MPEC 2018-A85 : 2018 AC4
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M.P.E.C. 2018-A85 Issued 2018 Jan. 15, 18:19 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 AC4
Observations:
K18A04C* C2018 01 13.32283 08 44 32.90 +19 28 05.1 20.3 GUEA085G96
K18A04C C2018 01 13.32796 08 44 26.19 +19 26 36.3 20.4 GUEA085G96
K18A04C C2018 01 13.33308 08 44 19.56 +19 25 07.3 UEA085G96
K18A04C C2018 01 13.33820 08 44 12.80 +19 23 37.9 20.4 GUEA085G96
K18A04C KC2018 01 13.36816 08 43 32.73 +19 15 00.0 oEA085711
K18A04C KC2018 01 13.37002 08 43 30.30 +19 14 27.6 oEA085711
K18A04C KC2018 01 13.37182 08 43 27.93 +19 13 55.3 oEA085711
K18A04C KC2018 01 13.37369 08 43 25.51 +19 13 23.3 oEA085711
K18A04C C2018 01 13.39362 08 43 00.72 +19 07 33.7 19.9 GUEA085I52
K18A04C C2018 01 13.39458 08 42 59.48 +19 07 17.0 19.9 GUEA085I52
K18A04C C2018 01 13.39555 08 42 58.19 +19 06 59.8 19.5 GUEA085I52
K18A04C C2018 01 13.39651 08 42 57.00 +19 06 43.2 20.0 GUEA085I52
K18A04C C2018 01 13.40707508 42 42.98 +19 03 35.8 20.1 GUEA085H01
K18A04C C2018 01 13.41160808 42 37.17 +19 02 17.2 20.1 GUEA085H01
K18A04C C2018 01 13.42316208 42 22.40 +18 58 56.9 20.0 GUEA085H01
K18A04C C2018 01 13.42784208 42 16.43 +18 57 35.9 20.5 GUEA085H01
K18A04C HC2018 01 14.04986 08 30 28.50 +16 07 53.4 UEA085204
K18A04C HC2018 01 14.07084 08 30 05.57 +16 02 28.3 20.4 GUEA085204
K18A04C C2018 01 14.25468 08 27 01.92 +15 16 24.0 20.7 GUEA085I52
K18A04C C2018 01 14.25564 08 27 00.91 +15 16 09.4 20.2 GUEA085I52
K18A04C C2018 01 14.25660 08 26 59.89 +15 15 55.3 20.1 GUEA085I52
K18A04C C2018 01 14.25756 08 26 58.92 +15 15 40.9 20.7 GUEA085I52
K18A04C C2018 01 14.27985608 26 35.17 +15 10 09.0 20.3 GUEA085H01
K18A04C C2018 01 14.29164808 26 22.85 +15 07 14.6 20.3 GUEA085H01
K18A04C C2018 01 14.29823808 26 15.99 +15 05 37.3 20.4 GUEA085H01
K18A04C C2018 01 14.30160908 26 12.48 +15 04 47.5 20.2 GUEA085H01
K18A04C KC2018 01 15.31001 08 11 13.07 +11 17 59.0 oEA085711
K18A04C KC2018 01 15.31220 08 11 11.24 +11 17 32.1 oEA085711
K18A04C KC2018 01 15.31403 08 11 09.74 +11 17 09.7 oEA085711
K18A04C KC2018 01 15.31614 08 11 07.95 +11 16 44.3 oEA085711
K18A04C C2018 01 15.32840 08 10 58.49 +11 14 10.7 19.9 GUEA085I52
K18A04C C2018 01 15.32936 08 10 57.69 +11 13 59.1 20.3 GUEA085I52
K18A04C C2018 01 15.33128 08 10 56.09 +11 13 35.3 UEA085I52
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.
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. Observers R. G. Matheny,
J. A. Johnson. 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.
Orbital elements:
2018 AC4 Earth MOID = 0.0088 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 313.44514 (2000.0) P Q
n 0.67489910 Peri. 87.15452 +0.85357842 -0.36447952
a 1.2871924 Node 293.97914 +0.13663482 +0.84612353
e 0.4507159 Incl. 24.04132 +0.50272737 +0.38888257
P 1.46 H 25.4 G 0.15 U 6
Residuals in seconds of arc
180113 G96 0.5- 0.7- 180113 I52 0.2+ 0.1- 180114 H01 0.3+ 0.1+
180113 G96 0.1- 0.0 180113 H01 0.1+ 0.1- 180114 H01 0.1+ 0.0
180113 G96 1.0+ 0.3+ 180113 H01 0.1+ 0.0 180114 H01 0.2+ 0.1+
180113 G96 0.3+ 0.2+ 180113 H01 0.2+ 0.0 180114 H01 0.2+ 0.0
180113 711 0.1- 0.6+ 180113 H01 0.1+ 0.0 180115 711 0.0 0.1-
180113 711 0.3- 0.6+ 180114 204 0.5+ 0.1+ 180115 711 0.0 0.1-
180113 711 0.8- 0.3- 180114 204 0.3+ 0.2- 180115 711 0.4+ 0.0
180113 711 0.7- 0.2+ 180114 I52 0.1- 0.1- 180115 711 0.1- 0.4+
180113 I52 0.1+ 0.2+ 180114 I52 0.2- 0.4- 180115 I52 0.2- 0.1+
180113 I52 0.1+ 0.2+ 180114 I52 0.4- 0.3- 180115 I52 0.3- 0.3+
180113 I52 0.5- 0.2- 180114 I52 0.1+ 0.5- 180115 I52 0.3- 0.1-
Ephemeris:
2018 AC4 a,e,i = 1.29, 0.45, 24 q = 0.7070
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 12 16 17 45 40.5 +24 30 02 0.2479 0.8384 47.9 119.4 26.8
...
2017 12 31 16 38 58.2 +37 00 37 0.1069 0.9459 66.6 107.5 24.4
...
2018 01 08 12 25 43.1 +46 43 16 0.05372 1.0067 114.4 62.8 21.3
...
2018 01 14 08 31 23.7 +16 22 02 0.07066 1.0526 167.2 12.0 20.5
2018 01 15 08 15 28.4 +12 24 03 0.07800 1.0603 168.7 10.5 20.7
2018 01 16 08 02 44.4 +09 06 22 0.08598 1.0679 167.7 11.3 20.9
...
2018 01 22 07 21 19.5 -01 55 04 0.1413 1.1134 154.5 22.3 22.5
...
2018 01 30 07 01 43.7 -07 00 13 0.2238 1.1730 143.7 29.8 23.8
...
2018 02 14 06 54 37.3 -09 08 05 0.3912 1.2798 131.3 35.4 25.4
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-A85
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