******************************************************************************* JPL/HORIZONS 28P/Neujmin 1 2024-May-08 02:04:43 Rec #:90000381 Soln.date: - # obs: 90 (1913-1989) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2420000.5 ! 1913-Aug-21.0000000 (TDB) RMSW= n.a. EC= .775463 QR= 1.528689 TP= 2419996.4268999998 OM= 349.1165 W= 346.2305 IN= 14.8498 A= 6.808183061143598 MA= .2259864029838645 ADIST= 12.0876771222872 PER= 17.764583895045 N= .055482655 ANGMOM= .028339803 DAN= 1.54812 DDN= 10.99627 L= 335.7902135 B= -3.4972302 TP= 1913-Aug-16.9268999998 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 10.7 M1= 13.2 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO/1913 2: k1=4.5;epoch may be 2420001.0 (hour ambiguous: 12h/0h); time units are UT, but s ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 8 02:04:43 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 28P/Neujmin 1 {source: SAO/191320} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2039-Jun-02 00:00:00.0000 UT Stop time : A.D. 2039-Jun-08 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 10.7 km 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.240507.p240731 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-07. PREDICTS-> 2024-JUL-30 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= 2420000.5 ! 1913-Aug-21.0000000 (TDB) RMSW= n.a. EC= .775463 QR= 1.528689 TP= 2419996.4268999998 OM= 349.1165 W= 346.2305 IN= 14.8498 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.421715796934174E+00 Y=-4.833527062426932E-01 Z=-2.906448807021507E-01 VX= 7.144919362100655E-03 VY= 1.325314180469138E-02 VZ= 1.080643992790155E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 10.7 M1= 13.2 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2039-Jun-02 00:00 1.693257701252 -7.3724094 2039-Jun-02 03:00 1.692725956513 -7.3578028 2039-Jun-02 06:00 1.692195267127 -7.3431755 2039-Jun-02 09:00 1.691665634594 -7.3285273 2039-Jun-02 12:00 1.691137060411 -7.3138585 2039-Jun-02 15:00 1.690609546077 -7.2991688 2039-Jun-02 18:00 1.690083093089 -7.2844585 2039-Jun-02 21:00 1.689557702944 -7.2697274 2039-Jun-03 00:00 1.689033377136 -7.2549756 2039-Jun-03 03:00 1.688510117160 -7.2402031 2039-Jun-03 06:00 1.687987924511 -7.2254099 2039-Jun-03 09:00 1.687466800679 -7.2105961 2039-Jun-03 12:00 1.686946747158 -7.1957616 2039-Jun-03 15:00 1.686427765439 -7.1809064 2039-Jun-03 18:00 1.685909857010 -7.1660307 2039-Jun-03 21:00 1.685393023362 -7.1511342 2039-Jun-04 00:00 1.684877265982 -7.1362172 2039-Jun-04 03:00 1.684362586358 -7.1212796 2039-Jun-04 06:00 1.683848985976 -7.1063215 2039-Jun-04 09:00 1.683336466321 -7.0913427 2039-Jun-04 12:00 1.682825028876 -7.0763434 2039-Jun-04 15:00 1.682314675125 -7.0613236 2039-Jun-04 18:00 1.681805406551 -7.0462832 2039-Jun-04 21:00 1.681297224633 -7.0312223 2039-Jun-05 00:00 1.680790130853 -7.0161410 2039-Jun-05 03:00 1.680284126688 -7.0010391 2039-Jun-05 06:00 1.679779213617 -6.9859168 2039-Jun-05 09:00 1.679275393115 -6.9707741 2039-Jun-05 12:00 1.678772666660 -6.9556109 2039-Jun-05 15:00 1.678271035724 -6.9404273 2039-Jun-05 18:00 1.677770501781 -6.9252233 2039-Jun-05 21:00 1.677271066303 -6.9099989 2039-Jun-06 00:00 1.676772730761 -6.8947542 2039-Jun-06 03:00 1.676275496624 -6.8794891 2039-Jun-06 06:00 1.675779365362 -6.8642037 2039-Jun-06 09:00 1.675284338440 -6.8488979 2039-Jun-06 12:00 1.674790417325 -6.8335719 2039-Jun-06 15:00 1.674297603482 -6.8182256 2039-Jun-06 18:00 1.673805898373 -6.8028590 2039-Jun-06 21:00 1.673315303462 -6.7874722 2039-Jun-07 00:00 1.672825820209 -6.7720651 2039-Jun-07 03:00 1.672337450072 -6.7566379 2039-Jun-07 06:00 1.671850194512 -6.7411904 2039-Jun-07 09:00 1.671364054983 -6.7257228 2039-Jun-07 12:00 1.670879032942 -6.7102350 2039-Jun-07 15:00 1.670395129842 -6.6947271 2039-Jun-07 18:00 1.669912347137 -6.6791991 2039-Jun-07 21:00 1.669430686278 -6.6636510 2039-Jun-08 00:00 1.668950148714 -6.6480828 $$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 = '90000381' START_TIME = '2039-Jun-02' STOP_TIME = '2039-Jun-08' STEP_SIZE = '3 hours' QUANTITIES = '19'