[Iaude] MPEC A52: 2021 LJ4 [a=0.68,e=0.38,i=9.8,H=20.11]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Fri Jan 5 09:14:00 EST 2024
M.P.E.C. 2024-A52 Issued 2024 January 5, 14:12 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets, routine data on comets and natural satellites,
and occasional editorial announcements. 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2021 LJ4
Revision to MPEC 2021-L125
Additional Observations:
K21L04J C2016 03 05.23314702 30 25.918+11 19 32.70 21.30GVEA052F51
K21L04J C2016 03 05.23722002 30 27.254+11 19 36.02 21.65GVEA052F51
K21L04J C2016 03 05.24132702 30 28.642+11 19 39.43 21.21GVEA052F51
K21L04J C2016 03 05.24542102 30 30.000+11 19 42.77 21.73GVEA052F51
K21L04J 0C2022 05 09.23858805 57 57.876+19 18 18.09 22.34GVEA052T14
K21L04J 0C2022 05 24.24823806 58 10.562+17 34 14.70 22.23GVEA052T14
K21L04J 0C2022 12 14.65994013 38 56.004-17 34 41.43 21.85GVEA052T14
K21L04J 0C2022 12 14.66091913 38 56.207-17 34 42.96 22.25GVEA052T14
K21L04J KC2024 01 03.50863514 06 50.648-23 34 49.87 20.85GVEA052I52
K21L04J KC2024 01 03.51638214 06 51.653-23 35 03.55 21.05GVEA052I52
K21L04J KC2024 01 03.52413514 06 52.664-23 35 19.18 21.03GVEA052I52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Herman, T. Lowe, P. Minguez, A.
Schultz, I. Smith. Measurers K. Chambers, T. de Boer, J. Fairlamb, H.
Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
Weryk. 1.8-m Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer R. A. Kowalski.
Measurers E. C. Beshore, D. Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs,
A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M. Larson, G.
J. Leonard, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos. 1.0-m
prime focus + CCD.
T14 Canada-France-Hawaii Telescope, Maunakea. Observers L. Wells, H.
Januszewski. Measurer D. J. Tholen. 3.6-m f/4.1 reflector + 1024 x 2306
pixels Megacam.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
160305 F51 3.80+ 0.08+ 240103 I52 0.14+ 0.17+ MPO740961 -1.72 days
Orbital elements:
2021 LJ4 Earth MOID = 0.1288 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 297.16310 (2000.0) P Q
n 1.77232307 Peri. 56.60037 +0.88805575 +0.42747987
a 0.6762503 Node 277.58348 -0.45770638 +0.78756690
e 0.3820430 Incl. 9.82626 -0.04314910 +0.44384608
P 0.56 H 20.11 G 0.15 U 2
Residuals in seconds of arc
160305 F51 0.2+ 0.2+ 210609 T14 0.2+ 0.0 210612 W84 0.1+ 0.0
160305 F51 0.2- 0.1+ 210609 T14 0.0 0.0 220509 T14 0.0 0.0
160305 F51 0.0 0.0 210609 807 0.2- 0.0 220524 T14 0.0 0.0
160305 F51 0.2- 0.0 210609 807 0.1- 0.3- 221214 T14 0.0 0.0
210606 807 0.2- 0.1+ 210611 T14 0.1- 0.0 221214 T14 0.0 0.0
210606 807 0.1- 0.0 210611 T14 0.1- 0.0 240103 I52 0.0 0.0
210606 807 0.0 0.1- 210611 T14 0.0 0.0 240103 I52 0.2+ 0.3+
210608 807 0.1+ 0.0 210612 W84 0.0 0.0 240103 I52 0.4+ 1.4-
210608 807 0.1+ 0.3- 210612 W84 0.1+ 0.0
Ephemeris:
2021 LJ4 a,e,i = 0.68, 0.38, 10 q = 0.4179
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 12 06 13 33 09.7 -10 50 44 0.4801 0.7517 47.7 104.1 21.7
...
2023 12 21 13 42 48.4 -17 07 52 0.5005 0.8406 58.7 90.7 21.4
...
2023 12 29 13 55 32.1 -20 53 03 0.5020 0.8761 62.8 86.6 21.4
...
2024 01 04 14 07 56.3 -23 49 12 0.4990 0.8972 65.2 84.4 21.3
2024 01 05 14 10 14.3 -24 19 04 0.4982 0.9002 65.6 84.1 21.3
2024 01 06 14 12 36.5 -24 49 03 0.4973 0.9032 66.0 83.9 21.3
...
2024 01 12 14 28 17.5 -27 51 05 0.4903 0.9180 67.8 82.6 21.3
...
2024 01 20 14 53 31.1 -31 56 36 0.4774 0.9304 69.4 81.9 21.2
...
2024 02 04 15 58 30.7 -39 14 08 0.4486 0.9314 69.8 83.3 21.1
A. U. Tomatic (C) Copyright 2024 MPC M.P.E.C. 2024-A52
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