[Iaude] MPEC M21: 2021 LJ9 [a=1.31,e=0.19,i=16.3,H=23.89]
mpec at cfa.harvard.edu
mpec at cfa.harvard.edu
Tue Jun 18 13:46:04 EDT 2024
M.P.E.C. 2024-M21 Issued 2024 June 18, 17:44 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 LJ9
Revision to MPEC 2021-M43
Additional Observations:
K21L09J C2018 06 18.27074414 05 11.454-34 14 29.45 20.77GVEM021F51
K21L09J C2024 06 18.56319322 06 33.040-01 15 17.55 21.15wXEM021F52
K21L09J C2024 06 18.57371622 06 33.819-01 13 43.89 21.51wXEM021F52
K21L09J C2024 06 18.58419922 06 34.579-01 12 09.23 21.64wXEM021F52
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.
F52 Pan-STARRS 2, 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.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
180618 F51 1.89- 0.64- 240618 F52 1.21- 0.85- E2021-NB0 +0.32 days
Orbital elements:
2021 LJ9 Earth MOID = 0.0651 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5 Veres
M 291.10134 (2000.0) P Q
n 0.66069995 Peri. 28.30624 +0.45172343 +0.84677019
a 1.3055691 Node 269.78136 -0.86235305 +0.33370495
e 0.1853998 Incl. 16.31632 -0.22867698 +0.41427195
P 1.49 H 23.89 G 0.15 U 0
Residuals in seconds of arc
180618 F51 0.1+ 0.2- 210615 Y00 0.1- 0.1+ 210627 I52 0.0 0.4-
210614 W94 0.3+ 0.2- 210617 W95 0.1- 0.1- 210627 I52 0.1+ 0.0
210614 W94 0.1- 0.3- 210617 W95 0.1+ 0.0 210627 I52 0.1- 0.2+
210614 W94 0.1- 0.1- 210617 W95 0.3- 0.0 210704 033 0.0 0.1-
210614 W95 0.4- 0.1- 210617 E23 1.0+ 0.3+ 210704 033 0.2+ 0.1+
210614 W95 0.1+ 0.0 210617 E23 0.3+ 0.4+ 210704 033 0.3+ 0.3-
210614 W95 0.1+ 0.1- 210619 I52 0.6- 0.1- 210712 033 0.6+ 0.0
210614 474 0.2- 0.3- 210619 I52 0.3- 0.1+ 210712 033 0.2+ 0.3-
210614 474 0.4- 0.2- 210619 I52 0.4- 0.2- 210712 033 0.0 0.2-
210614 474 0.4- 0.2- 210619 I52 0.2- 0.2+ 240618 F52 0.1+ 0.1+
210614 474 0.0 0.0 210625 203 0.1- 0.4+ 240618 F52 0.2+ 0.4-
210615 Y00 0.2- 0.3- 210625 203 0.4- 0.0 240618 F52 0.1+ 0.5+
210615 Y00 0.6- 0.4+ 210625 203 0.3- 0.2+
Ephemeris:
2021 LJ9 a,e,i = 1.31, 0.19, 16 q = 1.0635
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2024 05 19 20 43 36.2 -51 49 55 0.2370 1.1311 114.6 54.4 23.0
...
2024 06 03 21 33 21.9 -34 23 36 0.1700 1.1009 116.6 55.5 22.3
...
2024 06 11 21 52 28.1 -19 09 22 0.1459 1.0880 116.3 56.8 21.9
...
2024 06 17 22 03 54.2 -05 06 58 0.1364 1.0799 114.6 58.8 21.8
2024 06 18 22 05 35.9 -02 38 51 0.1357 1.0787 114.2 59.2 21.8
2024 06 19 22 07 14.3 -00 09 52 0.1353 1.0775 113.7 59.7 21.8
...
2024 06 25 22 15 58.3 +14 31 42 0.1375 1.0715 110.1 63.0 22.0
...
2024 07 03 22 24 52.0 +31 32 05 0.1522 1.0660 104.9 67.2 22.3
...
2024 07 18 22 33 57.7 +52 17 34 0.1993 1.0640 98.5 70.9 23.0
A. U. Tomatic (C) Copyright 2024 MPC M.P.E.C. 2024-M21
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