MPEC 2023-L49 : 2021 LL2
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M.P.E.C. 2023-L49 Issued 2023 June 10, 14:08 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
2021 LL2
Revision to MPEC 2021-L86
Additional Observations:
K21L02L C2015 01 22.60915112 31 30.205-09 00 24.52 23.11GVEL049F51
K21L02L C2015 01 22.62041712 31 29.446-09 00 21.59 23.47GVEL049F51
K21L02L C2015 01 22.64298212 31 27.876-09 00 15.18 23.02GVEL049F51
K21L02L KC2015 01 23.53980012 30 29.177-08 55 56.48 23.38GVEL049F51
K21L02L 0C2023 05 14.49643215 19 38.118-17 38 19.09 24.01GVEL049T14
K21L02L 0C2023 05 14.50111215 19 37.596-17 38 16.91 23.85GVEL049T14
K21L02L 0C2023 05 14.50580015 19 37.079-17 38 14.60 24.22GVEL049T14
K21L02L 0C2023 05 15.45677015 17 53.414-17 30 36.73 24.24GVEL049T14
K21L02L 0C2023 05 15.46188215 17 52.849-17 30 34.31 24.22GVEL049T14
K21L02L 0C2023 05 15.46656115 17 52.323-17 30 32.08 24.08GVEL049T14
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, P.
Minguez, A. Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M.
Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien +
CCD.
T14 Canada-France-Hawaii Telescope, Maunakea. Observer C. Cunningham.
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
150122 F51 0.06+ 0.00+ 230515 T14 0.04+ 0.01+ E2021-M72 +0.03 days
Orbital elements:
2021 LL2 PHA, Earth MOID = 0.0458 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 243.85441 (2000.0) P Q
n 0.43426852 Peri. 159.67648 +0.90527555 -0.42305966
a 1.7270191 Node 225.41380 +0.38187984 +0.85027994
e 0.7142610 Incl. 3.11390 +0.18612887 +0.31312065
P 2.27 H 21.62 G 0.15 U 1
Residuals in seconds of arc
150122 F51 0.1+ 0.0 210608 568 0.0 0.0 210618 I52 0.5+ 0.3-
150122 F51 0.2+ 0.2- 210608 568 0.0 0.1+ 210619 I52 0.1- 0.2-
150122 F51 0.2- 0.0 210610 I52 0.1+ 0.4- 210619 I52 0.0 0.1-
150123 F51 0.1- 0.2+ 210610 I52 0.1+ 0.0 210619 I52 0.5+ 0.4+
210523 F51 0.1- 0.2+ 210610 I52 0.1- 0.0 210621 G96 0.3+ 0.3+
210523 F51 0.0 0.1+ 210610 I52 0.3+ 0.2- 210621 G96 0.5+ 0.3+
210523 F51 0.2- 0.0 210612 807 0.7+ 0.1- 210621 G96 0.2+ 0.2+
210524 F51 0.3+ 0.1+ 210612 807 0.1+ 0.3+ 210621 G96 0.0 0.2+
210524 F51 0.6- 0.2- 210612 807 0.4+ 0.1+ 210621 F51 (2.1- 1.0-)
210524 F51 0.1+ 0.4+ 210614 I52 1.0- 0.5- 210621 F51 1.5- 0.7-
210603 F51 0.2- 0.1- 210614 I52 1.0- 1.5- 210621 F51 1.3- 0.7-
210603 F51 0.0 0.3+ 210614 I52 0.3- 0.2+ 210622 I52 0.2- 0.3+
210607 F51 0.1+ 0.1+ 210614 I52 0.7+ 1.5- 210622 I52 0.2+ 0.3-
210607 F51 0.1+ 0.0 210614 F51 0.5+ 0.3+ 210622 I52 0.6+ 0.0
210607 F51 0.4+ 0.3+ 210614 F51 0.0 0.1+ 230514 T14 0.0 0.0
210608 L01 1.1- 0.6- 210614 F51 0.1+ 0.2+ 230514 T14 0.0 0.1-
210608 L01 1.2- 0.3- 210614 F51 0.2- 0.0 230514 T14 0.0 0.1-
210608 L01 0.6- 0.8- 210615 I52 0.1- 0.7- 230515 T14 0.1- 0.0
210608 L01 0.1+ 0.0 210615 I52 0.2- 0.1- 230515 T14 0.0 0.0
210608 568 0.0 0.0 210615 I52 0.0 0.3+ 230515 T14 0.0 0.1-
210608 568 0.1- 0.0 210618 I52 0.8+ 1.2+
Ephemeris:
2021 LL2 a,e,i = 1.73, 0.71, 3 q = 0.4935
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 05 11 15 25 52.6 -18 05 17 1.3219 2.3303 176.0 1.7 24.3
...
2023 05 26 14 58 22.5 -16 00 15 1.2486 2.2356 162.6 7.8 24.4
...
2023 06 03 14 44 07.9 -14 49 28 1.2373 2.1818 151.3 12.9 24.5
...
2023 06 09 14 34 23.8 -13 58 42 1.2399 2.1398 143.0 16.6 24.6
2023 06 10 14 32 52.7 -13 50 37 1.2412 2.1327 141.7 17.2 24.6
2023 06 11 14 31 23.6 -13 42 39 1.2427 2.1255 140.3 17.7 24.7
...
2023 06 17 14 23 14.5 -12 58 03 1.2559 2.0817 132.5 21.1 24.7
...
2023 06 25 14 14 36.1 -12 08 59 1.2829 2.0209 122.6 25.1 24.8
...
2023 07 10 14 05 38.4 -11 14 20 1.3497 1.8997 105.9 31.0 25.0
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-L49
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