******************************************************************************* JPL/HORIZONS Bowell (C/1980 E1) 2024-Apr-27 00:20:32 Rec #:90002061 (+COV) Soln.date: 2021-Apr-15_23:29:29 # obs: 187 (1980-1986) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2444972.5 ! 1982-Jan-03.0000000 (TDB) RMSW= n.a. EC= 1.057732866190401 QR= 3.363939864961739 TP= 2445040.7868834003 OM= 114.557492007681 W= 135.0832940391088 IN= 1.661741742960259 A= -58.26732824709546 MA= -.1513225701277234 ADIST= 9.999999E99 PER= 9.999999E99 N= .002215983 ANGMOM= .045258489 DAN= 27.57987 DDN= 3.9577 L= 249.6528365 B= 1.1732369 MOID= 2.3505199 TP= 1982-Mar-12.2868834003 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.8 M2= n.a. k1= 7.25 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#6, data arc: 1980-02-11 to 1986-12-30 2: k1=7.25; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat Apr 27 00:20:33 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Bowell (C/1980 E1) {source: JPL#6} Center body name: Sun (10) {source: DE441} Center-site name: BODYCENTRIC ******************************************************************************* Start time : A.D. 1764-Dec-15 00:00:00.0000 UT Stop time : A.D. 1765-Feb-01 00:00:00.0000 UT Step-size : 30 steps ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -695700.0 {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 : IAU_SUN {East-longitude positive} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : None 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.240426.p240720 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-26. PREDICTS-> 2024-JUL-19 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 n.a. , 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= 2444972.5 ! 1982-Jan-03.0000000 (TDB) RMSW= n.a. EC= 1.057732866190401 QR= 3.363939864961739 TP= 2445040.7868834003 OM= 114.557492007681 W= 135.0832940391088 IN= 1.661741742960259 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-2.004473392124170E+00 Y=-2.584125203604185E+00 Z=-1.026185222701464E+00 VX= 1.178274458095755E-02 VY=-5.625054774058823E-03 VZ=-2.695717907192531E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5.8 M2= n.a. k1= 7.25 k2= n.a. PHCOF= n.a. ********************************************************************************** Date__(UT)__HR:MN:SC.fff r rdot VmagSn VmagOb ********************************************************************************** $$SOE 1764-Dec-15 00:00:00.000 200.0533715290 -2.9539093 2.9794847 2.9795303 1764-Dec-16 14:24:00.000 200.0506418372 -2.9539620 2.9795361 2.9795814 1764-Dec-18 04:48:00.000 200.0479120967 -2.9540146 2.9795878 2.9796328 1764-Dec-19 19:12:00.000 200.0451823077 -2.9540670 2.9796394 2.9796841 1764-Dec-21 09:36:00.000 200.0424524704 -2.9541192 2.9796907 2.9797351 1764-Dec-23 00:00:00.000 200.0397225849 -2.9541712 2.9797418 2.9797860 1764-Dec-24 14:24:00.000 200.0369926514 -2.9542230 2.9797928 2.9798367 1764-Dec-26 04:48:00.000 200.0342626702 -2.9542747 2.9798435 2.9798871 1764-Dec-27 19:12:00.000 200.0315326413 -2.9543261 2.9798941 2.9799374 1764-Dec-29 09:36:00.000 200.0288025649 -2.9543774 2.9799445 2.9799876 1764-Dec-31 00:00:00.000 200.0260724411 -2.9544286 2.9799947 2.9800375 1765-Jan-01 14:24:00.000 200.0233422702 -2.9544796 2.9800447 2.9800873 1765-Jan-03 04:48:00.000 200.0206120521 -2.9545305 2.9800946 2.9801370 1765-Jan-04 19:12:00.000 200.0178817872 -2.9545812 2.9801444 2.9801866 1765-Jan-06 09:36:00.000 200.0151514753 -2.9546319 2.9801940 2.9802361 1765-Jan-08 00:00:00.000 200.0124211166 -2.9546826 2.9802435 2.9802855 1765-Jan-09 14:24:00.000 200.0096907112 -2.9547331 2.9802930 2.9803349 1765-Jan-11 04:48:00.000 200.0069602591 -2.9547837 2.9803424 2.9803842 1765-Jan-12 19:12:00.000 200.0042297602 -2.9548342 2.9803917 2.9804336 1765-Jan-14 09:36:00.000 200.0014992147 -2.9548847 2.9804411 2.9804829 1765-Jan-16 00:00:00.000 199.9987686224 -2.9549353 2.9804904 2.9805321 1765-Jan-17 14:24:00.000 199.9960379835 -2.9549857 2.9805396 2.9805813 1765-Jan-19 04:48:00.000 199.9933072980 -2.9550361 2.9805889 2.9806304 1765-Jan-20 19:12:00.000 199.9905765660 -2.9550864 2.9806380 2.9806793 1765-Jan-22 09:36:00.000 199.9878457876 -2.9551365 2.9806870 2.9807280 1765-Jan-24 00:00:00.000 199.9851149630 -2.9551863 2.9807358 2.9807765 1765-Jan-25 14:24:00.000 199.9823840925 -2.9552359 2.9807844 2.9808246 1765-Jan-27 04:48:00.000 199.9796531763 -2.9552852 2.9808327 2.9808724 1765-Jan-28 19:12:00.000 199.9769222147 -2.9553341 2.9808806 2.9809199 1765-Jan-30 09:36:00.000 199.9741912081 -2.9553827 2.9809283 2.9809670 1765-Feb-01 00:00:00.000 199.9714601568 -2.9554309 2.9809755 2.9810138 $$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 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: 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 = '1980 E1' START_TIME = '1764-12-15' STOP_TIME = '1765-02-01' STEP_SIZE = '30' QUANTITIES = '19,22' CENTER = '@Sun'