MPEC 2018-A61 : 2012 BN1
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M.P.E.C. 2018-A61 Issued 2018 Jan. 14, 01:44 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
2012 BN1
Revision to MPEC 2012-B09
Additional Observations:
K12B01N C2018 01 12.27055 07 32 32.03 +28 24 28.5 19.4 GUEA061G96
K12B01N C2018 01 12.27580 07 32 28.43 +28 24 10.5 19.9 GUEA061G96
K12B01N C2018 01 12.28103 07 32 24.87 +28 23 52.4 19.9 GUEA061G96
K12B01N C2018 01 12.28626 07 32 21.28 +28 23 34.2 19.5 GUEA061G96
K12B01N C2018 01 12.34812 07 31 38.83 +28 19 53.7 19.4 GUEA061I52
K12B01N C2018 01 12.34853 07 31 38.54 +28 19 52.1 19.5 GUEA061I52
K12B01N C2018 01 12.34895 07 31 38.27 +28 19 50.7 19.5 GUEA061I52
K12B01N C2018 01 12.34936 07 31 37.97 +28 19 49.3 19.5 GUEA061I52
K12B01N (C2018 01 12.90887 07 26 07.98 +27 46 36.5 19.6 GUEA061G40
K12B01N (C2018 01 12.91366 07 26 04.95 +27 46 20.9 19.5 GUEA061G40
K12B01N KC2018 01 12.93530 07 25 46.41 +27 44 36.3 19.6 GUEA061204
K12B01N KC2018 01 12.94825 07 25 38.10 +27 43 51.2 UEA061204
K12B01N KC2018 01 12.96120 07 25 29.77 +27 43 05.8 UEA061204
K12B01N C2018 01 13.15085007 23 45.05 +27 32 04.4 19.7 GUEA061H01
K12B01N C2018 01 13.15667707 23 41.41 +27 31 45.6 19.7 GUEA061H01
K12B01N C2018 01 13.17000407 23 33.08 +27 31 02.2 19.6 GUEA061H01
K12B01N C2018 01 13.17306407 23 31.17 +27 30 52.2 19.8 GUEA061H01
K12B01N KC2018 01 13.20874 07 23 08.29 +27 29 04.2 oEA061711
K12B01N KC2018 01 13.21143 07 23 06.57 +27 28 55.3 oEA061711
K12B01N KC2018 01 13.21451 07 23 04.60 +27 28 45.1 oEA061711
K12B01N KC2018 01 13.92007 07 16 23.53 +26 46 55.2 19.2 UEA061K63
K12B01N KC2018 01 13.93166 07 16 16.58 +26 46 15.8 19.5 UEA061K63
K12B01N KC2018 01 13.93955 07 16 11.84 +26 45 48.6 19.5 UEA061K63
Observer details:
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector
+ CCD.
711 McDonald Observatory. Observer J. G. Ries. 2.1-m reflector + CCD + focal
reducer.
G40 Slooh.com Canary Islands Observatory. Observer K. Dankov. 0.5-m f/6.8
Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey. Observer D. C. Fuls. Measurers E. J. Christensen,
D. C. Fuls, A. R. Gibbs, A. D. Grauer, J. A. Johnson, R. A. Kowalski,
S. M. Larson, G. J. Leonard, R. G. Matheny, R. L. Seaman, F. C. Shelly.
1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro. Observers W. H. Ryan, E. V. Ryan.
Measurer W. H. Ryan. 2.4-m f/8.9 reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer R. G. Matheny.
Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. G. Matheny,
R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.40-m
f/3.2 Newtonian reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or integer in degrees), reference and Delta-T
180112 G96 19+ 2- 180113 K63 18+ 1- MPO227509 -1.0 day
Orbital elements:
2012 BN1 Earth MOID = 0.0310 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 348.79554 (2000.0) P Q
n 1.15046741 Peri. 24.51083 +0.77770789 +0.62529122
a 0.9020276 Node 296.62899 -0.58803251 +0.68726361
e 0.1856167 Incl. 4.14817 -0.22223456 +0.36970207
P 0.86 H 25.5 G 0.15 U 4
Residuals in seconds of arc
120116 F51 0.0 0.0 120124 F51 0.0 0.0 180112 204 0.1+ 0.0
120116 F51 0.0 0.0 120125 F51 0.1+ 0.1- 180112 204 0.3+ 0.0
120116 F51 0.1- 0.1- 120125 F51 0.1+ 0.1+ 180113 H01 0.0 0.1-
120118 G96 0.0 0.2+ 180112 G96 0.3- 0.2- 180113 H01 0.1- 0.0
120118 G96 0.3+ 0.2- 180112 G96 0.2- 0.0 180113 H01 0.0 0.1+
120118 G96 0.3+ 0.0 180112 G96 0.2+ 0.0 180113 H01 0.1+ 0.1+
120118 G96 0.2+ 0.0 180112 G96 0.3+ 0.0 180113 711 0.7- 0.1-
120119 G96 0.3- 0.2- 180112 I52 0.1+ 0.0 180113 711 0.8- 0.0
120119 G96 0.0 0.2+ 180112 I52 0.1- 0.1- 180113 711 0.8- 0.2+
120119 G96 0.0 0.1+ 180112 I52 0.2+ 0.0 180113 K63 0.3+ 0.4-
120119 G96 0.2+ 0.1- 180112 I52 0.1- 0.1+ 180113 K63 0.3+ 0.1-
120124 F51 0.0 0.1- 180112 G40 0.6+ 0.2+ 180113 K63 0.2+ 0.1-
120124 F51 0.2- 0.1+ 180112 G40 1.0+ 0.2+
120124 F51 0.0 0.1- 180112 204 0.3- 0.1+
Ephemeris:
2012 BN1 a,e,i = 0.90, 0.19, 4 q = 0.7346
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 12 15 13 13 48.6 +27 34 39 0.06674 0.9748 79.9 96.3 23.0
...
2017 12 30 10 40 51.9 +35 46 48 0.04874 1.0128 126.1 51.7 20.9
...
2018 01 07 08 38 00.4 +33 14 56 0.04954 1.0294 158.0 21.0 20.1
...
2018 01 13 07 25 06.6 +27 41 39 0.05690 1.0401 173.3 6.3 19.8
2018 01 14 07 15 38.1 +26 43 05 0.05862 1.0417 172.1 7.5 20.0
2018 01 15 07 06 53.4 +25 45 37 0.06048 1.0433 170.0 9.4 20.1
...
2018 01 21 06 27 37.6 +20 42 34 0.07377 1.0518 155.7 22.6 21.0
...
2018 01 29 06 00 07.6 +16 07 22 0.09547 1.0605 140.7 36.1 22.0
...
2018 02 13 05 45 58.2 +11 56 09 0.1415 1.0687 121.8 51.7 23.3
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-A61
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