MPEC 2008-R08 : 2007 YM56
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M.P.E.C. 2008-R08 Issued 2008 Sept. 1, 17:43 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 YM56
Revision to MPEC 2008-A07
Additional Observations:
K07Y56M C2008 08 31.22428 23 34 02.12 +20 15 21.4 21.9 V ER008H55
K07Y56M C2008 08 31.24779 23 33 58.53 +20 15 05.7 22.1 V ER008H55
K07Y56M C2008 08 31.27619 23 33 54.22 +20 14 45.5 22.2 V ER008H55
K07Y56M C2008 09 01.24700 23 31 33.72 +20 03 02.9 22.0 V ER008H55
K07Y56M C2008 09 01.26256 23 31 31.44 +20 02 51.8 21.9 V ER008H55
K07Y56M C2008 09 01.27766 23 31 29.06 +20 02 40.7 22.1 V ER008H55
Observer details:
H55 Astronomical Research Observatory, Charleston. Observer R. Holmes.
Measurer H. Devore. 0.81-m f/4.0 astrograph + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
080831 H55 4.6- 29.6- 080901 H55 4.9- 29.5- MPO136010 -0.0016 day
Orbital elements:
2007 YM56 Earth MOID = 0.0300 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 155.33619 (2000.0) P Q
n 0.70761198 Peri. 306.52816 -0.75908119 +0.64134237
a 1.2472091 Node 273.64310 -0.55577561 -0.72778296
e 0.3117311 Incl. 6.42606 -0.33898263 -0.24292369
P 1.39 H 22.3 G 0.15 U 4
Residuals in seconds of arc
071230 691 0.1+ 0.1+ 080111 291 0.1- 0.3+ 080128 H55 0.3+ 0.5+
071230 691 0.2- 0.4+ 080112 G96 0.6+ 0.1+ 080128 H55 0.6+ 0.1+
071230 691 0.5- 0.3- 080112 G96 0.8+ 0.1- 080128 H55 0.5+ 0.1+
071230 291 0.3+ 0.7- 080112 G96 0.8+ 0.2+ 080201 291 (1.9+ 1.4-)
071230 291 0.3- 0.3- 080112 G96 0.9+ 0.3+ 080201 291 (2.0+ 1.0+)
071230 291 0.3- 1.2- 080113 G96 0.2+ 0.3+ 080201 291 (2.8+ 0.5+)
071231 291 0.3- 0.1- 080113 G96 0.5+ 0.1+ 080224 H55 0.3- 0.6+
071231 291 0.5- 0.6+ 080113 291 0.2- 0.2+ 080224 H55 0.8- 0.1-
080101 291 1.0- 0.6+ 080113 G96 0.7+ 0.3- 080224 H55 0.3- 0.1+
080101 291 0.1- 0.2+ 080113 291 0.2- 0.2+ 080224 291 1.0- 0.6+
080101 291 0.7- 0.1+ 080113 291 0.1- 0.2+ 080224 291 0.8+ 0.4-
080103 H55 0.6+ 0.1+ 080115 291 0.6- 0.2+ 080224 291 1.2+ 1.0-
080103 H55 0.4+ 0.2- 080115 291 0.5- 0.4- 080831 H55 0.1+ 0.2-
080103 H55 0.7+ 0.2+ 080115 291 0.1- 0.1+ 080831 H55 0.1- 0.3+
080110 291 0.5- 0.3+ 080117 291 0.1- 0.2- 080831 H55 0.1+ 0.2-
080110 291 0.3- 0.2+ 080117 291 1.2+ 0.6- 080901 H55 0.1- 0.5-
080110 291 0.3- 0.0 080117 291 0.8+ 0.2+ 080901 H55 1.1+ 0.1-
080111 291 0.2- 0.3+ 080119 291 0.9+ 0.1- 080901 H55 0.0 0.0
080111 291 0.1- 0.3+ 080119 291 0.5+ 0.2-
Ephemeris:
2007 YM56 a,e,i = 1.25, 0.31, 6 q = 0.8584
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 09 01 23 32.16 +20 06.2 0.404 1.371 149.0 22.3 22.1
2008 09 11 23 08.86 +17 32.5 0.427 1.411 157.8 15.6 22.1
2008 09 21 22 49.77 +14 21.1 0.467 1.448 158.2 14.9 22.3
2008 10 01 22 37.04 +11 09.5 0.524 1.482 151.0 19.1 22.7
Gareth V. Williams (C) Copyright 2008 MPC M.P.E.C. 2008-R08
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