******************************************************************************* JPL/HORIZONS 23P/Brorsen-Metcalf 2025-Dec-12 17:54:31 Rec #:90000342 Soln.date: - # obs: 86 (1847-1919) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2422240.5 ! 1919-Oct-09.0000000 (TDB) RMSW= n.a. EC= .971971 QR= .484869 TP= 2422248.8627999998 OM= 311.91 W= 129.4599 IN= 19.2227 A= 17.29883335117202 MA= 359.885440644389 ADIST= 34.11279770234403 PER= 71.95043511181601 N= .013698684 ANGMOM= .016820694 DAN= 2.5012 DDN= .59104 L= 82.9908125 B= 14.725996 TP= 1919-Oct-17.3627999998 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 comments 1: soln ref.= SAO/1919 2: k1=8.0, k2=5.0, phase coef.=0.03;epoch may be 2422241.0 (hour ambiguous: 12h/0h) ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:54:31 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 23P/Brorsen-Metcalf {source: SAO/191920} 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.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-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 ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2422240.5 ! 1919-Oct-09.0000000 (TDB) RMSW= n.a. EC= .971971 QR= .484869 TP= 2422248.8627999998 OM= 311.91 W= 129.4599 IN= 19.2227 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.237121726608025E-01 Y= 2.771098196059525E-01 Z= 3.072626645941777E-01 VX=-2.962260580247054E-02 VY= 1.511241605530712E-02 VZ= 1.884040201471216E-03 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 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2059-Jun-05 00:00 0.730916045486 -28.2227039 2059-Jun-05 03:00 0.728879791719 -28.1862443 2059-Jun-05 06:00 0.726846194298 -28.1491400 2059-Jun-05 09:00 0.724815300058 -28.1113829 2059-Jun-05 12:00 0.722787156439 -28.0729644 2059-Jun-05 15:00 0.720761811489 -28.0338762 2059-Jun-05 18:00 0.718739313869 -27.9941096 2059-Jun-05 21:00 0.716719712861 -27.9536560 2059-Jun-06 00:00 0.714703058378 -27.9125067 2059-Jun-06 03:00 0.712689400965 -27.8706529 2059-Jun-06 06:00 0.710678791810 -27.8280855 2059-Jun-06 09:00 0.708671282751 -27.7847955 2059-Jun-06 12:00 0.706666926279 -27.7407739 2059-Jun-06 15:00 0.704665775550 -27.6960114 2059-Jun-06 18:00 0.702667884387 -27.6504986 2059-Jun-06 21:00 0.700673307291 -27.6042262 2059-Jun-07 00:00 0.698682099446 -27.5571846 2059-Jun-07 03:00 0.696694316725 -27.5093643 2059-Jun-07 06:00 0.694710015700 -27.4607555 2059-Jun-07 09:00 0.692729253644 -27.4113484 2059-Jun-07 12:00 0.690752088544 -27.3611331 2059-Jun-07 15:00 0.688778579102 -27.3100997 2059-Jun-07 18:00 0.686808784748 -27.2582381 2059-Jun-07 21:00 0.684842765641 -27.2055380 2059-Jun-08 00:00 0.682880582678 -27.1519892 2059-Jun-08 03:00 0.680922297504 -27.0975813 2059-Jun-08 06:00 0.678967972513 -27.0423039 2059-Jun-08 09:00 0.677017670859 -26.9861464 2059-Jun-08 12:00 0.675071456463 -26.9290981 2059-Jun-08 15:00 0.673129394017 -26.8711483 2059-Jun-08 18:00 0.671191548991 -26.8122862 2059-Jun-08 21:00 0.669257987642 -26.7525009 2059-Jun-09 00:00 0.667328777017 -26.6917812 2059-Jun-09 03:00 0.665403984964 -26.6301162 2059-Jun-09 06:00 0.663483680134 -26.5674946 2059-Jun-09 09:00 0.661567931990 -26.5039051 2059-Jun-09 12:00 0.659656810811 -26.4393364 2059-Jun-09 15:00 0.657750387701 -26.3737770 2059-Jun-09 18:00 0.655848734594 -26.3072154 2059-Jun-09 21:00 0.653951924257 -26.2396400 2059-Jun-10 00:00 0.652060030301 -26.1710391 2059-Jun-10 03:00 0.650173127181 -26.1014009 2059-Jun-10 06:00 0.648291290208 -26.0307135 2059-Jun-10 09:00 0.646414595548 -25.9589651 2059-Jun-10 12:00 0.644543120232 -25.8861437 2059-Jun-10 15:00 0.642676942159 -25.8122371 2059-Jun-10 18:00 0.640816140101 -25.7372332 2059-Jun-10 21:00 0.638960793710 -25.6611199 2059-Jun-11 00:00 0.637110983519 -25.5838848 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90000342' QUANTITIES = '19' START_TIME = '2059-Jun-05' STEP_SIZE = '3 hours' STOP_TIME = '2059-Jun-11'