MPEC 2021-M42 : 2021 LH9
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M.P.E.C. 2021-M42 Issued 2021 June 18, 04:16 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 LH9
Observations:
K21L09H*KC2021 06 13.16207 18 40 23.37 -33 28 41.5 19.2 GVEM042W94
K21L09H KC2021 06 13.16782 18 40 23.53 -33 28 38.6 18.6 GVEM042W94
K21L09H KC2021 06 13.17356 18 40 23.62 -33 28 35.5 18.8 GVEM042W94
K21L09H |C2021 06 14.21011 18 40 44.56 -33 21 59.5 20.2 GVEM042807
K21L09H |C2021 06 14.21380 18 40 44.60 -33 21 58.2 20.2 GVEM042807
K21L09H KC2021 06 16.02137718 41 19.22 -33 09 17.5 XEM042Y00
K21L09H KC2021 06 16.03707818 41 19.35 -33 09 11.3 19.6 GXEM042Y00
K21L09H KC2021 06 16.05296318 41 19.47 -33 09 04.7 19.3 GXEM042Y00
K21L09H KC2021 06 17.18304 18 41 37.53 -33 00 22.5 18.6 GVEM042W95
K21L09H KC2021 06 17.18834 18 41 37.59 -33 00 20.0 18.3 GVEM042W95
K21L09H KC2021 06 17.19364 18 41 37.61 -33 00 17.3 17.9 GVEM042W95
K21L09H KC2021 06 17.48281 18 41 42.32 -32 57 50.5 18.2 RqEM042E94
K21L09H KC2021 06 17.49632 18 41 42.42 -32 57 42.6 18.3 RqEM042E94
K21L09H KC2021 06 17.50384 18 41 42.52 -32 57 36.5 18.3 RqEM042E94
K21L09H KC2021 06 17.52656 18 41 42.62 -32 57 29.9 18.3 RqEM042E94
K21L09H KC2021 06 17.86668 18 41 48.85 -32 54 42.9 18.8 GVEM042L81
K21L09H KC2021 06 17.87289 18 41 48.92 -32 54 40.6 18.4 GVEM042L81
Observer details:
807 Cerro Tololo Observatory, La Serena. Observers T. Linder, R. Holmes, L.
Horn. 1.00-m f/10.0 astrograph + CCD.
E94 Possum Observatory, Gisborne. Observer J. Drummond. 0.41-m f/4.5
Newtonian reflector + CCD.
L81 Skygems Namibia Remote Observatory. Observer N. Paul. 0.5-m f/6.8
Corrected Dall-Kirkham + CCD.
W94 MAP, San Pedro de Atacama. Observers A. Maury, G. Attard. Measurers A.
Maury, G. Attard, D. Parrott. 0.28-m f/2.2 Schmidt + CCD.
W95 Observatorio Panameno, San Pedro de Atacama. Observers A. Maury, G.
Attard, J. Fabrega. Measurers A. Maury, G. Attard, D. Parrott. 0.40-m
f/3.8 reflector + CCD.
Y00 SONEAR Observatory, Oliveira. Observers C. Jacques, E. Pimentel, J.
Barros. Measurer C. Jacques. 0.45-m f/2.9 reflector + CCD.
Orbital elements:
2021 LH9 Earth MOID = 0.1868 AU
Epoch 2021 July 5.0 TT = JDT 2459400.5 Bell
M 344.83466 (2000.0) P Q
n 0.30633179 Peri. 30.85750 +0.81427629 +0.57153672
a 2.1794220 Node 293.94554 -0.55266361 +0.70984791
e 0.4533605 Incl. 6.37561 -0.17753044 +0.41165728
P 3.22 H 19.78 G 0.15 U 9
Residuals in seconds of arc
210613 W94 0.9- 1.1- 210616 Y00 0.0 0.1- 210617 E94 0.1+ 1.1+
210613 W94 0.2+ 0.1- 210616 Y00 0.4- 0.2+ 210617 E94 (0.7+ 3.6+)
210613 W94 0.5+ 1.0+ 210617 W95 0.5- 0.2- 210617 E94 0.1+ 0.7-
210614 807 0.0 0.1+ 210617 W95 0.1- 0.2- 210617 L81 0.0 0.3+
210614 807 0.0 0.0 210617 W95 0.2- 0.1+ 210617 L81 0.4+ 0.2-
210616 Y00 0.5+ 0.1- 210617 E94 0.1- 0.5-
Ephemeris:
2021 LH9 a,e,i = 2.18, 0.45, 6 q = 1.1914
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 05 19 18 22 52.3 -34 20 01 0.6060 1.5343 141.8 24.1 20.7
...
2021 06 03 18 35 23.1 -34 10 41 0.4731 1.4512 152.8 18.7 19.9
...
2021 06 11 18 39 33.0 -33 40 51 0.4137 1.4093 158.9 15.0 19.4
...
2021 06 17 18 41 34.1 -33 01 47 0.3744 1.3792 163.6 12.0 19.1
2021 06 18 18 41 49.6 -32 53 36 0.3683 1.3744 164.4 11.5 19.0
2021 06 19 18 42 03.9 -32 44 54 0.3623 1.3695 165.2 10.9 18.9
...
2021 06 25 18 43 08.8 -31 40 59 0.3291 1.3414 169.6 7.9 18.6
...
2021 07 03 18 44 02.1 -29 40 09 0.2915 1.3067 173.3 5.2 18.1
...
2021 07 18 18 47 21.5 -23 48 52 0.2416 1.2516 165.5 11.7 17.9
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-M42
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