Ephemeris Generator Ephemeris Settings Target Body: Comet 109P/Swift-Tuttle = (1992 XXVIII) [1992.92] Observer Location: Geocentric [Code=500] From: A.D. 1992-11-03 00:00 UT To: A.D. 1992-11-23 00:00 Step: 1 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 15:29:29 1999 Pasadena, USA / JPL-Horizons ******************************************************************************* Target body name: Swift-Tuttle {source: JPL#23-DASTCOM3} Center body name: Earth (399) {source: DE-0406LE-0406} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 1992-Nov-03 00:00:00.0000 UT Stop time : A.D. 1992-Nov-23 00:00:00.0000 UT Step-size : 1440 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 : 15.6 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= 2448960.5 != 1992-Dec-04.0000000 (TDB) EC= .963589253 QR= .958217069 TP= 2448968.8240133 OM= 139.4443659 W= 153.001454 IN= 113.4266448 Comet physical & dynamic parameters: GM= n.a. RAD= 15.6 A1= n.a. A2= n.a. M1= 4.5 M2= 8.5 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 ************************************************************************************************************************************************* 1992-Nov-03 00:00 16 50 38.12 +41 03 51.4 196.35 -191.97 5.86 9.52 1.1667134195 -16.15294 1.1757747494 -7.66359 64.4749 50.1028 1992-Nov-04 00:00 16 57 28.75 +39 46 08.8 194.36 -196.46 5.80 9.48 1.1574538860 -15.91809 1.1718191209 -6.04416 64.0545 50.3903 1992-Nov-05 00:00 17 04 07.31 +38 26 44.4 192.16 -200.45 5.74 9.44 1.1483325940 -15.67451 1.1688022944 -4.41355 63.6044 50.6543 1992-Nov-06 00:00 17 10 33.93 +37 05 50.5 189.78 -203.92 5.68 9.40 1.1393546425 -15.42200 1.1667292246 -2.77694 63.1254 50.8933 1992-Nov-07 00:00 17 16 48.77 +35 43 39.6 187.24 -206.87 5.63 9.37 1.1305252392 -15.16038 1.1656018388 -1.13964 62.6185 51.1054 1992-Nov-08 00:00 17 22 52.06 +34 20 24.4 184.54 -209.28 5.58 9.33 1.1218496958 -14.88947 1.1654189794 0.49299 62.0847 51.2891 1992-Nov-09 00:00 17 28 44.03 +32 56 17.8 181.71 -211.16 5.53 9.30 1.1133334232 -14.60910 1.1661763815 2.11557 61.5252 51.4428 1992-Nov-10 00:00 17 34 24.97 +31 31 32.2 178.75 -212.53 5.49 9.27 1.1049819257 -14.31913 1.1678666859 3.72277 60.9411 51.5650 1992-Nov-11 00:00 17 39 55.18 +30 06 20.1 175.69 -213.38 5.44 9.24 1.0968007947 -14.01940 1.1704794860 5.30938 60.3337 51.6543 1992-Nov-12 00:00 17 45 14.96 +28 40 53.6 172.54 -213.73 5.40 9.22 1.0887957004 -13.70978 1.1740014072 6.87033 59.7042 51.7093 1992-Nov-13 00:00 17 50 24.64 +27 15 24.3 169.32 -213.62 5.36 9.19 1.0809723841 -13.39016 1.1784162158 8.40079 59.0541 51.7290 1992-Nov-14 00:00 17 55 24.57 +25 50 03.2 166.04 -213.05 5.33 9.17 1.0733366483 -13.06044 1.1837049557 9.89618 58.3845 51.7122 1992-Nov-15 00:00 18 00 15.07 +24 25 00.9 162.71 -212.06 5.29 9.15 1.0658943466 -12.72055 1.1898461110 11.35222 57.6968 51.6581 1992-Nov-16 00:00 18 04 56.48 +23 00 27.0 159.35 -210.68 5.26 9.14 1.0586513717 -12.37041 1.1968157899 12.76496 56.9922 51.5660 1992-Nov-17 00:00 18 09 29.15 +21 36 30.8 155.97 -208.93 5.23 9.12 1.0516136435 -12.01001 1.2045879301 14.13083 56.2720 51.4353 1992-Nov-18 00:00 18 13 53.41 +20 13 20.4 152.58 -206.86 5.20 9.11 1.0447870951 -11.63932 1.2131345182 15.44665 55.5374 51.2655 1992-Nov-19 00:00 18 18 09.57 +18 51 03.5 149.20 -204.49 5.18 9.10 1.0381776583 -11.25837 1.2224258221 16.70965 54.7896 51.0564 1992-Nov-20 00:00 18 22 17.98 +17 29 46.6 145.83 -201.86 5.16 9.09 1.0317912482 -10.86719 1.2324306316 17.91748 54.0296 50.8080 1992-Nov-21 00:00 18 26 18.93 +16 09 35.7 142.48 -199.00 5.14 9.08 1.0256337463 -10.46586 1.2431165027 19.06822 53.2585 50.5204 1992-Nov-22 00:00 18 30 12.74 +14 50 35.9 139.16 -195.95 5.12 9.08 1.0197109834 -10.05448 1.2544500027 20.16035 52.4773 50.1937 1992-Nov-23 00:00 18 33 59.70 +13 32 51.4 135.88 -192.73 5.10 9.07 1.0140287206 -9.63319 1.2663969518 21.19279 51.6870 49.8285 ************************************************************************************************************************************************* 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