MPEC 2021-C279 : 2018 AT
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M.P.E.C. 2021-C279 Issued 2021 February 13, 15:02 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F 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
2018 AT
Revision to MPEC 2018-A31
Additional Observations:
K18A00T C2016 01 21.43912610 55 06.369+26 01 40.36 21.89GVEC279F51
K18A00T C2016 01 21.45332610 55 05.029+26 01 45.35 22.70GVEC279F51
K18A00T C2016 01 21.46756010 55 03.728+26 01 49.46 22.46GVEC279F51
K18A00T C2016 01 21.48163110 55 02.388+26 01 53.50 21.74GVEC279F51
K18A00T C2016 01 30.43006010 39 42.799+26 42 44.98 21.75GVEC279F51
K18A00T C2016 01 30.44277210 39 41.242+26 42 47.79 20.47GVEC279F51
K18A00T C2016 01 30.45575110 39 39.744+26 42 50.98 21.59GVEC279F51
K18A00T C2016 01 30.46843910 39 38.215+26 42 54.06 22.16GVEC279F51
K18A00T C2016 02 10.38200310 17 29.762+27 09 58.80 22.40GVEC279F51
K18A00T C2016 02 10.39297810 17 28.354+27 09 59.48 22.34GVEC279F51
K18A00T C2016 02 10.41499910 17 25.497+27 10 00.82 21.92GVEC279F51
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m 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
160121 F51 0.11+ 0.12+ 160210 F51 0.14+ 0.11+ MPO438048 -0.26 days
Orbital elements:
2018 AT PHA, Earth MOID = 0.0288 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 155.70547 (2000.0) P Q
n 0.44838495 Peri. 21.47796 +0.95425932 -0.29849440
a 1.6905786 Node 355.77764 +0.22936408 +0.76742764
e 0.3991239 Incl. 13.37910 +0.19178446 +0.56741159
P 2.20 H 20.6 G 0.15 U 2
Residuals in seconds of arc
160121 F51 0.2- 0.2- 180106 H01 0.0 0.0 180115 T12 0.0 0.1-
160121 F51 0.4- 0.3+ 180106 H01 0.1- 0.1+ 180115 T12 0.0 0.1-
160121 F51 0.1+ 0.1- 180106 H01 0.1- 0.1+ 180115 T12 0.0 0.0
160121 F51 0.2- 0.4- 180106 H01 0.1+ 0.0 180115 T12 0.0 0.0
160130 F51 0.5+ 0.3+ 180106 I52 0.6+ 0.6- 180115 T12 0.1- 0.0
160130 F51 0.3- 0.0 180106 I52 0.6+ 0.2+ 180115 T12 0.0 0.1-
160130 F51 0.1+ 0.0 180106 I52 0.9+ 0.1+ 180115 T12 0.2- 0.0
160130 F51 0.3- 0.0 180107 H21 0.4+ 0.1+ 180115 T12 0.1+ 0.0
160210 F51 0.0 0.1- 180107 H21 0.3+ 0.3+ 180117 T14 0.0 0.0
160210 F51 0.2+ 0.1- 180107 H21 0.1+ 0.3+ 180117 T14 0.0 0.0
160210 F51 0.2+ 0.1- 180108 G96 0.8+ 0.0 180117 T14 0.0 0.0
180105 G96 0.4- 0.1- 180108 G96 0.5+ 0.1- 180117 T14 0.0 0.0
180105 G96 0.0 0.4- 180108 G96 0.7+ 0.0 180117 T14 0.0 0.0
180105 G96 0.1- 0.0 180108 G96 0.9+ 0.3+ 180117 T14 0.0 0.0
180105 G96 0.2- 0.2+ 180115 T12 0.0 0.0 180204 695 0.0 0.2+
180105 G96 1.0- 0.2+ 180115 T12 0.0 0.0 180204 695 0.0 0.2+
180105 G96 0.4- 0.2- 180115 T12 0.0 0.0 180204 695 0.0 0.2+
180105 G96 0.2+ 0.4+ 180115 T12 0.0 0.0 180213 T12 0.0 0.0
180105 695 0.0 0.4+ 180115 T12 0.0 0.0 180213 T12 0.0 0.0
180105 695 0.0 0.1+ 180115 T12 0.0 0.0
180105 695 0.0 0.2+ 180115 T12 0.1+ 0.0
Ephemeris:
2018 AT a,e,i = 1.69, 0.40, 13 q = 1.0158
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 14 14 07 40.3 -16 47 46 2.3522 2.3581 78.3 24.1 25.4
...
2021 01 29 14 20 27.8 -19 03 29 2.1510 2.3640 89.9 24.6 25.3
...
2021 02 06 14 25 33.4 -20 11 33 2.0416 2.3652 96.5 24.5 25.2
...
2021 02 12 14 28 24.4 -21 00 26 1.9599 2.3652 101.6 24.1 25.1
2021 02 13 14 28 47.5 -21 08 23 1.9463 2.3652 102.5 24.1 25.0
2021 02 14 14 29 09.0 -21 16 17 1.9328 2.3651 103.4 24.0 25.0
...
2021 02 20 14 30 42.4 -22 02 18 1.8526 2.3641 108.8 23.3 24.9
...
2021 02 28 14 31 04.1 -22 59 41 1.7492 2.3616 116.3 22.1 24.7
...
2021 03 15 14 25 40.4 -24 30 36 1.5728 2.3533 131.6 18.4 24.4
A. U. Tomatic (C) Copyright 2021 MPC M.P.E.C. 2021-C279
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