MPEC 2009-S137: 2008 DH23
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M.P.E.C. 2009-S137 Issued 2009 Sept. 29, 12:00 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
2008 DH23
Revision to MPEC 2008-E20
Additional Observations:
K08D23H C2009 09 28.43992 04 18 42.34 +51 48 16.0 21.4 R ES137926
K08D23H C2009 09 28.44473 04 18 43.00 +51 48 32.2 21.7 R ES137926
K08D23H C2009 09 28.44954 04 18 43.71 +51 48 48.1 21.5 R ES137926
K08D23H C2009 09 29.46854 04 21 15.87 +52 44 45.1 20.7 R ES137926
K08D23H C2009 09 29.47334 04 21 16.46 +52 45 00.9 21.1 R ES137926
K08D23H C2009 09 29.47816 04 21 17.26 +52 45 17.9 21.0 R ES137926
Observer details:
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. Measurer
P. R. Holvorcem. 0.81-m f/7 Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
090928 926 0.29- 0.08- 090929 926 0.29- 0.08- MPO138153 +0.28 day
Orbital elements:
2008 DH23 Earth MOID = 0.4549 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC
M 274.38906 (2000.0) P Q
n 0.46268287 Peri. 92.42071 -0.06205041 -0.99801569
a 1.6555683 Node 1.29168 +0.61718936 -0.04679182
e 0.2588172 Incl. 28.33068 +0.78436410 -0.04213333
P 2.13 H 19.8 G 0.15 U 3
Residuals in seconds of arc
080229 691 0.5- 0.3- 080303 J95 0.5+ 1.1+ 080315 691 0.8+ 0.8-
080229 691 0.1- 0.2- 080303 291 0.6- 0.1- 080327 291 0.2- 0.2+
080229 691 0.3- 0.5- 080303 291 0.0 0.1- 080327 291 0.0 0.3+
080301 H55 1.7- 0.8- 080303 291 0.1- 0.1+ 080327 291 0.0 0.4+
080301 H55 0.3+ 0.0 080306 291 0.0 0.1- 080328 291 1.4- 0.9-
080301 H55 0.2+ 0.1+ 080306 291 0.1- 0.0 080328 291 0.4+ 0.5+
080301 H55 0.3- 0.1+ 080306 291 0.1+ 0.1- 080328 291 0.4- 0.2+
080301 G96 0.4- 0.1+ 080307 448 1.0+ 0.4- 080329 291 0.4+ 0.3+
080301 G96 0.6- 0.2- 080307 448 0.5+ 0.5- 080329 291 0.1- 0.1-
080301 G96 0.0 0.4- 080307 448 0.4- 0.3+ 080329 291 0.1- 0.1-
080301 G96 0.1- 0.1+ 080310 691 0.2- 0.2- 090928 926 0.2+ 0.1-
080302 291 0.1+ 0.2- 080310 691 1.0+ 0.3- 090928 926 0.1+ 0.2+
080302 291 0.0 0.0 080310 691 0.9+ 0.8- 090928 926 0.4+ 0.3+
080302 291 0.2- 0.1- 080315 291 0.3- 0.0 090929 926 0.1+ 0.5-
080303 J95 0.2+ 1.2+ 080315 291 0.8+ 1.5+ 090929 926 0.8- 0.6-
080303 J95 0.2- 0.0 080315 691 0.1- 1.1- 090929 926 0.2+ 0.5+
Ephemeris:
2008 DH23 a,e,i = 1.66, 0.26, 28 q = 1.2271
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 09 26 04 12.83 +49 35.6 0.677 1.385 109.5 43.0 21.3
2009 10 06 04 39.16 +58 49.1 0.629 1.354 110.4 43.8 21.1
2009 10 16 05 15.71 +68 05.8 0.599 1.325 109.7 45.1 21.0
2009 10 26 06 19.16 +76 30.0 0.585 1.299 107.9 46.8 21.0
2009 11 05 08 44.47 +82 14.7 0.583 1.276 105.3 48.5 21.0
2009 11 15 12 24.66 +82 10.5 0.588 1.257 102.7 50.1 21.0
2009 11 25 14 15.54 +78 42.2 0.595 1.243 100.5 51.3 21.0
2009 12 05 15 02.57 +75 25.4 0.601 1.233 99.1 52.1 21.1
2009 12 15 15 26.12 +73 08.3 0.601 1.228 98.6 52.5 21.1
2009 12 25 15 36.76 +71 59.2 0.595 1.228 99.1 52.3 21.0
2010 01 04 15 36.02 +71 56.0 0.582 1.233 100.7 51.6 21.0
2010 01 14 15 20.55 +72 52.5 0.563 1.243 103.5 50.3 20.9
2010 01 24 14 40.47 +74 24.8 0.540 1.257 107.5 48.3 20.8
2010 02 03 13 22.62 +75 16.4 0.517 1.276 112.5 45.5 20.6
2010 02 13 11 40.45 +73 06.0 0.498 1.299 118.1 42.1 20.5
2010 02 23 10 22.93 +66 39.0 0.491 1.325 123.3 38.6 20.4
2010 03 05 09 42.38 +57 15.4 0.503 1.353 126.7 36.0 20.4
2010 03 15 09 24.73 +46 51.6 0.537 1.385 126.8 35.1 20.6
2010 03 25 09 19.65 +36 55.9 0.594 1.417 124.0 35.7 20.9
2010 04 04 09 21.70 +28 14.5 0.671 1.452 119.3 36.9 21.2
2010 04 14 09 28.05 +20 56.6 0.765 1.487 113.8 38.1 21.6
2010 04 24 09 37.27 +14 52.0 0.872 1.522 108.2 38.9 22.0
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-S137
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