[Iaude] MPEC S67: 2018 PK21 [a=0.99,e=0.08,i=1.2,H=25.9]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Mon Sep 23 11:57:34 EDT 2019
M.P.E.C. 2019-S67 Issued 2019 September 23, 15:55 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2018 PK21
Revision to MPEC 2018-P104
Additional Observations:
K18P21K KC2019 09 19.42478 01 38 20.41 +24 38 08.0 21.7 RoES067691
K18P21K KC2019 09 19.44260 01 38 17.17 +24 38 16.2 22.2 RoES067691
K18P21K KC2019 09 19.46042 01 38 13.92 +24 38 24.7 22.0 RoES067691
K18P21K KC2019 09 22.37978 01 30 45.22 +25 03 25.0 21.5 RoES067691
K18P21K KC2019 09 22.38475 01 30 44.08 +25 03 27.5 20.4 RoES067691
K18P21K KC2019 09 22.38970 01 30 42.99 +25 03 29.8 21.8 RoES067691
Observer details:
691 Steward Observatory, Kitt Peak-Spacewatch. Observers T. H. Bressi, M. T.
Read. 0.9-m f/3 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
190919 691 5.8- 1.5- 190922 691 5.9- 1.6- MPO473497 +0.00 days
Orbital elements:
2018 PK21 Earth MOID = 0.0071 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 Veres
M 44.04248 (2000.0) P Q
n 1.00361244 Peri. 224.30428 -0.98386298 -0.17811324
a 0.9880040 Node 305.42844 +0.16941277 -0.89676535
e 0.0805474 Incl. 1.19608 +0.05755821 -0.40507726
P 0.98 H 25.9 G 0.15 U 4
Residuals in seconds of arc
180811 F51 0.0 0.0 180817 679 0.0 0.1+ 180908 691 0.4+ 0.3+
180811 F51 0.1+ 0.0 180817 679 0.0 0.1+ 180913 H21 0.1+ 0.0
180811 F51 0.1+ 0.0 180819 H21 0.1+ 0.1- 180913 H21 0.1- 0.0
180811 F51 0.1+ 0.1+ 180819 H21 0.2+ 0.2+ 180913 291 0.2- 0.1+
180811 F51 0.1+ 0.0 180819 H21 0.1- 0.2+ 180913 291 0.3+ 0.3+
180811 F51 0.0 0.1+ 180822 291 0.1- 0.1- 180914 H21 0.3+ 0.7+
180811 F51 0.1+ 0.0 180822 291 0.2- 0.0 180914 H21 0.1+ 0.4+
180811 104 0.8- 0.6- 180822 291 0.2- 0.2+ 180914 H21 0.3+ 0.1-
180811 104 0.4- 1.2- 180823 H21 0.2+ 0.1- 180915 H21 0.1- 0.2+
180811 104 0.2+ 0.7- 180823 H21 0.4- 0.5+ 180915 H21 0.2- 0.2+
180812 L01 0.6- 0.0 180829 695 0.1+ 0.1- 180916 H21 0.1+ 0.4-
180812 L01 0.3+ 0.7+ 180829 695 0.1+ 0.0 180916 H21 0.3+ 0.3-
180812 L01 0.2- 0.1+ 180831 691 0.3- 0.3- 180916 291 0.7- 0.8+
180812 H21 0.2+ 0.3- 180831 691 0.3- 0.0 180916 291 0.6+ 0.2-
180812 H21 0.5+ 0.1+ 180904 I52 0.3+ 0.1+ 180917 291 0.0 0.4-
180812 H21 0.2+ 0.3- 180904 I52 0.0 0.4- 180917 291 0.3- 0.3+
180812 734 0.0 0.2+ 180904 I52 0.0 0.1+ 180917 291 0.0 0.3-
180812 734 0.5+ 0.1+ 180904 I52 0.1- 0.0 181007 807 0.2- 0.2-
180812 734 0.6- 0.2+ 180905 291 0.0 0.0 181007 807 0.2- 0.3-
180814 807 0.1- 0.0 180905 291 0.2- 0.0 181007 807 0.3- 0.2-
180814 807 0.1- 0.2- 180905 291 0.3+ 0.0 190919 691 0.6- 0.2+
180814 807 0.3- 0.1- 180907 691 0.0 0.2- 190919 691 0.0 0.5-
180817 679 0.2- 0.1+ 180907 691 0.3- 0.0 190919 691 0.1+ 0.4-
180817 679 0.0 0.0 180907 691 0.2+ 0.1- 190922 691 0.9+ 0.3-
180817 679 0.1- 0.0 180908 691 0.2- 0.2+ 190922 691 0.0 0.1+
180817 679 0.1- 0.0 180908 691 0.3- 0.1- 190922 691 0.4- 0.3+
Ephemeris:
2018 PK21 a,e,i = 0.99, 0.08, 1 q = 0.9084
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2019 08 24 01 58 27.7 +18 17 51 0.1101 1.0645 116.2 58.5 23.3
...
2019 09 08 01 56 15.0 +22 15 15 0.09025 1.0671 129.3 47.0 22.6
...
2019 09 16 01 45 33.6 +24 01 35 0.08038 1.0666 137.9 39.2 22.1
...
2019 09 22 01 31 48.9 +25 00 48 0.07377 1.0653 145.2 32.6 21.8
2019 09 23 01 28 59.6 +25 08 01 0.07276 1.0651 146.4 31.4 21.7
2019 09 24 01 26 01.0 +25 14 18 0.07178 1.0647 147.7 30.3 21.6
...
2019 09 30 01 05 04.8 +25 28 02 0.06667 1.0625 154.9 23.6 21.3
...
2019 10 08 00 31 18.3 +24 28 54 0.06232 1.0583 160.5 18.4 20.9
...
2019 10 23 23 30 28.8 +19 06 03 0.06210 1.0472 146.0 32.1 21.3
A. U. Tomatic (C) Copyright 2019 MPC M.P.E.C. 2019-S67
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