MPEC 2011-E14 : 2011 ET4
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M.P.E.C. 2011-E14 Issued 2011 Mar. 3, 03:12 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 https://www.minorplanetcenter.net/ ISSN 1523-6714
2011 ET4
Observations:
K11E04T* C2011 03 02.30120 12 14 32.17 +15 52 47.3 18.5 VrEE014703
K11E04T C2011 03 02.31367 12 14 26.37 +15 51 05.5 18.2 VrEE014703
K11E04T C2011 03 02.32619 12 14 20.54 +15 49 23.1 18.5 VrEE014703
K11E04T C2011 03 02.33876 12 14 14.67 +15 47 40.4 18.6 VrEE014703
K11E04T KC2011 03 02.35751512 14 04.96 +15 45 00.4 19.0 VoEE014H21
K11E04T IC2011 03 02.36399212 14 02.01 +15 44 06.5 oEE014H21
K11E04T KC2011 03 02.37048112 13 58.91 +15 43 13.9 18.9 VoEE014H21
K11E04T KC2011 03 02.37751512 13 55.66 +15 42 16.4 18.3 VoEE014H21
K11E04T KC2011 03 02.38807512 13 50.76 +15 40 48.9 18.2 VrEE014H21
K11E04T C2011 03 02.38898 12 13 51.27 +15 40 48.2 18.2 VrEE014703
K11E04T C2011 03 02.38957 12 13 50.98 +15 40 43.6 18.4 VrEE014703
K11E04T C2011 03 02.39014 12 13 50.70 +15 40 39.0 18.1 VrEE014703
K11E04T KC2011 03 02.39032512 13 49.72 +15 40 30.4 18.3 VrEE014H21
K11E04T C2011 03 02.39072 12 13 50.41 +15 40 34.2 18.4 VrEE014703
K11E04T KC2011 03 02.39253112 13 48.69 +15 40 12.1 18.2 VrEE014H21
K11E04T KC2011 03 02.39455712 13 47.78 +15 39 55.1 18.1 VrEE014H21
K11E04T KC2011 03 02.39698912 13 46.62 +15 39 35.3 18.2 VrEE014H21
K11E04T KC2011 03 02.43806 12 13 28.21 +15 34 04.6 18.4 RrEE014H10
K11E04T KC2011 03 02.44004 12 13 27.39 +15 33 48.8 18.2 RrEE014H10
K11E04T KC2011 03 02.44203 12 13 26.30 +15 33 31.3 18.4 RrEE014H10
K11E04T KC2011 03 02.46174 12 13 17.18 +15 30 49.2 18.0 RrEE014H10
K11E04T KC2011 03 02.46374 12 13 16.52 +15 30 36.0 18.2 RrEE014H10
K11E04T KC2011 03 02.46575 12 13 15.27 +15 30 15.8 18.4 RrEE014H10
K11E04T tC2011 03 02.52712 12 12 47.13 +15 21 48.4 19.1 VoEE014291
K11E04T tC2011 03 02.53129 12 12 45.25 +15 21 13.6 19.1 VoEE014291
K11E04T tC2011 03 02.53544 12 12 43.32 +15 20 39.6 19.0 VoEE014291
K11E04T C2011 03 02.70966 12 11 28.82 +14 56 34.5 16.9 VcEE014C42
K11E04T C2011 03 02.71241 12 11 27.56 +14 56 11.9 17.6 VcEE014C42
K11E04T C2011 03 02.71514 12 11 26.30 +14 55 49.8 17.2 VcEE014C42
K11E04T KC2011 03 02.83777 12 10 31.65 +14 38 45.2 18.2 RrEE014A17
K11E04T KC2011 03 02.84011 12 10 30.56 +14 38 25.2 18.0 RrEE014A17
K11E04T KC2011 03 02.84246 12 10 29.52 +14 38 05.7 18.3 RrEE014A17
K11E04T KC2011 03 02.88300 12 10 10.89 +14 32 30.3 17.9 RrEE014113
K11E04T KC2011 03 02.88382 12 10 10.51 +14 32 23.6 18.2 RrEE014113
K11E04T KC2011 03 02.88464 12 10 10.14 +14 32 16.9 17.9 RrEE014113
K11E04T KC2011 03 02.88545 12 10 09.76 +14 32 10.0 18.2 RrEE014113
K11E04T KC2011 03 02.91536912 09 56.21 +14 28 03.4 18.4 VuEE014198
K11E04T KC2011 03 02.91636712 09 55.74 +14 27 55.1 18.5 VuEE014198
K11E04T KC2011 03 02.91899212 09 54.55 +14 27 33.6 18.5 VuEE014198
K11E04T C2011 03 02.95146 12 09 39.98 +14 23 08.0 18.4 RvEE014586
K11E04T C2011 03 02.95230 12 09 39.56 +14 23 00.4 18.6 RvEE014586
K11E04T C2011 03 02.95469 12 09 38.48 +14 22 40.6 18.4 RvEE014586
K11E04T C2011 03 02.95488 12 09 38.38 +14 22 38.8 18.3 RvEE014586
K11E04T C2011 03 02.95508 12 09 38.29 +14 22 37.3 18.3 RvEE014586
K11E04T C2011 03 02.95528 12 09 38.20 +14 22 35.6 18.2 RvEE014586
K11E04T C2011 03 02.95547 12 09 38.11 +14 22 33.9 18.3 RvEE014586
K11E04T C2011 03 02.95567 12 09 38.02 +14 22 32.3 18.3 RvEE014586
K11E04T C2011 03 02.95587 12 09 37.93 +14 22 30.6 18.3 RvEE014586
K11E04T C2011 03 02.95606 12 09 37.84 +14 22 29.1 18.3 RvEE014586
K11E04T KC2011 03 02.95759 12 09 36.66 +14 22 11.4 18.6 VuEE014510
K11E04T KC2011 03 02.96383 12 09 33.83 +14 21 19.7 18.8 VuEE014510
K11E04T KC2011 03 02.97007 12 09 30.96 +14 20 28.0 19.0 VuEE014510
K11E04T KC2011 03 02.97631 12 09 28.01 +14 19 37.0 18.9 VuEE014510
K11E04T KC2011 03 02.98255 12 09 25.18 +14 18 44.1 18.9 VuEE014510
Observer details:
113 Volkssternwarte Drebach, Schoenbrunn. Observer G. Lehmann. 0.5-m f/6.7
reflector + CCD.
198 Wildberg. Observer R. Apitzsch. 0.35-m f/4.2 reflector + CCD.
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
510 Siegen. Observers M. Jung, H. Bill. Measurer H. Bill. 0.43-m f/4.5
reflector + CCD.
586 Pic du Midi. Observers M. Birlan, F. Colas, M. Popescu. Measurers
M. Popescu, M. Birlan. 1.05-m f/12.7 reflector + CCD.
703 Catalina Sky Survey. Observer R. A. Kowalski. Measurers J. D. Ahern,
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. 0.68-m Schmidt
+ CCD.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6 Schmidt-Cassegrain + CCD.
C42 Xingming Observatory, Mt. Nanshan. Observer X. Gao. 0.36-m f/6.9
Schmidt-Cassegrain + CCD.
H10 Tzec Maun Observatory, Mayhill. Observers S. Baroni, L. Buzzi, P. Concari,
S. Foglia, G. Galli, M. Tombelli. 0.18-m f/7.32 refractor + CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers S. Foglia, T. Vorobjov. 0.61-m f/4.0 astrograph + CCD, 0.76-m
f/6.65 Ritchey-Chretien + CCD.
Orbital elements:
2011 ET4 Earth MOID = 0.1809 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC
M 2.68404 (2000.0) P Q
n 0.47283683 Peri. 149.75132 -0.75257634 -0.64883133
a 1.6317809 Node 347.67763 +0.44731051 -0.37837178
e 0.3011313 Incl. 31.79976 +0.48326201 -0.66019142
P 2.08 H 21.0 G 0.15 U 8
Residuals in seconds of arc
110302 703 0.5- 0.5+ 110302 H10 2.2+ 1.5+ 110302 198 0.2+ 0.0
110302 703 0.4- 0.4+ 110302 H10 0.2- 0.4+ 110302 198 0.1+ 0.1-
110302 703 0.4- 0.3+ 110302 H10 0.2+ 1.1+ 110302 198 0.3+ 0.2+
110302 703 0.5- 0.4+ 110302 H10 (4.1+ 4.4+) 110302 586 0.2+ 0.8+
110302 H21 0.3+ 0.3- 110302 H10 0.5- 0.8+ 110302 586 0.3- 0.2+
110302 H21 1.1+ 1.0- 110302 291 0.4- 0.0 110302 586 0.1+ 0.2+
110302 H21 0.1- 0.2- 110302 291 0.2+ 0.2- 110302 586 0.1- 0.0
110302 H21 0.1+ 0.2+ 110302 291 0.2- 0.2+ 110302 586 0.1- 0.1+
110302 H21 0.1+ 0.4- 110302 C42 0.0 0.0 110302 586 0.0 0.1+
110302 703 0.1+ 0.2- 110302 C42 0.2+ 0.1+ 110302 586 0.1- 0.0
110302 703 0.1- 0.1+ 110302 C42 0.2+ 0.5+ 110302 586 0.0 0.0
110302 703 0.3- 0.2+ 110302 A17 0.1+ 0.5+ 110302 586 0.0 0.0
110302 H21 0.1+ 0.4- 110302 A17 0.3- 0.2- 110302 586 0.0 0.1+
110302 703 0.6- 0.1+ 110302 A17 0.1+ 0.3- 110302 510 0.5- 0.2-
110302 H21 0.0 0.5- 110302 113 0.1+ 0.3- 110302 510 0.2+ 0.1-
110302 H21 0.4+ 0.8- 110302 113 0.0 0.3- 110302 510 0.4+ 0.1+
110302 H21 0.1- 0.6- 110302 113 0.1+ 0.2- 110302 510 0.6- 0.9+
110302 H10 0.8+ 0.9+ 110302 113 0.0 0.4- 110302 510 0.2+ 0.1-
Ephemeris:
2011 ET4 a,e,i = 1.63, 0.30, 32 q = 1.1404
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2011 02 01 14 39 13.8 +48 13 57 0.3674 1.1405 105.6 56.3 21.2
...
2011 02 16 13 47 28.0 +38 54 34 0.2562 1.1468 122.7 46.4 20.1
...
2011 02 24 12 59 57.6 +28 29 10 0.2088 1.1563 139.5 33.8 19.3
...
2011 03 02 12 16 46.6 +16 34 02 0.1879 1.1660 156.8 19.5 18.7
2011 03 03 12 09 16.9 +14 16 54 0.1862 1.1679 160.0 16.9 18.6
2011 03 04 12 01 46.6 +11 56 29 0.1850 1.1698 163.2 14.2 18.5
...
2011 03 10 11 18 06.7 -02 14 01 0.1905 1.1823 173.4 5.6 18.2
...
2011 03 18 10 29 40.1 -17 21 15 0.2272 1.2021 153.1 22.0 19.2
...
2011 04 02 09 38 04.2 -31 02 41 0.3459 1.2471 129.2 38.4 20.7
Carl W. Hergenrother (C) Copyright 2011 MPC M.P.E.C. 2011-E14
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