******************************************************************************* JPL/HORIZONS 311P/PANSTARRS 2024-May-23 20:58:40 Rec #:90001271 (+COV) Soln.date: 2024-Jan-04_23:43:58 # obs: 268 (2005-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457818.5 ! 2017-Mar-06.0000000 (TDB) RMSW= n.a. EC= .1156926762017333 QR= 1.935540192037535 TP= 2457945.1991276843 OM= 279.2621383082477 W= 144.0041487030205 IN= 4.966392387174035 A= 2.188764177281745 MA= 321.4362516249583 ADIST= 2.441988162525956 PER= 3.2382223094933 N= .304372643 ANGMOM= .025278705 DAN= 2.38247 DDN= 1.97464 L= 63.3687051 B= 2.9164868 MOID= .950809 TP= 2017-Jul-10.6991276843 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 19. M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#38, data arc: 2005-01-17 to 2024-01-02 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 23 20:58:40 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 311P/PANSTARRS {source: JPL#38} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Jan-01 00:00:00.0000 UT Stop time : A.D. 2024-Jan-02 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.240523.p240816 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-23. PREDICTS-> 2024-AUG-15 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= 2457818.5 ! 2017-Mar-06.0000000 (TDB) RMSW= n.a. EC= .1156926762017333 QR= 1.935540192037535 TP= 2457945.1991276843 OM= 279.2621383082477 W= 144.0041487030205 IN= 4.966392387174035 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.924221949698137E+00 Y= 4.194953702956145E-01 Z= 3.698564996715618E-01 VX=-4.315658279147162E-03 VY= 1.099414642208543E-02 VZ= 4.544449615174648E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 19. M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2024-Jan-01 00:00 1.935226465603 -0.0155146 2024-Jan-01 01:00 1.935226100232 -0.0148530 2024-Jan-01 02:00 1.935225750780 -0.0141915 2024-Jan-01 03:00 1.935225417248 -0.0135299 2024-Jan-01 04:00 1.935225099634 -0.0128684 2024-Jan-01 05:00 1.935224797940 -0.0122068 2024-Jan-01 06:00 1.935224512164 -0.0115453 2024-Jan-01 07:00 1.935224242308 -0.0108837 2024-Jan-01 08:00 1.935223988372 -0.0102221 2024-Jan-01 09:00 1.935223750354 -0.0095606 2024-Jan-01 10:00 1.935223528256 -0.0088990 2024-Jan-01 11:00 1.935223322076 -0.0082375 2024-Jan-01 12:00 1.935223131816 -0.0075759 2024-Jan-01 13:00 1.935222957476 -0.0069144 2024-Jan-01 14:00 1.935222799054 -0.0062528 2024-Jan-01 15:00 1.935222656552 -0.0055912 2024-Jan-01 16:00 1.935222529969 -0.0049297 2024-Jan-01 17:00 1.935222419305 -0.0042681 2024-Jan-01 18:00 1.935222324560 -0.0036066 2024-Jan-01 19:00 1.935222245735 -0.0029450 2024-Jan-01 20:00 1.935222182828 -0.0022834 2024-Jan-01 21:00 1.935222135841 -0.0016219 2024-Jan-01 22:00 1.935222104773 -0.0009603 2024-Jan-01 23:00 1.935222089624 -0.0002988 2024-Jan-02 00:00 1.935222090395 0.0003628 $$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 = '311P' QUANTITIES = '19' START_TIME = '2024-Jan-01' STEP_SIZE = '1 hour' STOP_TIME = '2024-Jan-02'