Ephemeris Generator Ephemeris Settings Target Body: Comet C/NEAT (2001 Q4) [2004.25] Observer Location: Geocentric [Code=500] Coordinates: 0°00'00.0''E, 0°00'00.0''N, -6378140. m From: A.D. 2004-04-26 00:00 UT To: A.D. 2004-06-01 00:00 Step: 1 day Format: Calendar Date and Time Output Quantities: 1-2,9-10,13,20 Ref. Frame, RA/Dec Format: J2000, HMS Apparent Coordinates Model: Airless HORIZONS Generated Ephemeris ******************************************************************************* Ephemeris / WWW_USER Mon May 3 11:22:30 2004 Pasadena, USA / Horizons ******************************************************************************* Target body name: NEAT (C/2001 Q4) {source: JPL#112} Center body name: Earth (399) {source: DE-0406LE-0406} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2004-Apr-26 00:00:00.0000 UT Stop time : A.D. 2004-Jun-01 00:00:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Center geodetic : 0.000000, 0.0000, 0.0000{E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.000000, 0.0000, 0.0000{E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : High-precision EOP 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 {source: DE-0406LE-0406} Deflecting GM : 1.3271E+11 km^3/s^2 Small perturbers: Ceres, Pallas, Vesta {source: SB405-CPV-2} Small body GMs : 6.32E+01, 1.43E+01, 1.78E+01 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL EOP file : eop.040430.p040722 EOP coverage : DATA-BASED 1962-JAN-20 TO 2004-APR-30. PREDICTS-> 2004-JUL-21 Units conversion: 1 AU= 149597870.691 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar Elongation ( 0.0,180.0=NO ) ******************************************************************************* Initial FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG): EPOCH= 2453121.5 != 2004-Apr-26.0000000 (CT) RMSW= n.a. EC= 1.000522818277369 QR= .961953788274559 TP= 2453141.468440496 OM= 210.2786496345701 W= 1.207513983955535 IN= 99.64238780664814 Comet physical & dynamic parameters (KM, SEC; A1,A2,A3=AU/d^2; DT=days): GM= n.a. RAD= n.a. A1= 3.777349E-8 A2= -1.816976E-8 A3= n.a. DT= n.a. M1= 5. M2= n.a. k1= 7.5 k2= n.a. PHCOF= n.a. *************************************************************************************************************************** Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC R.A.__(a-apparent)__DEC T-mag N-mag Illu% Ang-diam delta deldot *************************************************************************************************************************** 2004-Apr-26 00:00 04 58 49.90 -57 30 43.2 04 58 52.47 -57 30 28.4 3.43 n.a. 63.2 n.a. 0.4688388715 -39.71716 2004-Apr-27 00:00 05 14 19.03 -55 36 49.5 05 14 22.15 -55 36 40.4 3.30 n.a. 62.2 n.a. 0.4463880976 -37.97554 2004-Apr-28 00:00 05 29 42.44 -53 23 35.6 05 29 46.21 -53 23 32.3 3.18 n.a. 61.1 n.a. 0.4250338222 -35.91351 2004-Apr-29 00:00 05 44 52.40 -50 49 04.2 05 44 56.88 -50 49 06.5 3.06 n.a. 60.0 n.a. 0.4049744483 -33.48465 2004-Apr-30 00:00 05 59 41.79 -47 51 31.9 05 59 47.03 -47 51 39.7 2.94 n.a. 58.9 n.a. 0.3864353349 -30.64269 2004-May-01 00:00 06 14 04.45 -44 29 43.2 06 14 10.49 -44 29 56.2 2.83 n.a. 57.8 n.a. 0.3696673462 -27.34663 2004-May-02 00:00 06 27 55.39 -40 43 07.3 06 28 02.22 -40 43 25.1 2.73 n.a. 56.8 n.a. 0.3549416969 -23.56845 2004-May-03 00:00 06 41 10.82 -36 32 17.8 06 41 18.43 -36 32 39.9 2.64 n.a. 55.8 n.a. 0.3425396621 -19.30305 2004-May-04 00:00 06 53 48.20 -31 59 11.4 06 53 56.57 -31 59 37.4 2.56 n.a. 54.8 n.a. 0.3327362210 -14.57896 2004-May-05 00:00 07 05 46.08 -27 07 19.8 07 05 55.18 -27 07 49.3 2.50 n.a. 54.0 n.a. 0.3257780245 -9.46663 2004-May-06 00:00 07 17 04.01 -22 01 48.3 07 17 13.79 -22 02 20.7 2.46 n.a. 53.3 n.a. 0.3218582374 -4.08027 2004-May-07 00:00 07 27 42.33 -16 48 55.2 07 27 52.74 -16 49 30.1 2.45 n.a. 52.8 n.a. 0.3210931078 1.43029 2004-May-08 00:00 07 37 41.99 -11 35 34.4 07 37 52.99 -11 36 11.3 2.46 n.a. 52.4 n.a. 0.3235062147 6.89768 2004-May-09 00:00 07 47 04.42 -06 28 28.3 07 47 15.95 -06 29 06.9 2.49 n.a. 52.3 n.a. 0.3290250536 12.16053 2004-May-10 00:00 07 55 51.33 -01 33 24.3 07 56 03.36 -01 34 04.1 2.53 n.a. 52.3 n.a. 0.3374910333 17.08510 2004-May-11 00:00 08 04 04.67 +03 05 14.6 08 04 17.13 +03 04 33.7 2.60 n.a. 52.5 n.a. 0.3486797937 21.57865 2004-May-12 00:00 08 11 46.44 +07 24 39.4 08 11 59.30 +07 23 57.5 2.68 n.a. 52.9 n.a. 0.3623262018 25.59229 2004-May-13 00:00 08 18 58.72 +11 23 28.9 08 19 11.92 +11 22 46.2 2.77 n.a. 53.4 n.a. 0.3781483850 29.11542 2004-May-14 00:00 08 25 43.51 +15 01 33.1 08 25 57.03 +15 00 49.6 2.86 n.a. 54.0 n.a. 0.3958670562 32.16571 2004-May-15 00:00 08 32 02.78 +18 19 33.2 08 32 16.58 +18 18 49.0 2.97 n.a. 54.8 n.a. 0.4152187459 34.77854 2004-May-16 00:00 08 37 58.42 +21 18 42.6 08 38 12.47 +21 17 57.7 3.07 n.a. 55.5 n.a. 0.4359633361 36.99809 2004-May-17 00:00 08 43 32.19 +24 00 32.2 08 43 46.46 +23 59 46.6 3.18 n.a. 56.4 n.a. 0.4578871691 38.87095 2004-May-18 00:00 08 48 45.76 +26 26 39.3 08 49 00.23 +26 25 53.1 3.29 n.a. 57.3 n.a. 0.4808031730 40.44207 2004-May-19 00:00 08 53 40.69 +28 38 40.5 08 53 55.34 +28 37 53.7 3.39 n.a. 58.2 n.a. 0.5045492300 41.75268 2004-May-20 00:00 08 58 18.41 +30 38 07.4 08 58 33.23 +30 37 20.0 3.50 n.a. 59.1 n.a. 0.5289856791 42.83926 2004-May-21 00:00 09 02 40.26 +32 26 24.2 09 02 55.23 +32 25 36.2 3.60 n.a. 60.1 n.a. 0.5539925326 43.73346 2004-May-22 00:00 09 06 47.48 +34 04 47.1 09 07 02.58 +34 03 58.5 3.71 n.a. 61.0 n.a. 0.5794667423 44.46238 2004-May-23 00:00 09 10 41.20 +35 34 23.7 09 10 56.43 +35 33 34.6 3.81 n.a. 62.0 n.a. 0.6053196897 45.04899 2004-May-24 00:00 09 14 22.47 +36 56 14.1 09 14 37.82 +36 55 24.4 3.91 n.a. 63.0 n.a. 0.6314749736 45.51271 2004-May-25 00:00 09 17 52.26 +38 11 10.8 09 18 07.71 +38 10 20.6 4.01 n.a. 63.9 n.a. 0.6578665074 45.86994 2004-May-26 00:00 09 21 11.46 +39 19 59.9 09 21 26.99 +39 19 09.3 4.10 n.a. 64.9 n.a. 0.6844369095 46.13452 2004-May-27 00:00 09 24 20.88 +40 23 21.8 09 24 36.48 +40 22 30.8 4.20 n.a. 65.8 n.a. 0.7111361566 46.31815 2004-May-28 00:00 09 27 21.28 +41 21 51.7 09 27 36.95 +41 21 00.3 4.29 n.a. 66.8 n.a. 0.7379204640 46.43079 2004-May-29 00:00 09 30 13.35 +42 16 00.4 09 30 29.07 +42 15 08.7 4.38 n.a. 67.7 n.a. 0.7647513583 46.48093 2004-May-30 00:00 09 32 57.73 +43 06 14.9 09 33 13.50 +43 05 22.8 4.47 n.a. 68.6 n.a. 0.7915949090 46.47586 2004-May-31 00:00 09 35 35.03 +43 52 58.9 09 35 50.83 +43 52 06.4 4.56 n.a. 69.5 n.a. 0.8184210902 46.42184 2004-Jun-01 00:00 09 38 05.77 +44 36 33.1 09 38 21.61 +44 35 40.2 4.64 n.a. 70.4 n.a. 0.8452032426 46.32428 *************************************************************************************************************************** Column meaning: TIME Prior to 1962, 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 uniform Coordinate Time scale is used internally. Conversion between CT 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._(ICRF/J2000.0)_DEC = J2000.0 astrometric right ascension and declination of target. Corrected for light-time. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f) 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) 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 Illu% = Fraction of target circular disk illuminated by Sun (phase), as seen by observer. Units: PERCENT Ang-diam = The equatorial angular width of the target body full disk, if it were fully visible to the observer. Units: ARCSECONDS delta deldot = Target apparent range ("delta") and range-rate ("delta-dot") relative to observer. Units: AU and KM/S 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 (via browser) telnet ssd.jpl.nasa.gov 6775 (via command-line) Author : Jon.Giorgini@jpl.nasa.gov *************************************************************************************************************************** JPL/SSD Home Credits/Awards Contact: Webmaster (webmaster@ssd.jpl.nasa.gov) Last modified: 2004 January 13 11:01