Ephemeris Generator Ephemeris Settings Target Body: Comet 9P/Tempel 1 [1983] Observer Location: Geocentric [Code=500] From: A.D. 1983-07-19 00:00 UT To: A.D. 1983-07-29 00:00 Step: 12 hour 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 Apr 5 12:08:30 2000 Pasadena, USA / JPL-Horizons ******************************************************************************* Target body name: 9P/Tempel 1 {source: JPL#24-DASTCOM3} Center body name: Earth (399) {source: DE-0406LE-0406} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1983-Jul-19 00:00:00.0000 UT Stop time : A.D. 1983-Jul-29 00:00:00.0000 UT Step-size : 720 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 : 3.1 km 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= 2445520.5 != 1983-Jul-05.0000000 (TDB) EC= .520897677 QR= 1.491117218 TP= 2445525.2973512 OM= 68.99388089999999 W= 179.0752251 IN= 10.5570834 Comet physical & dynamic parameters: GM= n.a. RAD= 3.1 A1= 9.6D-11 A2= 1.8D-11 M1= 5.5 M2= 13.5 k1= 25. 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-19 00:00 13 54 24.73 -13 14 19.8 82.46 -58.48 9.86 15.25 1.4940453059 1.09760 1.0026778911 10.06398 95.4685 42.6133 1983-Jul-19 12:00 13 55 32.68 -13 26 00.7 82.83 -58.34 9.87 15.26 1.4943716999 1.15701 1.0055926194 10.12207 95.3175 42.6130 1983-Jul-20 00:00 13 56 40.98 -13 37 39.9 83.19 -58.19 9.88 15.26 1.4947152402 1.21636 1.0085241708 10.18048 95.1674 42.6117 1983-Jul-20 12:00 13 57 49.64 -13 49 17.3 83.55 -58.04 9.89 15.27 1.4950759073 1.27563 1.0114726414 10.23924 95.0182 42.6092 1983-Jul-21 00:00 13 58 58.66 -14 00 52.8 83.91 -57.88 9.90 15.28 1.4954536810 1.33484 1.0144381296 10.29833 94.8698 42.6057 1983-Jul-21 12:00 14 00 08.02 -14 12 26.5 84.26 -57.72 9.91 15.29 1.4958485398 1.39397 1.0174207355 10.35778 94.7223 42.6011 1983-Jul-22 00:00 14 01 17.73 -14 23 58.2 84.61 -57.56 9.92 15.29 1.4962604614 1.45302 1.0204205614 10.41758 94.5755 42.5954 1983-Jul-22 12:00 14 02 27.79 -14 35 27.9 84.96 -57.39 9.93 15.30 1.4966894228 1.51199 1.0234377105 10.47775 94.4296 42.5887 1983-Jul-23 00:00 14 03 38.19 -14 46 55.6 85.30 -57.22 9.94 15.31 1.4971353996 1.57088 1.0264722871 10.53827 94.2845 42.5810 1983-Jul-23 12:00 14 04 48.94 -14 58 21.2 85.63 -57.04 9.95 15.32 1.4975983670 1.62967 1.0295243967 10.59917 94.1401 42.5722 1983-Jul-24 00:00 14 06 00.02 -15 09 44.7 85.96 -56.86 9.96 15.32 1.4980782989 1.68838 1.0325941447 10.66042 93.9965 42.5625 1983-Jul-24 12:00 14 07 11.44 -15 21 05.9 86.29 -56.68 9.97 15.33 1.4985751685 1.74699 1.0356816372 10.72205 93.8536 42.5517 1983-Jul-25 00:00 14 08 23.19 -15 32 25.0 86.62 -56.49 9.98 15.34 1.4990889479 1.80550 1.0387869803 10.78404 93.7114 42.5399 1983-Jul-25 12:00 14 09 35.28 -15 43 41.8 86.94 -56.30 9.99 15.35 1.4996196085 1.86391 1.0419102795 10.84640 93.5699 42.5272 1983-Jul-26 00:00 14 10 47.70 -15 54 56.2 87.25 -56.10 10.00 15.36 1.5001671207 1.92222 1.0450516400 10.90912 93.4290 42.5134 1983-Jul-26 12:00 14 12 00.45 -16 06 08.3 87.57 -55.91 10.01 15.37 1.5007314541 1.98042 1.0482111665 10.97220 93.2889 42.4987 1983-Jul-27 00:00 14 13 13.53 -16 17 18.0 87.88 -55.70 10.02 15.37 1.5013125773 2.03851 1.0513889625 11.03564 93.1494 42.4830 1983-Jul-27 12:00 14 14 26.93 -16 28 25.3 88.19 -55.50 10.03 15.38 1.5019104580 2.09649 1.0545851305 11.09943 93.0105 42.4664 1983-Jul-28 00:00 14 15 40.65 -16 39 30.0 88.49 -55.29 10.04 15.39 1.5025250633 2.15435 1.0577997716 11.16357 92.8722 42.4488 1983-Jul-28 12:00 14 16 54.70 -16 50 32.2 88.79 -55.07 10.05 15.40 1.5031563592 2.21210 1.0610329855 11.22805 92.7346 42.4303 1983-Jul-29 00:00 14 18 09.07 -17 01 31.8 89.08 -54.86 10.07 15.41 1.5038043108 2.26972 1.0642848702 11.29287 92.5975 42.4109 ************************************************************************************************************************************************* 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: 2000 March 13 08:35