API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 67P/Churyumov-Gerasimenko 2024-Apr-27 11:59:47 Rec #:90000700 (+COV) Soln.date: 2024-Feb-01_08:49:50 # obs: 8608 (2008-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457305.5 ! 2015-Oct-10.0000000 (TDB) RMSW= n.a. EC= .6409081306555051 QR= 1.243265641416762 TP= 2457247.5886578634 OM= 50.13557380441372 W= 12.79824973415729 IN= 7.040294906760007 A= 3.462249489765068 MA= 8.859927418784899 ADIST= 5.681233338113374 PER= 6.4423711636744 N= .152991229 ANGMOM= .024570022 DAN= 1.25545 DDN= 5.44002 L= 62.8404707 B= 1.5558267 MOID= .25693199 TP= 2015-Aug-13.0886578634 Comet physical (GM= km^3/s^2; RAD= km): GM= 6.622E-7 RAD= 1.7 M1= 12.9 M2= n.a. k1= 7.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 45.68888 A1= 1.042451038957E-9 A2= -6.739627569914E-11 A3= 2.960945479572E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K213/6, data arc: 2008-06-01 to 2023-04-26 2: k1=7.5; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat Apr 27 11:59:47 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 67P/Churyumov-Gerasimenko {source: JPL#K213/6} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Apr-07 00:00:00.0000 UT Stop time : A.D. 2028-Apr-12 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 2.4, 1.55, 1.2 km {Equator_a, b, pole_c} 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= 2457305.5 ! 2015-Oct-10.0000000 (TDB) RMSW= n.a. EC= .6409081306555051 QR= 1.243265641416762 TP= 2457247.5886578634 OM= 50.13557380441372 W= 12.79824973415729 IN= 7.040294906760007 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-5.017310686400782E-01 Y= 1.157300945518487E+00 Z= 6.681306043628923E-01 VX=-1.804796777549247E-02 VY=-1.430719761134233E-03 VZ= 1.171342386004957E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= 6.622E-7 RAD= 1.7 M1= 12.9 M2= n.a. k1= 7.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 45.68888 A1= 1.042451038957E-9 A2= -6.739627569914E-11 A3= 2.960945479572E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Apr-07 00:00 1.213649279259 -0.5966098 2028-Apr-07 03:00 1.213607226004 -0.5684049 2028-Apr-07 06:00 1.213567209119 -0.5401957 2028-Apr-07 09:00 1.213529228908 -0.5119824 2028-Apr-07 12:00 1.213493285660 -0.4837651 2028-Apr-07 15:00 1.213459379647 -0.4555442 2028-Apr-07 18:00 1.213427511128 -0.4273199 2028-Apr-07 21:00 1.213397680344 -0.3990923 2028-Apr-08 00:00 1.213369887522 -0.3708616 2028-Apr-08 03:00 1.213344132873 -0.3426281 2028-Apr-08 06:00 1.213320416592 -0.3143921 2028-Apr-08 09:00 1.213298738860 -0.2861536 2028-Apr-08 12:00 1.213279099840 -0.2579129 2028-Apr-08 15:00 1.213261499682 -0.2296703 2028-Apr-08 18:00 1.213245938519 -0.2014260 2028-Apr-08 21:00 1.213232416469 -0.1731801 2028-Apr-09 00:00 1.213220933634 -0.1449329 2028-Apr-09 03:00 1.213211490100 -0.1166846 2028-Apr-09 06:00 1.213204085939 -0.0884355 2028-Apr-09 09:00 1.213198721207 -0.0601856 2028-Apr-09 12:00 1.213195395943 -0.0319354 2028-Apr-09 15:00 1.213194110172 -0.0036848 2028-Apr-09 18:00 1.213194863902 0.0245657 2028-Apr-09 21:00 1.213197657127 0.0528160 2028-Apr-10 00:00 1.213202489824 0.0810660 2028-Apr-10 03:00 1.213209361957 0.1093153 2028-Apr-10 06:00 1.213218273470 0.1375637 2028-Apr-10 09:00 1.213229224296 0.1658112 2028-Apr-10 12:00 1.213242214350 0.1940573 2028-Apr-10 15:00 1.213257243531 0.2223019 2028-Apr-10 18:00 1.213274311724 0.2505449 2028-Apr-10 21:00 1.213293418798 0.2787859 2028-Apr-11 00:00 1.213314564606 0.3070248 2028-Apr-11 03:00 1.213337748985 0.3352613 2028-Apr-11 06:00 1.213362971759 0.3634952 2028-Apr-11 09:00 1.213390232732 0.3917264 2028-Apr-11 12:00 1.213419531698 0.4199546 2028-Apr-11 15:00 1.213450868430 0.4481796 2028-Apr-11 18:00 1.213484242690 0.4764011 2028-Apr-11 21:00 1.213519654221 0.5046190 2028-Apr-12 00:00 1.213557102753 0.5328331 $$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 *******************************************************************************