******************************************************************************* JPL/HORIZONS 67P/Churyumov-Gerasimenko 2024-May-09 21:29:31 Rec #:90000695 Soln.date: - # obs: 1154 (1969-2004) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2447680.5 ! 1989-Jun-03.0000000 (TDB) RMSW= n.a. EC= .630254 QR= 1.299684 TP= 2447695.8917999999 OM= 51.0115 W= 11.4245 IN= 7.1183 A= 3.51507250923607 MA= 357.6980703162155 ADIST= 5.73046101847214 PER= 6.5903675230002 N= .149555587 ANGMOM= .025039633 DAN= 1.30972 DDN= 5.54325 L= 62.3502342 B= 1.4064848 TP= 1989-Jun-18.3917999999 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 comments 1: soln ref.= SAO/1989 2: k1=7.5;non-gravs. considered; 2008 SAO Comet Catalog ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 9 21:29:31 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 67P/Churyumov-Gerasimenko {source: SAO/198920} 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.240509.p240802 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-09. PREDICTS-> 2024-AUG-01 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= 2447680.5 ! 1989-Jun-03.0000000 (TDB) RMSW= n.a. EC= .630254 QR= 1.299684 TP= 2447695.8917999999 OM= 51.0115 W= 11.4245 IN= 7.1183 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 8.531655387154539E-01 Y= 9.170283602200788E-01 Z= 3.927487437488036E-01 VX=-1.546783422300563E-02 VY= 9.183862514198615E-03 VZ= 6.563293820148183E-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. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Apr-07 00:00 1.213747074275 -0.5784064 2028-Apr-07 03:00 1.213706335030 -0.5502060 2028-Apr-07 06:00 1.213667631821 -0.5220015 2028-Apr-07 09:00 1.213630964943 -0.4937930 2028-Apr-07 12:00 1.213596334675 -0.4655807 2028-Apr-07 15:00 1.213563741278 -0.4373649 2028-Apr-07 18:00 1.213533185002 -0.4091458 2028-Apr-07 21:00 1.213504666077 -0.3809235 2028-Apr-08 00:00 1.213478184720 -0.3526984 2028-Apr-08 03:00 1.213453741132 -0.3244706 2028-Apr-08 06:00 1.213431335499 -0.2962403 2028-Apr-08 09:00 1.213410967991 -0.2680078 2028-Apr-08 12:00 1.213392638761 -0.2397732 2028-Apr-08 15:00 1.213376347949 -0.2115368 2028-Apr-08 18:00 1.213362095678 -0.1832988 2028-Apr-08 21:00 1.213349882056 -0.1550595 2028-Apr-09 00:00 1.213339707174 -0.1268189 2028-Apr-09 03:00 1.213331571111 -0.0985774 2028-Apr-09 06:00 1.213325473926 -0.0703351 2028-Apr-09 09:00 1.213321415665 -0.0420923 2028-Apr-09 12:00 1.213319396358 -0.0138492 2028-Apr-09 15:00 1.213319416020 0.0143940 2028-Apr-09 18:00 1.213321474650 0.0426370 2028-Apr-09 21:00 1.213325572230 0.0708798 2028-Apr-10 00:00 1.213331708729 0.0991220 2028-Apr-10 03:00 1.213339884099 0.1273634 2028-Apr-10 06:00 1.213350098277 0.1556038 2028-Apr-10 09:00 1.213362351182 0.1838431 2028-Apr-10 12:00 1.213376642722 0.2120809 2028-Apr-10 15:00 1.213392972786 0.2403172 2028-Apr-10 18:00 1.213411341249 0.2685515 2028-Apr-10 21:00 1.213431747969 0.2967838 2028-Apr-11 00:00 1.213454192790 0.3250139 2028-Apr-11 03:00 1.213478675539 0.3532414 2028-Apr-11 06:00 1.213505196030 0.3814663 2028-Apr-11 09:00 1.213533754058 0.4096882 2028-Apr-11 12:00 1.213564349405 0.4379070 2028-Apr-11 15:00 1.213596981837 0.4661225 2028-Apr-11 18:00 1.213631651104 0.4943344 2028-Apr-11 21:00 1.213668356941 0.5225425 2028-Apr-12 00:00 1.213707099067 0.5507467 $$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 ******************************************************************************* !$$SOF COMMAND = '90000695' START_TIME = '2028-Apr-07' STOP_TIME = '2028-Apr-12' STEP_SIZE = '3 hours' QUANTITIES = '19'