MPEC 2020-V72 : 2019 YS4
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M.P.E.C. 2020-V72 Issued 2020 November 11, 18:40 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
2019 YS4
Revision to MPEC 2020-A02
Additional Observations:
K19Y04S C2013 12 07.46174206 29 51.681+11 29 06.19 22.29GVEV072F51
K19Y04S C2013 12 07.47627906 29 49.972+11 29 12.67 22.12GVEV072F51
K19Y04S C2013 12 07.49083606 29 48.236+11 29 19.18 22.17GVEV072F51
K19Y04S C2017 10 07.58462805 19 26.420-25 07 50.23 21.83GVEV072F51
K19Y04S C2017 10 07.59448305 19 25.090-25 07 57.18 21.37GVEV072F51
K19Y04S C2017 10 07.60427805 19 23.779-25 08 04.35 21.55GVEV072F51
K19Y04S C2017 12 10.33600602 39 43.455-15 21 54.94 22.09GVEV072F51
K19Y04S C2017 12 10.34763402 39 42.678-15 21 38.57 22.23GVEV072F51
K19Y04S C2017 12 10.35925202 39 41.911-15 21 22.31 21.70GVEV072F51
K19Y04S C2019 11 28.54292509 03 15.996+17 22 01.75 22.94GVEV072F51
K19Y04S C2019 11 28.55539109 03 16.428+17 22 07.11 21.83GVEV072F51
K19Y04S C2019 11 28.56791909 03 16.813+17 22 13.12 22.89GVEV072F51
K19Y04S C2019 11 28.58045609 03 17.215+17 22 18.47 22.14GVEV072F51
K19Y04S C2020 01 18.43590208 23 33.120+35 28 41.87 20.37GVEV072F52
K19Y04S C2020 01 28.32262007 49 59.071+41 07 54.84 19.96GVEV072F51
K19Y04S C2020 01 28.32529307 49 58.434+41 08 00.00 20.52GVEV072F51
K19Y04S C2020 10 14.56742805 49 26.519-04 58 17.64 22.22GVEV072F52
K19Y04S C2020 10 14.57893305 49 26.060-04 58 21.99 22.17GVEV072F52
K19Y04S C2020 10 14.59042505 49 25.510-04 58 26.95 22.77GVEV072F52
K19Y04S KC2020 10 18.56120805 46 20.736-05 25 44.95 22.52GVEV072F52
K19Y04S KC2020 11 11.45174 05 09 09.34 -07 04 08.0 21.9 RoEV072291
K19Y04S KC2020 11 11.46190 05 09 07.97 -07 04 08.1 21.9 RoEV072291
K19Y04S KC2020 11 11.47205 05 09 06.64 -07 04 08.4 21.7 RoEV072291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, K. Chambers, T. Dukes, T.
Lowe, A. Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
131207 F51 23.6+ 6.9+ 201111 291 1.0+ 1.9+ MPO545157 -0.00 days
Orbital elements:
2019 YS4 Earth MOID = 0.3107 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 139.11369 (2000.0) P Q
n 0.68254619 Peri. 160.32651 -0.10104467 +0.92888247
a 1.2775601 Node 102.56640 -0.95468291 +0.01025161
e 0.5523072 Incl. 21.41190 -0.27994734 -0.37023271
P 1.44 H 19.9 G 0.15 U 4
Residuals in seconds of arc
191227 F51 0.0 0.1+ 200104 G96 0.1- 0.1+ 200131 F52 0.0 0.2+
191230 F51 0.0 0.0 200106 I52 0.5+ 0.3- 200131 F52 0.1- 0.2+
191230 F51 0.1+ 0.0 200106 I52 0.1- 0.4+ 200201 F51 0.2- 0.1+
191230 F51 0.0 0.0 200106 I52 0.6- 0.3+ 200201 F51 0.1+ 0.0
191230 F51 0.1+ 0.1+ 200118 I52 0.5- 0.1+ 200201 F51 0.1+ 0.1-
191231 033 0.1+ 0.1+ 200118 I52 0.2+ 0.1+ 200214 I52 0.2+ 1.0-
191231 033 0.1- 0.3+ 200118 I52 0.2+ 0.1+ 200214 I52 0.3- 1.5-
191231 033 0.2- 0.2+ 200118 I52 0.4+ 0.1- 200214 I52 1.7- 0.2+
191231 L01 0.1- 0.0 200122 F52 0.0 0.2+ 200226 C51 0.3+ 1.5-
191231 L01 0.1+ 0.0 200122 F52 0.1+ 0.0 200226 C51 0.4+ 1.4+
191231 L01 0.6+ 0.1- 200122 F52 0.2+ 0.1+ 200226 C51 0.3+ 0.2-
191231 L01 0.0 0.1- 200122 F52 0.1+ 0.0 200226 C51 0.1+ 0.2+
200101 K88 0.1- 0.0 200126 F51 0.1+ 0.0 200226 C51 0.1+ 0.9+
200101 K88 0.1+ 0.4- 200126 F51 0.0 0.1+ 200227 I52 0.4+ 0.1+
200104 I52 0.9- 2.4- 200126 F51 0.0 0.1+ 200227 I52 0.0 0.5+
200104 I52 0.5- 0.2- 200126 F51 0.0 0.0 200227 I52 0.1- 0.1+
200104 I52 0.0 0.5+ 200127 F52 0.1+ 0.1+ 200227 I52 0.7- 0.5-
200104 G96 0.4- 0.5+ 200127 F52 0.1+ 0.1- 201111 291 0.2+ 0.0
200104 G96 1.1+ 0.2- 200131 F52 0.2+ 0.1+ 201111 291 0.2- 0.1+
200104 G96 0.3- 0.1+ 200131 F52 0.1+ 0.0 201111 291 0.0 0.1-
Ephemeris:
2019 YS4 a,e,i = 1.28, 0.55, 21 q = 0.5720
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 10 12 05 50 57.6 -04 39 55 1.0223 1.6425 108.8 35.1 22.5
...
2020 10 27 05 36 47.3 -06 16 41 0.9524 1.7208 124.3 28.5 22.2
...
2020 11 04 05 23 59.8 -06 50 45 0.9244 1.7582 133.1 24.3 22.1
...
2020 11 10 05 12 14.6 -07 03 06 0.9106 1.7841 139.6 21.1 22.0
2020 11 11 05 10 07.7 -07 03 50 0.9090 1.7883 140.6 20.6 22.0
2020 11 12 05 07 58.6 -07 04 10 0.9077 1.7924 141.6 20.0 22.0
...
2020 11 18 04 54 23.1 -06 56 57 0.9046 1.8162 147.2 17.2 21.9
...
2020 11 26 04 35 19.2 -06 21 33 0.9153 1.8453 151.9 14.6 21.9
...
2020 12 11 04 01 51.3 -04 02 28 0.9840 1.8921 147.9 16.0 22.1
A. U. Tomatic (C) Copyright 2020 MPC M.P.E.C. 2020-V72
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