API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 108P/Ciffreo 2024-May-04 21:18:19 Rec #:90000976 (+COV) Soln.date: 2022-Aug-16_21:15:23 # obs: 2301 (2014-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458257.5 ! 2018-May-19.0000000 (TDB) RMSW= n.a. EC= .5810134476572392 QR= 1.526125116349005 TP= 2459498.7281664885 OM= 52.40239463092706 W= 356.8617072910779 IN= 13.98015613499469 A= 3.642420282502351 MA= 184.0170422340922 ADIST= 5.758715448655698 PER= 6.9517362367414 N= .141781312 ANGMOM= .026720482 DAN= 1.52697 DDN= 5.74676 L= 49.3568822 B= -.7578101 MOID= .53518802 TP= 2021-Oct-11.2281664885 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 1.6 M1= 10.9 M2= 15.9 k1= 19.5 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#K212/19, data arc: 2014-06-17 to 2022-03-26 2: k1=19.5, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat May 4 21:18:19 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 108P/Ciffreo {source: JPL#K212/19} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Dec-09 00:00:00.0000 UT Stop time : A.D. 2028-Dec-10 00:00:00.0000 UT Step-size : 30 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 1.6 km 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.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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= 2458257.5 ! 2018-May-19.0000000 (TDB) RMSW= n.a. EC= .5810134476572392 QR= 1.526125116349005 TP= 2459498.7281664885 OM= 52.40239463092706 W= 356.8617072910779 IN= 13.98015613499469 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.651739356585366E+00 Y=-4.100375099701357E+00 Z=-1.729324627439962E+00 VX= 3.569679928093275E-03 VY=-2.077296865505125E-03 VZ=-2.123450738087583E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 1.6 M1= 10.9 M2= 15.9 k1= 19.5 k2= 5. PHCOF= .030 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Dec-09 00:00 1.667980815891 -0.0045773 2028-Dec-09 00:30 1.667980773624 -0.0024486 2028-Dec-09 01:00 1.667980756969 -0.0003199 2028-Dec-09 01:30 1.667980765926 0.0018088 2028-Dec-09 02:00 1.667980800494 0.0039375 2028-Dec-09 02:30 1.667980860675 0.0060662 2028-Dec-09 03:00 1.667980946468 0.0081948 2028-Dec-09 03:30 1.667981057872 0.0103235 2028-Dec-09 04:00 1.667981194888 0.0124522 2028-Dec-09 04:30 1.667981357516 0.0145809 2028-Dec-09 05:00 1.667981545756 0.0167096 2028-Dec-09 05:30 1.667981759608 0.0188383 2028-Dec-09 06:00 1.667981999071 0.0209669 2028-Dec-09 06:30 1.667982264146 0.0230956 2028-Dec-09 07:00 1.667982554833 0.0252243 2028-Dec-09 07:30 1.667982871132 0.0273530 2028-Dec-09 08:00 1.667983213042 0.0294816 2028-Dec-09 08:30 1.667983580564 0.0316103 2028-Dec-09 09:00 1.667983973698 0.0337390 2028-Dec-09 09:30 1.667984392443 0.0358676 2028-Dec-09 10:00 1.667984836800 0.0379963 2028-Dec-09 10:30 1.667985306768 0.0401250 2028-Dec-09 11:00 1.667985802348 0.0422536 2028-Dec-09 11:30 1.667986323540 0.0443823 2028-Dec-09 12:00 1.667986870343 0.0465109 2028-Dec-09 12:30 1.667987442757 0.0486396 2028-Dec-09 13:00 1.667988040782 0.0507682 2028-Dec-09 13:30 1.667988664419 0.0528969 2028-Dec-09 14:00 1.667989313667 0.0550255 2028-Dec-09 14:30 1.667989988527 0.0571541 2028-Dec-09 15:00 1.667990688997 0.0592828 2028-Dec-09 15:30 1.667991415078 0.0614114 2028-Dec-09 16:00 1.667992166771 0.0635400 2028-Dec-09 16:30 1.667992944075 0.0656686 2028-Dec-09 17:00 1.667993746989 0.0677972 2028-Dec-09 17:30 1.667994575514 0.0699258 2028-Dec-09 18:00 1.667995429651 0.0720544 2028-Dec-09 18:30 1.667996309397 0.0741830 2028-Dec-09 19:00 1.667997214755 0.0763116 2028-Dec-09 19:30 1.667998145723 0.0784402 2028-Dec-09 20:00 1.667999102302 0.0805688 2028-Dec-09 20:30 1.668000084491 0.0826973 2028-Dec-09 21:00 1.668001092291 0.0848259 2028-Dec-09 21:30 1.668002125700 0.0869544 2028-Dec-09 22:00 1.668003184720 0.0890830 2028-Dec-09 22:30 1.668004269351 0.0912115 2028-Dec-09 23:00 1.668005379591 0.0933401 2028-Dec-09 23:30 1.668006515441 0.0954686 2028-Dec-10 00:00 1.668007676901 0.0975971 $$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 *******************************************************************************