Ephemeris Generator
Ephemeris Settings
Target Body: Asteroid (2004 PU2)
Observer Location: Asiago Observatory, Cima Ekar [Code=98]
Coordinates: 11°34'07.7''E, 45°50'58.8''N, 1395.37 m
From: A.D. 2004-08-14 00:00 UT+2
To: A.D. 2004-08-16 00:00
Step: 1 hour
Format: Calendar Date and Time
Output Quantities: 1-4,8-10,19-20,23-24,27,29,33
Ref. Frame, RA/Dec Format: J2000, HMS
Apparent Coordinates Model: Airless
HORIZONS Generated Ephemeris
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Ephemeris / WWW_USER Sun Aug 15 02:27:11 2004 Pasadena, USA / Horizons
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Target body name: (2004 PU2) {source: E2004P43}
Center body name: Earth (399) {source: DE-0406LE-0406}
Center-site name: Asiago Observatory, Cima Ekar
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Start time : A.D. 2004-Aug-14 00:00:00.0000 UT+02:00
Stop time : A.D. 2004-Aug-16 00:00:00.0000 UT+02:00
Step-size : 60 minutes
*******************************************************************************
Center geodetic : 11.568800, 45.8497, 1.398{E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 11.568800, 4451.2996, 4554.626{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
Time zone : UT+02:00
EOP file : eop.040813.p041104
EOP coverage : DATA-BASED 1962-JAN-20 TO 2004-AUG-13. PREDICTS-> 2004-NOV-03
Units conversion: 1 AU= 149597870.691 km, c= 299792.458 km/s, 1 day= 86400.0 s
Table cut-offs 1: Elevation ( 0.0deg=YES),Airmass (>38.000=NO), Daylight (YES)
Table cut-offs 2: Solar Elongation ( 0.0,180.0=NO )
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Initial FK5/J2000.0 heliocentric ecliptic TWO-BODY elements (AU, DAYS, DEG):
EPOCH= 2453220.5 ! 2004-Aug-03.00 (CT) RMSW= n.a.
EC= .3418089 QR= 1.5666502 TP= 2453183.019985
OM= 39.81061 W= 278.14325 IN= 21.90842
Asteroid physical parameters (KM, SEC, rotational period in hours):
GM= n.a. RAD= n.a. ROTPER= n.a.
H= n.a. G= n.a. B-V= n.a.
ALBEDO= n.a. STYP= n.a.
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Date_(ZONE)_HR:MN R.A._(ICRF/J2000.0)_DEC R.A.__(a-apparent)__DEC dRA*cosD d(DEC)/dt Azi_(a-appr)_Elev a-mass APmag Illu% r rdot delta deldot S-O-T /r S-T-O PsAng PsAMV Cnst GlxLat
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>..... Elevation Cut-off Requested .....<
2004-Aug-14 02:00 02 14 26.94 -21 01 22.0 02 14 39.90 -20 59 51.0 18.37 11.10 126.3535 4.2692 11.322 n.a. 90.9 1.6136518372 3.25809 0.9132715763 -8.42382 113.6913 /L 35.0933 263.0 208.9 Cet -70.12
2004-Aug-14 03:00 02 14 28.23 -21 01 10.8 02 14 41.20 -20 59 39.9 17.94 11.20 138.1796 12.0206 4.674 n.a. 90.9 1.6137303311 3.26057 0.9130694300 -8.37345 113.7188 /L 35.0825 263.1 208.9 Cet -70.11
2004-Aug-14 04:00 m 02 14 29.50 -21 00 59.6 02 14 42.47 -20 59 28.6 17.60 11.33 151.2987 18.0729 3.187 n.a. 90.9 1.6138088846 3.26305 0.9128686957 -8.30870 113.7464 /L 35.0715 263.1 208.9 Cet -70.11
2004-Aug-14 05:00 Nm 02 14 30.75 -21 00 48.2 02 14 43.72 -20 59 17.2 17.36 11.48 165.6673 21.9227 2.658 n.a. 90.9 1.6138874978 3.26553 0.9126696716 -8.23387 113.7740 /L 35.0605 263.1 209.0 Cet -70.10
2004-Aug-14 06:00 Cm 02 14 31.98 -21 00 36.6 02 14 44.95 -20 59 05.7 17.23 11.64 180.8091 23.1615 2.525 n.a. 90.9 1.6139661707 3.26801 0.9124725425 -8.15391 113.8016 /L 35.0495 263.1 209.0 Cet -70.10
>..... Daylight Cut-off Requested .....<
>..... Elevation Cut-off Requested .....<
2004-Aug-15 02:00 02 14 58.49 -20 56 43.7 02 15 11.48 -20 55 12.7 16.65 11.01 126.9481 4.8084 10.349 n.a. 91.0 1.6155521313 3.31744 0.9085713102 -8.36910 114.3396 /L 34.8370 263.6 209.1 Cet -69.98
2004-Aug-15 03:00 02 14 59.66 -20 56 32.6 02 15 12.65 -20 55 01.6 16.22 11.12 138.8505 12.4821 4.513 n.a. 91.0 1.6156320531 3.31990 0.9083705032 -8.31750 114.3676 /L 34.8259 263.6 209.1 Cet -69.97
2004-Aug-15 04:00 02 15 00.81 -20 56 21.4 02 15 13.80 -20 54 50.5 15.88 11.25 152.0563 18.4278 3.129 n.a. 91.1 1.6157120342 3.32237 0.9081711328 -8.25171 114.3956 /L 34.8146 263.6 209.1 Cet -69.97
2004-Aug-15 05:00 Am 02 15 01.93 -20 56 10.1 02 15 14.93 -20 54 39.2 15.64 11.40 166.5004 22.1420 2.634 n.a. 91.1 1.6157920745 3.32483 0.9079734915 -8.17607 114.4236 /L 34.8033 263.7 209.1 Cet -69.96
2004-Aug-15 06:00 Cm 02 15 03.04 -20 55 58.6 02 15 16.04 -20 54 27.7 15.52 11.56 181.6802 23.2257 2.519 n.a. 91.1 1.6158721741 3.32729 0.9077777573 -8.09559 114.4516 /L 34.7919 263.7 209.1 Cet -69.96
>..... Daylight Cut-off Requested .....<
>..... Elevation Cut-off Requested .....<
****************************************************************************************************************************************************************************************************************************
Column meaning:
** WARNING **
The initial state available for this object was a Keplerian two-body
orbital element set, not osculating elements. This means the orbit is probably
very poorly determined. Predictions for times many months or years from the
epoch may not be suitable for high-accuracy applications or expectations.
Since the epoch is inside or within ~30 days of the relatively short data
arc, the elements (such as they are) were numerically propagated with
perturbations, just as if they were osculating elements.
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: A time-zone correction has been requested. See header.
NOTE: "n.a." in output means quantity "not available" at the print-time.
SOLAR PRESENCE
Time tag is followed by a blank, then a solar-presence symbol:
'*' Daylight (refracted solar upper-limb on or above apparent horizon)
'C' Civil twilight/dawn
'N' Nautical twilight/dawn
'A' Astronomical twilight/dawn
' ' Night OR geocentric ephemeris
LUNAR PRESENCE
The solar-presence symbol is immediately followed by a lunar-presence symbol:
'm' Refracted upper-limb of Moon on or above apparent horizon
' ' Refracted upper-limb of Moon below apparent horizon OR geocentric
ephemeris
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)
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
Azi_(a-appr)_Elev =
Airless apparent azimuth and elevation of target. Corrected for light-time,
the gravitational deflection of light, stellar aberration, precession and
nutation. Azimuth measured North(0) -> East(90) -> South(180) -> West(270),
elevation with respect to plane perpendicular to local zenith direction.
TOPOCENTRIC ONLY. Units: DEGREES
a-mass =
Relative optical airmass. Topocentric EARTH sites, ABOVE HORIZON ONLY.
Unitless.
APmag =
Asteroid's approximate apparent visual magnitude by following definition:
APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi1 + G*phi2).
Units: none
Illu% =
Fraction of target circular disk illuminated by Sun (phase), as seen by
observer. Units: PERCENT
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 /r =
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. Angular units: DEGREES.
The '/r' column is a Sun-relative code, output for observing sites
with defined rotation models only.
/T indicates target trails Sun (evening sky)
/L indicates target leads Sun (morning sky)
NOTE: The S-O-T solar elongation angle is the total separation in any
direction. It does not indicate the angle of Sun leading or trailing.
S-T-O =
Sun-Target-Observer angle; target's apparent PHASE ANGLE as seen at
observer's location at print time. Units: DEGREES
PsAng PsAMV =
The position angles of the extended Sun->target radius vector ("PsAng")
and the negative of the target's heliocentric velocity vector ("PsAMV"),
as seen in the observer's plane-of-sky, measured CCW from reference frame
North Celestial Pole. Small-bodies only. Units: DEGREES.
Cnst =
Constellation ID; the 3-letter abbreviation for the constellation name of
target's astrometric position, as defined by IAU (1930) boundary delineation.
See documentation for list of abbreviations.
GlxLat =
Observer-centered Galactic System II (post WW II) latitude of the target's
apparent position. Corrected for light-time, the gravitational deflection of
light and stellar aberration. 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 (via browser)
telnet ssd.jpl.nasa.gov 6775 (via command-line)
Author : Jon.Giorgini@jpl.nasa.gov
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Credits/Awards
Contact: Webmaster
(webmaster@ssd.jpl.nasa.gov)
Last modified: 2004 May 28 11:38