******************************************************************************* JPL/HORIZONS 58P/Jackson-Neujmin 2025-Dec-12 17:57:16 Rec #:90000641 Soln.date: - # obs: 321 (1970-1996) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2443880.5 ! 1979-Jan-07.0000000 (TDB) RMSW= n.a. EC= .654451 QR= 1.425267 TP= 2443868.7196999998 OM= 163.8217 W= 196.2876 IN= 14.0663 A= 4.124645129923687 MA= 1.386055244271833 ADIST= 6.824023259847374 PER= 8.3769917210603 N= .117658739 ANGMOM= .026415359 DAN= 6.34196 DDN= 1.44826 L= 359.6457243 B= -3.9085412 TP= 1978-Dec-26.2196999998 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 14.3 M2= 17.8 k1= 12.75 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= SAO/1978 2: k1=12.75, k2=5., phase coef.=0.03;non-gravs. considered; 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:57:16 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 58P/Jackson-Neujmin {source: SAO/197820} 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.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 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= 2443880.5 ! 1979-Jan-07.0000000 (TDB) RMSW= n.a. EC= .654451 QR= 1.425267 TP= 2443868.7196999998 OM= 163.8217 W= 196.2876 IN= 14.0663 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.409713664963577E+00 Y= 2.448946511675921E-01 Z=-5.435162466496225E-02 VX=-1.882810839132689E-03 VY= 1.808911085994786E-02 VZ= 3.289762983845709E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 14.3 M2= 17.8 k1= 12.75 k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Sep-04 00:00 1.387710401068 0.3512884 2028-Sep-04 01:00 1.387718942936 0.3586170 2028-Sep-04 02:00 1.387727661162 0.3659454 2028-Sep-04 03:00 1.387736555742 0.3732736 2028-Sep-04 04:00 1.387745626671 0.3806016 2028-Sep-04 05:00 1.387754873944 0.3879294 2028-Sep-04 06:00 1.387764297554 0.3952569 2028-Sep-04 07:00 1.387773897497 0.4025842 2028-Sep-04 08:00 1.387783673768 0.4099113 2028-Sep-04 09:00 1.387793626359 0.4172381 2028-Sep-04 10:00 1.387803755267 0.4245647 2028-Sep-04 11:00 1.387814060485 0.4318911 2028-Sep-04 12:00 1.387824542006 0.4392172 2028-Sep-04 13:00 1.387835199826 0.4465431 2028-Sep-04 14:00 1.387846033937 0.4538687 2028-Sep-04 15:00 1.387857044335 0.4611940 2028-Sep-04 16:00 1.387868231011 0.4685191 2028-Sep-04 17:00 1.387879593961 0.4758439 2028-Sep-04 18:00 1.387891133177 0.4831684 2028-Sep-04 19:00 1.387902848652 0.4904927 2028-Sep-04 20:00 1.387914740381 0.4978167 2028-Sep-04 21:00 1.387926808356 0.5051403 2028-Sep-04 22:00 1.387939052570 0.5124638 2028-Sep-04 23:00 1.387951473016 0.5197869 2028-Sep-05 00:00 1.387964069688 0.5271097 2028-Sep-05 01:00 1.387976842577 0.5344322 2028-Sep-05 02:00 1.387989791677 0.5417544 2028-Sep-05 03:00 1.388002916980 0.5490763 2028-Sep-05 04:00 1.388016218478 0.5563978 2028-Sep-05 05:00 1.388029696164 0.5637191 2028-Sep-05 06:00 1.388043350031 0.5710400 2028-Sep-05 07:00 1.388057180070 0.5783606 2028-Sep-05 08:00 1.388071186273 0.5856809 2028-Sep-05 09:00 1.388085368633 0.5930008 2028-Sep-05 10:00 1.388099727140 0.6003204 2028-Sep-05 11:00 1.388114261788 0.6076397 2028-Sep-05 12:00 1.388128972568 0.6149586 2028-Sep-05 13:00 1.388143859470 0.6222772 2028-Sep-05 14:00 1.388158922487 0.6295954 2028-Sep-05 15:00 1.388174161611 0.6369132 2028-Sep-05 16:00 1.388189576831 0.6442307 2028-Sep-05 17:00 1.388205168140 0.6515478 2028-Sep-05 18:00 1.388220935528 0.6588645 2028-Sep-05 19:00 1.388236878987 0.6661808 2028-Sep-05 20:00 1.388252998507 0.6734968 2028-Sep-05 21:00 1.388269294079 0.6808124 2028-Sep-05 22:00 1.388285765694 0.6881276 2028-Sep-05 23:00 1.388302413342 0.6954424 2028-Sep-06 00:00 1.388319237014 0.7027568 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90000641' QUANTITIES = '19' START_TIME = '2028-Sep-04 STEP_SIZE = '1 hours' STOP_TIME = '2028-Sep-06'