MPEC 2021-E143 : 2021 EJ4
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M.P.E.C. 2021-E143 Issued 2021 March 15, 05:23 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 EJ4
Observations:
K21E04J* C2021 03 10.42132815 15 46.02 +34 40 11.5 21.15GVEE143G96
K21E04J C2021 03 10.42655515 15 47.37 +34 40 27.6 21.87GVEE143G96
K21E04J C2021 03 10.43178415 15 48.72 +34 40 43.1 21.53GVEE143G96
K21E04J C2021 03 10.43702515 15 50.17 +34 40 59.3 22.17GVEE143G96
K21E04J mC2021 03 10.48223615 16 01.97 +34 43 16.1 21.77GVEE143G96
K21E04J mC2021 03 10.48619115 16 03.01 +34 43 28.3 21.62GVEE143G96
K21E04J mC2021 03 10.49014715 16 04.00 +34 43 39.9 21.89GVEE143G96
K21E04J mC2021 03 11.38207315 20 07.10 +35 28 48.6 21.62GVEE143G96
K21E04J mC2021 03 11.38554915 20 07.99 +35 28 59.2 21.72GVEE143G96
K21E04J mC2021 03 11.38699715 20 08.41 +35 29 03.5 21.53GVEE143G96
K21E04J mC2021 03 11.39045915 20 09.34 +35 29 14.6 21.86GVEE143G96
K21E04J 2C2021 03 15.06485715 37 53.907+38 36 35.71 21.2 GVEE143J04
K21E04J 2C2021 03 15.08059615 37 58.634+38 37 24.77 21.5 GVEE143J04
K21E04J 2C2021 03 15.09640115 38 03.343+38 38 13.51 20.9 GVEE143J04
Observer details:
G96 Mt. Lemmon Survey. Observer D. C. Fuls. Measurers 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, T. A. Pruyne, D. Rankin, R. L.
Seaman, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K CCD.
J04 ESA Optical Ground Station, Tenerife. Observer P. Ruiz. Measurers M.
Micheli, D. Koschny, L. Conversi, R. Kresken, A. Knofel, M. Busch, E.
Schwab. 1.0-m f/4.4 reflector + CCD.
Orbital elements:
2021 EJ4 PHA, Earth MOID = 0.0477 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 324.61843 (2000.0) P Q
n 0.22263109 Peri. 126.26089 +0.01041331 +0.95349638
a 2.6961590 Node 140.80448 -0.99983944 +0.01432165
e 0.6659862 Incl. 28.46649 -0.01458262 -0.30106402
P 4.43 H 20.79 G 0.15 U 9
Residuals in seconds of arc
210310 G96 0.2+ 0.1+ 210310 G96 0.2+ 0.0- 210311 G96 0.0+ 0.3+
210310 G96 0.1- 0.3+ 210310 G96 0.5- 0.4- 210315 J04 0.1+ 0.1-
210310 G96 0.3- 0.1- 210311 G96 0.2+ 0.0- 210315 J04 0.1+ 0.2+
210310 G96 0.6+ 0.2+ 210311 G96 0.3- 0.1- 210315 J04 0.2- 0.1-
210310 G96 0.1+ 0.2- 210311 G96 0.0+ 0.3-
Ephemeris:
2021 EJ4 a,e,i = 2.70, 0.67, 28 q = 0.9006
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 02 13 13 50 43.0 +17 13 43 0.8637 1.6132 121.1 31.6 22.9
...
2021 02 28 14 34 58.6 +26 24 34 0.6827 1.4731 122.3 34.6 22.2
...
2021 03 08 15 05 17.3 +32 39 05 0.6113 1.3985 119.5 38.2 22.0
...
2021 03 14 15 32 33.0 +37 42 12 0.5702 1.3430 115.6 41.9 21.8
2021 03 15 15 37 32.9 +38 33 16 0.5644 1.3338 114.8 42.6 21.8
2021 03 16 15 42 41.4 +39 24 13 0.5589 1.3246 114.0 43.3 21.8
...
2021 03 22 16 16 46.3 +44 21 23 0.5319 1.2701 108.6 48.0 21.7
...
2021 03 30 17 11 35.2 +50 01 25 0.5109 1.1993 100.2 55.0 21.7
...
2021 04 14 19 16 00.1 +55 01 17 0.5059 1.0768 84.2 67.9 21.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-E143
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