API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 77P/Longmore 2024-May-04 06:42:49 Rec #:90000837 (+COV) Soln.date: 2023-Oct-19_00:59:03 # obs: 2584 (1975-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456632.5 ! 2013-Dec-06.0000000 (TDB) RMSW= n.a. EC= .3541884234361041 QR= 2.33300675189155 TP= 2457523.0342461569 OM= 14.89082988651348 W= 196.9616689369937 IN= 24.34166334606224 A= 3.612519249507019 MA= 232.1680410629424 ADIST= 4.892031747122489 PER= 6.8663107923234 N= .143545248 ANGMOM= .030575882 DAN= 4.77804 DDN= 2.35986 L= 210.4206981 B= -6.9062518 MOID= 1.33719003 TP= 2016-May-14.5342461569 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 4.1 M1= 9.1 M2= 13.3 k1= 14.75 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= 3.261354938149E-10 A2= -4.902221634984E-10 A3= 7.388205826283E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#73, data arc: 1975-08-11 to 2023-10-09 2: k1=14.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat May 4 06:42:49 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 77P/Longmore {source: JPL#73} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2030-Feb-18 00:00:00.0000 UT Stop time : A.D. 2030-Feb-20 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 4.1 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= 2456632.5 ! 2013-Dec-06.0000000 (TDB) RMSW= n.a. EC= .3541884234361041 QR= 2.33300675189155 TP= 2457523.0342461569 OM= 14.89082988651348 W= 196.9616689369937 IN= 24.34166334606224 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 2.405393988405714E+00 Y= 2.855228426742949E+00 Z= 2.691602050275344E+00 VX=-6.453045631463922E-03 VY= 9.517818629150179E-04 VZ= 2.031511617228391E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 4.1 M1= 9.1 M2= 13.3 k1= 14.75 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= 3.261354938149E-10 A2= -4.902221634984E-10 A3= 7.388205826283E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2030-Feb-18 00:00 2.337731507988 -0.0186562 2030-Feb-18 03:00 2.337730310858 -0.0145059 2030-Feb-18 06:00 2.337729413375 -0.0103556 2030-Feb-18 09:00 2.337728815542 -0.0062052 2030-Feb-18 12:00 2.337728517358 -0.0020549 2030-Feb-18 15:00 2.337728518824 0.0020955 2030-Feb-18 18:00 2.337728819941 0.0062459 2030-Feb-18 21:00 2.337729420708 0.0103962 2030-Feb-19 00:00 2.337730321125 0.0145466 2030-Feb-19 03:00 2.337731521193 0.0186969 2030-Feb-19 06:00 2.337733020910 0.0228473 2030-Feb-19 09:00 2.337734820275 0.0269976 2030-Feb-19 12:00 2.337736919287 0.0311479 2030-Feb-19 15:00 2.337739317946 0.0352982 2030-Feb-19 18:00 2.337742016250 0.0394485 2030-Feb-19 21:00 2.337745014196 0.0435988 2030-Feb-20 00:00 2.337748311783 0.0477490 $$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 *******************************************************************************