******************************************************************************* JPL/HORIZONS 58P/Jackson-Neujmin 2024-May-04 19:07:05 Rec #:90000641 (+COV) Soln.date: 2020-Aug-27_10:15:32 # obs: 326 (1987-1996) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2449955.5 ! 1995-Aug-26.0000000 (TDB) RMSW= n.a. EC= .6613876106907082 QR= 1.38116144972358 TP= 2449997.1067696768 OM= 160.7179427326805 W= 200.3513372099454 IN= 13.47845462085141 A= 4.078886341226026 MA= 355.021991120513 ADIST= 6.776611232728472 PER= 8.237977623653499 N= .119644205 ANGMOM= .026057884 DAN= 6.04016 DDN= 1.41636 L= .5530206 B= -4.6494681 MOID= .38511699 TP= 1995-Oct-06.6067696768 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 9.1 M2= 16.3 k1= 26.75 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= 4.108425676823E-9 A2= -4.523602128029E-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#J952/1, data arc: 1987-07-25 to 1996-02-18 2: k1=26.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat May 4 19:07:05 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 58P/Jackson-Neujmin {source: JPL#J952/1} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Sep-04 00:00:00.0000 UT Stop time : A.D. 2028-Sep-06 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= 2449955.5 ! 1995-Aug-26.0000000 (TDB) RMSW= n.a. EC= .6613876106907082 QR= 1.38116144972358 TP= 2449997.1067696768 OM= 160.7179427326805 W= 200.3513372099454 IN= 13.47845462085141 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.269427815668759E+00 Y=-6.958776534369284E-01 Z=-2.311071112865984E-01 VX= 5.408131310601856E-03 VY= 1.714644389277794E-02 VZ= 2.812362282491691E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 9.1 M2= 16.3 k1= 26.75 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= 4.108425676823E-9 A2= -4.523602128029E-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 2028-Sep-04 00:00 1.391891660068 1.6156865 2028-Sep-04 01:00 1.391930628171 1.6229140 2028-Sep-04 02:00 1.391969770189 1.6301405 2028-Sep-04 03:00 1.392009086101 1.6373661 2028-Sep-04 04:00 1.392048575883 1.6445908 2028-Sep-04 05:00 1.392088239515 1.6518146 2028-Sep-04 06:00 1.392128076972 1.6590374 2028-Sep-04 07:00 1.392168088234 1.6662593 2028-Sep-04 08:00 1.392208273276 1.6734803 2028-Sep-04 09:00 1.392248632077 1.6807003 2028-Sep-04 10:00 1.392289164614 1.6879193 2028-Sep-04 11:00 1.392329870863 1.6951375 2028-Sep-04 12:00 1.392370750802 1.7023546 2028-Sep-04 13:00 1.392411804407 1.7095708 2028-Sep-04 14:00 1.392453031656 1.7167860 2028-Sep-04 15:00 1.392494432526 1.7240003 2028-Sep-04 16:00 1.392536006992 1.7312136 2028-Sep-04 17:00 1.392577755031 1.7384259 2028-Sep-04 18:00 1.392619676620 1.7456372 2028-Sep-04 19:00 1.392661771735 1.7528475 2028-Sep-04 20:00 1.392704040352 1.7600569 2028-Sep-04 21:00 1.392746482448 1.7672652 2028-Sep-04 22:00 1.392789097998 1.7744726 2028-Sep-04 23:00 1.392831886979 1.7816789 2028-Sep-05 00:00 1.392874849366 1.7888843 2028-Sep-05 01:00 1.392917985135 1.7960886 2028-Sep-05 02:00 1.392961294262 1.8032920 2028-Sep-05 03:00 1.393004776723 1.8104943 2028-Sep-05 04:00 1.393048432492 1.8176956 2028-Sep-05 05:00 1.393092261545 1.8248959 2028-Sep-05 06:00 1.393136263858 1.8320951 2028-Sep-05 07:00 1.393180439406 1.8392933 2028-Sep-05 08:00 1.393224788164 1.8464905 2028-Sep-05 09:00 1.393269310106 1.8536866 2028-Sep-05 10:00 1.393314005209 1.8608817 2028-Sep-05 11:00 1.393358873446 1.8680758 2028-Sep-05 12:00 1.393403914792 1.8752688 2028-Sep-05 13:00 1.393449129222 1.8824607 2028-Sep-05 14:00 1.393494516711 1.8896516 2028-Sep-05 15:00 1.393540077233 1.8968414 2028-Sep-05 16:00 1.393585810763 1.9040301 2028-Sep-05 17:00 1.393631717274 1.9112178 2028-Sep-05 18:00 1.393677796740 1.9184044 2028-Sep-05 19:00 1.393724049137 1.9255899 2028-Sep-05 20:00 1.393770474438 1.9327744 2028-Sep-05 21:00 1.393817072616 1.9399577 2028-Sep-05 22:00 1.393863843646 1.9471400 2028-Sep-05 23:00 1.393910787502 1.9543212 2028-Sep-06 00:00 1.393957904156 1.9615013 $$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 = '90000641' START_TIME = '2028-Sep-04 STOP_TIME = '2028-Sep-06' STEP_SIZE = '1 hours' QUANTITIES = '19'