOM= .02125171 DAN= 15.67302 DDN= .80218 L= 81.21046870000001 B= -18.2439137 MOID= .181446 TP= 2024-Apr-21.1315887137 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K242/62, data arc: 1953-06-20 to 2024-05-01 2: k1=15.0, k2=10.0; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri May 10 18:46:43 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 12P/Pons-Brooks {source: JPL#K242/62} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Apr-21 03:00:00.0000 UT Stop time : A.D. 2024-Apr-21 03:40:00.0000 UT Step-size : 120 steps ******************************************************************************* 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= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .954560231261639 QR= .7808647223630955 TP= 2460421.6315887137 OM= 255.8550527281396 W= 198.9880068009385 IN= 74.19083896864018 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 6.283545798880217E-01 Y=-2.181994315750504E+00 Z= 2.388813143264948E+00 VX=-1.271075406639088E-04 VY= 1.205841658167576E-02 VZ=-4.114318054574097E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN:SC.fff r rdot ********************************************************* $$SOE 2024-Apr-21 03:00:00.000 0.780778275751 -0.0059754 2024-Apr-21 03:00:20.000 0.780778274965 -0.0057897 2024-Apr-21 03:00:40.000 0.780778274203 -0.0056040 2024-Apr-21 03:01:00.000 0.780778273466 -0.0054183 2024-Apr-21 03:01:20.000 0.780778272754 -0.0052325 2024-Apr-21 03:01:40.000 0.780778272067 -0.0050468 2024-Apr-21 03:02:00.000 0.780778271405 -0.0048611 2024-Apr-21 03:02:20.000 0.780778270767 -0.0046754 2024-Apr-21 03:02:40.000 0.780778270155 -0.0044897 2024-Apr-21 03:03:00.000 0.780778269567 -0.0043039 2024-Apr-21 03:03:20.000 0.780778269004 -0.0041182 2024-Apr-21 03:03:40.000 0.780778268466 -0.0039325 2024-Apr-21 03:04:00.000 0.780778267953 -0.0037468 2024-Apr-21 03:04:20.000 0.780778267464 -0.0035610 2024-Apr-21 03:04:40.000 0.780778267000 -0.0033753 2024-Apr-21 03:05:00.000 0.780778266562 -0.0031896 2024-Apr-21 03:05:20.000 0.780778266147 -0.0030039 2024-Apr-21 03:05:40.000 0.780778265758 -0.0028181 2024-Apr-21 03:06:00.000 0.780778265394 -0.0026324 2024-Apr-21 03:06:20.000 0.780778265054 -0.0024467 2024-Apr-21 03:06:40.000 0.780778264740 -0.0022610 2024-Apr-21 03:07:00.000 0.780778264450 -0.0020753 2024-Apr-21 03:07:20.000 0.780778264185 -0.0018895 2024-Apr-21 03:07:40.000 0.780778263945 -0.0017038 2024-Apr-21 03:08:00.000 0.780778263729 -0.0015181 2024-Apr-21 03:08:20.000 0.780778263539 -0.0013324 2024-Apr-21 03:08:40.000 0.780778263373 -0.0011466 2024-Apr-21 03:09:00.000 0.780778263232 -0.0009609 2024-Apr-21 03:09:20.000 0.780778263116 -0.0007752 2024-Apr-21 03:09:40.000 0.780778263025 -0.0005895 2024-Apr-21 03:10:00.000 0.780778262958 -0.0004037 2024-Apr-21 03:10:20.000 0.780778262917 -0.0002180 2024-Apr-21 03:10:40.000 0.780778262900 -0.0000323 2024-Apr-21 03:11:00.000 0.780778262908 0.0001534 2024-Apr-21 03:11:20.000 0.780778262941 0.0003391 2024-Apr-21 03:11:40.000 0.780778262999 0.0005249 2024-Apr-21 03:12:00.000 0.780778263082 0.0007106 2024-Apr-21 03:12:20.000 0.780778263189 0.0008963 2024-Apr-21 03:12:40.000 0.780778263321 0.0010820 2024-Apr-21 03:13:00.000 0.780778263478 0.0012678 2024-Apr-21 03:13:20.000 0.780778263660 0.0014535 2024-Apr-21 03:13:40.000 0.780778263867 0.0016392 2024-Apr-21 03:14:00.000 0.780778264098 0.0018249 2024-Apr-21 03:14:20.000 0.780778264355 0.0020107 2024-Apr-21 03:14:40.000 0.780778264636 0.0021964 2024-Apr-21 03:15:00.000 0.780778264942 0.0023821 2024-Apr-21 03:15:20.000 0.780778265273 0.0025678 2024-Apr-21 03:15:40.000 0.780778265629 0.0027535 2024-Apr-21 03:16:00.000 0.780778266009 0.0029393 2024-Apr-21 03:16:20.000 0.780778266415 0.0031250 2024-Apr-21 03:16:40.000 0.780778266845 0.0033107 2024-Apr-21 03:17:00.000 0.780778267300 0.0034964 2024-Apr-21 03:17:20.000 0.780778267780 0.0036822 2024-Apr-21 03:17:40.000 0.780778268284 0.0038679 2024-Apr-21 03:18:00.000 0.780778268814 0.0040536 2024-Apr-21 03:18:20.000 0.780778269368 0.0042393 2024-Apr-21 03:18:40.000 0.780778269948 0.0044251 2024-Apr-21 03:19:00.000 0.780778270552 0.0046108 2024-Apr-21 03:19:20.000 0.780778271180 0.0047965 2024-Apr-21 03:19:40.000 0.780778271834 0.0049822 2024-Apr-21 03:20:00.000 0.780778272513 0.0051679 2024-Apr-21 03:20:20.000 0.780778273216 0.0053537 2024-Apr-21 03:20:40.000 0.780778273944 0.0055394 2024-Apr-21 03:21:00.000 0.780778274697 0.0057251 2024-Apr-21 03:21:20.000 0.780778275475 0.0059108 2024-Apr-21 03:21:40.000 0.780778276277 0.0060966 2024-Apr-21 03:22:00.000 0.780778277105 0.0062823 2024-Apr-21 03:22:20.000 0.780778277957 0.0064680 2024-Apr-21 03:22:40.000 0.780778278834 0.0066537 2024-Apr-21 03:23:00.000 0.780778279736 0.0068394 2024-Apr-21 03:23:20.000 0.780778280663 0.0070252 2024-Apr-21 03:23:40.000 0.780778281615 0.0072109 2024-Apr-21 03:24:00.000 0.780778282591 0.0073966 2024-Apr-21 03:24:20.000 0.780778283593 0.0075823 2024-Apr-21 03:24:40.000 0.780778284619 0.0077681 2024-Apr-21 03:25:00.000 0.780778285670 0.0079538 2024-Apr-21 03:25:20.000 0.780778286745 0.0081395 2024-Apr-21 03:25:40.000 0.780778287846 0.0083252 2024-Apr-21 03:26:00.000 0.780778288971 0.0085110 2024-Apr-21 03:26:20.000 0.780778290122 0.0086967 2024-Apr-21 03:26:40.000 0.780778291297 0.0088824 2024-Apr-21 03:27:00.000 0.780778292497 0.0090681 2024-Apr-21 03:27:20.000 0.780778293721 0.0092538 2024-Apr-21 03:27:40.000 0.780778294971 0.0094396 2024-Apr-21 03:28:00.000 0.780778296245 0.0096253 2024-Apr-21 03:28:20.000 0.780778297545 0.0098110 2024-Apr-21 03:28:40.000 0.780778298869 0.0099967 2024-Apr-21 03:29:00.000 0.780778300218 0.0101825 2024-Apr-21 03:29:20.000 0.780778301591 0.0103682 2024-Apr-21 03:29:40.000 0.780778302990 0.0105539 2024-Apr-21 03:30:00.000 0.780778304413 0.0107396 2024-Apr-21 03:30:20.000 0.780778305862 0.0109254 2024-Apr-21 03:30:40.000 0.780778307335 0.0111111 2024-Apr-21 03:31:00.000 0.780778308832 0.0112968 2024-Apr-21 03:31:20.000 0.780778310355 0.0114825 2024-Apr-21 03:31:40.000 0.780778311903 0.0116682 2024-Apr-21 03:32:00.000 0.780778313475 0.0118540 2024-Apr-21 03:32:20.000 0.780778315072 0.0120397 2024-Apr-21 03:32:40.000 0.780778316694 0.0122254 2024-Apr-21 03:33:00.000 0.780778318341 0.0124111 2024-Apr-21 03:33:20.000 0.780778320013 0.0125969 2024-Apr-21 03:33:40.000 0.780778321709 0.0127826 2024-Apr-21 03:34:00.000 0.780778323431 0.0129683 2024-Apr-21 03:34:20.000 0.780778325177 0.0131540 2024-Apr-21 03:34:40.000 0.780778326948 0.0133398 2024-Apr-21 03:35:00.000 0.780778328744 0.0135255 2024-Apr-21 03:35:20.000 0.780778330564 0.0137112 2024-Apr-21 03:35:40.000 0.780778332410 0.0138969 2024-Apr-21 03:36:00.000 0.780778334280 0.0140826 2024-Apr-21 03:36:20.000 0.780778336175 0.0142684 2024-Apr-21 03:36:40.000 0.780778338095 0.0144541 2024-Apr-21 03:37:00.000 0.780778340040 0.0146398 2024-Apr-21 03:37:20.000 0.780778342010 0.0148255 2024-Apr-21 03:37:40.000 0.780778344004 0.0150113 2024-Apr-21 03:38:00.000 0.780778346024 0.0151970 2024-Apr-21 03:38:20.000 0.780778348068 0.0153827 2024-Apr-21 03:38:40.000 0.780778350137 0.0155684 2024-Apr-21 03:39:00.000 0.780778352231 0.0157542 2024-Apr-21 03:39:20.000 0.780778354349 0.0159399 2024-Apr-21 03:39:40.000 0.780778356493 0.0161256 2024-Apr-21 03:40:00.000 0.780778358661 0.0163113 $$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 = '90000223' START_TIME = '2024-Apr-21 03:00' STOP_TIME = '2024-Apr-21 03:40' STEP_SIZE = '120' QUANTITIES = '19'