MPEC 2021-A161 : 2021 AL5
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M.P.E.C. 2021-A161 Issued 2021 January 13, 13:34 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. 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 AL5
Observations:
K21A05L C2021 01 04.44545 08 13 09.33 +33 50 40.5 21.8 GVEA161G96
K21A05L C2021 01 04.45589 08 13 11.95 +33 51 04.1 21.4 GVEA161G96
K21A05L C2021 01 06.34266 08 21 33.59 +35 03 25.7 21.9 GVEA161G96
K21A05L C2021 01 06.34792 08 21 34.86 +35 03 38.6 21.3 GVEA161G96
K21A05L C2021 01 06.35848 08 21 37.55 +35 04 02.9 21.0 GVEA161G96
K21A05L* C2021 01 12.46176208 51 26.695+38 49 35.16 21.78wUEA161F51
K21A05L C2021 01 12.47313908 51 29.975+38 49 59.25 21.06wUEA161F51
K21A05L C2021 01 12.48454408 51 33.245+38 50 23.02 22.04wUEA161F51
K21A05L C2021 01 12.49594708 51 36.547+38 50 47.12 21.96wUEA161F51
K21A05L KC2021 01 13.29041008 55 49.18 +39 17 52.3 21.39GVEA161I52
K21A05L KC2021 01 13.29808908 55 51.46 +39 18 08.9 21.96GVEA161I52
K21A05L !C2021 01 13.30323 08 55 53.38 +39 18 16.6 21.0 RVEA161673
K21A05L KC2021 01 13.30576708 55 53.76 +39 18 24.7 21.85GVEA161I52
K21A05L !C2021 01 13.31746 08 55 57.60 +39 18 46.6 VEA161673
Observer details:
673 Table Mountain Observatory, Wrightwood. Observer J. Pittichova. 1.0-m
f/15 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, M.
Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers G. J. Leonard, K. W. Wierzchos. Measurers
D. Rankin, B. Gray, F. C. Shelly. 1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer E. J. Christensen.
Measurers E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D.
Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A.
Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos. 1.0-m
reflector + CCD.
Orbital elements:
2021 AL5 Earth MOID = 0.1670 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 348.34697 (2000.0) P Q
n 0.27816016 Peri. 41.87962 -0.63116854 -0.76645430
a 2.3241961 Node 87.60868 +0.67624699 -0.61893946
e 0.5129090 Incl. 6.84355 +0.37988982 -0.17164423
P 3.54 H 24.1 G 0.15 U 8
Residuals in seconds of arc
210104 G96 0.9- 0.2- 210112 F51 0.0 0.0 210113 I52 0.0 0.4+
210104 G96 0.4+ 0.1+ 210112 F51 0.0 0.0 210113 673 0.4+ 0.3+
210106 G96 0.5+ 0.4- 210112 F51 0.2- 0.2- 210113 I52 0.2+ 0.1+
210106 G96 0.1- 0.3+ 210112 F51 0.0 0.0 210113 673 0.1+ 0.3+
210106 G96 0.4+ 0.3+ 210113 I52 0.0 0.0
Ephemeris:
2021 AL5 a,e,i = 2.32, 0.51, 7 q = 1.1321
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 12 14 07 04 55.6 +22 19 32 0.2748 1.2423 157.2 17.9 22.7
...
2020 12 29 07 47 57.0 +29 49 09 0.2083 1.1831 161.9 15.0 21.9
...
2021 01 06 08 20 00.3 +34 50 16 0.1861 1.1599 160.0 16.9 21.7
...
2021 01 12 08 49 01.7 +38 33 08 0.1756 1.1469 156.7 19.9 21.6
2021 01 13 08 54 15.1 +39 07 53 0.1744 1.1451 156.0 20.4 21.6
2021 01 14 08 59 34.3 +39 41 36 0.1733 1.1434 155.4 21.0 21.6
...
2021 01 20 09 33 03.3 +42 35 28 0.1696 1.1358 151.3 24.5 21.7
...
2021 01 28 10 18 26.9 +44 49 51 0.1717 1.1321 146.6 28.6 21.8
...
2021 02 12 11 25 06.9 +44 10 32 0.1920 1.1454 142.5 31.6 22.2
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-A161
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