Ephemeris Generator Ephemeris Settings Target Body: Comet 38P/Stephan-Oterma = (1980 X) [1980.83] Observer Location: Geocentric [Code=500] From: A.D. 1980-10-24 00:00 UT To: A.D. 1980-12-07 00:00 Step: 2 day 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 Wed Jul 14 15:19:05 1999 Pasadena, USA / JPL-Horizons ******************************************************************************* Target body name: Stephan-Oterma {source: JPL#02-DASTCOM3} Center body name: Earth (399) {source: DE-0406LE-0406} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1980-Oct-24 00:00:00.0000 UT Stop time : A.D. 1980-Dec-07 00:00:00.0000 UT Step-size : 2880 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= 2444560.5 != 1980-Nov-17.0000000 (TDB) EC= .859997589 QR= 1.574356312 TP= 2444578.664728 OM= 79.1906508 W= 358.1813595 IN= 17.9816987 Comet physical & dynamic parameters: GM= n.a. RAD= n.a. A1= 1.68E-9 A2= -3.2D-11 M1= 8. M2= 13. k1= 15. 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 ************************************************************************************************************************************************* 1980-Oct-24 00:00 05 07 23.32 +04 58 13.9 43.50 32.98 10.89 14.79 1.6622038802 -6.95251 0.8243525908 -15.53402 131.8619 26.4648 1980-Oct-26 00:00 05 09 40.49 +05 25 28.1 41.83 35.14 10.81 14.72 1.6543405796 -6.66710 0.8066821133 -15.05907 133.2127 25.9730 1980-Oct-28 00:00 05 11 52.26 +05 54 29.2 40.07 37.43 10.74 14.65 1.6468103571 -6.37593 0.7895668368 -14.57231 134.6007 25.4410 1980-Oct-30 00:00 05 13 58.35 +06 25 22.5 38.23 39.82 10.66 14.59 1.6396197942 -6.07912 0.7730217740 -14.07147 136.0282 24.8670 1980-Nov-01 00:00 05 15 58.48 +06 58 13.4 36.31 42.32 10.59 14.52 1.6327753058 -5.77684 0.7570642159 -13.55488 137.4972 24.2493 1980-Nov-03 00:00 05 17 52.44 +07 33 06.9 34.32 44.93 10.52 14.46 1.6262831193 -5.46926 0.7417130366 -13.02142 139.0094 23.5863 1980-Nov-05 00:00 05 19 40.04 +08 10 07.7 32.27 47.63 10.45 14.40 1.6201492527 -5.15656 0.7269882542 -12.47021 140.5662 22.8766 1980-Nov-07 00:00 05 21 21.10 +08 49 19.8 30.18 50.40 10.39 14.35 1.6143794940 -4.83895 0.7129107741 -11.90058 142.1690 22.1190 1980-Nov-09 00:00 05 22 55.51 +09 30 46.8 28.05 53.24 10.32 14.29 1.6089793797 -4.51666 0.6995021507 -11.31210 143.8186 21.3128 1980-Nov-11 00:00 05 24 23.19 +10 14 31.1 25.90 56.12 10.26 14.24 1.6039541743 -4.18994 0.6867842939 -10.70459 145.5157 20.4573 1980-Nov-13 00:00 05 25 44.07 +11 00 34.3 23.75 59.02 10.20 14.19 1.5993088493 -3.85904 0.6747791348 -10.07818 147.2603 19.5525 1980-Nov-15 00:00 05 26 58.15 +11 48 56.7 21.61 61.91 10.15 14.14 1.5950480643 -3.52425 0.6635082865 -9.43329 149.0522 18.5986 1980-Nov-17 00:00 05 28 05.45 +12 39 37.2 19.48 64.77 10.10 14.09 1.5911761474 -3.18586 0.6529927298 -8.77059 150.8907 17.5963 1980-Nov-19 00:00 05 29 06.03 +13 32 33.1 17.39 67.55 10.05 14.05 1.5876970773 -2.84417 0.6432526094 -8.09081 152.7746 16.5469 1980-Nov-21 00:00 05 29 59.99 +14 27 40.2 15.32 70.23 10.01 14.01 1.5846144664 -2.49952 0.6343073953 -7.39428 154.7021 15.4520 1980-Nov-23 00:00 05 30 47.41 +15 24 52.6 13.30 72.77 9.97 13.98 1.5819315453 -2.15224 0.6261766393 -6.68049 156.6711 14.3137 1980-Nov-25 00:00 05 31 28.41 +16 24 02.9 11.32 75.13 9.94 13.94 1.5796511487 -1.80267 0.6188809062 -5.94833 158.6787 13.1350 1980-Nov-27 00:00 05 32 03.13 +17 25 01.6 9.42 77.28 9.91 13.92 1.5777757024 -1.45119 0.6124419034 -5.19709 160.7205 11.9194 1980-Nov-29 00:00 05 32 31.80 +18 27 37.6 7.62 79.18 9.88 13.89 1.5763072127 -1.09814 0.6068815805 -4.42710 162.7909 10.6721 1980-Dec-01 00:00 05 32 54.75 +19 31 38.0 5.95 80.79 9.86 13.87 1.5752472573 -0.74392 0.6022209562 -3.63960 164.8816 9.3997 1980-Dec-03 00:00 05 33 12.43 +20 36 48.2 4.44 82.08 9.84 13.86 1.5745969776 -0.38889 0.5984792425 -2.83642 166.9806 8.1112 1980-Dec-05 00:00 05 33 25.35 +21 42 52.3 3.11 83.03 9.83 13.85 1.5743570742 -0.03344 0.5956732633 -2.01985 169.0698 6.8202 1980-Dec-07 00:00 05 33 34.13 +22 49 33.2 1.99 83.61 9.83 13.84 1.5745278029 0.32203 0.5938169748 -1.19258 171.1174 5.5485 ************************************************************************************************************************************************* 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 ************************************************************************************************************************************************* ------------------------------------------------------------------------ [JPL/SSD Home] Credits/Awards Contact: Webmaster (webmaster@ssd.jpl.nasa.gov) Last modified: 1999 June 30 13:42