MPEC 2023-C21 : 2018 LH1
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M.P.E.C. 2023-C21 Issued 2023 February 2, 14:05 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@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2018 LH1
Revision to MPEC 2018-L27
Additional Observations:
K18L01H KC2023 01 29.08212822 46 20.788+18 36 17.21 20.57GVEC021I52
K18L01H KC2023 01 29.08676422 46 21.857+18 36 54.29 20.62GVEC021I52
K18L01H KC2023 01 29.09139822 46 22.955+18 37 31.66 20.87GVEC021I52
K18L01H 7C2023 01 31.80157722 56 57.984+24 28 37.46 20.8 GVEC021Z84
K18L01H 7C2023 01 31.82205722 57 02.801+24 31 11.63 21.1 GVEC021Z84
Observer details:
I52 Steward Observatory, Mt. Lemmon Station. Observer R. A. Kowalski.
Measurers E. J. Christensen, 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, A. Serrano, F. C. Shelly,
K. W. Wierzchos. 1.0-m prime focus + CCD.
Z84 Calar Alto-Schmidt. Observers F. Ocana, M. Micheli, R. Kresken, L.
Conversi, E. Schwab. Measurers F. Ocana, M. Micheli. 0.8-m f/3 Schmidt
+ CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
230129 I52 0.07- 0.56- 230131 Z84 0.07- 0.54- MPO451961 +0.26 days
Orbital elements:
2018 LH1 Earth MOID = 0.2051 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 12.14332 (2000.0) P Q
n 0.22838295 Peri. 306.65427 +0.78439895 -0.06564352
a 2.6506981 Node 65.44216 +0.48974328 +0.67574645
e 0.8451091 Incl. 42.69644 -0.38061768 +0.73420546
P 4.32 H 19.82 G 0.15 U 1
Residuals in seconds of arc
180521 F51 0.0 0.1+ 180607 807 0.6+ 0.3+ 180610 I52 0.1- 0.1+
180521 F51 0.0 0.0 180607 807 0.2+ 0.5+ 180610 I52 0.1- 0.2-
180604 F51 0.2+ 0.0 180607 691 0.1- 0.1+ 180612 691 0.3- 0.5-
180604 F51 0.0 0.0 180607 691 0.3+ 0.1- 180612 691 0.0 0.1+
180604 F51 0.2- 0.1- 180607 691 0.2- 0.1+ 180612 691 0.2+ 0.3-
180604 F51 0.0 0.2- 180607 I52 0.5- 0.3+ 180702 I52 0.0 0.4-
180606 F51 0.2- 0.0 180607 I52 0.1- 0.2- 180702 I52 0.0 0.5+
180606 F51 0.0 0.1- 180607 I52 0.2- 0.5+ 180702 I52 0.1+ 0.5+
180606 F51 0.1- 0.1- 180607 I52 0.3- 0.5+ 230129 I52 0.1- 0.4-
180606 F51 0.2- 0.1+ 180610 691 0.2- 0.1+ 230129 I52 0.2- 0.2-
180606 F51 0.0 0.0 180610 691 0.0 0.0 230129 I52 0.2+ 0.3+
180606 F51 0.1- 0.2- 180610 691 1.0- 0.3- 230131 Z84 0.1- 0.1+
180606 F51 0.0 0.0 180610 I52 0.5+ 0.1- 230131 Z84 0.1+ 0.2+
180607 807 0.2+ 0.2+ 180610 I52 0.3+ 0.2-
Ephemeris:
2018 LH1 a,e,i = 2.65, 0.85, 43 q = 0.4106
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 01 03 20 31 22.5 -31 55 27 1.0106 0.4106 23.7 74.4 20.5
...
2023 01 18 22 01 01.6 -06 48 59 0.7125 0.5473 33.0 101.9 21.5
...
2023 01 26 22 34 18.9 +11 37 09 0.6625 0.6745 43.0 94.8 21.5
...
2023 02 01 22 57 45.3 +24 53 32 0.6714 0.7744 51.6 85.6 21.4
2023 02 02 23 01 41.9 +26 57 14 0.6761 0.7911 53.0 84.0 21.4
2023 02 03 23 05 40.5 +28 57 47 0.6815 0.8078 54.3 82.4 21.4
...
2023 02 09 23 30 33.4 +39 49 38 0.7281 0.9070 61.7 73.3 21.5
...
2023 02 17 00 08 11.4 +51 08 49 0.8175 1.0359 69.3 63.1 21.7
...
2023 03 04 01 40 48.2 +64 23 29 1.0307 1.2649 77.4 49.9 22.3
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