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 20:43 UT To: A.D. 1992-11-23 08:40 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 Sun Jul 25 08:28:52 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 20:43:00.0000 UT Stop time : A.D. 1992-Nov-23 08:40:00.0000 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 : 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 20:43 16 56 33.29 +39 56 53.0 194.64 -195.88 5.80 9.48 1.1587125920 -15.95073 1.1723049879 -6.26648 64.1138 50.3523 1992-Nov-04 08:43 16 59 54.89 +39 17 29.6 193.58 -197.97 5.78 9.46 1.1541248313 -15.83064 1.1706145367 -5.45295 63.8944 50.4890 1992-Nov-04 20:43 17 03 13.49 +38 37 41.8 192.47 -199.94 5.75 9.44 1.1495720891 -15.70835 1.1691593687 -4.63710 63.6677 50.6197 1992-Nov-05 08:43 17 06 29.10 +37 57 31.2 191.32 -201.77 5.72 9.43 1.1450550043 -15.58384 1.1679400618 -3.81956 63.4337 50.7441 1992-Nov-05 20:43 17 09 41.74 +37 16 59.4 190.12 -203.48 5.69 9.41 1.1405742227 -15.45708 1.1669570054 -3.00100 63.1926 50.8621 1992-Nov-06 08:43 17 12 51.42 +36 36 07.8 188.88 -205.05 5.67 9.39 1.1361303969 -15.32804 1.1662103975 -2.18208 62.9445 50.9735 1992-Nov-06 20:43 17 15 58.18 +35 54 58.2 187.60 -206.50 5.64 9.37 1.1317241859 -15.19671 1.1657002437 -1.36348 62.6895 51.0780 1992-Nov-07 08:43 17 19 02.04 +35 13 32.1 186.28 -207.80 5.61 9.35 1.1273562551 -15.06307 1.1654263555 -0.54585 62.4277 51.1755 1992-Nov-07 20:43 17 22 03.03 +34 31 51.1 184.92 -208.98 5.59 9.34 1.1230272762 -14.92708 1.1653883501 0.27011 62.1593 51.2657 1992-Nov-08 08:43 17 25 01.19 +33 49 56.8 183.53 -210.03 5.56 9.32 1.1187379272 -14.78874 1.1655856503 1.08375 61.8844 51.3485 1992-Nov-08 20:43 17 27 56.54 +33 07 50.7 182.10 -210.94 5.54 9.30 1.1144888915 -14.64802 1.1660174849 1.89438 61.6032 51.4236 1992-Nov-09 08:43 17 30 49.12 +32 25 34.5 180.65 -211.72 5.52 9.29 1.1102808587 -14.50491 1.1666828899 2.70135 61.3158 51.4909 1992-Nov-09 20:43 17 33 38.97 +31 43 09.8 179.16 -212.37 5.49 9.27 1.1061145237 -14.35937 1.1675807100 3.50400 61.0224 51.5502 1992-Nov-10 08:43 17 36 26.13 +31 00 37.9 177.65 -212.89 5.47 9.26 1.1019905865 -14.21140 1.1687096010 4.30167 60.7231 51.6013 1992-Nov-10 20:43 17 39 10.63 +30 18 00.6 176.12 -213.29 5.45 9.25 1.0979097524 -14.06098 1.1700680319 5.09372 60.4181 51.6440 1992-Nov-11 08:43 17 41 52.51 +29 35 19.2 174.56 -213.56 5.43 9.23 1.0938727314 -13.90810 1.1716542884 5.87953 60.1076 51.6783 1992-Nov-11 20:43 17 44 31.81 +28 52 35.4 172.98 -213.71 5.41 9.22 1.0898802378 -13.75273 1.1734664761 6.65848 59.7916 51.7038 1992-Nov-12 08:43 17 47 08.58 +28 09 50.4 171.38 -213.74 5.39 9.21 1.0859329905 -13.59486 1.1755025249 7.42996 59.4704 51.7206 1992-Nov-12 20:43 17 49 42.86 +27 27 05.8 169.76 -213.66 5.37 9.20 1.0820317119 -13.43448 1.1777601927 8.19339 59.1442 51.7284 1992-Nov-13 08:43 17 52 14.69 +26 44 22.8 168.13 -213.46 5.35 9.19 1.0781771285 -13.27158 1.1802370708 8.94820 58.8131 51.7272 1992-Nov-13 20:43 17 54 44.10 +26 01 42.9 166.49 -213.15 5.33 9.18 1.0743699695 -13.10615 1.1829305889 9.69383 58.4772 51.7167 1992-Nov-14 08:43 17 57 11.15 +25 19 07.4 164.83 -212.74 5.31 9.17 1.0706109676 -12.93818 1.1858380205 10.42977 58.1367 51.6969 1992-Nov-14 20:43 17 59 35.87 +24 36 37.4 163.17 -212.22 5.30 9.16 1.0669008578 -12.76765 1.1889564886 11.15549 57.7919 51.6678 1992-Nov-15 08:43 18 01 58.31 +23 54 14.3 161.49 -211.60 5.28 9.15 1.0632403771 -12.59457 1.1922829724 11.87052 57.4427 51.6291 1992-Nov-15 20:43 18 04 18.51 +23 11 59.1 159.81 -210.89 5.27 9.14 1.0596302648 -12.41892 1.1958143134 12.57438 57.0895 51.5809 1992-Nov-16 08:43 18 06 36.51 +22 29 53.1 158.12 -210.08 5.25 9.13 1.0560712611 -12.24071 1.1995472222 13.26663 56.7324 51.5230 1992-Nov-16 20:43 18 08 52.35 +21 47 57.2 156.43 -209.19 5.24 9.12 1.0525641075 -12.05992 1.2034782852 13.94686 56.3714 51.4555 1992-Nov-17 08:43 18 11 06.08 +21 06 12.6 154.74 -208.22 5.22 9.12 1.0491095459 -11.87657 1.2076039724 14.61467 56.0068 51.3781 1992-Nov-17 20:43 18 13 17.74 +20 24 40.2 153.05 -207.16 5.21 9.11 1.0457083181 -11.69064 1.2119206441 15.26970 55.6387 51.2910 1992-Nov-18 08:43 18 15 27.36 +19 43 20.8 151.35 -206.03 5.20 9.11 1.0423611658 -11.50215 1.2164245583 15.91161 55.2673 51.1941 1992-Nov-18 20:43 18 17 34.99 +19 02 15.5 149.66 -204.83 5.18 9.10 1.0390688294 -11.31109 1.2211118790 16.54008 54.8926 51.0873 1992-Nov-19 08:43 18 19 40.67 +18 21 24.9 147.97 -203.57 5.17 9.10 1.0358320484 -11.11747 1.2259786829 17.15482 54.5149 50.9708 1992-Nov-19 20:43 18 21 44.44 +17 40 50.0 146.29 -202.24 5.16 9.09 1.0326515598 -10.92131 1.2310209676 17.75558 54.1342 50.8443 1992-Nov-20 08:43 18 23 46.34 +17 00 31.4 144.61 -200.85 5.15 9.09 1.0295280986 -10.72260 1.2362346592 18.34211 53.7508 50.7081 1992-Nov-20 20:43 18 25 46.40 +16 20 29.8 142.94 -199.41 5.14 9.08 1.0264623965 -10.52136 1.2416156201 18.91422 53.3646 50.5620 1992-Nov-21 08:43 18 27 44.66 +15 40 45.8 141.27 -197.92 5.13 9.08 1.0234551816 -10.31760 1.2471596561 19.47172 52.9759 50.4062 1992-Nov-21 20:43 18 29 41.16 +15 01 19.9 139.61 -196.38 5.12 9.08 1.0205071780 -10.11135 1.2528625248 20.01444 52.5848 50.2407 1992-Nov-22 08:43 18 31 35.95 +14 22 12.9 137.97 -194.80 5.11 9.08 1.0176191050 -9.90261 1.2587199421 20.54227 52.1913 50.0655 1992-Nov-22 20:43 18 33 29.04 +13 43 25.0 136.33 -193.18 5.11 9.07 1.0147916764 -9.69140 1.2647275900 21.05510 51.7956 49.8807 ************************************************************************************************************************************************* 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