MPEC 2019-U22 : 2018 NR4
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M.P.E.C. 2019-U22 Issued 2019 October 18, 01:01 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 NR4
Revision to MPEC 2018-O19
Additional Observations:
K18N04R C2015 12 09.61397010 41 34.801+00 56 53.76 22.3 GVEU022F51
K18N04R C2015 12 09.62334310 41 35.070+00 57 16.48 22.8 GVEU022F51
K18N04R C2015 12 09.63275110 41 35.348+00 57 39.87 22.5 GVEU022F51
K18N04R C2015 12 09.64224810 41 35.618+00 58 02.81 23.0 GVEU022F51
K18N04R C2016 01 20.48553910 15 47.085+41 23 39.99 21.0 GVEU022F51
K18N04R C2016 01 20.49845310 15 45.284+41 24 25.92 21.2 GVEU022F51
K18N04R C2016 01 28.48081209 55 50.728+48 33 58.34 21.9 GVEU022F51
K18N04R C2018 06 23.55292121 46 59.524-01 40 31.92 22.0 GVEU022F51
K18N04R C2018 06 23.59086221 47 00.535-01 41 44.94 21.8 GVEU022F51
K18N04R C2019 01 11.34583 08 15 01.01 -11 25 38.5 20.4 GVEU022G96
K18N04R C2019 01 11.35097 08 14 59.75 -11 25 01.4 20.0 GVEU022G96
K18N04R C2019 01 11.35612 08 14 58.48 -11 24 24.8 20.2 GVEU022G96
K18N04R C2019 01 13.44884808 06 39.860-07 11 13.44 20.4 GVEU022F51
K18N04R C2019 01 13.46135708 06 36.798-07 09 41.78 20.3 GVEU022F51
K18N04R C2019 01 13.48636108 06 30.676-07 06 38.41 19.9 GVEU022F51
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, E.
Magnier, A. Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon 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, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman, F. C.
Shelly. 1.5-m reflector + 10K CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
151209 F51 26.2- 73.4- 190113 F51 0.1- 1.0- MPO473497 -0.00 days
Orbital elements:
2018 NR4 Earth MOID = 0.4353 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 Veres
M 58.77056 (2000.0) P Q
n 0.31628526 Peri. 272.23670 +0.38749579 -0.53061574
a 2.1334547 Node 121.00336 +0.60500095 +0.76337760
e 0.5270926 Incl. 61.58220 -0.69557232 +0.36837695
P 3.12 H 20.2 G 0.15 U 0
Residuals in seconds of arc
151209 F51 0.0 0.2+ 180710 H21 0.0 0.0 180809 474 0.2+ 0.4+
151209 F51 0.0 0.1- 180710 H21 0.1- 0.2+ 180809 474 0.3- 0.1+
151209 F51 0.1+ 0.1+ 180710 474 0.2+ 0.0 181227 807 0.0 0.0
151209 F51 0.0 0.3- 180710 474 0.0 0.2+ 181227 807 0.0 0.1-
160120 F51 0.1+ 0.3+ 180710 474 0.1- 0.3- 181227 807 0.2- 0.0
160120 F51 0.4- 0.3+ 180710 474 0.2- 0.0 190111 G96 0.1- 0.1-
160128 F51 0.1+ 0.3- 180713 807 0.1+ 0.0 190111 G96 0.0 0.2+
180623 F51 0.0 0.2- 180713 807 0.1+ 0.0 190111 G96 0.0 0.0
180623 F51 0.1- 0.0 180713 807 0.1+ 0.0 190113 F51 0.1- 0.1+
180709 F51 0.1- 0.3+ 180717 474 0.1- 0.2- 190113 F51 0.0 0.0
180709 F51 0.1+ 0.1- 180717 474 0.1+ 0.0 190113 F51 0.0 0.1-
180709 F51 0.3+ 0.0 180717 474 0.1- 0.1- 190204 F52 0.0 0.0
180709 F51 0.0 0.1+ 180809 474 0.0 0.2+ 190204 F52 0.2- 0.1-
180710 H21 0.0 0.3+ 180809 474 0.1+ 0.1+ 190204 F52 0.2+ 0.1+
Ephemeris:
2018 NR4 a,e,i = 2.13, 0.53, 62 q = 1.0089
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2019 09 18 12 25 15.2 +39 44 25 3.5371 2.8270 39.0 12.9 26.0
...
2019 10 03 12 54 20.2 +38 30 23 3.5389 2.8804 42.4 13.6 26.0
...
2019 10 11 13 09 43.6 +37 56 31 3.5312 2.9074 44.7 14.0 26.1
...
2019 10 17 13 21 12.6 +37 34 13 3.5217 2.9269 46.5 14.3 26.1
2019 10 18 13 23 07.2 +37 30 47 3.5199 2.9301 46.9 14.4 26.1
2019 10 19 13 25 01.6 +37 27 26 3.5179 2.9333 47.2 14.4 26.1
...
2019 10 25 13 36 26.8 +37 09 10 3.5046 2.9520 49.2 14.8 26.1
...
2019 11 02 13 51 35.1 +36 50 13 3.4828 2.9761 52.0 15.2 26.1
...
2019 11 17 14 19 37.0 +36 33 34 3.4311 3.0185 57.6 16.1 26.1
A. U. Tomatic (C) Copyright 2019 MPC M.P.E.C. 2019-U22
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