[Iaude] MPEC X75: 2021 WB2 [a=1.58,e=0.57,i=4.6,H=24.58]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Tue Dec 5 09:57:26 EST 2023
M.P.E.C. 2023-X75 Issued 2023 December 5, 14:55 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 WB2
Revision to MPEC 2021-W98
Additional Observations:
K21W02B C2023 11 22.25244 05 17 27.61 +57 31 43.2 18.8 GVEX075703
K21W02B C2023 11 22.25835 05 17 15.14 +57 28 36.1 18.6 GVEX075703
K21W02B 1C2023 12 03.28719704 12 32.782+24 55 10.85 20.67GVEX075G96
K21W02B 1C2023 12 03.29234604 12 32.386+24 54 55.58 20.80GVEX075G96
K21W02B 1C2023 12 03.30262804 12 31.547+24 54 24.77 20.41GVEX075G96
K21W02B KC2023 12 03.41105104 12 22.932+24 48 57.06 21.09GVEX075I52
K21W02B KC2023 12 03.41252804 12 22.813+24 48 52.85 22.08GVEX075I52
K21W02B KC2023 12 03.41401104 12 22.759+24 48 48.10 21.01GVEX075I52
K21W02B KC2023 12 03.41549204 12 22.633+24 48 43.74 20.86GVEX075I52
Observer details:
703 Catalina Sky Survey. Observer J. K. Hogan. Measurers B. Gray, D. Rankin,
F. C. Shelly. 0.68-m Schmidt + 10K CCD.
G96 Mt. Lemmon Survey. Observer H. Groeller. 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. 1.5-m reflector + 10K 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.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
231122 703 39+ 0+ 231203 I52 8+ 0+ MPO782776 +1.17 days
Orbital elements:
2021 WB2 Earth MOID = 0.0049 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 350.93940 (2000.0) P Q
n 0.49454266 Peri. 80.39126 +0.90990912 +0.40743409
a 1.5836780 Node 255.53214 -0.40510005 +0.83244663
e 0.5658155 Incl. 4.61239 -0.08921513 +0.37553972
P 1.99 H 24.58 G 0.15 U 0
Residuals in seconds of arc
211127 703 0.1- 0.2+ 211128 I93 0.1- 0.0 211208 291 0.1+ 0.3+
211127 703 0.9+ 0.1+ 211128 033 0.5- 0.3+ 211208 291 0.4+ 0.2-
211127 703 1.6- 0.5+ 211128 033 0.0 0.0 211209 H21 0.4- 0.1+
211128 G96 0.0 0.1- 211128 033 0.1- 0.3+ 211209 H21 0.3- 0.1-
211128 G96 0.0 0.1+ 211129 858 0.2- 0.0 211209 H21 0.3- 0.2+
211128 G96 0.2+ 0.2- 211129 H21 0.0 0.1+ 231122 703 0.5- 0.6-
211128 G96 0.2- 0.1- 211129 H21 0.1+ 0.3+ 231122 703 0.4+ 0.8+
211128 734 0.2+ 0.2- 211129 H21 0.1+ 0.1+ 231203 G96 0.3- 0.1+
211128 734 0.3+ 1.4- 211129 858 0.2+ 0.2+ 231203 G96 0.1+ 0.2+
211128 734 0.5+ 0.2+ 211129 858 0.3- 0.4- 231203 G96 0.3+ 0.2+
211128 734 1.2+ 0.1- 211201 I52 0.1- 0.2+ 231203 I52 0.2- 0.3-
211128 204 0.0 0.1+ 211201 I52 0.1- 0.2+ 231203 I52 0.3- 0.0
211128 204 0.1- 0.1- 211201 I52 0.2- 0.6- 231203 I52 0.4+ 0.2-
211128 I93 0.0 0.4+ 211201 I52 0.1- 0.1- 231203 I52 0.2+ 0.1-
211128 I93 0.1+ 0.1- 211208 291 0.2+ 0.1+
Ephemeris:
2021 WB2 a,e,i = 1.58, 0.57, 5 q = 0.6876
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 11 05 15 47 06.2 -02 45 24 0.1405 0.8622 21.2 155.4 29.6
...
2023 11 20 10 30 04.1 +75 55 12 0.02874 0.9965 105.9 72.6 19.4
...
2023 11 28 04 21 17.8 +31 47 07 0.08599 1.0713 169.2 9.9 20.0
...
2023 12 04 04 11 54.2 +24 21 35 0.1426 1.1275 173.5 5.7 21.1
2023 12 05 04 11 07.1 +23 39 19 0.1524 1.1368 172.5 6.5 21.3
2023 12 06 04 10 27.3 +23 02 06 0.1623 1.1462 171.5 7.3 21.5
...
2023 12 12 04 08 15.8 +20 29 56 0.2237 1.2018 164.6 12.6 22.5
...
2023 12 20 04 08 27.5 +18 49 27 0.3113 1.2748 156.1 18.2 23.5
...
2024 01 04 04 14 50.8 +17 47 40 0.4943 1.4066 142.1 25.4 25.0
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-X75
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