MPEC 2008-P09 : 2007 RT15
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M.P.E.C. 2008-P09 Issued 2008 Aug. 3, 22:39 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
2007 RT15
Revision to MPEC 2008-A42
Additional Observations:
K07R15T C2003 10 22.22721 01 10 15.58 -05 57 26.1 21.3 R EP009675
K07R15T C2003 10 22.28900 01 10 15.21 -05 57 27.9 21.8 R EP009675
K07R15T C2003 10 22.35265 01 10 14.82 -05 57 29.2 21.5 R EP009675
K07R15T C2008 07 31.41417 01 57 35.86 +00 21 31.2 EP009675
K07R15T C2008 08 02.40157 01 57 36.49 +00 20 56.1 EP009675
K07R15T C2008 08 03.39818 01 57 36.64 +00 20 37.2 EP009675
Observer details:
675 Palomar Mountain. Observers M. E. Schwamb, M. E. Brown, C. Trujillo,
D. Rabinowitz. 1.5-m f/8.5 Cassegrain + CCD, 1.2-m Schmidt + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees) and reference
031022 675 0.09+ 0.04+ 080803 675 22.8- 6.3- E2008-O49
Orbital elements:
2007 RT15
Epoch 2008 May 14.0 TT = JDT 2454600.5 MPC
M 16.69964 (2000.0) P Q
n 0.00398334 Peri. 275.21624 +0.97391534 +0.04804613
a 39.4128755 Node 82.16096 +0.04985532 +0.90813663
e 0.2302589 Incl. 12.93577 -0.22136702 +0.41590795
P 247 H 6.9 G 0.15 U 3
Residuals in seconds of arc
031022 675 0.0 0.1- 070914 705 0.3+ 0.1- 071018 675 1.0- 0.8-
031022 675 0.0 0.2- 070914 705 0.2+ 0.0 071204 675 0.3+ 0.3-
031022 675 0.1- 0.3+ 070916 705 0.1- 0.2- 071214 675 0.5+ 0.2+
070905 705 0.0 0.1- 070916 705 0.5+ 0.3- 080731 675 0.3- 0.4+
070905 705 0.2+ 0.1- 070919 705 0.2+ 0.1- 080802 675 0.1- 0.3+
070911 675 0.1- 1.2+ 070919 705 0.1+ 0.2- 080803 675 0.2+ 0.2-
070911 675 0.3- 0.1+ 071018 675 0.1- 0.5-
070912 675 0.4- 0.7+ 071018 675 0.1- 0.3-
Ephemeris:
2007 RT15 a,e,i = 39.41, 0.23, 13 q = 30.338
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 08 02 01 57.61 +00 21.1 30.764 30.995 102.3 1.8 22.0
2008 08 12 01 57.55 +00 17.6 30.610 30.999 111.7 1.7 22.0
2008 08 22 01 57.30 +00 13.2 30.466 31.002 121.2 1.6 22.0
2008 09 01 01 56.86 +00 08.2 30.337 31.005 130.7 1.4 22.0
2008 09 11 01 56.26 +00 02.6 30.228 31.008 140.2 1.2 21.9
2008 09 21 01 55.51 -00 03.3 30.141 31.011 149.5 0.9 21.9
2008 10 01 01 54.65 -00 09.3 30.080 31.014 158.5 0.7 21.9
2008 10 11 01 53.70 -00 15.0 30.047 31.017 166.1 0.4 21.8
2008 10 21 01 52.70 -00 20.4 30.043 31.020 168.7 0.4 21.8
2008 10 31 01 51.70 -00 25.1 30.069 31.023 163.7 0.5 21.9
2008 11 10 01 50.73 -00 28.9 30.124 31.026 155.2 0.8 21.9
2008 11 20 01 49.83 -00 31.7 30.207 31.029 145.8 1.0 21.9
2008 11 30 01 49.03 -00 33.2 30.316 31.032 135.9 1.3 21.9
2008 12 10 01 48.38 -00 33.5 30.446 31.035 126.0 1.5 22.0
2008 12 20 01 47.89 -00 32.4 30.595 31.038 116.0 1.6 22.0
2008 12 30 01 47.59 -00 30.0 30.757 31.041 105.9 1.7 22.0
2009 01 09 01 47.50 -00 26.2 30.927 31.044 95.9 1.8 22.0
2009 01 19 01 47.61 -00 21.2 31.101 31.047 86.0 1.8 22.0
2009 01 29 01 47.92 -00 15.1 31.272 31.051 76.1 1.8 22.1
2009 02 08 01 48.44 -00 08.1 31.437 31.054 66.3 1.7 22.1
2009 02 18 01 49.15 -00 00.2 31.589 31.057 56.6 1.5 22.1
2009 02 28 01 50.03 +00 08.2 31.726 31.060 47.1 1.3 22.1
2009 03 10 01 51.05 +00 17.0 31.843 31.063 37.7 1.1 22.0
This apparent 2:3 Neptune librator remains more than 18 AU from Neptune
over a 14 000-year period.
In the note at the foot of MPEC 2008-O48, for 19 AU read 24 AU.
Brian G. Marsden (C) Copyright 2008 MPC M.P.E.C. 2008-P09
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