MPEC 2019-O100 : 2018 DF4
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M.P.E.C. 2019-O100 Issued 2019 July 28, 23:45 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
2018 DF4
Revision to MPEC 2018-E16
Additional Observations:
K18D04F C2019 06 29.50790322 21 28.447+08 40 32.49 22.4 GVEO100F51
K18D04F C2019 06 29.53059922 21 27.368+08 40 45.62 22.3 GVEO100F51
K18D04F C2019 06 29.54196022 21 26.844+08 40 51.71 22.8 GVEO100F51
K18D04F C2019 07 28.53203 21 52 24.377+12 10 11.36 22.4 wUEO100F51
K18D04F C2019 07 28.54346 21 52 23.562+12 10 14.55 22.6 wUEO100F51
K18D04F C2019 07 28.55488 21 52 22.753+12 10 17.73 22.3 wUEO100F51
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe,
E. Magnier, A. Schultz, M. Willman. Measurers S. Chastel, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau,
J. Fairlamb, H. Flewelling, C.-C. Lin, E. Magnier.
1.8-m Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
190629 F51 0.9+ 10.3+ 190728 F51 1.5+ 10.7+ MPO450735 0.00 days
Orbital elements:
2018 DF4
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 MPC
M 0.20377 (2000.0) P Q
n 0.00098549 Peri. 278.57222 -0.12536676 +0.78741105
a 100.0081470 Node 319.45785 +0.02035389 -0.60617557
e 0.9840043 Incl. 68.20543 -0.99190166 -0.11195989
P 1000 H 16.2 G 0.15
Residuals in seconds of arc
180115 F51 0.0 0.0 180223 033 0.4- 0.4- 180301 807 0.0 0.2-
180115 F51 0.0 0.0 180223 033 0.2- 0.1- 180301 807 0.1+ 0.1-
180115 F51 0.0 0.1+ 180223 033 0.0 0.3- 180318 474 0.1+ 0.3-
180115 F51 0.1+ 0.0 180223 033 0.0 0.1- 180318 474 0.7+ 0.2-
180116 F51 0.1+ 0.2+ 180223 033 0.0 0.1- 180318 474 0.3+ 0.1+
180116 F51 0.0 0.0 180223 033 0.2- 0.0 180413 474 0.2+ 0.1+
180116 F51 0.1- 0.1+ 180224 807 0.3+ 0.2+ 180413 474 0.3- 0.1+
180127 G96 0.5- 0.1+ 180224 807 0.2+ 0.1+ 180413 474 0.1- 0.1+
180127 G96 0.2- 0.0 180224 807 0.4+ 0.1- 180413 474 0.1+ 0.4-
180127 G96 0.3- 0.9- 180224 033 0.7- 0.6+ 180521 568 0.0 0.1+
180127 G96 0.3+ 0.2+ 180224 033 0.0 0.4- 180521 568 0.0 0.1+
180223 G96 0.4+ 0.3- 180224 033 0.2+ 0.4- 180521 568 0.0 0.1+
180223 G96 0.2+ 0.1+ 180224 033 0.4+ 0.3- 180521 568 0.0 0.1+
180223 G96 0.2- 0.2+ 180224 033 0.1+ 0.0 190629 F51 0.0 0.0
180223 I52 0.2- 0.0 180225 H01 0.0 0.3+ 190629 F51 0.1- 0.3+
180223 I52 0.2+ 0.1+ 180225 H01 0.0 0.1- 190629 F51 0.1+ 0.1-
180223 I52 0.1- 0.5+ 180225 H01 0.1+ 0.1- 190728 F51 0.1- 0.0
180223 033 0.0 0.0 180225 H01 0.0 0.0 190728 F51 0.1- 0.1-
180223 033 0.0 0.1- 180225 033 0.3+ 0.1+ 190728 F51 0.0 0.1-
180223 033 0.3- 0.3+ 180225 033 0.6- 0.1-
180223 033 0.7- 0.2- 180301 807 0.2- 0.1-
Ephemeris:
2018 DF4 a,e,i = 100.01, 0.98, 68 q = 1.5997
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2019 06 28 22 22 36.9 +08 26 12 3.0909 3.6239 113.9 14.9 22.3
...
2019 07 13 22 09 26.3 +10 34 59 3.0463 3.7649 128.6 12.2 22.2
...
2019 07 21 22 00 59.3 +11 29 22 3.0425 3.8398 136.1 10.6 22.2
...
2019 07 27 21 54 11.4 +12 02 44 3.0505 3.8959 141.4 9.4 22.2
2019 07 28 21 53 01.7 +12 07 39 3.0528 3.9052 142.2 9.2 22.2
2019 07 29 21 51 51.6 +12 12 23 3.0554 3.9145 143.0 9.0 22.2
...
2019 08 04 21 44 45.3 +12 36 49 3.0773 3.9704 147.5 7.9 22.2
...
2019 08 12 21 35 13.7 +12 58 58 3.1237 4.0447 151.7 6.8 22.2
...
2019 08 27 21 18 19.3 +13 11 17 3.2649 4.1833 151.9 6.5 22.4
A. U. Tomatic (C) Copyright 2019 MPC M.P.E.C. 2019-O100
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