MPEC 2023-H39 : 2021 HU
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M.P.E.C. 2023-H39 Issued 2023 April 17, 14:12 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets, routine data on comets and natural satellites,
and occasional editorial announcements. 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 HU
Revision to MPEC 2021-H61
Additional Observations:
K21H00U C2019 04 07.30806511 38 00.799+27 04 54.42 23.44GVEH039F51
K21H00U C2019 04 07.32023411 37 57.855+27 05 08.61 23.66GVEH039F51
K21H00U C2019 04 07.33242011 37 54.962+27 05 22.41 23.40GVEH039F51
K21H00U C2019 04 21.28505810 28 32.911+30 13 31.18 22.80GVEH039F51
K21H00U C2021 04 15.36763412 58 13.735+27 50 31.76 20.79GVEH039F51
K21H00U C2021 04 15.37066912 58 13.159+27 50 42.54 20.84GVEH039F51
K21H00U C2021 04 19.35219712 43 01.903+33 02 31.18 21.05GVEH039F51
K21H00U C2023 03 28.43368314 25 00.526+10 29 40.66 22.93GVEH039F52
K21H00U C2023 03 28.44448314 25 02.026+10 29 44.91 22.40GVEH039F52
K21H00U C2023 03 28.45525814 25 03.503+10 29 49.54 22.25GVEH039F52
K21H00U C2023 03 28.53572014 25 14.602+10 30 22.76 22.66GVEH039F51
K21H00U 1C2023 04 15.43185516 14 15.479+11 53 11.00 21.77GVEH039G96
K21H00U 1C2023 04 15.43702116 14 19.792+11 53 09.13 21.07GVEH039G96
K21H00U 1C2023 04 15.44217116 14 24.126+11 53 07.26 21.38GVEH039G96
K21H00U 1C2023 04 15.44734316 14 28.442+11 53 04.88 21.47GVEH039G96
K21H00U 1C2023 04 15.47090316 14 48.310+11 52 55.20 21.63GVEH039G96
K21H00U 1C2023 04 15.47255416 14 49.690+11 52 54.80 21.30GVEH039G96
K21H00U 1C2023 04 15.47420416 14 51.080+11 52 53.90 20.30GVEH039G96
K21H00U 1C2023 04 15.47585416 14 52.480+11 52 53.40 21.37GVEH039G96
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, 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, I. Smith. Measurers S. Chastel, J. Fairlamb, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer J. K. Hogan. Measurers E. J. Christensen, D.
Fay, J. B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J.
K. Hogan, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
Seaman, A. Serrano, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K
CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
190407 F51 1.25+ 0.21+ 230415 G96 4.93+ 2.41+ MPO622783 +0.03 days
Orbital elements:
2021 HU Earth MOID = 0.0180 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 310.75579 (2000.0) P Q
n 0.49521738 Peri. 225.10438 -0.00421176 +0.99635674
a 1.5822392 Node 44.86380 -0.88008625 +0.03675013
e 0.4458573 Incl. 6.93533 -0.47479517 -0.07695886
P 1.99 H 25.29 G 0.15 U 0
Residuals in seconds of arc
190407 F51 0.6+ 0.0 210424 033 0.3+ 0.2+ 210426 033 0.1- 0.0
190407 F51 0.1+ 0.2+ 210424 033 0.3+ 0.2- 210426 033 0.0 0.2+
190407 F51 0.4+ 0.2+ 210425 033 0.5+ 0.0 210427 033 0.3+ 0.4+
190421 F51 0.0 0.5- 210425 033 0.0 0.2- 210427 033 0.1- 0.1+
210408 F51 0.0 0.1- 210425 033 0.0 0.3- 210427 033 0.2- 0.2+
210408 F51 0.4+ 0.1- 210425 033 0.1+ 0.1- 210427 033 0.1- 0.3+
210408 F51 0.5+ 0.0 210425 033 0.2+ 0.2- 210427 033 0.1+ 0.3+
210415 F51 0.6- 0.6+ 210425 033 0.1+ 0.0 210427 033 0.1- 0.1-
210415 F51 0.1+ 0.1+ 210425 033 0.1- 0.3+ 210427 033 0.0 0.2-
210417 G96 0.3- 0.3+ 210425 033 0.2+ 0.1+ 230328 F52 0.1+ 0.2+
210417 G96 0.3+ 0.1- 210425 033 0.3+ 0.1+ 230328 F52 0.1+ 0.1-
210417 G96 0.4- 0.2+ 210425 033 0.6+ 0.0 230328 F52 0.1- 0.0
210417 G96 0.1+ 0.2- 210425 033 0.4+ 0.1- 230328 F51 0.4+ 0.3+
210417 G96 0.2+ 0.2- 210425 033 0.4+ 0.0 230415 G96 0.2+ 0.1-
210417 G96 0.3+ 0.1+ 210425 033 0.5+ 0.3+ 230415 G96 0.1- 0.0
210417 G96 0.1- 0.2- 210426 033 0.1+ 0.0 230415 G96 0.1+ 0.2+
210418 G96 0.5+ 0.5- 210426 033 0.5+ 0.1- 230415 G96 0.3- 0.2-
210418 G96 0.2- 0.4+ 210426 033 0.2+ 0.1+ 230415 G96 0.1- 0.2-
210418 G96 0.5- 0.0 210426 033 0.1+ 0.0 230415 G96 0.3- 0.1+
210419 F51 0.2+ 0.1- 210426 033 0.3+ 0.0 230415 G96 0.4- 0.1-
210424 033 0.2+ 0.3- 210426 033 0.1+ 0.2- 230415 G96 0.3- 0.1+
210424 033 0.7+ 0.4- 210426 033 0.3+ 0.2-
210424 033 0.1+ 0.1+ 210426 033 0.0 0.2+
Ephemeris:
2021 HU a,e,i = 1.58, 0.45, 7 q = 0.8768
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 03 18 14 03 25.2 +09 23 44 0.2878 1.2428 145.4 27.0 24.3
...
2023 04 02 14 38 29.7 +11 00 33 0.1653 1.1419 147.3 28.2 22.9
...
2023 04 10 15 18 03.9 +11 49 17 0.1081 1.0900 143.1 33.4 22.0
...
2023 04 16 16 22 57.0 +11 49 38 0.07091 1.0528 132.8 44.3 21.4
2023 04 17 16 40 08.9 +11 37 47 0.06560 1.0468 129.8 47.5 21.3
2023 04 18 17 00 06.0 +11 18 32 0.06072 1.0408 126.1 51.2 21.2
...
2023 04 24 20 01 25.3 +04 43 53 0.04670 1.0063 89.6 87.7 21.7
...
2023 05 02 23 10 53.0 -05 08 58 0.07707 0.9647 54.3 121.9 24.6
...
2023 05 17 00 45 35.0 -07 44 24 0.1777 0.9051 49.2 122.3 26.3
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-H39
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