MPEC 2021-C276 : 2018 YJ2
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M.P.E.C. 2021-C276 Issued 2021 February 13, 15:53 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 YJ2
Revision to MPEC 2018-Y91
Additional Observations:
K18Y02J C2013 04 06.31837012 09 03.442+14 02 50.47 22.25GVEC276F51
K18Y02J C2013 04 06.34594412 08 59.538+14 03 03.03 22.01GVEC276F51
K18Y02J C2013 12 25.42207911 44 51.906+88 51 50.87 17.82GVEC276F51
K18Y02J C2013 12 25.42437711 42 20.985+88 51 53.07 18.78GVEC276F51
K18Y02J C2013 12 25.53822009 44 28.836+88 43 22.92 18.00GVEC276F51
K18Y02J C2014 01 06.46304105 52 08.280+58 35 45.10 18.57GVEC276F51
K18Y02J C2014 01 06.47022205 52 07.992+58 35 13.33 18.63GVEC276F51
K18Y02J C2018 03 11.54358613 09 09.629+08 20 05.12 21.80GVEC276F51
K18Y02J C2018 03 11.55637613 09 08.242+08 20 16.19 22.83GVEC276F51
K18Y02J C2018 04 12.29491811 58 54.259+14 18 49.99 23.49GVEC276F51
K18Y02J C2018 04 12.30577311 58 52.835+14 18 53.21 22.31GVEC276F51
K18Y02J C2018 04 12.31666911 58 51.395+14 18 56.45 22.72GVEC276F51
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
130406 F51 0.04+ 0.02+ 180412 F51 0.00+ 0.00+ MPO467307 -0.01 days
Orbital elements:
2018 YJ2 PHA, Earth MOID = 0.0328 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 258.70026 (2000.0) P Q
n 0.78801484 Peri. 293.30291 +0.99423831 +0.02947506
a 1.1608598 Node 65.14119 +0.01887646 +0.89828304
e 0.4039146 Incl. 6.52197 -0.10551716 +0.43842765
P 1.25 H 21.8 G 0.15 U 1
Residuals in seconds of arc
130406 F51 0.2- 0.2+ 181226 C95 0.7+ 0.1- 181229 204 0.2- 0.2-
130406 F51 0.2- 0.3+ 181226 W34 0.1- 0.5- 181229 204 0.1- 0.0
131225 F51 1.0- 0.1+ 181226 W34 0.2+ 0.2+ 181229 204 0.1- 0.0
131225 F51 0.5- 0.1+ 181226 W34 0.2- 0.3- 181229 204 0.0 0.4-
131225 F51 1.0- 0.4- 181227 W34 0.3+ 0.3+ 190104 703 0.1- 0.1+
140106 F51 0.1- 0.3- 181227 G40 0.3+ 0.1- 190104 703 0.2+ 0.0
140106 F51 0.0 0.4- 181227 G40 0.3- 0.1+ 190104 703 0.3- 0.1-
180311 F51 0.1- 0.1+ 181227 718 0.5+ 0.1+ 190105 I52 0.1+ 0.1-
180311 F51 0.2+ 0.1+ 181227 718 0.5+ 0.8+ 190105 I52 0.1- 0.2-
180412 F51 0.4+ 0.1- 181227 718 0.1+ 0.5+ 190105 I52 0.0 0.0
180412 F51 0.2+ 0.0 181227 718 0.3+ 0.2+ 190105 I52 0.0 0.1-
180412 F51 0.3- 0.3+ 181227 718 0.7+ 1.0+ 190108 I52 0.3+ 0.3+
181226 T08 0.0 1.7+ 181227 718 0.4+ 0.7+ 190108 I52 0.2+ 0.1-
181226 T08 1.0+ 1.8+ 181227 J95 0.1- 0.1- 190108 I52 0.0 0.3-
181226 T08 0.7+ 0.2+ 181227 J95 0.0 0.0 190108 I52 0.1- 0.2-
181226 T08 0.2- 1.2- 181227 J95 0.1+ 0.2+ 190108 703 0.4- 0.3+
181226 L01 0.0 0.2+ 181227 J95 0.2+ 0.1+ 190108 703 0.7+ 0.1+
181226 L01 0.1+ 0.1+ 181227 595 0.5+ 0.2+ 190108 703 0.7+ 0.8-
181226 L01 0.0 0.0 181227 587 0.1+ 0.4+ 190109 I52 0.0 0.3-
181226 L01 0.0 0.2+ 181227 595 0.4- 0.1+ 190109 I52 0.1- 0.2-
181226 L01 0.1- 0.1+ 181227 587 0.1+ 0.3+ 190109 I52 0.0 0.3-
181226 K88 0.0 0.1+ 181227 587 0.2+ 0.3+ 190116 F52 0.0 0.1-
181226 K88 0.0 0.3+ 181227 595 0.1+ 0.0 190116 F52 0.0 0.0
181226 K88 0.1+ 0.2+ 181227 K38 0.1+ 0.1- 190116 F52 0.1+ 0.1-
181226 K88 0.1+ 0.3+ 181227 K38 0.1- 0.0 190116 F52 0.0 0.2-
181226 K88 0.0 0.3+ 181227 K38 0.1- 0.0 190117 291 0.0 0.2+
181226 K88 0.0 0.3+ 181227 K38 0.1- 0.1+ 190117 291 0.0 0.2+
181226 K88 0.1+ 0.4+ 181228 J22 0.1+ 0.8- 190117 291 0.1+ 0.3+
181226 K88 0.0 0.4+ 181228 J22 1.1- 0.7+ 190124 F52 0.2+ 0.2-
181226 K88 0.2+ 0.2+ 181228 J22 1.1- 0.9+ 190124 F52 0.1- 0.0
181226 104 0.4+ 0.1- 181228 J22 0.1- 0.3+ 190124 F52 0.0 0.2+
181226 104 0.1+ 0.1+ 181228 J22 0.3+ 0.8+ 190124 F52 0.1- 0.1+
181226 104 0.3+ 0.0 181228 J22 0.5- 0.1- 190125 G96 0.2+ 0.1+
181226 104 0.2+ 0.1- 181228 P93 0.7+ 0.1+ 190125 G96 0.0 0.0
181226 K38 0.1+ 0.0 181228 P93 0.2+ 0.0 190125 G96 0.8- 0.1+
181226 K38 0.3+ 0.1+ 181228 P93 0.6+ 0.1+ 190125 G96 0.1+ 0.1-
181226 K38 0.1- 0.1- 181228 T05 0.0 0.1+ 190127 291 0.0 0.4+
181226 K88 0.0 0.1- 181228 T05 0.2+ 0.4- 190127 291 0.2+ 0.1+
181226 C95 0.4+ 0.3- 181228 T05 0.1- 0.1- 190127 291 0.3+ 0.3+
181226 K88 0.0 0.3+ 181228 T05 0.2- 0.1- 190131 291 0.2+ 0.3+
181226 K88 0.1- 0.0 181229 J95 0.0 0.3- 190131 291 0.1- 0.3+
181226 K38 0.2- 0.2- 181229 J95 0.2+ 0.0 190131 291 0.0 0.3+
181226 K88 0.2+ 0.2+ 181229 J95 0.3+ 0.1+ 190209 H21 0.8- 1.5+
181226 K88 0.2+ 0.1+ 181229 K38 0.0 0.1- 190209 H21 0.9- 1.2+
181226 C95 0.1+ 0.9+ 181229 K38 0.1+ 0.1- 190309 T12 0.2+ 0.0
181226 K38 0.2- 0.2- 181229 K38 0.3+ 0.1- 190309 T12 0.2+ 0.1-
181226 C95 0.5+ 0.7- 181229 K38 0.1- 0.1-
181226 K38 0.1+ 0.1+ 181229 204 0.0 0.1-
Ephemeris:
2018 YJ2 a,e,i = 1.16, 0.40, 7 q = 0.6920
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 14 17 16 45.3 -22 15 56 1.9503 1.2575 33.8 25.8 24.9
...
2021 01 29 18 15 15.7 -23 18 59 1.8172 1.1655 35.5 29.4 24.7
...
2021 02 06 18 49 16.7 -23 18 49 1.7512 1.1130 35.8 31.2 24.6
...
2021 02 12 19 16 03.7 -22 59 34 1.7051 1.0723 35.8 32.5 24.5
2021 02 13 19 20 37.6 -22 54 37 1.6978 1.0655 35.7 32.7 24.5
2021 02 14 19 25 13.1 -22 49 07 1.6906 1.0586 35.7 32.9 24.4
...
2021 02 20 19 53 20.1 -22 04 42 1.6500 1.0168 35.2 34.1 24.3
...
2021 02 28 20 32 09.5 -20 32 48 1.6038 0.9605 34.1 35.3 24.2
...
2021 03 15 21 47 56.2 -15 52 55 1.5473 0.8568 30.6 36.2 23.9
A. U. Tomatic (C) Copyright 2021 MPC M.P.E.C. 2021-C276
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