MPEC 2021-H81 : 2021 HQ1
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M.P.E.C. 2021-H81 Issued 2021 April 19, 16:36 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 HQ1
Observations:
K21H01Q* C2021 04 17.30878213 10 35.274+13 41 40.89 20.90wUEH081F51
K21H01Q C2021 04 17.32125913 10 33.128+13 40 09.22 20.99wUEH081F51
K21H01Q C2021 04 17.33374213 10 30.972+13 38 38.03 21.50wUEH081F51
K21H01Q ^C2021 04 18.25289113 08 43.367+11 40 29.27 20.98GVEH081568
K21H01Q ^C2021 04 18.25387413 08 43.195+11 40 21.88 20.93GVEH081568
K21H01Q ^C2021 04 18.25485613 08 43.050+11 40 14.08 20.94GVEH081568
K21H01Q C2021 04 18.50595313 07 57.905+11 06 50.97 20.55GVEH081F51
K21H01Q C2021 04 18.50677413 07 57.760+11 06 44.37 20.62GVEH081F51
K21H01Q C2021 04 18.51748613 07 55.901+11 05 17.10 21.21GVEH081F51
K21H01Q C2021 04 18.52980913 07 53.749+11 03 35.20 21.35GVEH081F51
K21H01Q C2021 04 18.54052313 07 51.966+11 02 07.92 20.91GVEH081F51
K21H01Q C2021 04 19.44749913 06 03.782+08 56 42.67 21.13wUEH081F51
K21H01Q C2021 04 19.45925613 06 01.586+08 55 02.09 21.88wUEH081F51
K21H01Q C2021 04 19.48263713 05 57.226+08 51 40.77 20.88wUEH081F51
Observer details:
568 Mauna Kea. Observers R. Wainscoat, C. Cunningham, N. Manset. Measurers
R. Weryk, R. Wainscoat. 3.6-m Canada-France-Hawaii Telescope + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, T. Lowe, A. Schultz, M.
Willman, K. Chambers, I. Smith. Measurers K. Chambers, S. Chastel, T. de
Boer, L. Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E.
Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien +
CCD.
Orbital elements:
2021 HQ1 Earth MOID = 0.0428 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Pike
M 259.84536 (2000.0) P Q
n 0.71912397 Peri. 190.17338 -0.72106020 +0.68856242
a 1.2338628 Node 33.76310 -0.62554501 -0.59905706
e 0.1500041 Incl. 7.98076 -0.29793560 -0.40867156
P 1.37 H 26.32 G 0.15 U 7
Residuals in seconds of arc
210417 F51 0.1+ 0.0 210418 568 0.1+ 0.1- 210418 F51 0.1+ 0.0
210417 F51 0.1- 0.0 210418 F51 0.2+ 0.0 210419 F51 0.1- 0.2-
210417 F51 (0.2+ 0.7+) 210418 F51 0.2+ 0.1+ 210419 F51 0.2+ 0.2+
210418 568 0.2+ 0.2- 210418 F51 0.4+ 0.4+ 210419 F51 0.0 0.1+
210418 568 0.1- 0.1+ 210418 F51 0.2- 0.6-
Ephemeris:
2021 HQ1 a,e,i = 1.23, 0.15, 8 q = 1.0488
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 20 13 39 02.0 +36 53 48 0.1242 1.0893 136.5 39.0 23.5
...
2021 04 04 13 31 18.0 +31 10 28 0.08438 1.0679 142.1 35.1 22.5
...
2021 04 12 13 20 15.8 +22 52 25 0.06623 1.0594 148.5 29.6 21.8
...
2021 04 18 13 09 05.9 +12 14 20 0.05532 1.0546 155.5 23.3 21.3
2021 04 19 13 07 02.8 +10 00 09 0.05383 1.0540 156.7 22.2 21.2
2021 04 20 13 04 56.9 +07 37 37 0.05245 1.0533 157.8 21.2 21.1
...
2021 04 26 12 51 34.2 -09 14 54 0.04702 1.0504 159.5 19.6 20.8
...
2021 05 04 12 32 19.5 -34 04 04 0.04861 1.0486 145.3 33.2 21.2
...
2021 05 19 12 01 32.0 -63 27 31 0.07171 1.0522 122.8 54.0 22.7
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H81
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