MPEC 2021-F10 : 2021 EY4
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M.P.E.C. 2021-F10 Issued 2021 March 17, 11:35 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 EY4
Observations:
K21E04Y* C2021 03 15.32603410 50 23.329-32 48 07.50 20.42wUEF010F51
K21E04Y C2021 03 15.33575010 50 23.611-32 47 21.79 20.45wUEF010F51
K21E04Y C2021 03 15.34544910 50 23.881-32 46 36.57 20.50wUEF010F51
K21E04Y C2021 03 15.35513710 50 24.159-32 45 50.68 20.43wUEF010F51
K21E04Y 4C2021 03 15.93111 10 50 52.71 -31 59 30.3 19.9 GVEF010J04
K21E04Y 4C2021 03 15.93281 10 50 52.80 -31 59 22.4 20.2 GVEF010J04
K21E04Y 4C2021 03 15.93452 10 50 52.83 -31 59 13.2 20.0 GVEF010J04
K21E04Y KC2021 03 16.41067210 51 16.27 -31 19 12.9 20.1 GVEF010474
K21E04Y KC2021 03 16.41303110 51 16.41 -31 19 01.8 21.2 GVEF010474
K21E04Y KC2021 03 16.41539010 51 16.47 -31 18 49.5 20.8 GVEF010474
K21E04Y KC2021 03 16.41774810 51 16.51 -31 18 37.6 20.7 GVEF010474
K21E04Y 2C2021 03 16.97050210 51 44.320-30 32 56.31 20.5 GVEF010J04
K21E04Y 2C2021 03 16.97207610 51 44.377-30 32 48.46 20.6 GVEF010J04
K21E04Y 2C2021 03 16.97363910 51 44.454-30 32 40.51 20.0 GVEF010J04
K21E04Y KC2021 03 17.45021810 52 09.12 -29 50 52.7 20.1 GVEF010474
K21E04Y KC2021 03 17.45253010 52 09.21 -29 50 40.6 19.7 GVEF010474
K21E04Y KC2021 03 17.45430910 52 09.26 -29 50 31.4 20.1 GVEF010474
Observer details:
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.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, M.
Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
J04 ESA Optical Ground Station, Tenerife. Observer P. Ruiz. Measurers A.
Knofel, D. Koschny, M. Busch, M. Micheli, E. Schwab, R. Kresken, L.
Conversi. 1.0-m f/4.4 reflector + CCD.
Orbital elements:
2021 EY4 Earth MOID = 0.1654 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 304.58744 (2000.0) P Q
n 0.70817235 Peri. 334.01810 -0.96520707 -0.25203562
a 1.2465511 Node 192.02149 +0.25698819 -0.96352229
e 0.0709777 Incl. 19.54122 -0.04829471 -0.09001578
P 1.39 H 22.47 G 0.15 U 8
Residuals in seconds of arc
210315 F51 0.1+ 0.1+ 210315 J04 0.1- 0.6+ 210316 J04 0.0+ 0.1-
210315 F51 0.1+ 0.2+ 210316 474 0.3- 0.0- 210316 J04 0.4+ 0.1-
210315 F51 0.0- 0.3- 210316 474 0.4+ 0.6- 210317 474 0.0- 0.0-
210315 F51 0.0- 0.1- 210316 474 0.0+ 0.1+ 210317 474 0.0+ 0.1+
210315 J04 0.2- 0.0- 210316 474 0.6- 0.4+ 210317 474 0.2- 0.0+
210315 J04 0.2+ 0.3- 210316 J04 0.0- 0.1+
Ephemeris:
2021 EY4 a,e,i = 1.25, 0.07, 20 q = 1.1581
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 02 15 10 35 02.3 -50 53 00 0.3166 1.1607 115.7 50.1 22.2
...
2021 03 02 10 42 05.0 -45 28 58 0.2485 1.1582 127.2 43.0 21.4
...
2021 03 10 10 46 33.3 -39 00 41 0.2159 1.1582 136.1 36.5 20.9
...
2021 03 16 10 50 54.5 -31 53 21 0.1958 1.1590 144.1 30.2 20.6
2021 03 17 10 51 45.0 -30 29 52 0.1930 1.1591 145.5 29.1 20.5
2021 03 18 10 52 37.6 -29 02 55 0.1903 1.1593 146.9 28.0 20.4
...
2021 03 24 10 58 42.5 -19 15 51 0.1786 1.1608 154.6 21.6 20.1
...
2021 04 01 11 08 59.8 -04 31 27 0.1764 1.1636 157.0 19.6 20.0
...
2021 04 16 11 33 52.1 +18 50 37 0.2132 1.1712 138.3 34.8 20.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-F10
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