MPEC 2021-D31 : 2021 DK
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M.P.E.C. 2021-D31 Issued 2021 February 18, 18:15 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
2021 DK
Observations:
K21D00K* C2021 02 16.54515313 03 50.44 -31 35 08.2 19.44cVED031T05
K21D00K C2021 02 16.54698113 03 49.22 -31 34 55.9 19.59cVED031T05
K21D00K C2021 02 16.55018313 03 47.30 -31 34 34.1 19.41cVED031T05
K21D00K C2021 02 16.55521313 03 44.23 -31 34 00.1 19.38cVED031T05
K21D00K KC2021 02 17.42320212 55 22.95 -29 54 59.0 19.43GVED031I52
K21D00K KC2021 02 17.42376612 55 22.71 -29 54 55.9 VED031I52
K21D00K KC2021 02 17.42432912 55 22.34 -29 54 51.0 19.38GVED031I52
K21D00K KC2021 02 17.42489112 55 21.97 -29 54 46.2 18.99GVED031I52
K21D00K C2021 02 17.62613312 53 30.26 -29 30 57.5 18.9 GVED031474
K21D00K C2021 02 17.62729212 53 29.61 -29 30 49.3 19.1 GVED031474
K21D00K C2021 02 17.62930012 53 28.47 -29 30 35.6 19.4 GVED031474
K21D00K C2021 02 17.63130712 53 27.31 -29 30 22.0 19.0 GVED031474
K21D00K KC2021 02 17.95219 12 50 34.08 -28 54 10.6 19.1 GVED031221
K21D00K KC2021 02 17.95891 12 50 30.34 -28 53 25.6 18.9 GVED031221
K21D00K KC2021 02 17.96554 12 50 26.68 -28 52 41.4 18.6 GVED031221
K21D00K KC2021 02 17.97222 12 50 22.95 -28 51 56.9 18.8 GVED031221
K21D00K KC2021 02 17.97886 12 50 19.24 -28 51 12.1 18.1 GVED031221
K21D00K KC2021 02 17.98549 12 50 15.55 -28 50 27.8 19.2 GVED031221
K21D00K KC2021 02 17.99212 12 50 11.86 -28 49 43.7 18.9 GVED031221
K21D00K KC2021 02 17.99877 12 50 08.11 -28 48 58.3 19.1 GVED031221
K21D00K KC2021 02 18.00553 12 50 04.35 -28 48 13.4 19.1 GVED031221
K21D00K KC2021 02 18.63671212 44 30.25 -27 36 56.5 19.5 GVED031474
K21D00K KC2021 02 18.63791112 44 29.60 -27 36 48.6 19.3 GVED031474
K21D00K KC2021 02 18.63911012 44 28.97 -27 36 40.3 19.6 GVED031474
K21D00K KC2021 02 18.64030812 44 28.33 -27 36 32.2 19.5 GVED031474
Observer details:
221 IAS Observatory, Hakos. Observer D. Husar. 0.5-m f/6.8 Corrected Dall-
Kirkham + CCD.
474 Mount John Observatory, Lake Tekapo. Observers A. C. Gilmore, P. M.
Kilmartin. Measurer P. M. Kilmartin. 1.0-m f/7.7 reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer D. Rankin. 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. 1.0-m reflector +
CCD.
T05 ATLAS-HKO, Haleakala. Observers L. Denneau, J. Tonry, A. Heinze, H.
Weiland. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, H.
Flewelling, A. Fitzsimmons, J. Robinson, N. Erasmus. 0.5-m reflector +
CCD.
Orbital elements:
2021 DK Earth MOID = 0.0744 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 358.13117 (2000.0) P Q
n 0.51882903 Peri. 230.67653 +0.61416179 -0.78917266
a 1.5338629 Node 181.44562 +0.75947709 +0.59222333
e 0.6276595 Incl. 7.82527 +0.21447575 +0.16272071
P 1.90 H 21.1 G 0.15 U 8
Residuals in seconds of arc
210216 T05 0.4+ 0.4+ 210217 474 0.1+ 0.2- 210217 221 0.3+ 0.3-
210216 T05 0.8- 0.2+ 210217 474 0.1+ 0.1- 210217 221 0.2- 0.5+
210216 T05 0.0 0.1+ 210217 474 0.1- 0.2- 210218 221 0.0 0.0
210216 T05 0.6+ 0.4- 210217 221 0.1- 0.3+ 210218 474 0.0 0.1-
210217 I52 0.6- 0.3- 210217 221 0.1- 0.3+ 210218 474 0.1- 0.2-
210217 I52 0.5+ 1.0- 210217 221 0.3+ 0.2+ 210218 474 0.0 0.0
210217 I52 0.0 0.0 210217 221 0.2+ 0.1- 210218 474 0.0 0.1+
210217 I52 0.6- 1.0+ 210217 221 0.1+ 0.3+
210217 474 0.1- 0.5- 210217 221 0.2+ 0.1+
Ephemeris:
2021 DK a,e,i = 1.53, 0.63, 8 q = 0.5711
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 19 19 35 40.3 -43 06 16 0.2480 0.7628 23.5 149.1 25.7
...
2021 02 03 16 22 16.5 -50 24 57 0.1686 0.9276 65.2 105.3 21.0
...
2021 02 11 14 10 07.8 -41 44 36 0.1601 1.0169 96.3 74.7 19.8
...
2021 02 17 12 59 23.8 -30 42 34 0.1713 1.0830 119.6 52.5 19.4
2021 02 18 12 50 06.2 -28 48 54 0.1747 1.0939 123.2 49.1 19.3
2021 02 19 12 41 25.4 -26 56 44 0.1784 1.1047 126.8 45.8 19.3
...
2021 02 25 12 00 03.9 -16 44 35 0.2087 1.1690 146.2 28.1 19.3
...
2021 03 05 11 24 58.6 -06 38 47 0.2667 1.2522 166.0 11.0 19.4
...
2021 03 20 10 52 33.0 +03 43 34 0.4162 1.3998 163.4 11.7 20.6
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-D31
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