******************************************************************************* JPL/HORIZONS 322P/SOHO 2024-May-05 19:11:26 Rec #:90001282 (+COV) Soln.date: 2016-Oct-27_11:29:40 # obs: 318 (1999-2015) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457179.5 ! 2015-Jun-06.0000000 (TDB) RMSW= n.a. EC= .9786764762641812 QR= .0536555610873724 TP= 2457269.564054383 OM= 359.5244877541514 W= 49.04947677107452 IN= 12.58923564712983 A= 2.516261465605842 MA= 337.7606588347672 ADIST= 4.978867370124313 PER= 3.9915525611654 N= .246928048 ANGMOM= .005605008 DAN= .06468 DDN= .29609 L= 47.8826253 B= 9.475150599999999 MOID= .0921698 TP= 2015-Sep-04.0640543830 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 19. M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#10, data arc: 1999-09-04 to 2015-08-08 2: k1=10.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun May 5 19:11:26 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 322P/SOHO {source: JPL#10} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Aug-20 00:00:00.0000 UT Stop time : A.D. 2023-Aug-22 00:00:00.0000 UT Step-size : 60 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.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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= 2457179.5 ! 2015-Jun-06.0000000 (TDB) RMSW= n.a. EC= .9786764762641812 QR= .0536555610873724 TP= 2457269.564054383 OM= 359.5244877541514 W= 49.04947677107452 IN= 12.58923564712983 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-8.726486151347854E-01 Y=-1.414462651402457E+00 Z=-1.030679658249554E+00 VX= 8.498325497919700E-03 VY= 8.580362819416017E-03 VZ= 6.259440089832738E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 19. M2= n.a. k1= 10. k2= n.a. PHCOF= n.a. ********************************************************************************************************* Date__(UT)__HR:MN T-mag N-mag r rdot VmagSn VmagOb S-O-T /r ********************************************************************************************************* $$SOE 2023-Aug-20 00:00 8. n.a. 0.092003268408 -92.2459707 137.5895892 116.4866639 0.6092 /T 2023-Aug-20 01:00 8. n.a. 0.089786811010 -92.0026987 139.3088384 118.4668703 0.5160 /L 2023-Aug-20 02:00 8. n.a. 0.087577243297 -91.6729988 141.0869042 120.5237751 0.4601 /L 2023-Aug-20 03:00 8. n.a. 0.085376789549 -91.2446184 142.9253878 122.6605931 0.4548 /L 2023-Aug-20 04:00 8. n.a. 0.083187988709 -90.7036141 144.8256112 124.8804236 0.5013 /L 2023-Aug-20 05:00 8. n.a. 0.081013737533 -90.0341422 146.7885085 127.1861550 0.5868 /L 2023-Aug-20 06:00 8. n.a. 0.078857338913 -89.2182380 148.8144883 129.5803406 0.6964 /L 2023-Aug-20 07:00 8. n.a. 0.076722555558 -88.2355925 150.9032641 132.0650404 0.8196 /L 2023-Aug-20 08:00 8. n.a. 0.074613668953 -87.0633390 153.0536450 134.6416201 0.9504 /L 2023-Aug-20 09:00 7. n.a. 0.072535543131 -85.6758686 155.2632815 137.3105001 1.0852 /L 2023-Aug-20 10:00 7. n.a. 0.070493692251 -84.0447038 157.5283606 140.0708464 1.2216 /L 2023-Aug-20 11:00 7. n.a. 0.068494350118 -82.1384699 159.8432467 142.9201953 1.3582 /L 2023-Aug-20 12:00 7. n.a. 0.066544538686 -79.9230178 162.2000684 145.8540087 1.4937 /L 2023-Aug-20 13:00 7. n.a. 0.064652131050 -77.3617707 164.5882560 148.8651591 1.6272 /L 2023-Aug-20 14:00 7. n.a. 0.062825902562 -74.4163809 166.9940460 151.9433521 1.7579 /L 2023-Aug-20 15:00 7. n.a. 0.061075561403 -71.0477981 169.3999801 155.0745107 1.8850 /L 2023-Aug-20 16:00 7. n.a. 0.059411747428 -67.2178561 171.7844467 158.2401589 2.0076 /L 2023-Aug-20 17:00 7. n.a. 0.057845985696 -62.8914686 174.1213339 161.4168703 2.1251 /L 2023-Aug-20 18:00 6. n.a. 0.056390579291 -58.0394856 176.3798874 164.5758751 2.2365 /L 2023-Aug-20 19:00 6. n.a. 0.055058425818 -52.6421724 178.5248882 167.6829436 2.3412 /L 2023-Aug-20 20:00 6. n.a. 0.053862744329 -46.6931418 180.5172727 170.6986877 2.4382 /L 2023-Aug-20 21:00 6. n.a. 0.052816705623 -40.2033893 182.3153030 173.5794149 2.5267 /L 2023-Aug-20 22:00 6.125 n.a. 0.051932969661 -33.2048835 183.8763462 176.2786357 2.6061 /L 2023-Aug-20 23:00 6.075 n.a. 0.051223149028 -25.7530077 185.1592267 178.7492422 2.6757 /L 2023-Aug-21 00:00 6.039 n.a. 0.050697235126 -17.9271057 186.1269930 180.9462504 2.7348 /L 2023-Aug-21 01:00 6.020 n.a. 0.050363040368 -9.8285344 186.7497995 182.8298505 2.7831 /L 2023-Aug-21 02:00 6.018 n.a. 0.050225719888 -1.5760006 187.0075041 184.3683813 2.8202 /L 2023-Aug-21 03:00 6.033 n.a. 0.050287435403 6.7015012 186.8915540 185.5407781 2.8460 /L 2023-Aug-21 04:00 6.065 n.a. 0.050547209355 14.8732757 186.4058187 186.3380938 2.8607 /L 2023-Aug-21 05:00 6.113 n.a. 0.051000991237 22.8157714 185.5662106 186.7638415 2.8644 /L 2023-Aug-21 06:00 6.176 n.a. 0.051641926062 30.4203519 184.3991666 186.8331357 2.8577 /L 2023-Aug-21 07:00 6.254 n.a. 0.052460785659 37.5989384 182.9392726 186.5708331 2.8409 /L 2023-Aug-21 08:00 6.344 n.a. 0.053446504055 44.2869886 181.2264390 186.0090312 2.8149 /L 2023-Aug-21 09:00 6.444 n.a. 0.054586752226 50.4438427 179.3030484 185.1843375 2.7804 /L 2023-Aug-21 10:00 6.554 n.a. 0.055868494055 56.0509169 177.2114195 184.1352789 2.7380 /L 2023-Aug-21 11:00 6.671 n.a. 0.057278480109 61.1084606 174.9918001 182.9001074 2.6886 /L 2023-Aug-21 12:00 6.793 n.a. 0.058803653717 65.6316156 172.6809685 181.5151342 2.6329 /L 2023-Aug-21 13:00 6.920 n.a. 0.060431460315 69.6463932 170.3114155 180.0136122 2.5717 /L 2023-Aug-21 14:00 7.049 n.a. 0.062150063590 73.1859943 167.9110130 178.4251077 2.5057 /L 2023-Aug-21 15:00 7.181 n.a. 0.063948479799 76.2877064 165.5030488 176.7752662 2.4354 /L 2023-Aug-21 16:00 7.314 n.a. 0.065816645389 78.9904592 163.1065084 175.0858639 2.3615 /L 2023-Aug-21 17:00 7.446 n.a. 0.067745433608 81.3330164 160.7365004 173.3750477 2.2846 /L 2023-Aug-21 18:00 7.578 n.a. 0.069726634508 83.3527224 158.4047480 171.6576822 2.2050 /L 2023-Aug-21 19:00 7.710 n.a. 0.071752910461 85.0847018 156.1200910 169.9457452 2.1233 /L 2023-Aug-21 20:00 7.840 n.a. 0.073817736808 86.5614064 153.8889629 168.2487293 2.0398 /L 2023-Aug-21 21:00 7.968 n.a. 0.075915334819 87.8124163 151.7158239 166.5740243 1.9549 /L 2023-Aug-21 22:00 8.094 n.a. 0.078040602141 88.8644182 149.6035413 164.9272654 1.8689 /L 2023-Aug-21 23:00 8.218 n.a. 0.080189044214 89.7413004 147.5537138 163.3126419 1.7820 /L 2023-Aug-22 00:00 8.340 n.a. 0.082356708893 90.4643187 145.5669451 161.7331625 1.6946 /L $$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. 'T-mag N-mag' = Comets' apparent visual total magnitude ("T-mag") and nuclear magnitude ("N-mag") using the standard IAU model: T-mag= M1 + 5*log10(delta) + k1*log10(r) N-mag= M2 + 5*log10(delta) + k2*log10(r) + phcof*beta Units: MAGNITUDES '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 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 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 = '322P' START_TIME = '2023-Aug-20' STOP_TIME = '2023-Aug-22' STEP_SIZE = '1 hours' QUANTITIES = '9,19,22,23'