API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 66P/du Toit 2024-May-04 08:32:58 Rec #:90000688 Soln.date: - # obs: 31 (1944-2003) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2431240.5 ! 1944-May-30.0000000 (TDB) RMSW= n.a. EC= .787979 QR= 1.276935 TP= 2431258.9953000001 OM= 23.1474 W= 257.0257 IN= 18.7501 A= 6.022681715490446 MA= 358.7666663368045 ADIST= 10.76842843098089 PER= 14.780634262141 N= .066683626 ANGMOM= .02599244 DAN= 2.77386 DDN= 1.93993 L= 279.472576 B= -18.2542955 TP= 1944-Jun-17.4953000001 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= n.a. k1= 7. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO/1944 2: k1=7.;non-gravs. considered; 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat May 4 08:32:58 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 66P/du Toit {source: SAO/194420} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1821-Nov-23 00:00:00.0000 UT Stop time : A.D. 1821-Nov-29 00:00:00.0000 UT Step-size : 180 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= 2431240.5 ! 1944-May-30.0000000 (TDB) RMSW= n.a. EC= .787979 QR= 1.276935 TP= 2431258.9953000001 OM= 23.1474 W= 257.0257 IN= 18.7501 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.710752041860523E-01 Y=-9.908259276244031E-01 Z=-8.256964855234474E-01 VX= 1.998138491352516E-02 VY= 1.589795092822293E-03 VZ=-1.989915954237576E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 15.7 M2= n.a. k1= 7. k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 1821-Nov-23 00:00 8.630097280153 -5.5822844 1821-Nov-23 03:00 8.629694210795 -5.5829191 1821-Nov-23 06:00 8.629291095644 -5.5835538 1821-Nov-23 09:00 8.628887934697 -5.5841886 1821-Nov-23 12:00 8.628484727951 -5.5848235 1821-Nov-23 15:00 8.628081475401 -5.5854583 1821-Nov-23 18:00 8.627678177045 -5.5860933 1821-Nov-23 21:00 8.627274832879 -5.5867283 1821-Nov-24 00:00 8.626871442900 -5.5873633 1821-Nov-24 03:00 8.626468007103 -5.5879984 1821-Nov-24 06:00 8.626064525486 -5.5886335 1821-Nov-24 09:00 8.625660998045 -5.5892687 1821-Nov-24 12:00 8.625257424777 -5.5899040 1821-Nov-24 15:00 8.624853805678 -5.5905393 1821-Nov-24 18:00 8.624450140744 -5.5911746 1821-Nov-24 21:00 8.624046429972 -5.5918100 1821-Nov-25 00:00 8.623642673359 -5.5924454 1821-Nov-25 03:00 8.623238870901 -5.5930809 1821-Nov-25 06:00 8.622835022595 -5.5937165 1821-Nov-25 09:00 8.622431128436 -5.5943521 1821-Nov-25 12:00 8.622027188423 -5.5949877 1821-Nov-25 15:00 8.621623202550 -5.5956234 1821-Nov-25 18:00 8.621219170815 -5.5962592 1821-Nov-25 21:00 8.620815093215 -5.5968950 1821-Nov-26 00:00 8.620410969745 -5.5975309 1821-Nov-26 03:00 8.620006800402 -5.5981668 1821-Nov-26 06:00 8.619602585184 -5.5988027 1821-Nov-26 09:00 8.619198324085 -5.5994387 1821-Nov-26 12:00 8.618794017103 -5.6000748 1821-Nov-26 15:00 8.618389664235 -5.6007109 1821-Nov-26 18:00 8.617985265477 -5.6013471 1821-Nov-26 21:00 8.617580820824 -5.6019833 1821-Nov-27 00:00 8.617176330275 -5.6026195 1821-Nov-27 03:00 8.616771793826 -5.6032558 1821-Nov-27 06:00 8.616367211472 -5.6038922 1821-Nov-27 09:00 8.615962583211 -5.6045286 1821-Nov-27 12:00 8.615557909038 -5.6051651 1821-Nov-27 15:00 8.615153188952 -5.6058016 1821-Nov-27 18:00 8.614748422947 -5.6064382 1821-Nov-27 21:00 8.614343611022 -5.6070748 1821-Nov-28 00:00 8.613938753171 -5.6077115 1821-Nov-28 03:00 8.613533849392 -5.6083482 1821-Nov-28 06:00 8.613128899681 -5.6089849 1821-Nov-28 09:00 8.612723904035 -5.6096218 1821-Nov-28 12:00 8.612318862451 -5.6102586 1821-Nov-28 15:00 8.611913774924 -5.6108956 1821-Nov-28 18:00 8.611508641451 -5.6115325 1821-Nov-28 21:00 8.611103462030 -5.6121696 1821-Nov-29 00:00 8.610698236656 -5.6128066 $$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 *******************************************************************************