MPEC 2021-H102 : 2021 HG2
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M.P.E.C. 2021-H102 Issued 2021 April 20, 15:07 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 HG2
Observations:
K21H02G C2021 04 18.24652309 18 13.335-05 05 36.63 20.06GVEH102F51
K21H02G C2021 04 18.24927109 18 15.749-05 04 59.59 18.96GVEH102F51
K21H02G C2021 04 19.26593809 36 49.660-00 51 37.47 VEH102F52
K21H02G* C2021 04 19.27587809 37 00.533-00 48 52.10 19.15wUEH102F52
K21H02G C2021 04 19.28614709 37 11.871-00 45 59.84 19.24wUEH102F52
K21H02G KC2021 04 19.88108509 50 09.37 +02 08 22.8 19.0 GVEH102J95
K21H02G KC2021 04 19.90741609 50 44.01 +02 16 42.6 18.6 GVEH102J95
K21H02G KC2021 04 19.91506909 50 54.12 +02 19 07.8 19.0 GVEH102J95
K21H02G KC2021 04 19.95836109 51 51.91 +02 32 56.0 VEH102Z80
K21H02G KC2021 04 19.97490209 52 14.36 +02 38 12.5 VEH102Z80
K21H02G KC2021 04 20.04639 09 54 10.00 +03 02 41.3 19.1 GXEH102W34
K21H02G KC2021 04 20.05497 09 54 21.39 +03 05 29.3 19.2 GXEH102W34
K21H02G KC2021 04 20.06339 09 54 32.62 +03 08 14.3 19.0 GXEH102W34
K21H02G mC2021 04 20.13687209 56 20.99 +03 32 44.1 18.90GVEH102I52
K21H02G mC2021 04 20.13706409 56 21.25 +03 32 47.5 18.34GVEH102I52
K21H02G mC2021 04 20.13725709 56 21.51 +03 32 51.1 19.39GVEH102I52
K21H02G mC2021 04 20.13744609 56 21.78 +03 32 54.9 18.46GVEH102I52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, 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, 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.
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.
J95 Great Shefford. Observer P. Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain
+ CCD.
W34 Squirrel Valley Observatory, Columbus. Observer R. L. Flynn. 0.36-m
Schmidt-Cassegrain + CCD.
Z80 Northolt Branch Observatory. Observer G. Wells. 0.25-m f/8.0 Ritchey-
Chretien + CCD.
Orbital elements:
2021 HG2 Earth MOID = 0.0119 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 303.45677 (2000.0) P Q
n 0.46482866 Peri. 355.99164 -0.89875620 +0.42950557
a 1.6504693 Node 209.94162 -0.39720134 -0.88268518
e 0.3838386 Incl. 10.16707 -0.18565665 -0.19076646
P 2.12 H 24.95 G 0.15 U 7
Residuals in seconds of arc
210418 F51 0.2- 0.1- 210419 J95 0.1+ 0.3+ 210420 W34 0.0 0.1-
210418 F51 0.2+ 0.2+ 210419 J95 0.3- 0.2- 210420 I52 0.0 0.4+
210419 F52 0.0 0.1- 210419 Z80 0.2- 1.0+ 210420 I52 0.0 0.0
210419 F52 (0.5- 0.6-) 210419 Z80 0.9- 0.3- 210420 I52 0.0 0.2-
210419 F52 0.1+ 0.0 210420 W34 0.3+ 0.6+ 210420 I52 0.1+ 0.2-
210419 J95 0.1+ 0.2- 210420 W34 0.0 0.3+
Ephemeris:
2021 HG2 a,e,i = 1.65, 0.38, 10 q = 1.0170
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 21 07 39 02.7 -26 59 37 0.1430 1.0574 111.7 61.1 23.0
...
2021 04 05 07 53 13.5 -23 10 42 0.08286 1.0256 105.5 70.0 22.1
...
2021 04 13 08 23 52.3 -16 54 08 0.05024 1.0181 106.5 70.7 21.0
...
2021 04 19 09 31 34.4 -02 01 38 0.02831 1.0170 115.9 62.6 19.5
2021 04 20 09 53 00.1 +02 50 25 0.02546 1.0172 119.1 59.6 19.2
2021 04 21 10 19 39.4 +08 45 46 0.02312 1.0175 122.7 56.2 18.8
...
2021 04 27 14 39 38.7 +40 44 08 0.02600 1.0217 125.3 53.5 19.0
...
2021 05 05 17 17 39.4 +38 29 27 0.05527 1.0332 115.1 62.2 20.9
...
2021 05 20 18 06 35.9 +32 54 03 0.1180 1.0715 117.5 56.9 22.5
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H102
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