******************************************************************************* JPL/HORIZONS Africano (C/2018 W2) 2024-May-17 22:01:58 Rec #:90004484 (+COV) Soln.date: 2021-Aug-24_14:05:51 # obs: 1995 (2018-2020) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458691.5 ! 2019-Jul-27.0000000 (TDB) RMSW= n.a. EC= 1.000759657441667 QR= 1.454667716683242 TP= 2458732.2291619512 OM= 181.8494553095173 W= 157.9728542243786 IN= 116.6157705464602 A= -1914.899580909769 MA= -.000479060696780909ADIST= 9.999999E99 PER= 9.999999E99 N= 1.1762E-5 ANGMOM= .029346803 DAN= 40.26089 DDN= 1.50979 L= 12.1229411 B= 19.5909392 MOID= .493664 TP= 2019-Sep-05.7291619512 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.4 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#23, data arc: 2018-11-27 to 2020-06-15 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri May 17 22:01:58 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Africano (C/2018 W2) {source: JPL#23} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2019-Oct-04 00:00:00.0000 UT Stop time : A.D. 2019-Oct-05 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined 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.240517.p240810 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-17. PREDICTS-> 2024-AUG-09 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 ) Table format : Comma Separated Values (spreadsheet) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2458691.5 ! 2019-Jul-27.0000000 (TDB) RMSW= n.a. EC= 1.000759657441667 QR= 1.454667716683242 TP= 2458732.2291619512 OM= 181.8494553095173 W= 157.9728542243786 IN= 116.6157705464602 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 9.271116323537164E-01 Y= 9.683769866221272E-02 Z= 1.257213161534907E+00 VX= 1.203639336350679E-02 VY=-5.026516142009432E-04 VZ=-1.526985806185085E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 13.4 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ***************************************************************************************** Date__(UT)__HR:MN, , , R.A._(ICRF), DEC__(ICRF), dRA*cosD, d(DEC)/dt, T-mag, N-mag, ***************************************************************************************** $$SOE 2019-Oct-04 00:00, , , 23 09 14.48, -05 07 56.1, -229.569, -398.642, 12.862, n.a., 2019-Oct-04 01:00, , , 23 08 59.12, -05 14 34.2, -229.089, -397.786, 12.864, n.a., 2019-Oct-04 02:00, , , 23 08 43.78, -05 21 11.4, -228.607, -396.929, 12.867, n.a., 2019-Oct-04 03:00, , , 23 08 28.48, -05 27 47.8, -228.126, -396.069, 12.869, n.a., 2019-Oct-04 04:00, , , 23 08 13.21, -05 34 23.3, -227.643, -395.207, 12.872, n.a., 2019-Oct-04 05:00, , , 23 07 57.97, -05 40 58.0, -227.161, -394.342, 12.874, n.a., 2019-Oct-04 06:00, , , 23 07 42.75, -05 47 31.8, -226.677, -393.476, 12.877, n.a., 2019-Oct-04 07:00, , , 23 07 27.57, -05 54 04.7, -226.194, -392.607, 12.879, n.a., 2019-Oct-04 08:00, , , 23 07 12.41, -06 00 36.7, -225.710, -391.736, 12.882, n.a., 2019-Oct-04 09:00, , , 23 06 57.29, -06 07 07.9, -225.225, -390.863, 12.884, n.a., 2019-Oct-04 10:00, , , 23 06 42.19, -06 13 38.2, -224.740, -389.989, 12.887, n.a., 2019-Oct-04 11:00, , , 23 06 27.12, -06 20 07.6, -224.255, -389.112, 12.889, n.a., 2019-Oct-04 12:00, , , 23 06 12.08, -06 26 36.1, -223.770, -388.233, 12.892, n.a., 2019-Oct-04 13:00, , , 23 05 57.08, -06 33 03.8, -223.284, -387.353, 12.894, n.a., 2019-Oct-04 14:00, , , 23 05 42.10, -06 39 30.6, -222.798, -386.470, 12.897, n.a., 2019-Oct-04 15:00, , , 23 05 27.15, -06 45 56.5, -222.311, -385.586, 12.899, n.a., 2019-Oct-04 16:00, , , 23 05 12.23, -06 52 21.5, -221.824, -384.701, 12.902, n.a., 2019-Oct-04 17:00, , , 23 04 57.34, -06 58 45.6, -221.337, -383.813, 12.904, n.a., 2019-Oct-04 18:00, , , 23 04 42.47, -07 05 08.9, -220.850, -382.924, 12.907, n.a., 2019-Oct-04 19:00, , , 23 04 27.64, -07 11 31.2, -220.362, -382.034, 12.910, n.a., 2019-Oct-04 20:00, , , 23 04 12.84, -07 17 52.7, -219.874, -381.142, 12.912, n.a., 2019-Oct-04 21:00, , , 23 03 58.07, -07 24 13.2, -219.386, -380.248, 12.915, n.a., 2019-Oct-04 22:00, , , 23 03 43.32, -07 30 32.9, -218.898, -379.353, 12.917, n.a., 2019-Oct-04 23:00, , , 23 03 28.61, -07 36 51.7, -218.409, -378.457, 12.920, n.a., 2019-Oct-05 00:00, , , 23 03 13.92, -07 43 09.5, -217.921, -377.559, 12.923, n.a., $$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.A._(ICRF), DEC__(ICRF),' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'dRA*cosD, d(DEC)/dt,' = The angular rate of change in aparent RA and DEC of the target. This is with respect to the non-inertial IAU76/80 Earth true equator and equinox of-date reference frame. d(RA)/dt is multiplied by the cosine of declination to provide a linear rate in the plane-of-sky. Units: ARCSECONDS PER HOUR 'T-mag, N-mag,' = Comets' apparent visual total magnitude ("T-mag") and nuclear magnitude ("N-mag") using the standard IAU model: T-mag= M1 + 5*log10(delta) + k1*log10(r) N-mag= M2 + 5*log10(delta) + k2*log10(r) + phcof*beta Units: MAGNITUDES 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 = 'C/2018 W2' MAKE_EPHEM = 'YES' TABLE_TYPE = 'OBSERVER' START_TIME = '2019-10-04' STOP_TIME = '2019-10-05' STEP_SIZE = '1 h' QUANTITIES = '1,3,9' CSV_FORMAT = 'YES