******************************************************************************* JPL/HORIZONS 6P/d'Arrest 2024-May-08 23:11:35 Rec #:90000144 (+COV) Soln.date: 2022-Nov-23_09:15:27 # obs: 1093 (2014-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459302.5 ! 2021-Mar-29.0000000 (TDB) RMSW= n.a. EC= .6126701232429161 QR= 1.354585254479242 TP= 2459475.2892945483 OM= 138.9371003258597 W= 178.1064598500486 IN= 19.51243094515556 A= 3.497239267521772 MA= 333.9604852802906 ADIST= 5.639893280564301 PER= 6.5402781897043 N= .150700972 ANGMOM= .025424791 DAN= 5.63503 DDN= 1.35487 L= 317.1522355 B= .6323616 MOID= .342594 TP= 2021-Sep-17.7892945483 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 1.6 M1= 15.9 M2= n.a. k1= 8.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.832206360996E-10 A2= -8.473329246044E-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#K212/13, data arc: 2014-03-10 to 2022-03-01 2: k1=8.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 8 23:11:35 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 6P/d'Arrest {source: JPL#K212/13} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Mar-28 00:00:00.0000 UT Stop time : A.D. 2028-Apr-03 00:00:00.0000 UT Step-size : 180 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.240508.p240801 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-08. PREDICTS-> 2024-JUL-31 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= 2459302.5 ! 2021-Mar-29.0000000 (TDB) RMSW= n.a. EC= .6126701232429161 QR= 1.354585254479242 TP= 2459475.2892945483 OM= 138.9371003258597 W= 178.1064598500486 IN= 19.51243094515556 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.540451807014727E+00 Y=-1.648385072459323E+00 Z= 1.044896847611530E-01 VX= 1.270964593084101E-02 VY=-2.326386608196519E-03 VZ=-3.236691163673736E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 1.6 M1= 15.9 M2= n.a. k1= 8.5 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.832206360996E-10 A2= -8.473329246044E-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 ************************************************** $$SOE 2028-Mar-28 00:00 1.352768258073 -0.5799576 2028-Mar-28 03:00 1.352727162153 -0.5585208 2028-Mar-28 06:00 1.352687613964 -0.5370810 2028-Mar-28 09:00 1.352649613717 -0.5156383 2028-Mar-28 12:00 1.352613161611 -0.4941929 2028-Mar-28 15:00 1.352578257841 -0.4727449 2028-Mar-28 18:00 1.352544902592 -0.4512944 2028-Mar-28 21:00 1.352513096040 -0.4298414 2028-Mar-29 00:00 1.352482838355 -0.4083862 2028-Mar-29 03:00 1.352454129696 -0.3869288 2028-Mar-29 06:00 1.352426970216 -0.3654694 2028-Mar-29 09:00 1.352401360059 -0.3440080 2028-Mar-29 12:00 1.352377299361 -0.3225448 2028-Mar-29 15:00 1.352354788250 -0.3010799 2028-Mar-29 18:00 1.352333826844 -0.2796134 2028-Mar-29 21:00 1.352314415256 -0.2581454 2028-Mar-30 00:00 1.352296553588 -0.2366760 2028-Mar-30 03:00 1.352280241935 -0.2152054 2028-Mar-30 06:00 1.352265480383 -0.1937336 2028-Mar-30 09:00 1.352252269011 -0.1722608 2028-Mar-30 12:00 1.352240607890 -0.1507871 2028-Mar-30 15:00 1.352230497080 -0.1293126 2028-Mar-30 18:00 1.352221936635 -0.1078373 2028-Mar-30 21:00 1.352214926602 -0.0863615 2028-Mar-31 00:00 1.352209467017 -0.0648853 2028-Mar-31 03:00 1.352205557909 -0.0434087 2028-Mar-31 06:00 1.352203199298 -0.0219319 2028-Mar-31 09:00 1.352202391198 -0.0004549 2028-Mar-31 12:00 1.352203133613 0.0210220 2028-Mar-31 15:00 1.352205426538 0.0424989 2028-Mar-31 18:00 1.352209269962 0.0639755 2028-Mar-31 21:00 1.352214663864 0.0854518 2028-Apr-01 00:00 1.352221608215 0.1069276 2028-Apr-01 03:00 1.352230102978 0.1284029 2028-Apr-01 06:00 1.352240148109 0.1498775 2028-Apr-01 09:00 1.352251743554 0.1713513 2028-Apr-01 12:00 1.352264889251 0.1928241 2028-Apr-01 15:00 1.352279585131 0.2142960 2028-Apr-01 18:00 1.352295831115 0.2357667 2028-Apr-01 21:00 1.352313627118 0.2572362 2028-Apr-02 00:00 1.352332973044 0.2787043 2028-Apr-02 03:00 1.352353868791 0.3001710 2028-Apr-02 06:00 1.352376314249 0.3216360 2028-Apr-02 09:00 1.352400309297 0.3430993 2028-Apr-02 12:00 1.352425853809 0.3645609 2028-Apr-02 15:00 1.352452947649 0.3860205 2028-Apr-02 18:00 1.352481590674 0.4074780 2028-Apr-02 21:00 1.352511782731 0.4289334 2028-Apr-03 00:00 1.352543523660 0.4503865 $$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 = '90000144' START_TIME = '2028-Mar-28' STOP_TIME = '2028-Apr-03' STEP_SIZE = '3 hours' QUANTITIES = '19'