MPEC 2018-R121: 2018 RA4
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M.P.E.C. 2018-R121 Issued 2018 Sept. 11, 16:53 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 RA4
Observations:
K18R04A* C2018 09 10.18353 21 52 02.69 -07 05 52.5 19.7 GVER121703
K18R04A C2018 09 10.18880 21 52 06.03 -07 04 53.4 19.0 GVER121703
K18R04A C2018 09 10.19406 21 52 09.40 -07 03 53.5 19.2 GVER121703
K18R04A C2018 09 10.19933 21 52 12.81 -07 02 54.5 19.2 GVER121703
K18R04A C2018 09 10.34747 21 53 46.60 -06 35 10.2 18.8 GVER121I52
K18R04A C2018 09 10.34766 21 53 46.72 -06 35 07.8 19.1 GVER121I52
K18R04A C2018 09 10.34785 21 53 46.86 -06 35 06.1 19.3 GVER121I52
K18R04A C2018 09 10.34804 21 53 47.00 -06 35 04.0 19.1 GVER121I52
K18R04A KC2018 09 10.84815921 59 22.76 -05 04 48.3 19.5 GVER121L01
K18R04A IC2018 09 10.85021221 59 24.00 -05 04 26.3 19.3 GVER121L01
K18R04A KC2018 09 10.85224721 59 25.21 -05 04 04.8 19.4 GVER121L01
K18R04A KC2018 09 10.85419 21 59 26.77 -05 03 42.3 18.8 VER121104
K18R04A KC2018 09 10.85430121 59 26.45 -05 03 43.5 19.5 GVER121L01
K18R04A KC2018 09 10.85838 21 59 29.27 -05 02 57.9 18.7 VER121104
K18R04A KC2018 09 10.85926 21 59 29.71 -05 02 49.5 18.4 RqER121K63
K18R04A KC2018 09 10.86257 21 59 31.76 -05 02 13.6 VER121104
K18R04A KC2018 09 10.86313 21 59 32.02 -05 02 08.9 19.0 RqER121K63
K18R04A KC2018 09 10.86603 21 59 33.90 -05 01 37.1 18.7 RqER121K63
K18R04A KC2018 09 10.88500 21 59 45.38 -04 58 19.7 19.3 GVER121204
K18R04A KC2018 09 10.89164 21 59 49.35 -04 57 09.4 VER121204
K18R04A KC2018 09 10.89858 21 59 53.49 -04 55 56.0 VER121204
K18R04A KC2018 09 10.90035 21 59 53.97 -04 55 37.1 18.9 GVER121595
K18R04A KC2018 09 10.90650 21 59 57.71 -04 54 32.7 19.0 GVER121595
K18R04A KC2018 09 10.91265 22 00 01.37 -04 53 27.6 19.2 GVER121595
K18R04A C2018 09 11.11572 22 02 15.01 -04 17 43.2 18.7 G ER121I52
K18R04A C2018 09 11.11590 22 02 15.15 -04 17 41.7 18.4 G ER121I52
K18R04A C2018 09 11.11609 22 02 15.26 -04 17 40.0 19.2 G ER121I52
K18R04A C2018 09 11.11628 22 02 15.42 -04 17 37.7 19.2 G ER121I52
K18R04A KC2018 09 11.45926 22 05 39.53 -03 16 57.6 18.6 RVER121474
K18R04A KC2018 09 11.46016 22 05 40.02 -03 16 48.6 18.5 RVER121474
K18R04A KC2018 09 11.46107 22 05 40.54 -03 16 39.5 18.5 RVER121474
K18R04A KC2018 09 11.46198 22 05 41.05 -03 16 30.2 18.6 RVER121474
K18R04A KC2018 09 11.46948 22 05 47.71 -03 15 34.4 19.4 VqER121E23
K18R04A KC2018 09 11.48800 22 05 58.04 -03 12 31.0 19.0 VqER121E23
K18R04A KC2018 09 11.50652 22 06 08.16 -03 09 27.5 19.2 VqER121E23
Observer details:
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector
+ CCD.
474 Mount John Observatory, Lake Tekapo. Observers A. C. Gilmore,
P. M. Kilmartin. Measurer P. M. Kilmartin. 1.0-m f/7.7 reflector + CCD.
595 Farra d'Isonzo. Observers E. Pettarin, F. Piani. Measurer E. Pettarin.
0.61-m f/4.0 reflector + CCD.
703 Catalina Sky Survey. Observer D. C. Fuls. Measurers B. M. Africano,
E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
H. Groeller, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
R. L. Seaman, F. C. Shelly. 0.68-m Schmidt + 10K CCD.
E23 Arcadia. Observer A. Hidas. 0.35-m f/1.9 reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer R. A. Kowalski.
Measurers B. M. Africano, E. J. Christensen, G. A. Farneth, D. C. Fuls,
A. R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson, R. A. Kowalski,
S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly. 1.0-m reflector
+ CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.41-m
f/3.2 Newtonian reflector + CCD.
L01 Visnjan Observatory, Tican. Observers K. Korlevic, I. Lyon. Measurer
K. Korlevic. 1.0-m f/2.9 reflector + CCD.
Orbital elements:
2018 RA4 Earth MOID = 0.0320 AU
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5 MPC
M 314.13629 (2000.0) P Q
n 0.31310947 Peri. 334.33990 +0.74151769 +0.67005969
a 2.1478564 Node 343.44472 -0.59302554 +0.63070021
e 0.5243981 Incl. 6.89912 -0.31380283 +0.39145531
P 3.15 H 24.2 G 0.15 U 7
Residuals in seconds of arc
180910 703 0.1- 0.2+ 180910 L01 0.2+ 0.2- 180911 I52 0.4- 0.1+
180910 703 0.6- 0.2- 180910 104 0.3+ 0.2+ 180911 I52 0.1+ 0.3-
180910 703 0.5- 0.4+ 180910 K63 1.6- 0.7- 180911 I52 0.1+ 0.5-
180910 703 0.1+ 0.0 180910 104 0.1- 0.2+ 180911 I52 0.8+ 0.2-
180910 I52 0.0 0.0 180910 K63 1.7- 1.0- 180911 474 0.1- 0.1-
180910 I52 0.0 0.2+ 180910 K63 0.4+ 0.1+ 180911 474 0.3- 0.1-
180910 I52 0.3+ 0.2- 180910 204 0.2+ 0.2- 180911 474 0.1- 0.0
180910 I52 0.6+ 0.2- 180910 204 0.2+ 0.0 180911 474 0.1- 0.2+
180910 L01 0.3+ 0.1+ 180910 204 0.2+ 0.1+ 180911 E23 0.2- 0.5+
180910 L01 0.4+ 0.3+ 180910 595 0.5- 0.5+ 180911 E23 0.8+ 0.1+
180910 L01 0.1+ 0.3+ 180910 595 0.6+ 0.0 180911 E23 0.6- 0.1+
180910 104 0.6+ 0.2+ 180910 595 0.5+ 0.2+
Ephemeris:
2018 RA4 a,e,i = 2.15, 0.52, 7 q = 1.0215
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2018 08 12 14 25 38.8 -45 35 50 0.1289 1.0231 90.7 82.1 22.7
...
2018 08 27 17 05 40.1 -48 11 46 0.06686 1.0297 105.0 71.4 20.9
...
2018 09 04 20 12 21.5 -30 25 27 0.05156 1.0466 136.4 41.6 19.5
...
2018 09 10 21 49 51.4 -07 39 27 0.06133 1.0648 159.4 19.4 19.3
2018 09 11 22 00 56.3 -04 36 35 0.06454 1.0682 161.4 17.5 19.3
2018 09 12 22 10 53.4 -01 51 20 0.06808 1.0718 162.7 16.2 19.4
...
2018 09 18 22 53 20.8 +09 31 39 0.09430 1.0957 163.4 15.2 20.1
...
2018 09 26 23 24 06.6 +16 32 12 0.1372 1.1332 160.9 16.8 21.1
...
2018 10 11 23 52 42.2 +20 36 40 0.2332 1.2177 157.9 18.0 22.4
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-R121
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