******************************************************************************* JPL/HORIZONS 19P/Borrelly 2024-May-02 04:35:34 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 04:35:35 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-05 19:12:00.0000 UT Stop time : A.D. 2028-Dec-06 00:00:00.0000 UT Step-size : 1440 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 delta deldot VmagSn VmagOb RNG_3sigma RNGRT_3sig ******************************************************************************************************************************** $$SOE 2028-Dec-05 19:12 1.311971488875 -1.1517641 0.41268721714448 0.0004682 33.2656736 17.3005160 37274.1339 0.0058486 $$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. STATISTICAL UNCERTAINTIES Output includes formal +/- 3 standard-deviation statistical orbit uncertainty quantities. There is a 99.7% (1-D) or 98.9% (2-D) chance the actual value is within given bounds. These statistical calculations assume observational data errors are random. If there are systematic biases (such as timing, reduction or star-catalog errors), results can be optimistic. Because the epoch covariance is mapped using linearized variational partial derivatives, results can also be optimistic for times far from the solution epoch, particularly for objects having close planetary encounters. '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 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S 'RNG_3sigma RNGRT_3sig' = Range and range rate (radial velocity) formal 3-standard-deviation uncertainties. Units: KM, 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 = 'DES=19P;CAP' START_TIME = '2028-Dec-05 19:12' STOP_TIME = '2028-Dec-06' STEP_SIZE = '1 day' QUANTITIES = '19,20,22,39'