******************************************************************************* JPL/HORIZONS 19P/Borrelly 2024-May-11 08:43:27 Rec #:90000304 (+COV) Soln.date: 2024-May-07_15:45:24 # obs: 2448 (2014-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459279.5 ! 2021-Mar-06.0000000 (TDB) RMSW= n.a. EC= .6379142826709171 QR= 1.306030392689949 TP= 2459612.2640646263 OM= 74.3008430980156 W= 351.8616071958483 IN= 29.31866222799612 A= 3.606964677656586 MA= 312.1229194313303 ADIST= 5.907898962623222 PER= 6.8504805297453 N= .143876956 ANGMOM= .025159596 DAN= 1.31117 DDN= 5.8049 L= 67.19346899999999 B= -3.9748989 MOID= .32416099 TP= 2022-Feb-01.7640646263 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 9.8 M2= 13.2 k1= 14.5 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= 0. A1= 3.132933080196E-9 A2= -5.854750797153E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K222/16, data arc: 2014-07-29 to 2024-05-02 2: k1=14.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat May 11 08:43:27 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 19P/Borrelly {source: JPL#K222/16} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Dec-11 21:00:00.0000 UT Stop time : A.D. 2028-Dec-12 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 4.22, 4.22, 4.22 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.240510.p240803 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-10. PREDICTS-> 2024-AUG-02 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= 2459279.5 ! 2021-Mar-06.0000000 (TDB) RMSW= n.a. EC= .6379142826709171 QR= 1.306030392689949 TP= 2459612.2640646263 OM= 74.3008430980156 W= 351.8616071958483 IN= 29.31866222799612 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.440784269517697E+00 Y=-2.094399844488573E+00 Z=-2.221698181540450E+00 VX= 3.130472354852565E-03 VY= 8.498310455780908E-03 VZ= 3.352011161413441E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 9.8 M2= 13.2 k1= 14.5 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= 0. A1= 3.132933080196E-9 A2= -5.854750797153E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Dec-11 21:00 1.309950510226 0.0015707 2028-Dec-11 21:10 1.309950519174 0.0028917 2028-Dec-11 21:20 1.309950533421 0.0042127 2028-Dec-11 21:30 1.309950552966 0.0055337 2028-Dec-11 21:40 1.309950577810 0.0068547 2028-Dec-11 21:50 1.309950607951 0.0081758 2028-Dec-11 22:00 1.309950643391 0.0094968 2028-Dec-11 22:10 1.309950684129 0.0108178 2028-Dec-11 22:20 1.309950730165 0.0121388 2028-Dec-11 22:30 1.309950781499 0.0134598 2028-Dec-11 22:40 1.309950838131 0.0147808 2028-Dec-11 22:50 1.309950900062 0.0161018 2028-Dec-11 23:00 1.309950967291 0.0174228 2028-Dec-11 23:10 1.309951039818 0.0187438 2028-Dec-11 23:20 1.309951117643 0.0200649 2028-Dec-11 23:30 1.309951200766 0.0213859 2028-Dec-11 23:40 1.309951289188 0.0227069 2028-Dec-11 23:50 1.309951382907 0.0240279 2028-Dec-12 00:00 1.309951481925 0.0253489 $$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 = '90000304' START_TIME = '2028-Dec-11 21:00' STOP_TIME = '2028-Dec-12' STEP_SIZE = '10 minutes' QUANTITIES = '19'