******************************************************************************* JPL/HORIZONS 23P/Brorsen-Metcalf 2024-Apr-30 18:20:39 Rec #:90000342 (+COV) Soln.date: 2002-Mar-01_13:24:57 # obs: 223 (1847-1989) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2447800.5 ! 1989-Oct-01.0000000 (TDB) RMSW= n.a. EC= .971952257924851 QR= .4787527107248575 TP= 2447781.4374331348 OM= 311.5854622141069 W= 129.6106836788667 IN= 19.33394046981863 A= 17.0692068346223 MA= .2664191525491584 ADIST= 33.65966095851974 PER= 70.52258349709901 N= .013976038 ANGMOM= .016714187 DAN= 2.48236 DDN= .58288 L= 82.8377514 B= 14.7769684 MOID= .193872 TP= 1989-Sep-11.9374331348 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.8 M2= 14. k1= 8. 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= 2.246546894312E-9 A2= -5.326929315925E-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#13, data arc: 1847-08-01 to 1989-09-09 2: k1=8.0, k2=5.0, phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Tue Apr 30 18:20:39 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 23P/Brorsen-Metcalf {source: JPL#13} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2059-Jun-05 00:00:00.0000 UT Stop time : A.D. 2059-Jun-11 00:00:00.0000 UT Step-size : 180 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.240430.p240724 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-30. PREDICTS-> 2024-JUL-23 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= 2447800.5 ! 1989-Oct-01.0000000 (TDB) RMSW= n.a. EC= .971952257924851 QR= .4787527107248575 TP= 2447781.4374331348 OM= 311.5854622141069 W= 129.6106836788667 IN= 19.33394046981863 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-5.310902703703485E-01 Y= 3.739544058680663E-01 Z= 1.082325983156254E-01 VX=-2.604653625270623E-02 VY=-6.155171614251693E-03 VZ=-1.284957462088505E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 7.8 M2= 14. k1= 8. 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= 2.246546894312E-9 A2= -5.326929315925E-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 2059-Jun-05 00:00 0.491268704291 -7.8072892 2059-Jun-05 03:00 0.490714061700 -7.5578463 2059-Jun-05 06:00 0.490177468479 -7.3072738 2059-Jun-05 09:00 0.489659005014 -7.0556038 2059-Jun-05 12:00 0.489158749355 -6.8028689 2059-Jun-05 15:00 0.488676777167 -6.5491027 2059-Jun-05 18:00 0.488213161680 -6.2943390 2059-Jun-05 21:00 0.487767973643 -6.0386127 2059-Jun-06 00:00 0.487341281277 -5.7819590 2059-Jun-06 03:00 0.486933150236 -5.5244137 2059-Jun-06 06:00 0.486543643560 -5.2660135 2059-Jun-06 09:00 0.486172821633 -5.0067952 2059-Jun-06 12:00 0.485820742146 -4.7467966 2059-Jun-06 15:00 0.485487460060 -4.4860558 2059-Jun-06 18:00 0.485173027562 -4.2246112 2059-Jun-06 21:00 0.484877494041 -3.9625021 2059-Jun-07 00:00 0.484600906044 -3.6997678 2059-Jun-07 03:00 0.484343307252 -3.4364485 2059-Jun-07 06:00 0.484104738447 -3.1725843 2059-Jun-07 09:00 0.483885237483 -2.9082161 2059-Jun-07 12:00 0.483684839266 -2.6433849 2059-Jun-07 15:00 0.483503575721 -2.3781320 2059-Jun-07 18:00 0.483341475777 -2.1124992 2059-Jun-07 21:00 0.483198565346 -1.8465284 2059-Jun-08 00:00 0.483074867301 -1.5802617 2059-Jun-08 03:00 0.482970401465 -1.3137416 2059-Jun-08 06:00 0.482885184594 -1.0470106 2059-Jun-08 09:00 0.482819230366 -0.7801113 2059-Jun-08 12:00 0.482772549373 -0.5130867 2059-Jun-08 15:00 0.482745149110 -0.2459797 2059-Jun-08 18:00 0.482737033975 0.0211669 2059-Jun-08 21:00 0.482748205261 0.2883100 2059-Jun-09 00:00 0.482778661156 0.5554067 2059-Jun-09 03:00 0.482828396748 0.8224138 2059-Jun-09 06:00 0.482897404025 1.0892887 2059-Jun-09 09:00 0.482985671879 1.3559884 2059-Jun-09 12:00 0.483093186119 1.6224703 2059-Jun-09 15:00 0.483219929476 1.8886918 2059-Jun-09 18:00 0.483365881619 2.1546107 2059-Jun-09 21:00 0.483531019165 2.4201847 2059-Jun-10 00:00 0.483715315699 2.6853720 2059-Jun-10 03:00 0.483918741791 2.9501309 2059-Jun-10 06:00 0.484141265014 3.2144202 2059-Jun-10 09:00 0.484382849972 3.4781987 2059-Jun-10 12:00 0.484643458318 3.7414259 2059-Jun-10 15:00 0.484923048784 4.0040614 2059-Jun-10 18:00 0.485221577207 4.2660655 2059-Jun-10 21:00 0.485538996564 4.5273985 2059-Jun-11 00:00 0.485875256995 4.7880216 $$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 = '90000342' START_TIME = '2059-Jun-05' STOP_TIME = '2059-Jun-11' STEP_SIZE = '3 hours' QUANTITIES = '19'