MPEC 2021-J87 : 2017 UD45
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M.P.E.C. 2021-J87 Issued 2021 May 7, 14:01 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
2017 UD45
Revision to MPEC 2017-V20
Additional Observations:
K17U45D KC2021 03 20.59249116 19 32.608-10 19 35.18 24.11GVEJ087F51
K17U45D C2021 04 07.58003416 31 03.287-05 09 39.24 22.46GVEJ087F51
K17U45D C2021 04 07.60518116 31 03.861-05 09 07.11 23.15GVEJ087F51
K17U45D C2021 04 07.61771216 31 04.149-05 08 51.30 22.88GVEJ087F51
K17U45D C2021 04 10.58427216 32 11.719-04 05 01.79 23.44GVEJ087F51
K17U45D C2021 04 10.59701216 32 11.930-04 04 44.84 22.32GVEJ087F51
K17U45D C2021 04 10.60975816 32 12.162-04 04 27.88 22.07GVEJ087F51
K17U45D C2021 04 10.62248616 32 12.379-04 04 10.77 21.83GVEJ087F51
K17U45D KC2021 05 06.35937616 30 32.22 +07 38 02.1 22.12GVEJ087V06
K17U45D KC2021 05 06.36175116 30 32.12 +07 38 06.6 21.97GVEJ087V06
K17U45D KC2021 05 06.36412716 30 32.03 +07 38 11.1 21.46GVEJ087V06
K17U45D KC2021 05 06.36650216 30 31.96 +07 38 15.7 22.47GVEJ087V06
K17U45D KC2021 05 07.39329616 30 00.68 +08 10 39.2 21.99GVEJ087V06
K17U45D KC2021 05 07.39763716 30 00.54 +08 10 47.0 22.08GVEJ087V06
K17U45D KC2021 05 07.40197716 30 00.36 +08 10 54.5 VEJ087V06
K17U45D KC2021 05 07.40631816 30 00.21 +08 11 02.2 VEJ087V06
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
V06 Catalina Sky Survey-Kuiper. Observer G. J. Leonard. 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. 1.55-m reflector +
1K CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
210320 F51 0.04- 0.01- 210507 V06 0.07- 0.02- MPO435142 -0.09 days
Orbital elements:
2017 UD45 Earth MOID = 0.3492 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 294.52811 (2000.0) P Q
n 0.23358961 Peri. 123.79886 +0.81623717 +0.54201020
a 2.6111613 Node 205.24885 -0.54637506 +0.83669461
e 0.5359646 Incl. 27.95455 +0.18769971 +0.07853072
P 4.22 H 19.7 G 0.15 U 2
Residuals in seconds of arc
170926 G96 0.4+ 0.2- 171106 807 0.3+ 0.5- 210407 F51 0.1- 0.4-
170926 G96 0.1- 0.4- 171110 691 0.1+ 0.4+ 210407 F51 0.0 0.2+
171016 G96 0.3+ 0.2- 171110 691 0.2- 0.1- 210407 F51 0.1+ 0.3+
171016 G96 0.6- 0.7+ 171110 691 0.4- 0.8- 210410 F51 0.1+ 0.1-
171016 G96 0.0 0.1+ 171115 807 0.0 0.0 210410 F51 0.1- 0.1-
171016 G96 0.3- 0.5- 171115 807 0.1- 0.0 210410 F51 0.0 0.1-
171020 F51 0.0 0.1+ 171115 807 0.5+ 0.1+ 210410 F51 0.1- 0.1+
171020 F51 0.3- 0.0 171116 H21 0.0 0.4- 210506 V06 0.4+ 0.1+
171030 F51 0.1+ 0.1+ 171116 H21 0.2+ 0.2- 210506 V06 0.1+ 0.1+
171030 F51 0.1+ 0.1+ 171117 H21 0.4- 0.1+ 210506 V06 0.1- 0.2+
171030 F51 0.1+ 0.0 171117 H21 0.1- 0.3- 210506 V06 0.0 0.3+
171101 807 0.3+ 0.0 171117 H21 0.4- 0.0 210507 V06 0.1+ 0.5+
171101 807 0.3+ 0.0 171215 807 0.1+ 0.1+ 210507 V06 0.3+ 0.1+
171101 807 0.1- 0.1- 171215 807 0.2+ 0.1+ 210507 V06 0.2- 0.6-
171106 807 0.2+ 0.3- 171215 807 0.2+ 0.1+ 210507 V06 0.2- 1.2-
171106 807 0.2- 0.2- 210320 F51 0.1- 0.3-
Ephemeris:
2017 UD45 a,e,i = 2.61, 0.54, 28 q = 1.2117
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 04 07 16 30 48.3 -05 21 39 1.3130 2.0874 128.4 22.1 23.0
...
2021 04 22 16 34 05.9 +00 35 31 1.1137 1.9873 139.4 19.2 22.4
...
2021 04 30 16 32 57.9 +04 22 54 1.0269 1.9335 143.8 17.9 22.1
...
2021 05 06 16 30 42.6 +07 26 47 0.9718 1.8930 145.8 17.4 21.9
2021 05 07 16 30 13.0 +07 58 15 0.9635 1.8863 146.0 17.4 21.9
2021 05 08 16 29 41.4 +08 29 54 0.9554 1.8795 146.1 17.4 21.9
...
2021 05 14 16 25 51.6 +11 42 09 0.9121 1.8389 146.0 17.9 21.8
...
2021 05 22 16 19 10.4 +15 57 01 0.8681 1.7849 143.2 19.8 21.6
...
2021 06 06 16 03 40.2 +23 03 22 0.8231 1.6846 132.6 26.3 21.6
A. U. Tomatic (C) Copyright 2021 MPC M.P.E.C. 2021-J87
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