MPEC 2021-E144 : 2021 EK4
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M.P.E.C. 2021-E144 Issued 2021 March 15, 10:31 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
2021 EK4
Observations:
K21E04K* C2021 03 13.70429 12 02 00.89 -03 12 52.5 20.6 RqEE144D29
K21E04K C2021 03 13.71844 12 02 02.99 -03 12 07.0 20.5 RqEE144D29
K21E04K C2021 03 13.73258 12 02 05.12 -03 11 22.2 20.6 RqEE144D29
K21E04K 1C2021 03 14.11796 12 03 08.02 -02 50 40.7 20.5 VVEE144033
K21E04K 1C2021 03 14.12086 12 03 08.46 -02 50 31.6 20.4 VVEE144033
K21E04K 1C2021 03 14.12376 12 03 08.98 -02 50 21.7 20.2 VVEE144033
K21E04K |C2021 03 14.18049 12 03 20.13 -02 46 28.4 20.3 GVEE144807
K21E04K |C2021 03 14.18197 12 03 20.35 -02 46 23.6 20.3 GVEE144807
K21E04K |C2021 03 14.18419 12 03 20.69 -02 46 16.3 20.2 GVEE144807
K21E04K KC2021 03 15.01727 12 05 41.62 -02 00 15.8 20.4 GVEE144204
K21E04K KC2021 03 15.03364 12 05 44.28 -01 59 18.1 VEE144204
K21E04K KC2021 03 15.30328 12 06 31.93 -01 43 34.0 oEE144711
K21E04K KC2021 03 15.30678 12 06 32.51 -01 43 21.4 oEE144711
K21E04K HC2021 03 15.30983 12 06 33.25 -01 43 11.6 20.4 RoEE144691
K21E04K KC2021 03 15.31021 12 06 33.06 -01 43 09.4 oEE144711
K21E04K HC2021 03 15.31519 12 06 34.09 -01 42 53.0 20.5 RoEE144691
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, U. Laux, F. Ludwig, B. Stecklum. Measurer B. Stecklum. 1.34-m
f/3 Schmidt + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
691 Steward Observatory, Kitt Peak-Spacewatch. Observer R. A. Mastaler.
0.9-m f/3 reflector + CCD.
711 McDonald Observatory, Fort Davis. Observers J. G. Ries, J. W. Kuehne.
Measurer J. G. Ries. 2.1-m reflector + CCD + focal reducer.
807 Cerro Tololo Observatory, La Serena. Observers T. Linder, R. Holmes.
1.00-m f/10.0 astrograph + CCD.
D29 Purple Mountain Observatory, XuYi Station. Observers H. B. Zhao, B. Li,
G. Zhaori, R. Q. Hong, L. F. Hu. Measurers H. B. Zhao, B. Li, H. Lu, G.
Zhaori, Z. J. Xu. 1.04-m f/1.8 Schmidt + CCD.
Orbital elements:
2021 EK4 Earth MOID = 0.1559 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 326.52594 (2000.0) P Q
n 0.25079216 Peri. 44.64840 -0.74952172 +0.66181067
a 2.4903482 Node 176.68281 -0.65630444 -0.73995300
e 0.5626989 Incl. 14.98460 -0.08649671 -0.12031711
P 3.93 H 22.88 G 0.15 U 8
Residuals in seconds of arc
210313 D29 0.1+ 0.1+ 210314 807 0.2+ 0.0- 210315 711 0.7+ 0.2+
210313 D29 0.3- 0.3+ 210314 807 0.0+ 0.1- 210315 691 0.1+ 0.1+
210313 D29 0.3- 0.3- 210314 807 0.0+ 0.1- 210315 711 0.7+ 0.2+
210314 033 0.0- 0.2+ 210315 204 0.4- 0.0+ 210315 691 0.3- 0.1-
210314 033 0.4- 0.2- 210315 204 (0.4- 1.2+)
210314 033 0.5+ 0.1+ 210315 711 0.5+ 0.1-
Ephemeris:
2021 EK4 a,e,i = 2.49, 0.56, 15 q = 1.0890
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 02 13 11 13 42.5 -14 11 49 0.4801 1.4073 144.9 23.8 23.1
...
2021 02 28 11 33 34.0 -11 21 24 0.3380 1.3082 156.9 17.3 22.0
...
2021 03 08 11 48 16.9 -07 30 11 0.2749 1.2599 164.8 11.9 21.3
...
2021 03 14 12 02 49.4 -02 56 39 0.2344 1.2263 171.2 7.1 20.7
2021 03 15 12 05 38.7 -02 00 50 0.2283 1.2210 172.1 6.4 20.6
2021 03 16 12 08 36.0 -01 01 49 0.2224 1.2157 173.0 5.8 20.5
...
2021 03 22 12 29 34.3 +06 02 57 0.1915 1.1859 171.0 7.6 20.2
...
2021 03 30 13 08 34.1 +18 26 02 0.1647 1.1513 156.3 20.4 20.3
...
2021 04 14 15 00 48.0 +41 21 07 0.1643 1.1056 125.1 47.9 21.0
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-E144
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