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Ephemeris / WWW_USER Thu Jul 9 00:52:27 2009 Pasadena, USA / Horizons
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Target body name: 22P/Kopff {source: JPL#K083/9}
Center body name: Earth (399) {source: DE405}
Center-site name: (user defined site below)
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Start time : A.D. 2009-Jul-09 00:00:00.0000 UT
Stop time : A.D. 2009-Aug-08 00:00:00.0000 UT
Step-size : 1440 minutes
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Target pole/equ : No model available
Target radii : 1.7 km
Center geodetic : 21.0833000,52.5834461,.00034815 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 21.0833000,3883.60289,5042.5089 {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 primary : Sun {source: DE405}
Interfering body: MOON (Req= 1737.400) km {source: DE405}
Deflecting body : Sun, EARTH {source: DE405}
Deflecting GMs : 1.3271E+11, 3.9860E+05 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.090708.p090929
EOP coverage : DATA-BASED 1962-JAN-20 TO 2009-JUL-08. PREDICTS-> 2009-SEP-28
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 )
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Initial FK5/J2000.0 heliocentric ecliptic osculating elements (AU, DAYS, DEG):
EPOCH= 2454841.5 != 2009-Jan-10.0000000 (CT) Residual RMS= 1.122
EC= .5442395727198547 QR= 1.577601106228556 TP= 2454976.927115339
OM= 120.897134725929 W= 162.8182427538526 IN= 4.724409000211078
Comet physical & dynamic parameters (KM, SEC; A1,A2,A3=AU/d^2; DT=days):
GM= n.a. RAD= 1.67 A1= 4.329596D-10
A2= -8.206833D-10 A3= -2.393084E-9 DT= n.a.
M1= 10.9 M2= 14.2 k1= 10.
k2= 5. PHCOF= .030
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Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC T-mag N-mag delta deldot S-O-T /r S-T-O
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$$SOE
2009-Jul-09 00:00 Am 22 50 27.27 -09 06 04.7 12.61 15.74 .818780597429271 -5.5169140 126.2776 /L 29.9899
2009-Jul-10 00:00 Am 22 51 18.98 -09 07 26.7 12.61 15.72 .815728675476613 -5.3653046 127.0399 /L 29.6097
2009-Jul-11 00:00 Am 22 52 08.29 -09 09 04.7 12.61 15.71 .812763447616657 -5.2103518 127.8128 /L 29.2208
2009-Jul-12 00:00 Am 22 52 55.20 -09 10 58.8 12.61 15.69 .809886866534141 -5.0518377 128.5963 /L 28.8230
2009-Jul-13 00:00 Am 22 53 39.69 -09 13 09.0 12.61 15.68 .807101012662158 -4.8895365 129.3906 /L 28.4164
2009-Jul-14 00:00 Am 22 54 21.74 -09 15 35.2 12.61 15.66 .804408098918830 -4.7232138 130.1958 /L 28.0009
2009-Jul-15 00:00 Am 22 55 01.34 -09 18 17.4 12.61 15.64 .801810475831778 -4.5526263 131.0118 /L 27.5765
2009-Jul-16 00:00 Am 22 55 38.47 -09 21 15.7 12.62 15.63 .799310636942982 -4.3775213 131.8386 /L 27.1433
2009-Jul-17 00:00 Am 22 56 13.13 -09 24 29.8 12.62 15.61 .796911223501945 -4.1976399 132.6763 /L 26.7012
2009-Jul-18 00:00 Am 22 56 45.30 -09 27 59.7 12.62 15.60 .794615026098150 -4.0127253 133.5249 /L 26.2503
2009-Jul-19 00:00 Am 22 57 14.99 -09 31 45.1 12.62 15.58 .792424979324604 -3.8225387 134.3843 /L 25.7907
2009-Jul-20 00:00 Am 22 57 42.19 -09 35 46.1 12.62 15.57 .790344144641231 -3.6268839 135.2545 /L 25.3223
2009-Jul-21 00:00 A 22 58 06.91 -09 40 02.1 12.63 15.55 .788375677741203 -3.4256356 136.1354 /L 24.8453
2009-Jul-22 00:00 A 22 58 29.15 -09 44 33.1 12.63 15.54 .786522781103843 -3.2187598 137.0268 /L 24.3598
2009-Jul-23 00:00 A 22 58 48.93 -09 49 18.7 12.63 15.52 .784788649237174 -3.0063171 137.9286 /L 23.8659
2009-Jul-24 00:00 A 22 59 06.27 -09 54 18.4 12.64 15.50 .783176419559311 -2.7884404 138.8407 /L 23.3638
2009-Jul-25 00:00 A 22 59 21.19 -09 59 32.0 12.64 15.49 .781689141378387 -2.5652963 139.7628 /L 22.8537
2009-Jul-26 00:00 A 22 59 33.71 -10 04 59.0 12.65 15.47 .780329768319354 -2.3370455 140.6948 /L 22.3357
2009-Jul-27 00:00 A 22 59 43.86 -10 10 38.9 12.65 15.46 .779101170445671 -2.1038157 141.6364 /L 21.8101
2009-Jul-28 00:00 A 22 59 51.68 -10 16 31.2 12.66 15.45 .778006156898676 -1.8656921 142.5873 /L 21.2771
2009-Jul-29 00:00 A 22 59 57.19 -10 22 35.6 12.67 15.43 .777047499942415 -1.6227211 143.5473 /L 20.7370
2009-Jul-30 00:00 A 23 00 00.42 -10 28 51.4 12.67 15.42 .776227954711465 -1.3749204 144.5163 /L 20.1899
2009-Jul-31 00:00 A 23 00 01.43 -10 35 18.3 12.68 15.40 .775550272726982 -1.1222896 145.4937 /L 19.6361
2009-Aug-01 00:00 A 23 00 00.23 -10 41 55.5 12.69 15.39 .775017209752235 -0.8648189 146.4795 /L 19.0760
2009-Aug-02 00:00 A 22 59 56.88 -10 48 42.6 12.70 15.38 .774631529631078 -0.6024944 147.4732 /L 18.5099
2009-Aug-03 00:00 A 22 59 51.42 -10 55 39.1 12.71 15.36 .774396005857479 -0.3353007 148.4745 /L 17.9379
2009-Aug-04 00:00 m 22 59 43.89 -11 02 44.2 12.72 15.35 .774313422251631 -0.0632217 149.4831 /L 17.3606
2009-Aug-05 00:00 m 22 59 34.34 -11 09 57.5 12.73 15.34 .774386573588217 0.2137600 150.4985 /L 16.7782
2009-Aug-06 00:00 m 22 59 22.83 -11 17 18.3 12.74 15.33 .774618266502036 0.4956634 151.5202 /L 16.1911
2009-Aug-07 00:00 m 22 59 09.41 -11 24 45.8 12.75 15.32 .775011320577863 0.7825093 152.5479 /L 15.5998
2009-Aug-08 00:00 m 22 58 54.13 -11 32 19.6 12.76 15.30 .775568569270489 1.0743195 153.5809 /L 15.0047
$$EOE
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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 (OBSERVING SITE)
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 (OBSERVING SITE)
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 center.
Corrected for light-time. 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
delta deldot =
Range ("delta") and range-rate ("delta-dot") of target center with respect
to the observer at the instant light seen by the observer at print-time would
have left the target center (print-time minus down-leg light-time); the
distance traveled by a light ray emanating from the center of the target and
recorded by the observer at print-time. "deldot" is a projection of the
velocity vector along this ray, the light-time-corrected line-of-sight from the
coordinate center, and indicates relative motion. A positive "deldot" means the
target center is moving away from the observer (coordinate center). A negative
"deldot" means the target center is moving toward the 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 (~ PHASE ANGLE) angle: the vertex angle at target center
formed by a vector to the apparent center of the Sun and a vector intersecting
the observer at print-time. This measurable angle is within 20 arcseconds
(0.006 deg) of the reduced PHASE ANGLE at observer's location at print time.
The difference is due to down-leg stellar aberration affecting measured target
position but not apparent solar illumination direction. When computing phase,
Horizons uses the true phase angle, not S-T-O, but the resulting difference
in illuminated fraction is less than 0.001%.
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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