MPEC 2021-E149 : 2021 EN4
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M.P.E.C. 2021-E149 Issued 2021 March 15, 23:57 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 EN4
Observations:
K21E04N C2021 03 15.41625112 23 16.447+03 23 20.13 16.80GVEE149F51
K21E04N C2021 03 15.42976512 25 06.763+03 31 07.92 17.23GVEE149F51
K21E04N* C2021 03 15.43541712 25 47.37 +03 35 13.1 17.53oVEE149T08
K21E04N C2021 03 15.43910112 26 14.47 +03 37 07.1 17.54oVEE149T08
K21E04N C2021 03 15.44187212 26 34.25 +03 38 30.3 17.71oVEE149T08
K21E04N C2021 03 15.44617712 27 06.268+03 39 33.41 VEE149F51
K21E04N C2021 03 15.45360912 27 53.94 +03 44 04.5 17.64oVEE149T08
K21E04N C2021 03 15.45959612 28 34.129+03 45 44.42 17.57GVEE149F51
K21E04N KC2021 03 15.83336312 49 50.61 +04 48 00.5 19.6 GVEE149L01
K21E04N KC2021 03 15.83492312 49 52.51 +04 48 10.3 19.5 GVEE149L01
K21E04N KC2021 03 15.83648112 49 54.44 +04 48 19.5 19.5 GVEE149L01
K21E04N KC2021 03 15.83803812 49 56.29 +04 48 28.9 19.5 GVEE149L01
K21E04N KC2021 03 15.84091112 49 59.72 +04 48 47.0 19.6 GVEE149L01
K21E04N KC2021 03 15.84251812 50 01.60 +04 48 56.2 19.6 GVEE149L01
K21E04N KC2021 03 15.90669712 51 09.94 +04 55 04.1 18.5 GVEE149K63
K21E04N KC2021 03 15.91477112 51 16.99 +04 55 44.0 18.6 GVEE149K63
K21E04N KC2021 03 15.92491312 51 21.97 +04 56 05.1 19.9 GVEE149595
K21E04N 2C2021 03 15.92661312 51 55.527+05 00 40.49 19.9 GVEE149J04
K21E04N 2C2021 03 15.92790312 51 56.622+05 00 45.93 19.5 GVEE149J04
K21E04N 2C2021 03 15.92918412 51 57.710+05 00 52.06 19.7 GVEE149J04
K21E04N KC2021 03 15.93224712 51 27.86 +04 56 38.7 20.0 GVEE149595
Observer details:
595 Farra d'Isonzo. Observer E. Pettarin. 0.40-m f/5.15 reflector + CCD.
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.
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.
K63 G. Pascoli Observatory, Castelvecchio Pascoli. Observer R. Bacci. 0.41-m
f/3.2 Newtonian reflector + CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, A.
Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector + CCD.
Orbital elements:
2021 EN4 Earth MOID = 0.0002 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 350.23494 (2000.0) P Q
n 0.19558360 Peri. 299.02554 -0.40201275 -0.91559602
a 2.9393260 Node 174.65801 +0.86817850 -0.38405824
e 0.7350392 Incl. 5.14413 +0.29094990 -0.11909325
P 5.04 H 29.74 G 0.15 U 7
Residuals in seconds of arc
210315 F51 0.2- 0.1- 210315 F51 0.1- 0.2- 210315 K63 1.6- 0.2+
210315 F51 0.2+ 0.2+ 210315 L01 0.3- 0.1+ 210315 K63 0.5- 0.7+
210315 T08 (2.2- 0.8-) 210315 L01 0.4- 0.2+ 210315 595 0.1+ 0.1-
210315 T08 0.2+ 0.1- 210315 L01 0.2+ 0.2- 210315 J04 0.2+ 0.2+
210315 T08 0.1+ 0.0- 210315 L01 0.1- 0.3- 210315 J04 0.1+ 0.3-
210315 F51 (0.7- 0.4-) 210315 L01 0.0- 0.3+ 210315 J04 0.1+ 0.1+
210315 T08 (1.5+ 0.3+) 210315 L01 0.2- 0.3- 210315 595 0.0- 0.4-
Ephemeris:
2021 EN4 a,e,i = 2.94, 0.74, 5 q = 0.7788
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 02 13 00 39 51.4 -05 54 45 0.3120 0.7904 43.4 120.8 31.6
...
2021 02 28 00 54 01.6 -05 27 26 0.1511 0.8668 32.5 142.2 32.5
...
2021 03 08 00 57 38.6 -05 29 21 0.07047 0.9297 25.9 152.2 32.7
...
2021 03 14 01 06 13.6 -05 53 28 0.01146 0.9836 22.8 156.9 30.0
2021 03 15 02 01 43.9 -08 20 58 0.0017040.9931 36.0 144.0 23.3
2021 03 16 12 52 09.6 +05 12 56 0.0082031.0025 162.4 17.5 20.2
...
2021 03 22 13 03 25.2 +05 44 55 0.06723 1.0612 164.1 14.9 24.8
...
2021 03 30 13 03 15.9 +05 38 08 0.1479 1.1438 168.2 10.3 26.5
...
2021 04 14 13 02 06.5 +04 58 14 0.3121 1.3061 164.3 12.0 28.5
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-E149
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