API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 81P/Wild 2 2024-Apr-28 06:19:10 Rec #:90000860 (+COV) Soln.date: 2024-Feb-21_09:54:37 # obs: 2767 (2014-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458789.5 ! 2019-Nov-02.0000000 (TDB) RMSW= n.a. EC= .5374217813342542 QR= 1.595752076661422 TP= 2459929.2776952349 OM= 136.1107286815015 W= 41.72591508128146 IN= 3.237044051464707 A= 3.449691343583335 MA= 184.670954143113 ADIST= 5.303630610505247 PER= 6.4073516634508 N= .153827406 ANGMOM= .026943913 DAN= 1.75102 DDN= 4.0964 L= 177.7912011 B= 2.1538342 MOID= .60153502 TP= 2022-Dec-15.7776952349 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2. M1= 9.8 M2= 12.9 k1= 12.5 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= -125.7045 A1= 2.752351164818E-9 A2= 3.107319399714E-10 A3= -1.039001792669E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K222/32, data arc: 2014-10-17 to 2023-10-12 2: k1=12.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun Apr 28 06:19:10 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 81P/Wild 2 {source: JPL#K222/32} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2029-May-14 00:00:00.0000 UT Stop time : A.D. 2029-May-16 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 2. 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.240426.p240720 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-26. PREDICTS-> 2024-JUL-19 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= 2458789.5 ! 2019-Nov-02.0000000 (TDB) RMSW= n.a. EC= .5374217813342542 QR= 1.595752076661422 TP= 2459929.2776952349 OM= 136.1107286815015 W= 41.72591508128146 IN= 3.237044051464707 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 5.296796767629163E+00 Y= 3.582935393466545E-02 Z=-2.086026994633838E-01 VX=-1.316276016957767E-04 VY= 4.741082540189919E-03 VZ= 1.835455471781527E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2. M1= 9.8 M2= 12.9 k1= 12.5 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= -125.7045 A1= 2.752351164818E-9 A2= 3.107319399714E-10 A3= -1.039001792669E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2029-May-14 00:00 1.590532111738 -0.0548115 2029-May-14 03:00 1.590528647076 -0.0411745 2029-May-14 06:00 1.590526166889 -0.0275374 2029-May-14 09:00 1.590524671183 -0.0139001 2029-May-14 12:00 1.590524159964 -0.0002628 2029-May-14 15:00 1.590524633235 0.0133745 2029-May-14 18:00 1.590526090993 0.0270117 2029-May-14 21:00 1.590528533236 0.0406489 2029-May-15 00:00 1.590531959956 0.0542860 2029-May-15 03:00 1.590536371143 0.0679229 2029-May-15 06:00 1.590541766785 0.0815596 2029-May-15 09:00 1.590548146866 0.0951961 2029-May-15 12:00 1.590555511367 0.1088323 2029-May-15 15:00 1.590563860267 0.1224682 2029-May-15 18:00 1.590573193541 0.1361037 2029-May-15 21:00 1.590583511160 0.1497389 2029-May-16 00:00 1.590594813096 0.1633735 $$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 *******************************************************************************