API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 87P/Bus 2024-May-05 17:16:07 Rec #:90000887 (+COV) Soln.date: 2020-Sep-28_09:20:31 # obs: 667 (1999-2020) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457467.5 ! 2016-Mar-20.0000000 (TDB) RMSW= n.a. EC= .3893476920698341 QR= 2.101174815284378 TP= 2456646.4014816154 OM= 181.8898060895848 W= 24.75638615410691 IN= 2.6023944932398 A= 3.440869358876915 MA= 126.7935222832964 ADIST= 4.780563902469451 PER= 6.3827888553157 N= .154419378 ANGMOM= .029391247 DAN= 2.15672 DDN= 4.51594 L= 206.6237175 B= 1.0894722 MOID= 1.09780002 TP= 2013-Dec-19.9014816154 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .280 M1= 12.7 M2= 16.1 k1= 14. 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= 1.255996584892E-8 A2= -2.017205059528E-9 A3= 5.855153203011E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K203/18, data arc: 1999-11-13 to 2020-09-05 2: k1=14., k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun May 5 17:16:08 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 87P/Bus {source: JPL#K203/18} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2029-Jun-05 00:00:00.0000 UT Stop time : A.D. 2029-Jun-10 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.28 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.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= 2457467.5 ! 2016-Mar-20.0000000 (TDB) RMSW= n.a. EC= .3893476920698341 QR= 2.101174815284378 TP= 2456646.4014816154 OM= 181.8898060895848 W= 24.75638615410691 IN= 2.6023944932398 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 4.480094669245180E+00 Y= 7.057537816046455E-03 Z= 9.863994947133414E-03 VX= 1.735196995959621E-03 VY= 6.134004906874546E-03 VZ= 2.337564333482295E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .280 M1= 12.7 M2= 16.1 k1= 14. 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= 1.255996584892E-8 A2= -2.017205059528E-9 A3= 5.855153203011E-9 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2029-Jun-05 00:00 3.693749413915 -0.0169341 2029-Jun-05 03:00 3.693748222226 -0.0160808 2029-Jun-05 06:00 3.693747092138 -0.0152276 2029-Jun-05 09:00 3.693746023648 -0.0143743 2029-Jun-05 12:00 3.693745016758 -0.0135210 2029-Jun-05 15:00 3.693744071466 -0.0126677 2029-Jun-05 18:00 3.693743187772 -0.0118145 2029-Jun-05 21:00 3.693742365675 -0.0109612 2029-Jun-06 00:00 3.693741605176 -0.0101080 2029-Jun-06 03:00 3.693740906273 -0.0092547 2029-Jun-06 06:00 3.693740268966 -0.0084015 2029-Jun-06 09:00 3.693739693255 -0.0075483 2029-Jun-06 12:00 3.693739179139 -0.0066950 2029-Jun-06 15:00 3.693738726617 -0.0058418 2029-Jun-06 18:00 3.693738335690 -0.0049886 2029-Jun-06 21:00 3.693738006356 -0.0041354 2029-Jun-07 00:00 3.693737738615 -0.0032822 2029-Jun-07 03:00 3.693737532467 -0.0024290 2029-Jun-07 06:00 3.693737387911 -0.0015758 2029-Jun-07 09:00 3.693737304946 -0.0007227 2029-Jun-07 12:00 3.693737283572 0.0001305 2029-Jun-07 15:00 3.693737323788 0.0009837 2029-Jun-07 18:00 3.693737425594 0.0018368 2029-Jun-07 21:00 3.693737588989 0.0026900 2029-Jun-08 00:00 3.693737813972 0.0035431 2029-Jun-08 03:00 3.693738100544 0.0043962 2029-Jun-08 06:00 3.693738448702 0.0052493 2029-Jun-08 09:00 3.693738858448 0.0061024 2029-Jun-08 12:00 3.693739329779 0.0069555 2029-Jun-08 15:00 3.693739862696 0.0078086 2029-Jun-08 18:00 3.693740457197 0.0086617 2029-Jun-08 21:00 3.693741113282 0.0095148 2029-Jun-09 00:00 3.693741830951 0.0103679 2029-Jun-09 03:00 3.693742610203 0.0112209 2029-Jun-09 06:00 3.693743451037 0.0120740 2029-Jun-09 09:00 3.693744353452 0.0129270 2029-Jun-09 12:00 3.693745317447 0.0137800 2029-Jun-09 15:00 3.693746343023 0.0146331 2029-Jun-09 18:00 3.693747430178 0.0154861 2029-Jun-09 21:00 3.693748578912 0.0163391 2029-Jun-10 00:00 3.693749789223 0.0171921 $$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 *******************************************************************************