Ephemeris Generator Ephemeris Settings Target Body: Comet 22P/Kopff = (1983 XIII) [1983.58] Observer Location: Geocentric [Code=500] From: A.D. 1983-07-18 21:23 UT To: A.D. 1983-07-18 22:44 Step: 5 minute Format: Calendar Date and Time Output Quantities: 2-3,9,19-20,23-24 Ref. Frame, RA/Dec Format: J2000, HMS Apparent Coordinates Model: Airless ------------------------------------------------------------------------------------------------------------------------------------------------- HORIZONS Generated Ephemeris ******************************************************************************* Ephemeris / WWW_USER Sun Jul 25 21:06:03 1999 Pasadena, USA / JPL-Horizons ******************************************************************************* Target body name: Kopff {source: JPL#44-DASTCOM3} Center body name: Earth (399) {source: DE-0406LE-0406} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1983-Jul-18 21:23:00.0000 UT Stop time : A.D. 1983-Jul-18 22:44:00.0000 UT Step-size : 5 minutes ******************************************************************************* Center geodetic : 0.000000, 0.000000, 0.00000 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.00000, 0.000, 0.000 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : Standard Earth Model {East-longitude +} Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator, meridian, pole} Target pole/equ : No model available Target radii : (unavailable) Target primary : Sun {source: DE-0406LE-0406} Interfering body: MOON (Req= 1737.400) km {source: DE-0406LE-0406} Deflecting body : Sun, EARTH {source: DE-0406LE-0406} Deflecting GMs : 1.3271E+11, 3.9860E+05 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Units conversion: 1 AU= 149597870.691 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs : Elevation (-90deg=NO ), Airmass (>38.0000=NO), Daylight (NO ) ******************************************************************************* Initial heliocentric osc. elements wrt ecliptic and mean equinox of J2000.0: EPOCH= 2445560.5 != 1983-Aug-14.0000000 (TDB) EC= .544519584 QR= 1.576344178 TP= 2445556.7996323 OM= 120.9241101 W= 162.8929427 IN= 4.7212254 Comet physical & dynamic parameters: GM= n.a. RAD= n.a. A1= -1.03E-9 A2= -9.41D-10 M1= 3. M2= 13.5 k1= 26. k2= 10. PHCOF= n.a. ************************************************************************************************************************************************* Date__(UT)__HR:MN R.A.__(a-apparent)__DEC dRA*cosD d(DEC)/dt T-mag N-mag r rdot delta deldot S-O-T S-T-O ************************************************************************************************************************************************* 1983-Jul-18 21:23 15 42 10.52 -14 46 55.1 44.27 -27.62 7.80 15.06 1.5924975261 -2.47827 0.8106273453 7.03619 120.9074 33.1937 1983-Jul-18 21:28 15 42 10.77 -14 46 57.4 44.28 -27.62 7.80 15.06 1.5924925624 -2.47790 0.8106414559 7.03665 120.9052 33.1947 1983-Jul-18 21:33 15 42 11.02 -14 46 59.7 44.28 -27.62 7.80 15.06 1.5924875995 -2.47752 0.8106555676 7.03712 120.9031 33.1956 1983-Jul-18 21:38 15 42 11.28 -14 47 02.0 44.29 -27.62 7.80 15.06 1.5924826373 -2.47715 0.8106696803 7.03759 120.9010 33.1965 1983-Jul-18 21:43 15 42 11.53 -14 47 04.3 44.29 -27.62 7.80 15.06 1.5924776758 -2.47678 0.8106837938 7.03806 120.8988 33.1975 1983-Jul-18 21:48 15 42 11.79 -14 47 06.6 44.30 -27.62 7.80 15.07 1.5924727151 -2.47641 0.8106979083 7.03852 120.8967 33.1984 1983-Jul-18 21:53 15 42 12.04 -14 47 08.9 44.30 -27.62 7.80 15.07 1.5924677552 -2.47604 0.8107120238 7.03899 120.8946 33.1994 1983-Jul-18 21:58 15 42 12.30 -14 47 11.2 44.31 -27.62 7.80 15.07 1.5924627960 -2.47567 0.8107261401 7.03946 120.8924 33.2003 1983-Jul-18 22:03 15 42 12.55 -14 47 13.5 44.31 -27.63 7.80 15.07 1.5924578375 -2.47530 0.8107402575 7.03993 120.8903 33.2013 1983-Jul-18 22:08 15 42 12.81 -14 47 15.8 44.32 -27.63 7.80 15.07 1.5924528798 -2.47493 0.8107543757 7.04040 120.8882 33.2022 1983-Jul-18 22:13 15 42 13.06 -14 47 18.1 44.32 -27.63 7.80 15.07 1.5924479228 -2.47456 0.8107684949 7.04086 120.8860 33.2032 1983-Jul-18 22:18 15 42 13.32 -14 47 20.4 44.33 -27.63 7.80 15.07 1.5924429666 -2.47419 0.8107826150 7.04133 120.8839 33.2041 1983-Jul-18 22:23 15 42 13.57 -14 47 22.7 44.33 -27.63 7.80 15.07 1.5924380111 -2.47381 0.8107967361 7.04180 120.8817 33.2050 1983-Jul-18 22:28 15 42 13.83 -14 47 25.0 44.34 -27.63 7.80 15.07 1.5924330564 -2.47344 0.8108108581 7.04227 120.8796 33.2060 1983-Jul-18 22:33 15 42 14.08 -14 47 27.3 44.34 -27.63 7.80 15.07 1.5924281024 -2.47307 0.8108249810 7.04273 120.8775 33.2069 1983-Jul-18 22:38 15 42 14.33 -14 47 29.6 44.35 -27.63 7.80 15.07 1.5924231491 -2.47270 0.8108391049 7.04320 120.8753 33.2079 1983-Jul-18 22:43 15 42 14.59 -14 47 31.9 44.35 -27.63 7.80 15.07 1.5924181966 -2.47233 0.8108532297 7.04367 120.8732 33.2088 ************************************************************************************************************************************************* Column meaning: TIME Prior to 1972, times are UT1. Dates thereafter are UTC. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. Calendar dates prior to 1582-Oct-15 are in the Julian calendar system. Later calendar dates are in the Gregorian system. The TDB uniform time scale is used internally. Conversion between TDB and the selected non-uniform UT output scale has not been determined for UTC times after the next July or January 1st. The last known leap-second is used over any future interval. NOTE: "n.a." in output means quantity "not available" at the print-time. R.A._(a-apparent)__DEC. = Airless apparent right ascension and declination of the target with respect to the Earth true-equator and the meridian containing the Earth true equinox of date. Corrected for light-time, gravitational deflection of light, stellar aberration, precession & nutation. Units:HMS (HH MM SS.ff) and DMS (DD MM SS.f) dRA*cosD d(DEC)/dt = The rate of change of target apparent RA and DEC (airless). d(RA)/dt is multiplied by the cosine of the declination. Units: ARCSECONDS PER HOUR T-mag N-mag = Comet's approximate apparent visual total magnitude ("T-mag") and nuclear magnitude ("N-mag") by following definitions: T-mag = M1 + 5*log10(delta) + k1*log10(r) N-mag = M2 + 5*log10(delta) + k2*log10(r) + phcof*beta Units: none r rdot = Target apparent heliocentric range ("r") and range-rate ("rdot") as seen by observer. Units: AU and KM/S delta deldot = Target apparent range ("delta") and range-rate ("delta-dot") relative to observer. Units: AU and KM/S S-O-T = Sun-Observer-Target angle; target's apparent solar elongation seen from observer location at print-time. If negative, the target center is behind the Sun. Units: DEGREES S-T-O = Sun-Target-Observer angle; target's apparent PHASE ANGLE as seen at observer's location at print time. Units: DEGREES Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA information: http://ssd.jpl.nasa.gov/ connect : telnet ssd.jpl.nasa.gov 6775 e-mail : horizons@ssd.jpl.nasa.gov ************************************************************************************************************************************************* ------------------------------------------------------------------------------------------------------------------------------------------------- Credits/Awards Contact: Webmaster (webmaster@ssd.jpl.nasa.gov) Last modified: 1999 June 30 13:42