MPEC 2007-J40 : COMET C/2006 WD4 (LEMMON)
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M.P.E.C. 2007-J40 Issued 2007 May 11, 15:24 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
COMET C/2006 WD4 (LEMMON)
Observations:
CK06W04D C2007 05 03.79842 00 57 08.15 -10 23 17.8 15.4 N EJ040E26
CK06W04D C2007 05 03.80391 00 57 08.97 -10 23 16.5 16.2 N EJ040E26
CK06W04D C2007 05 07.81082 01 11 57.67 -09 48 52.5 15.9 N EJ040E12
CK06W04D C2007 05 07.81188 01 11 57.97 -09 48 51.5 EJ040E12
CK06W04D C2007 05 07.81241 01 11 58.16 -09 48 50.6 EJ040E12
Observer details:
E12 Siding Spring Survey. Observer G. J. Garradd. 0.5-m Uppsala Schmidt
+ CCD.
E26 RAS Observatory, Biggera Waters. Observers E. Guido, G. Sostero. 0.15-m
f/6.0 reflector + CCD.
Orbital elements:
C/2006 WD4 (Lemmon)
Epoch 2007 Apr. 10.0 TT = JDT 2454200.5
T 2007 Apr. 28.3994 TT MPC
q 0.591239 (2000.0) P Q
z +0.001735 Peri. 292.6919 +0.3334336 -0.8815363
+/-0.000004 Node 226.7905 -0.6046945 -0.4719687
e 0.998974 Incl. 152.7044 -0.7233025 -0.0118027
From 74 observations 2006 Nov. 20-2007 May 7, mean residual 0".6.
Ephemeris:
C/2006 WD4 (Lemmon)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2007 05 10 01 24.56 -09 03.8 0.575 0.645 36.4 111.6 13.4
2007 05 11 01 31.87 -08 33.9 0.536 0.654 35.7 115.8 13.3
2007 05 12 01 40.42 -07 56.5 0.498 0.663 34.6 120.1 13.2
2007 05 13 01 50.45 -07 09.8 0.462 0.674 33.2 124.7 13.1
2007 05 14 02 02.29 -06 11.9 0.426 0.684 31.4 129.6 13.0
2007 05 15 02 16.28 -05 00.1 0.392 0.695 29.2 134.9 12.9
2007 05 25 07 08.89 +18 34.7 0.291 0.825 43.1 122.9 13.0
2007 05 26 07 37.32 +19 45.5 0.313 0.839 48.6 115.2 13.2
2007 05 27 08 01.88 +20 33.1 0.339 0.854 53.1 108.4 13.5
2007 05 28 08 22.85 +21 03.6 0.368 0.868 56.8 102.4 13.7
2007 05 29 08 40.66 +21 22.2 0.399 0.883 59.8 97.2 14.0
2007 05 30 08 55.82 +21 32.8 0.432 0.898 62.3 92.5 14.2
2007 06 04 09 45.20 +21 33.5 0.610 0.974 68.6 75.8 15.3
2007 06 09 10 11.49 +21 12.5 0.797 1.052 69.8 64.9 16.2
2007 06 14 10 27.86 +20 51.2 0.984 1.131 68.9 56.9 17.0
2007 06 19 10 39.33 +20 31.5 1.168 1.210 66.8 50.5 17.7
2007 06 24 10 48.13 +20 13.3 1.349 1.289 64.2 45.3 18.3
2007 06 29 10 55.34 +19 56.0 1.525 1.367 61.3 40.7 18.8
2007 07 04 11 01.56 +19 39.3 1.695 1.445 58.2 36.7 19.2
2007 07 09 11 07.15 +19 23.1 1.860 1.523 54.9 33.1 19.7
2007 07 14 11 12.30 +19 07.1 2.019 1.599 51.6 29.9 20.1
2007 07 19 11 17.15 +18 51.5 2.172 1.675 48.2 26.9 20.4
The "original" and "future" barycentric values of 1/a are +0.002261
and +0.001805 (+/- 0.000004) AU^-1, respectively.
Brian G. Marsden (C) Copyright 2007 MPC M.P.E.C. 2007-J40
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