MPEC 2007-T81 : 2007 TY18 = 1997 GF45
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M.P.E.C. 2007-T81 Issued 2007 Oct. 12, 13:25 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 TY18 = 1997 GF45
Revision to MPEC 2007-T72
Observations:
K07T18Y* C2007 10 09.42775 03 40 24.95 +27 39 12.2 19.8 V ET081691
K07T18Y C2007 10 09.44542 03 40 23.90 +27 39 17.6 19.9 V ET081691
K07T18Y C2007 10 09.46311 03 40 22.89 +27 39 23.7 20.5 V ET081691
K07T18Y C2007 10 10.24987403 39 39.29 +27 43 37.4 20.3 V ET081H55
K07T18Y C2007 10 10.26117503 39 38.63 +27 43 41.7 20.3 V ET081H55
K07T18Y C2007 10 10.26843803 39 38.20 +27 43 44.1 20.3 V ET081H55
K07T18Y C2007 10 10.41468 03 39 29.52 +27 44 31.6 19.8 V ET081G96
K07T18Y C2007 10 10.42058 03 39 29.16 +27 44 33.5 20.1 V ET081G96
K07T18Y C2007 10 10.42650 03 39 28.80 +27 44 35.3 20.1 V ET081G96
K07T18Y C2007 10 10.43245 03 39 28.44 +27 44 37.1 20.4 V ET081G96
K07T18Y C2007 10 11.32675603 38 35.79 +27 49 12.6 20.3 V ET081H55
K07T18Y C2007 10 11.32975203 38 35.59 +27 49 14.1 19.9 V ET081H55
K07T18Y C2007 10 11.33347303 38 35.38 +27 49 15.8 20.2 V ET081H55
K07T18Y C2007 10 11.37985 03 38 32.71 +27 49 31.1 ET081701
K07T18Y C2007 10 11.40207 03 38 31.22 +27 49 37.5 ET081701
K07T18Y C2007 10 11.40296 03 38 31.18 +27 49 38.0 20.8 R ET081926
K07T18Y C2007 10 11.40637 03 38 30.93 +27 49 38.7 ET081926
K07T18Y C2007 10 11.40977 03 38 30.72 +27 49 39.9 ET081926
K07T18Y C2007 10 11.42429 03 38 29.76 +27 49 44.8 ET081701
K07T18Y C2007 10 11.44249 03 38 28.64 +27 49 49.6 20.1 V ET081G96
K07T18Y C2007 10 11.44540 03 38 28.42 +27 49 50.5 20.1 V ET081G96
K07T18Y C2007 10 11.44652 03 38 28.36 +27 49 51.0 ET081701
K07T18Y C2007 10 11.44832 03 38 28.24 +27 49 51.3 20.1 V ET081G96
K07T18Y C2007 10 11.45128 03 38 28.06 +27 49 52.2 20.1 V ET081G96
K07T18Y C2007 10 11.49510 03 38 25.22 +27 50 04.9 20.3 V ET081291
K07T18Y C2007 10 11.49931 03 38 24.95 +27 50 06.1 20.4 V ET081291
K07T18Y C2007 10 11.50414 03 38 24.64 +27 50 07.4 20.4 V ET081291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
691 Steward Observatory, Kitt Peak. Observer J. V. Scotti. 0.9-m f/3
reflector + CCD.
701 Junk Bond Observatory, Sierra Vista. Observer D. Healy. 0.81-m f/4.4
Ritchey-Chretien + CCD.
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. Measurer
P. R. Holvorcem. 0.81-m f/7 Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers E. Beshore, R. E. Hill. Measurers
E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer,
R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught. 1.5-m reflector
+ CCD.
H55 Astronomical Research Observatory, Charleston. Observer R. Holmes.
Measurers R. Holmes, H. Devore. 0.61-m f/4.0 astrograph + CCD, 0.81-m
f/4.0 astrograph + CCD.
Orbital elements:
2007 TY18 = 1997 GF45 Earth MOID = 0.2898 AU
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 MPC
M 49.07611 (2000.0) P Q
n 0.31169575 Peri. 301.48184 +0.61113943 +0.79137591
a 2.1543461 Node 6.25638 -0.67040851 +0.52777698
e 0.4094732 Incl. 8.04770 -0.42078620 +0.30850547
P 3.16 H 18.7 G 0.15 U 5
Residuals in seconds of arc
970408 691 0.1+ 1.1- 071010 H55 0.0 0.5+ 071011 926 0.0 0.2-
970408 691 0.1+ 0.2- 071010 G96 0.1+ 0.1- 071011 926 0.1+ 0.0
970408 691 0.0 0.4- 071010 G96 0.1+ 0.0 071011 701 0.1- 0.5+
970409 691 0.4+ 0.2+ 071010 G96 0.2+ 0.1- 071011 G96 0.5+ 0.1+
970409 691 0.2+ 0.6+ 071010 G96 0.3+ 0.2- 071011 G96 0.0 0.1+
970409 691 0.8- 1.0+ 071011 H55 0.1- 0.9- 071011 701 0.3+ 0.1+
071009 691 0.1- 0.3+ 071011 H55 0.2- 0.3- 071011 G96 0.1+ 0.0
071009 691 0.3- 0.1- 071011 H55 0.1+ 0.3+ 071011 G96 0.3+ 0.1+
071009 691 0.1+ 0.2+ 071011 701 1.1+ 0.3+ 071011 291 0.1- 0.1-
071010 H55 0.3- 0.1- 071011 701 0.3+ 0.1- 071011 291 0.2- 0.1-
071010 H55 0.1- 0.5+ 071011 926 0.4+ 0.1+ 071011 291 0.2- 0.2-
Ephemeris:
2007 TY18 a,e,i = 2.15, 0.41, 8 q = 1.2722
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2007 10 07 03 42.48 +27 25.1 0.925 1.766 133.1 24.4 20.9
2007 10 17 03 32.17 +28 13.7 0.913 1.819 144.6 18.5 20.8
2007 10 27 03 18.02 +28 34.4 0.918 1.871 156.4 12.3 20.6
2007 11 06 03 02.16 +28 25.1 0.945 1.924 166.6 6.9 20.5
2007 11 16 02 47.10 +27 50.7 0.998 1.975 167.6 6.2 20.7
2007 11 26 02 34.98 +27 02.8 1.075 2.026 158.6 10.2 21.0
2007 12 06 02 26.90 +26 13.5 1.175 2.076 147.8 14.7 21.5
2007 12 16 02 23.13 +25 32.3 1.295 2.125 137.2 18.3 21.8
Timothy B. Spahr (C) Copyright 2007 MPC M.P.E.C. 2007-T81
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