Bruce Macdonald suggested US West Coast as a good observing position for seeing Genesis re-entry.
This output of the HORIZONS system at JPL
(URL below ) show a daylight pass in the North at elevations of around 20 degrees
and ranges of about 225 Km. This phase isnt visible from Southern or Northern California
as a check on Mt Palomar or San Francisco confirmed.
A little checking with Atlas is needed for some place a little further North.
Tony Beresford
Currently cant get any later time than 15:53 UT
or 08:53 PDT out of horizons.
Ephemeris Generator
Ephemeris Settings
Target Body: Genesis Spacecraft
Observer Location: Eugene, OR
Coordinates: 123°04'01.2''W, 44°04'00.0''N
From: A.D. 2004-09-08 15:00 UT
To: A.D. 2004-09-08 15:53
Step: 1 minute
Format: Calendar Date and Time
Output Quantities: 1,4,9,20,23
Ref. Frame, RA/Dec Format: J2000, HMS
Apparent Coordinates Model: Airless
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HORIZONS Generated Ephemeris
*******************************************************************************
Ephemeris / WWW_USER Fri Sep 3 04:44:44 2004 Pasadena, USA / Horizons
*******************************************************************************
Target body name: Genesis Spacecraft (-47) {source: Genesis_ref10_od106_de40}
Center body name: Earth (399) {source: DE-0406LE-0406}
Center-site name: (User Defined Site)
*******************************************************************************
Start time : A.D. 2004-Sep-08 15:00:00.0000 UT
Stop time : A.D. 2004-Sep-08 15:53:00.0000 UT
Step-size : 1 minutes
******************************************************************************************************************
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC Azi_(a-appr)_Elev APmag S-brt delta deldot S-O-T /r
******************************************************************************************************************
2004-Sep-08 15:48 *m 23 30 29.98 +26 16 29.1 301.7844 5.4740 6.09 n.a. 0.0000198186 -10.02778 147.8918 /L
2004-Sep-08 15:49 *m 23 35 06.62 +28 02 46.2 302.4155 7.3148 5.67 n.a. 0.0000157655 -10.18973 145.9611 /L
2004-Sep-08 15:50 *m 23 40 34.85 +30 25 56.4 303.3729 9.7120 5.11 n.a. 0.0000116518 -10.32663 143.3762 /L
2004-Sep-08 15:51 *m 23 48 08.21 +34 24 47.3 305.2302 13.5131 4.32 n.a. 0.0000074936 -10.39915 139.1291 /L
2004-Sep-08 15:52 *m 00 06 58.96 +45 49 02.7 311.7194 23.7052 3.06 n.a. 0.0000033588 -10.04178 127.1779 /L
2004-Sep-08 15:53 *t 11 12 00.67 +15 40 11.4 95.9629 28.8069 6.07 n.a. 0.0000015625 7.60125 10.2711 /T
******************************************************************************************************************
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.
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
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)
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
APmag S-brt =
Target's approximate apparent visual magnitude & surface brightness. Planet
& satellite values are available for Earth or Moon observing sites only. Values
for the Sun, comets and asteroids ARE available for non-Earth sites.
Units: NONE & VISUAL MAGNITUDES PER SQUARE ARCSECOND
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.
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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Last modified: 2004 August 21 19:12
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