******************************************************************************* JPL/HORIZONS 19P/Borrelly 2024-May-02 02:17:27 Rec #:90000304 (+COV) Soln.date: 2024-Apr-22_10:21:16 # obs: 2445 (2014-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459277.5 ! 2021-Mar-04.0000000 (TDB) RMSW= n.a. EC= .6379169523065308 QR= 1.30602082303394 TP= 2459612.2631662302 OM= 74.30163917249709 W= 351.8611443404037 IN= 29.31902980947663 A= 3.606964842329724 MA= 311.8352980769099 ADIST= 5.907908861625508 PER= 6.8504809988753 N= .143876946 ANGMOM= .025159525 DAN= 1.31116 DDN= 5.8049 L= 67.1938849 B= -3.9751692 MOID= .32451001 TP= 2022-Feb-01.7631662302 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= 3.128955364227E-9 A2= -5.707781016827E-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#K222/15, data arc: 2014-07-29 to 2024-04-18 2: k1=14.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 2 02:17:27 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 19P/Borrelly {source: JPL#K222/15} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Dec-11 20:00:00.0000 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.240501.p240725 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-01. PREDICTS-> 2024-JUL-24 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= 2459277.5 ! 2021-Mar-04.0000000 (TDB) RMSW= n.a. EC= .6379169523065308 QR= 1.30602082303394 TP= 2459612.2631662302 OM= 74.30163917249709 W= 351.8611443404037 IN= 29.31902980947663 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.434501508756176E+00 Y=-2.111364234946459E+00 Z=-2.228368145546027E+00 VX= 3.152401528420522E-03 VY= 8.466180933168799E-03 VZ= 3.317945119886062E-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= 3.128955364227E-9 A2= -5.707781016827E-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 ************************************************** $$SOE 2028-Dec-11 20:00 1.309950679956 -0.0067686 2028-Dec-11 20:10 1.309950655458 -0.0054476 2028-Dec-11 20:20 1.309950636258 -0.0041266 2028-Dec-11 20:30 1.309950622357 -0.0028056 2028-Dec-11 20:40 1.309950613754 -0.0014846 2028-Dec-11 20:50 1.309950610448 -0.0001636 2028-Dec-11 21:00 1.309950612441 0.0011574 2028-Dec-11 21:10 1.309950619733 0.0024785 2028-Dec-11 21:20 1.309950632322 0.0037995 2028-Dec-11 21:30 1.309950650210 0.0051205 2028-Dec-11 21:40 1.309950673396 0.0064415 2028-Dec-11 21:50 1.309950701880 0.0077625 2028-Dec-11 22:00 1.309950735662 0.0090835 2028-Dec-11 22:10 1.309950774742 0.0104045 2028-Dec-11 22:20 1.309950819121 0.0117255 2028-Dec-11 22:30 1.309950868798 0.0130466 2028-Dec-11 22:40 1.309950923773 0.0143676 2028-Dec-11 22:50 1.309950984046 0.0156886 2028-Dec-11 23:00 1.309951049617 0.0170096 2028-Dec-11 23:10 1.309951120487 0.0183306 2028-Dec-11 23:20 1.309951196655 0.0196516 2028-Dec-11 23:30 1.309951278120 0.0209726 2028-Dec-11 23:40 1.309951364885 0.0222936 2028-Dec-11 23:50 1.309951456947 0.0236146 2028-Dec-12 00:00 1.309951554307 0.0249356 $$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 20:00' STOP_TIME = '2028-Dec-12' STEP_SIZE = '10 minutes' QUANTITIES = '19'