MPEC 2018-A91 : 2018 AA4
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M.P.E.C. 2018-A91 Issued 2018 Jan. 15, 18:43 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 AA4
Observations:
K18A04A* C2018 01 13.29675 08 49 48.24 +11 50 01.4 UEA091703
K18A04A C2018 01 13.30203 08 49 55.57 +11 51 08.6 18.7 GUEA091703
K18A04A C2018 01 13.30730 08 50 02.68 +11 52 12.9 18.3 GUEA091703
K18A04A C2018 01 13.31258 08 50 09.87 +11 53 18.2 18.5 GUEA091703
K18A04A C2018 01 13.36307 08 51 16.87 +12 03 24.0 18.7 GUEA091I52
K18A04A C2018 01 13.36320 08 51 17.02 +12 03 25.7 18.5 GUEA091I52
K18A04A C2018 01 13.36332 08 51 17.18 +12 03 27.0 18.5 GUEA091I52
K18A04A C2018 01 13.36344 08 51 17.34 +12 03 28.5 18.0 GUEA091I52
K18A04A KC2018 01 13.38428 08 51 41.72 +12 07 42.6 oEA091711
K18A04A KC2018 01 13.38594 08 51 43.90 +12 08 01.7 oEA091711
K18A04A KC2018 01 13.38767 08 51 46.08 +12 08 21.1 oEA091711
K18A04A KC2018 01 13.39004 08 51 49.09 +12 08 48.2 oEA091711
K18A04A C2018 01 13.41333708 52 20.67 +12 12 53.0 18.1 GUEA091H01
K18A04A C2018 01 13.41779708 52 26.41 +12 13 43.3 18.3 GUEA091H01
K18A04A C2018 01 13.42933508 52 41.23 +12 15 52.6 18.2 GUEA091H01
K18A04A C2018 01 13.43822908 52 52.65 +12 17 31.6 18.3 GUEA091H01
K18A04A KC2018 01 13.98536 09 04 24.69 +13 46 20.1 18.6 RqEA091160
K18A04A KC2018 01 13.98753 09 04 26.83 +13 46 38.8 18.3 RqEA091160
K18A04A KC2018 01 13.98861 09 04 27.86 +13 46 48.8 18.9 RqEA091160
K18A04A KC2018 01 13.98970 09 04 28.93 +13 46 58.7 qEA091160
K18A04A KC2018 01 13.99185 09 04 31.06 +13 47 17.0 qEA091160
K18A04A KC2018 01 13.99587 09 04 35.11 +13 47 48.8 18.9 UEA091K63
K18A04A KC2018 01 14.00078 09 04 39.93 +13 48 30.9 18.8 UEA091K63
K18A04A KC2018 01 14.00474 09 04 43.80 +13 49 05.1 18.8 UEA091K63
K18A04A KC2018 01 14.18004 09 07 30.39 +14 12 18.3 19.1 GUEA091204
K18A04A KC2018 01 14.18729 09 07 37.19 +14 13 12.7 UEA091204
K18A04A KC2018 01 14.19434 09 07 43.81 +14 14 05.2 UEA091204
K18A04A C2018 01 14.31425 09 10 00.15 +14 30 35.6 18.9 GUEA091G96
K18A04A C2018 01 14.32456 09 10 08.73 +14 31 52.2 19.1 GUEA091G96
K18A04A C2018 01 14.32971 09 10 12.99 +14 32 30.0 18.7 GUEA091G96
K18A04A KC2018 01 14.39223 09 11 01.55 +14 40 07.2 oEA091711
K18A04A KC2018 01 14.39388 09 11 02.79 +14 40 18.6 oEA091711
K18A04A KC2018 01 14.39574 09 11 04.27 +14 40 31.7 oEA091711
K18A04A C2018 01 14.39582 09 11 06.62 +14 40 24.0 19.1 GUEA091I52
K18A04A C2018 01 14.39600 09 11 06.76 +14 40 25.4 18.8 GUEA091I52
K18A04A C2018 01 14.39618 09 11 06.91 +14 40 26.9 18.7 GUEA091I52
K18A04A C2018 01 14.39636 09 11 07.06 +14 40 28.0 19.0 GUEA091I52
K18A04A KC2018 01 14.39761 09 11 05.81 +14 40 44.6 oEA091711
K18A04A KC2018 01 14.91158 09 18 25.30 +15 33 00.6 18.6 RqEA091A17
K18A04A KC2018 01 14.92336 09 18 33.41 +15 34 09.2 19.2 RqEA091A17
K18A04A KC2018 01 14.93511 09 18 41.35 +15 35 18.2 18.8 RqEA091A17
K18A04A KC2018 01 14.95081609 18 59.706+15 38 00.50 19.1 GUEA091J04
K18A04A KC2018 01 14.95255609 19 00.886+15 38 10.60 18.9 GUEA091J04
K18A04A KC2018 01 14.95430109 19 02.052+15 38 20.78 19.5 GUEA091J04
K18A04A KC2018 01 15.01978 09 19 34.53 +15 43 22.7 19.2 RoEA091K88
K18A04A KC2018 01 15.02231 09 19 36.10 +15 43 36.1 19.1 RoEA091K88
K18A04A KC2018 01 15.02483 09 19 37.73 +15 43 50.3 19.0 RoEA091K88
K18A04A C2018 01 15.36035 09 23 26.73 +16 13 10.9 19.6 GUEA091703
K18A04A C2018 01 15.36575 09 23 29.67 +16 13 37.7 19.6 GUEA091703
K18A04A C2018 01 15.37702 09 23 35.64 +16 14 31.2 18.4 GUEA091703
K18A04A C2018 01 15.38519 09 23 40.30 +16 15 11.3 19.8 VoEA091691
K18A04A C2018 01 15.39256 09 23 44.22 +16 15 45.6 19.7 VoEA091691
K18A04A C2018 01 15.40002 09 23 48.17 +16 16 20.1 19.9 VoEA091691
Observer details:
160 Castelmartini. Observers M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann.
Measurer E. Prosperi. 0.35-m f/10 Schmidt-Cassegrain + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.60-m f/4.64 reflector
+ CCD.
691 Steward Observatory, Kitt Peak. Observer M. T. Read. 0.9-m f/3 reflector
+ CCD.
703 Catalina Sky Survey. Observer 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.
0.68-m Schmidt + 10K CCD.
711 McDonald Observatory. Observer J. G. Ries. 2.1-m reflector + CCD + focal
reducer.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6 Schmidt-Cassegrain + CCD.
G96 Mt. Lemmon Survey. Observer A. R. Gibbs. 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.
J04 ESA Optical Ground Station, Tenerife. Observer P. Ruiz. Measurers
M. Micheli, D. Koschny, M. Busch, E. Schwab, A. Knoefel. 1.0-m f/4.4
reflector + CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.40-m
f/3.2 Newtonian reflector + CCD.
K88 GINOP-KHK, Piszkesteto. Observer K. Sarneczky. 0.60-m Schmidt + CCD.
Orbital elements:
2018 AA4 Earth MOID = 0.0077 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 333.56372 (2000.0) P Q
n 0.25255149 Peri. 322.55294 +0.20916054 -0.97637301
a 2.4787692 Node 115.31576 +0.91108878 +0.17440671
e 0.6236723 Incl. 3.44324 +0.35520291 +0.12758544
P 3.90 H 25.9 G 0.15 U 5
Residuals in seconds of arc
180113 703 1.1- 1.7- 180113 160 0.3- 0.7+ 180114 I52 0.1- 0.0
180113 703 0.9+ 0.2+ 180113 160 0.3- 1.2+ 180114 711 0.5- 0.2+
180113 703 0.3+ 0.4- 180113 160 0.0 1.0+ 180114 A17 1.2+ 0.5-
180113 703 1.1+ 0.2+ 180113 K63 0.3+ 0.3- 180114 A17 1.2+ 1.0-
180113 I52 0.3+ 0.2- 180114 K63 0.6+ 0.3- 180114 A17 0.2+ 0.4-
180113 I52 0.0 0.0 180114 K63 0.7+ 0.1+ 180114 J04 1.1+ 0.0
180113 I52 0.1+ 0.1- 180114 204 0.7- 0.5- 180114 J04 1.1+ 0.2-
180113 I52 0.1+ 0.0 180114 204 0.9- 0.5- 180114 J04 0.9+ 0.3-
180113 711 0.7+ 0.7+ 180114 204 1.0- 0.6- 180115 K88 0.2+ 0.2-
180113 711 1.1+ 0.7+ 180114 G96 0.4+ 0.0 180115 K88 0.4- 0.4-
180113 711 0.2+ 0.2+ 180114 G96 0.4+ 0.1+ 180115 K88 0.0 0.2+
180113 711 0.7- 0.1+ 180114 G96 0.4+ 0.1- 180115 703 0.5- 0.7-
180113 H01 0.6- 0.1- 180114 711 0.3+ 0.1+ 180115 703 0.0 0.4+
180113 H01 0.7- 0.1- 180114 711 0.9- 0.1+ 180115 703 1.0- 0.6+
180113 H01 0.9- 0.1- 180114 711 1.1- 0.3+ 180115 691 0.1- 0.3+
180113 H01 0.8- 0.0 180114 I52 0.2- 0.2- 180115 691 0.2- 0.3+
180113 160 0.1+ 0.1+ 180114 I52 0.3- 0.1- 180115 691 0.3- 0.2+
180113 160 0.1+ 0.0 180114 I52 0.2- 0.2+
Ephemeris:
2018 AA4 a,e,i = 2.48, 0.62, 3 q = 0.9328
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 12 16 22 27 11.2 -24 12 17 0.1536 0.9331 66.3 105.0 25.6
...
2017 12 31 22 56 57.1 -25 25 28 0.06301 0.9514 58.0 118.8 24.5
...
2018 01 08 00 56 11.3 -30 34 34 0.01604 0.9793 74.9 104.2 20.7
...
2018 01 14 09 04 34.5 +13 51 12 0.02544 1.0074 158.8 20.6 19.0
2018 01 15 09 19 20.0 +15 44 00 0.03129 1.0126 157.2 22.1 19.5
2018 01 16 09 29 29.4 +16 59 09 0.03727 1.0179 156.2 23.0 19.9
...
2018 01 22 09 54 50.6 +20 03 46 0.07430 1.0528 156.7 21.7 21.4
...
2018 01 30 10 02 45.2 +21 14 04 0.1261 1.1058 162.3 15.7 22.5
...
2018 02 14 10 03 06.4 +21 39 45 0.2344 1.2195 170.9 7.4 23.7
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-A91
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