MPEC 2023-E100 : 2020 KR4
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M.P.E.C. 2023-E100 Issued 2023 March 15, 14:05 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets, routine data on comets and natural satellites,
and occasional editorial announcements. 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
2020 KR4
Revision to MPEC 2020-K175
Additional Observations:
K20K04R C2015 05 21.47932216 20 14.710-09 57 35.79 21.89GVEE100F51
K20K04R C2015 05 21.49169316 20 12.206-09 57 28.69 21.86GVEE100F51
K20K04R C2015 05 21.50403416 20 09.725-09 57 21.71 21.63GVEE100F51
K20K04R C2015 05 21.51640716 20 07.195-09 57 14.27 21.51GVEE100F51
K20K04R C2015 05 22.49346316 16 49.857-09 47 36.19 21.95GVEE100F51
K20K04R C2015 05 22.50606016 16 47.214-09 47 28.72 22.48GVEE100F51
K20K04R C2015 05 22.51860916 16 44.577-09 47 21.18 22.07GVEE100F51
K20K04R KC2015 07 12.28000412 04 56.592+00 50 32.29 21.33GVEE100F51
K20K04R C2020 06 01.46332315 56 39.757-08 43 00.01 20.17GVEE100F52
K20K04R C2020 06 01.49604315 56 26.440-08 42 22.17 19.69GVEE100F52
K20K04R C2020 06 01.51238515 56 19.774-08 42 03.62 20.91GVEE100F52
K20K04R C2020 06 13.26878814 12 26.788-03 23 35.52 21.23GVEE100F52
K20K04R C2020 06 13.28126514 12 18.528-03 23 09.44 20.71GVEE100F52
K20K04R C2020 06 13.29377314 12 10.290-03 22 43.28 20.82GVEE100F52
K20K04R C2020 06 13.30628814 12 02.051-03 22 17.20 21.06GVEE100F52
K20K04R KC2023 03 14.41537115 40 41.200+50 46 52.90 20.80GVEE100I52
K20K04R KC2023 03 14.42317115 40 32.640+50 47 07.30 21.01GVEE100I52
K20K04R KC2023 03 14.42745215 40 27.960+50 47 15.30 20.93GVEE100I52
K20K04R KC2023 03 14.43172715 40 23.290+50 47 22.90 20.73GVEE100I52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, K. Chambers, T. Dukes, T.
Lowe, A. Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer G. J. Leonard.
Measurers E. J. Christensen, D. Fay, J. B. Fazekas, D. C. Fuls, A. R.
Gibbs, A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M.
Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A. Serrano, F. C. Shelly,
K. W. Wierzchos. 1.0-m prime focus + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
150521 F51 0.10- 0.02- 230314 I52 0.18- 0.24- MPO725003 +0.11 days
Orbital elements:
2020 KR4 PHA, Earth MOID = 0.0149 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 11.34615 (2000.0) P Q
n 0.39721424 Peri. 314.71171 +0.79650827 -0.54865819
a 1.8328187 Node 80.18495 +0.60153428 +0.67662810
e 0.9047607 Incl. 14.94184 +0.06108266 +0.49106884
P 2.48 H 21.06 G 0.15 U 0
Residuals in seconds of arc
150521 F51 0.0 0.1+ 200527 654 0.1+ 0.2- 200612 I52 0.5- 0.5-
150521 F51 0.0 0.0 200527 654 0.0 0.0 200612 I52 0.2- 0.3-
150521 F51 0.3+ 0.3- 200528 I52 0.2- 0.1+ 200612 I52 0.2- 0.1-
150521 F51 0.0 0.1- 200528 I52 0.1- 0.1+ 200612 I52 0.2- 0.0
150522 F51 0.2- 0.1+ 200528 I52 0.1+ 0.0 200613 734 0.1- 0.4+
150522 F51 0.1- 0.0 200528 I52 0.1+ 0.1+ 200613 734 1.0- 0.9-
150522 F51 0.1- 0.1- 200528 F51 0.1- 0.1+ 200613 734 1.4- 1.9-
150712 F51 0.0 0.2+ 200528 F51 0.0 0.0 200613 F52 0.5+ 0.0
200517 F52 0.1- 0.2+ 200528 F51 0.1+ 0.0 200613 F52 0.1- 0.0
200517 F52 0.0 0.0 200528 F51 0.0 0.0 200613 F52 0.1+ 0.0
200517 F52 0.1- 0.6+ 200529 I52 0.5- 0.4+ 200613 F52 0.3+ 0.1-
200520 F52 0.1+ 0.1+ 200529 I52 0.2- 0.1+ 200614 I52 0.3+ 0.0
200520 F52 0.2- 0.2- 200529 I52 0.0 0.1- 200614 I52 0.5- 0.3-
200524 F52 0.0 0.1- 200529 I52 0.1- 0.4- 200614 I52 0.4- 0.2+
200524 F52 0.1+ 0.1+ 200601 F52 0.4+ 0.3+ 200614 I52 0.1- 0.8-
200524 F52 0.1- 0.1- 200601 F52 0.4+ 0.4+ 200617 I41 0.1- 0.6+
200524 F52 0.2- 0.0 200601 F52 0.2+ 0.0 200617 I41 0.6+ 0.4-
200525 673 0.5+ 0.0 200608 I52 0.1- 0.3- 200620 I41 0.0 0.3-
200525 673 0.2+ 0.0 200608 I52 0.3- 0.1+ 200620 I41 0.0 0.1-
200526 H21 0.3+ 0.4+ 200608 I52 0.0 0.1+ 200620 I41 0.4+ 0.2+
200526 H21 0.1- 0.2+ 200608 I52 0.0 0.1- 200620 I41 0.0 0.2+
200526 H21 0.1- 0.2- 200610 I52 1.7+ 0.6- 200623 I41 0.4- 0.2-
200526 I52 0.1- 0.1+ 200610 I52 0.0 0.5- 230314 I52 0.0 0.0
200526 I52 0.1- 0.1- 200610 I52 0.1- 0.6- 230314 I52 0.2- 0.0
200527 I52 0.3- 0.5- 200610 I52 0.1+ 0.4- 230314 I52 0.1- 0.1+
200527 I52 0.0 0.1+ 200611 I52 0.2- 0.7- 230314 I52 0.0 0.2-
200527 I52 0.1+ 0.0 200611 I52 0.2- 1.0+
200527 I52 0.0 0.2- 200611 I52 0.1- 1.2+
Ephemeris:
2020 KR4 a,e,i = 1.83, 0.90, 15 q = 0.1746
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 02 13 20 52 04.7 -00 21 13 0.4762 0.5564 18.5 145.8 25.9
...
2023 02 28 19 15 21.0 +26 00 34 0.3068 0.8817 60.7 101.7 21.9
...
2023 03 08 17 33 57.1 +43 14 15 0.2897 1.0313 89.5 74.2 21.0
...
2023 03 14 15 48 11.6 +50 33 08 0.3162 1.1354 108.7 56.0 20.9
2023 03 15 15 30 13.0 +51 02 21 0.3236 1.1522 111.4 53.5 20.9
2023 03 16 15 12 41.7 +51 19 56 0.3318 1.1688 113.9 51.1 20.9
...
2023 03 22 13 44 18.2 +50 04 46 0.3946 1.2652 125.2 40.1 21.1
...
2023 03 30 12 34 12.8 +45 04 40 0.5059 1.3862 131.5 32.7 21.7
...
2023 04 14 11 41 08.6 +36 18 46 0.7650 1.5937 128.2 29.6 22.8
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-E100
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