******************************************************************************* JPL/HORIZONS Bowell (C/1980 E1) 2024-Apr-26 02:11:31 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 Fri Apr 26 02:11:32 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Bowell (C/1980 E1) {source: JPL#6} Center body name: Solar System Barycenter (0) {source: DE441} Center-site name: BODY CENTER ******************************************************************************* Start time : A.D. 1950-Jan-01 00:00:00.0000 TDB Stop time : A.D. 2050-Jan-01 00:00:00.0000 TDB Step-size : 100 calendar years ******************************************************************************* Center geodetic : 0.0, 0.0, 0.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center radii : (undefined) Keplerian GM : 2.9630927493968080E-04 au^3/d^2 Small perturbers: Yes {source: SB441-N16} Output units : AU-D, deg, Julian Day Number (Tp) Calendar mode : Mixed Julian/Gregorian Output type : GEOMETRIC osculating elements Output format : 10 Reference frame : Ecliptic of J2000.0 ******************************************************************************* 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. ******************************************************************************* JDTDB EC QR IN OM W Tp N MA TA A AD PR ******************************************************************************* $$SOE 2433282.500000000 = A.D. 1950-Jan-01 00:00:00.0000 TDB EC= 9.999152244594530E-01 QR= 3.169408826296083E+00 IN= 1.770420148914285E+00 OM= 1.206308298683920E+02 W = 1.346026935136695E+02 Tp= 2445064.431010652333 N = 1.364374871574016E-07 MA= 3.599983925029391E+02 TA= 2.080323955184398E+02 A = 3.738588755490636E+04 AD= 7.476860570098643E+04 PR= 2.638571022527589E+09 2469807.500000000 = A.D. 2050-Jan-01 00:00:00.0000 TDB EC= 1.053745927382172E+00 QR= 3.356036281619526E+00 IN= 1.661976089534372E+00 OM= 1.145619319290376E+02 W = 1.349638340880050E+02 Tp= 2445040.237407010514 N = 1.998819721992208E-03 MA= 4.950529293062696E+01 TA= 1.523546963827594E+02 A =-6.244261556332729E+01 AD= 9.999999999999998E+99 PR= 9.999999999999998E+99 $$EOE ******************************************************************************* TIME Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This continuous coordinate time is equivalent to the relativistic proper time of a clock at rest in a reference frame co-moving with the solar system barycenter but outside the system's gravity well. It is the independent variable in the solar system relativistic equations of motion. TDB runs at a uniform rate of one SI second per second and is independent of irregularities in Earth's rotation. 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. REFERENCE FRAME AND COORDINATES Ecliptic at the standard reference epoch Reference epoch: J2000.0 X-Y plane: adopted Earth orbital plane at the reference epoch Note: IAU76 obliquity of 84381.448 arcseconds wrt ICRF X-Y plane X-axis : ICRF Z-axis : perpendicular to the X-Y plane in the directional (+ or -) sense of Earth's north pole at the reference epoch. Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]: JDTDB Julian Day Number, Barycentric Dynamical Time EC Eccentricity, e QR Periapsis distance, q (au) IN Inclination w.r.t X-Y plane, i (degrees) OM Longitude of Ascending Node, OMEGA, (degrees) W Argument of Perifocus, w (degrees) Tp Time of periapsis (Julian Day Number) N Mean motion, n (degrees/day) MA Mean anomaly, M (degrees) TA True anomaly, nu (degrees) A Semi-major axis, a (au) AD Apoapsis distance (au) PR Sidereal orbit period (day) ABERRATIONS AND CORRECTIONS Geometric osculating elements have NO corrections or aberrations applied. 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' TABLE_TYPE = 'ELEMENTS' START_TIME = '1950-01-01' STOP_TIME = '2050-01-01' STEP_SIZE = '100 years' CENTER = '@0' OUT_UNITS = 'AU-D'