MPEC 2023-P84 : 2020 UL1
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M.P.E.C. 2023-P84 Issued 2023 August 15, 14:06 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
2020 UL1
Revision to MPEC 2020-U104
Additional Observations:
K20U01L C2015 10 10.34155500 34 22.963+04 16 33.67 23.53GVEP084F51
K20U01L C2015 10 10.36544900 34 20.876+04 16 14.38 22.87GVEP084F51
K20U01L C2015 10 10.37746000 34 19.835+04 16 04.48 22.75GVEP084F51
K20U01L C2015 10 12.37199700 31 29.511+03 48 38.49 23.18GVEP084F51
K20U01L C2015 10 12.40585400 31 26.511+03 48 10.46 23.16GVEP084F51
K20U01L 0C2023 08 10.26435313 52 30.553+09 21 43.21 22.43GVEP084T12
K20U01L 0C2023 08 11.24995913 58 29.507+08 55 39.48 22.57GVEP084T12
K20U01L 0C2023 08 11.27043613 58 36.844+08 55 06.94 22.48GVEP084T12
K20U01L 0C2023 08 11.27285813 58 37.711+08 55 03.00 22.58GVEP084T12
K20U01L 0C2023 08 11.27578913 58 38.762+08 54 58.28 22.48GVEP084T12
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.
T12 University of Hawaii 88-inch telescope, Maunakea. Observers D. J. Tholen,
D. Hung. Measurer D. J. Tholen. 2.24-m f/10.1 reflector + 2112 x 2112
pixels STA1600 10k CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
151010 F51 14.3- 2.2- 230811 T12 31.2- 0.1- MPO600173 +0.01 days
Orbital elements:
2020 UL1 Earth MOID = 0.2455 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 36.04576 (2000.0) P Q
n 0.41880885 Peri. 335.42784 -0.97643990 -0.20549549
a 1.7692620 Node 193.22859 +0.21235153 -0.96930341
e 0.6950056 Incl. 16.72490 -0.03836609 -0.13499071
P 2.35 H 20.21 G 0.15 U 1
Residuals in seconds of arc
151010 F51 0.2- 0.3- 201028 I52 0.4- 0.1+ 201203 691 0.5+ 0.2-
151010 F51 0.1- 0.1+ 201028 I52 0.0 0.4+ 201203 691 (2.8+ 0.9+)
151010 F51 0.1+ 0.1+ 201103 I52 0.5+ 0.4+ 201205 691 0.2- 0.1+
151012 F51 0.3+ 0.4+ 201103 I52 0.8+ 0.2+ 201205 807 0.1+ 0.1-
151012 F51 0.2- 0.4+ 201110 807 0.3+ 0.3- 201205 807 0.0 0.1-
201009 F51 0.1- 0.0 201110 807 0.3+ 0.1+ 201205 691 1.1- 0.1+
201009 F51 0.2+ 0.0 201110 807 0.0 0.3+ 201205 807 0.1- 0.1+
201009 F51 0.1+ 0.2+ 201110 474 0.0 0.3- 201205 691 0.4+ 0.6-
201014 F52 0.7+ 0.0 201110 474 0.1- 0.3- 201206 I52 0.2+ 0.3-
201014 F52 0.0 0.0 201110 474 0.1+ 0.2- 201206 I52 0.1- 0.1-
201014 F52 0.1+ 0.1- 201111 807 0.1+ 0.0 201206 I52 0.8- 1.5-
201014 F52 0.1- 0.0 201111 807 0.0 0.2- 201206 I52 0.2+ 0.1-
201016 G96 0.3+ 0.4- 201111 807 0.2+ 0.4- 201214 807 0.0 0.0
201016 G96 0.1- 0.2- 201111 I52 0.1- 0.1- 201214 807 0.2+ 0.1+
201016 G96 0.1+ 0.1- 201111 I52 0.1- 0.1+ 201214 807 0.0 0.2+
201016 G96 0.0 0.0 201111 I52 0.1+ 0.1+ 201217 807 0.1- 0.0
201016 V06 0.0 0.0 201111 I52 0.1- 0.0 201217 807 0.1- 0.1-
201016 V06 0.0 0.1+ 201115 807 0.0 0.0 201217 807 0.1- 0.2-
201016 V06 0.1- 0.2+ 201115 807 0.2- 0.1+ 201220 807 0.1+ 0.1-
201017 V06 0.0 0.1+ 201115 807 0.2- 0.0 201220 807 0.1+ 0.2-
201017 V06 0.2+ 0.1- 201120 691 0.6- 0.4- 201220 807 0.3+ 0.3-
201017 V06 0.2+ 0.0 201120 691 0.1+ 0.0 201224 807 0.1+ 0.0
201017 V06 0.1- 0.1- 201120 691 0.1- 0.1+ 201224 807 0.0 0.2+
201018 V06 0.4- 0.3- 201120 F51 0.1+ 0.0 201224 807 0.1+ 0.3-
201018 V06 0.5- 0.1+ 201120 F51 0.0 0.0 201225 807 0.2+ 0.1-
201018 V06 0.1+ 0.2+ 201120 F51 0.1+ 0.0 201225 807 0.1+ 0.0
201019 V06 0.2+ 0.5+ 201126 807 0.0 0.2+ 201225 807 0.0 0.1+
201019 V06 0.2- 0.2- 201126 807 0.4- 0.4+ 230810 T12 0.1- 0.2-
201024 F52 0.1+ 0.2+ 201126 807 0.3- 0.2+ 230811 T12 0.0 0.1-
201024 F52 0.0 0.1+ 201202 I52 0.3+ 0.8+ 230811 T12 0.0 0.0
201028 I52 0.2+ 0.3- 201202 I52 0.3- 0.9+ 230811 T12 0.0 0.1-
201028 I52 0.6- 0.8- 201202 I52 0.5+ 1.3+ 230811 T12 0.0 0.2-
Ephemeris:
2020 UL1 a,e,i = 1.77, 0.70, 17 q = 0.5396
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 07 16 10 52 00.0 +18 07 32 0.8646 0.7386 45.4 78.3 22.0
...
2023 07 31 12 44 24.6 +13 43 40 0.8314 0.9229 59.0 70.5 22.1
...
2023 08 08 13 38 23.1 +10 21 34 0.8632 1.0224 65.4 64.4 22.2
...
2023 08 14 14 14 38.8 +07 43 19 0.9064 1.0960 69.4 59.9 22.3
2023 08 15 14 20 19.5 +07 17 14 0.9150 1.1081 69.9 59.2 22.4
2023 08 16 14 25 54.0 +06 51 20 0.9240 1.1202 70.5 58.5 22.4
...
2023 08 22 14 57 15.8 +04 21 22 0.9850 1.1917 73.3 54.4 22.5
...
2023 08 30 15 34 00.3 +01 21 06 1.0828 1.2843 75.6 49.6 22.8
...
2023 09 14 16 30 41.0 -03 07 29 1.3027 1.4491 76.6 42.5 23.2
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-P84
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