API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 125P/Spacewatch 2024-May-22 23:19:04 Rec #:90001030 (+COV) Soln.date: 2024-May-15_12:05:38 # obs: 974 (1991-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456235.5 ! 2012-Nov-04.0000000 (TDB) RMSW= n.a. EC= .5122709371090672 QR= 1.525447955283914 TP= 2456340.4894282869 OM= 153.1905235960668 W= 87.23022368028181 IN= 9.985984699008846 A= 3.127654411738508 MA= 341.2922522746561 ADIST= 4.729860868193102 PER= 5.5314162621178 N= .178186966 ANGMOM= .026127325 DAN= 2.25116 DDN= 2.36545 L= 240.3782081 B= 9.9741994 MOID= .55765402 TP= 2013-Feb-16.9894282869 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 12.7 M2= 16.7 k1= 17. 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= 0. A2= 7.131346967071E-11 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#45, data arc: 1991-09-08 to 2024-05-11 2: k1=17., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Wed May 22 23:19:04 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 125P/Spacewatch {source: JPL#45} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Mar-05 00:00:00.0000 UT Stop time : A.D. 2024-Mar-09 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.8 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.240522.p240815 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-22. PREDICTS-> 2024-AUG-14 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= 2456235.5 ! 2012-Nov-04.0000000 (TDB) RMSW= n.a. EC= .5122709371090672 QR= 1.525447955283914 TP= 2456340.4894282869 OM= 153.1905235960668 W= 87.23022368028181 IN= 9.985984699008846 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.824223210804577E+00 Y=-7.669835340573739E-02 Z= 1.279793245835781E-01 VX= 5.307918766197582E-03 VY=-1.360006944627952E-02 VZ=-3.949467541081200E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 12.7 M2= 16.7 k1= 17. 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= 0. A2= 7.131346967071E-11 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2024-Mar-05 00:00 1.526866215992 -0.2593673 2024-Mar-05 03:00 1.526847998501 -0.2453012 2024-Mar-05 06:00 1.526830796549 -0.2312344 2024-Mar-05 09:00 1.526814610194 -0.2171668 2024-Mar-05 12:00 1.526799439488 -0.2030984 2024-Mar-05 15:00 1.526785284481 -0.1890294 2024-Mar-05 18:00 1.526772145221 -0.1749598 2024-Mar-05 21:00 1.526760021750 -0.1608896 2024-Mar-06 00:00 1.526748914108 -0.1468189 2024-Mar-06 03:00 1.526738822331 -0.1327477 2024-Mar-06 06:00 1.526729746453 -0.1186761 2024-Mar-06 09:00 1.526721686504 -0.1046040 2024-Mar-06 12:00 1.526714642509 -0.0905317 2024-Mar-06 15:00 1.526708614493 -0.0764590 2024-Mar-06 18:00 1.526703602474 -0.0623861 2024-Mar-06 21:00 1.526699606470 -0.0483129 2024-Mar-07 00:00 1.526696626493 -0.0342397 2024-Mar-07 03:00 1.526694662552 -0.0201663 2024-Mar-07 06:00 1.526693714656 -0.0060928 2024-Mar-07 09:00 1.526693782805 0.0079807 2024-Mar-07 12:00 1.526694867001 0.0220542 2024-Mar-07 15:00 1.526696967239 0.0361275 2024-Mar-07 18:00 1.526700083513 0.0502008 2024-Mar-07 21:00 1.526704215812 0.0642739 2024-Mar-08 00:00 1.526709364122 0.0783468 2024-Mar-08 03:00 1.526715528426 0.0924194 2024-Mar-08 06:00 1.526722708704 0.1064918 2024-Mar-08 09:00 1.526730904932 0.1205637 2024-Mar-08 12:00 1.526740117082 0.1346353 2024-Mar-08 15:00 1.526750345126 0.1487064 2024-Mar-08 18:00 1.526761589028 0.1627771 2024-Mar-08 21:00 1.526773848751 0.1768472 2024-Mar-09 00:00 1.526787124256 0.1909167 $$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 *******************************************************************************