79 lines
3.9 KiB
Plaintext
79 lines
3.9 KiB
Plaintext
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Ephemeris / WWW_USER Tue Mar 24 10:51:53 2020 Pasadena, USA / Horizons
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Target body name: Hale-Bopp (C/1995 O1) {source: JPL#J971B/1}
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Center body name: Solar System Barycenter (0) {source: DE431}
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Center-site name: BODY CENTER
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Start time : A.D. 1997-Mar-30 22:30:30.0910 TDB
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Stop time : A.D. 1997-Mar-30 22:30:30.1536 TDB
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Step-size : 1440 minutes
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Center geodetic : 0.00000000,0.00000000,0.0000000 {E-lon(deg),Lat(deg),Alt(km)}
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Center cylindric: 0.00000000,0.00000000,0.0000000 {E-lon(deg),Dxy(km),Dz(km)}
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Center radii : (undefined)
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Small perturbers: Yes {source: SB431-N16}
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Output units : AU-D
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Output type : GEOMETRIC cartesian states
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Output format : 2 (position and velocity)
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Reference frame : ICRF/J2000.0
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Coordinate systm: Earth Mean Equator and Equinox of Reference Epoch
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Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.):
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EPOCH= 2454724.5 ! 2008-Sep-15.0000000 (TDB) RMSW= n.a.
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EC= .9949607008417696 QR= .9174143409263262 TP= 2450538.4378482755
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OM= 282.9487539423989 W= 130.662020526416 IN= 89.21708989130315
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Equivalent ICRF heliocentric equatorial cartesian coordinates (au, au/d):
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X= 1.777310651689592E+00 Y= 1.638390146876578E+00 Z=-2.712743223120575E+01
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VX= 4.707733989610805E-04 VY=-5.688697324947830E-04 VZ=-4.422633506777067E-03
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Comet physical (GM= km^3/s^2; RAD= km):
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GM= n.a. RAD= 30.
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M1= 4. M2= n.a. k1= 8. k2= n.a. PHCOF= n.a.
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JDTDB
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X Y Z
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VX VY VZ
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$$SOE
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2450538.437848276 = A.D. 1997-Mar-30 22:30:30.0910 TDB
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X =-1.232674024434804E-01 Y = 2.349174352473917E-01 Z = 8.796973894528012E-01
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VX=-4.387926446563824E-03 VY= 2.393800286856415E-02 VZ=-7.291132333297985E-03
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$$EOE
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Coordinate system description:
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NOTE:
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The ICRF is quasar-based; the EME description below is given as a dynamical
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explanation of the previous system to which the ICRF was closely aligned.
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ICRF ("Earth Mean Equator and Equinox of Reference Epoch")
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Reference epoch: J2000.0
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XY-plane: plane of the Earth's mean equator at the reference epoch
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X-axis : out along ascending node of instantaneous plane of the Earth's
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orbit and the Earth's mean equator at the reference epoch
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Z-axis : along the Earth mean north pole at the reference epoch
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Symbol meaning [1 au= 149597870.700 km, 1 day= 86400.0 s]:
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JDTDB Julian Day Number, Barycentric Dynamical Time
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X X-component of position vector (au)
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Y Y-component of position vector (au)
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Z Z-component of position vector (au)
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VX X-component of velocity vector (au/day)
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VY Y-component of velocity vector (au/day)
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VZ Z-component of velocity vector (au/day)
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Geometric states/elements have no aberrations applied.
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Computations by ...
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Solar System Dynamics Group, Horizons On-Line Ephemeris System
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4800 Oak Grove Drive, Jet Propulsion Laboratory
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Pasadena, CA 91109 USA
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Information: http://ssd.jpl.nasa.gov/
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Connect : telnet://ssd.jpl.nasa.gov:6775 (via browser)
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http://ssd.jpl.nasa.gov/?horizons
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telnet ssd.jpl.nasa.gov 6775 (via command-line)
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Author : Jon.D.Giorgini@jpl.nasa.gov
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