[Iaude] MPEC L91: 2021 UB12 [a=2.13,e=0.42,i=6.1,H=20.12]
mpec at cfa.harvard.edu
mpec at cfa.harvard.edu
Sat Jun 8 10:14:57 EDT 2024
M.P.E.C. 2024-L91 Issued 2024 June 8, 14:13 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 UB12
Revision to MPEC 2021-V128
Additional Observations:
K21U12B C2018 12 12.48438904 52 07.122+25 42 04.14 22.01GVEL091F51
K21U12B C2018 12 12.49690604 52 06.060+25 42 04.21 22.53GVEL091F51
K21U12B KC2024 06 06.67954423 00 04.642-15 41 41.53 21.5 GVEL091474
K21U12B KC2024 06 06.68435123 00 05.762-15 41 37.32 21.7 GVEL091474
K21U12B KC2024 06 06.68915523 00 06.907-15 41 33.07 21.7 GVEL091474
K21U12B 2C2024 06 07.16650223 02 00.196-15 34 52.72 21.0 GVEL091J04
K21U12B 2C2024 06 07.18878723 02 05.412-15 34 34.22 21.2 GVEL091J04
K21U12B KC2024 06 07.64372023 03 53.006-15 27 41.54 21.1 GVEL091474
K21U12B KC2024 06 07.64852423 03 54.096-15 27 36.68 21.0 GVEL091474
K21U12B KC2024 06 07.65333123 03 55.253-15 27 33.26 20.5 GVEL091474
K21U12B KC2024 06 07.65813723 03 56.381-15 27 27.86 21.1 GVEL091474
Observer details:
474 Mount John Observatory, Lake Tekapo. Observers A. C. Gilmore, P. M.
Kilmartin. Measurer P. M. Kilmartin. 1.0-m f/7.7 Reflector + CCD.
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.
J04 ESA Optical Ground Station, Tenerife. Observers D. Abreu, M. Micheli, F.
Ocana, L. Conversi. Measurers M. Micheli, R. Kresken, F. Ocana.
1.0-m f/4.4 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
181212 F51 0.03- 0.01- 240607 474 0.07- 0.04- MPO666459 +0.02 days
Orbital elements:
2021 UB12 Earth MOID = 0.2406 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5 Veres
M 328.19706 (2000.0) P Q
n 0.31723538 Peri. 254.81134 +0.70181953 +0.70635027
a 2.1291927 Node 60.14539 -0.60589215 +0.66003783
e 0.4240466 Incl. 6.10894 -0.37462522 +0.25577209
P 3.11 H 20.12 G 0.15 U 2
Residuals in seconds of arc
181212 F51 0.3- 0.2- 211104 H21 0.1- 0.1+ 211128 I52 0.2+ 1.0-
181212 F51 0.4+ 0.0 211104 H21 0.1+ 0.2+ 211128 I52 0.7- 0.5-
211031 F52 0.0 0.1+ 211107 H21 0.3+ 0.3+ 211128 F52 0.2- 0.1+
211031 F52 0.1+ 0.1+ 211107 H21 0.2+ 0.4+ 211128 F52 0.1+ 0.3+
211031 F52 0.2+ 0.2- 211107 F52 0.1- 0.0 240606 474 0.2- 0.1+
211031 F52 0.1+ 0.0 211107 F52 0.1- 0.2- 240606 474 0.2- 0.2+
211101 H21 0.1- 0.2- 211107 F52 0.1+ 0.0 240606 474 0.2+ 0.3+
211101 H21 0.1- 0.0 211113 V06 0.2- 0.1- 240607 J04 0.0 0.5+
211102 291 0.1+ 0.2- 211113 V06 0.1- 0.1- 240607 J04 0.4+ 0.1-
211102 291 0.2- 0.4- 211113 V06 0.3- 0.1- 240607 474 0.0 0.7-
211102 291 0.1+ 0.1- 211113 V06 (1.7+ 0.1+) 240607 474 0.5- 0.0
211103 H21 0.2+ 0.0 211128 I52 0.6- 0.7- 240607 474 0.0 0.7-
211103 H21 0.0 0.0 211128 F52 0.1- 0.1+ 240607 474 0.1+ 0.5+
Ephemeris:
2021 UB12 a,e,i = 2.13, 0.42, 6 q = 1.2263
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2024 05 09 21 06 59.5 -21 05 17 0.8300 1.3675 95.6 47.3 22.2
...
2024 05 24 22 05 39.8 -18 40 55 0.7309 1.3103 96.1 50.2 21.9
...
2024 06 01 22 37 31.7 -17 00 58 0.6896 1.2848 96.0 51.7 21.8
...
2024 06 07 23 01 20.0 -15 37 11 0.6637 1.2684 95.9 52.7 21.7
2024 06 08 23 05 16.5 -15 22 36 0.6598 1.2659 95.9 52.9 21.7
2024 06 09 23 09 12.5 -15 07 52 0.6560 1.2635 95.8 53.1 21.7
...
2024 06 15 23 32 32.8 -13 36 35 0.6354 1.2504 95.7 53.9 21.6
...
2024 06 23 00 02 44.7 -11 29 37 0.6135 1.2372 95.6 54.8 21.5
...
2024 07 08 00 55 10.2 -07 30 54 0.5856 1.2264 96.1 55.5 21.4
A. U. Tomatic (C) Copyright 2024 MPC M.P.E.C. 2024-L91
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