MPEC 2021-H105 : 2021 HM2
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M.P.E.C. 2021-H105 Issued 2021 April 21, 05:32 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 HM2
Observations:
K21H02M*KC2021 04 19.18129 13 23 03.43 -35 22 39.9 18.8 GVEH105W94
K21H02M KC2021 04 19.18679 13 23 00.63 -35 22 37.7 18.8 GVEH105W94
K21H02M KC2021 04 19.19226 13 22 57.79 -35 22 34.4 18.5 GVEH105W94
K21H02M KC2021 04 19.21627 13 22 45.42 -35 22 19.1 18.5 GVEH105W95
K21H02M KC2021 04 19.22154 13 22 42.69 -35 22 15.6 18.9 GVEH105W95
K21H02M KC2021 04 19.22680 13 22 39.96 -35 22 12.0 19.0 GVEH105W95
K21H02M KC2021 04 19.38629813 21 34.67 -35 19 43.4 19.4 GVEH105474
K21H02M KC2021 04 19.38843213 21 33.59 -35 19 42.6 19.2 GVEH105474
K21H02M KC2021 04 19.39056613 21 32.49 -35 19 41.9 19.2 GVEH105474
K21H02M KC2021 04 20.07450813 15 30.19 -35 12 45.7 18.3 GXEH105Y00
K21H02M KC2021 04 20.07506413 15 29.84 -35 12 45.8 18.9 GXEH105Y00
K21H02M KC2021 04 20.07799513 15 28.00 -35 12 43.5 18.0 GXEH105Y00
K21H02M KC2021 04 20.19621 13 14 14.39 -35 10 52.0 VEH105W95
K21H02M KC2021 04 20.20152 13 14 10.85 -35 10 46.4 18.6 GVEH105W95
K21H02M KC2021 04 20.20680 13 14 07.31 -35 10 40.9 18.7 GVEH105W95
K21H02M KC2021 04 21.00650 13 05 13.65 -34 54 13.5 19.0 VqEH105X31
K21H02M KC2021 04 21.01392 13 05 07.49 -34 54 05.2 19.2 VqEH105X31
K21H02M KC2021 04 21.02130 13 05 01.29 -34 53 56.7 19.2 VqEH105X31
Observer details:
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.
W94 MAP, San Pedro de Atacama. Observers A. Maury, G. Attard. Measurers A.
Maury, G. Attard, D. Parrott. 0.28-m f/2.2 Schmidt + CCD.
W95 Observatorio Panameno, San Pedro de Atacama. Observers A. Maury, G.
Attard, J. Fabrega. Measurers A. Maury, G. Attard, D. Parrott. 0.40-m
f/3.8 reflector + CCD.
X31 Galileo Galilei Observatory, Oro Verde. Observer C. Fornari. 0.40-m f/8
Ritchey-Chretien + CCD.
Y00 SONEAR Observatory, Oliveira. Observers C. Jacques, E. Pimentel, J.
Barros. Measurer C. Jacques. 0.28-m f/2.2 astrograph + CCD.
Orbital elements:
2021 HM2 Earth MOID = 0.0045 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Bell
M 203.56356 (2000.0) P Q
n 0.81613891 Peri. 103.65335 +0.75740590 +0.64208064
a 1.1340355 Node 216.60937 -0.64909865 +0.72073064
e 0.4686211 Incl. 11.47230 -0.07076193 +0.26130405
P 1.21 H 23.93 G 0.15 U 8
Residuals in seconds of arc
210419 W94 0.1+ 0.1+ 210419 474 0.1- 0.0 210420 W95 0.4- 0.0
210419 W94 0.4+ 0.8- 210419 474 0.0 0.1+ 210420 W95 0.1- 0.0
210419 W94 0.1+ 0.5- 210419 474 0.0 0.0 210420 W95 0.1- 0.0
210419 W95 0.2+ 0.1+ 210420 Y00 0.4+ 0.7+ 210421 X31 0.2+ 0.2-
210419 W95 0.1+ 0.1+ 210420 Y00 0.5+ 0.2+ 210421 X31 0.2+ 0.0
210419 W95 0.1- 0.1+ 210420 Y00 1.3+ 0.2+ 210421 X31 0.4- 0.1+
Ephemeris:
2021 HM2 a,e,i = 1.13, 0.47, 11 q = 0.6026
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 22 14 00 00.3 -32 56 21 0.3418 1.2703 137.8 31.8 23.5
...
2021 04 06 13 57 45.7 -34 54 18 0.1893 1.1661 148.4 26.7 21.9
...
2021 04 14 13 46 01.5 -35 30 27 0.1135 1.1057 153.5 23.9 20.5
...
2021 04 20 13 16 11.4 -35 13 12 0.05899 1.0583 154.9 23.7 19.0
2021 04 21 13 05 10.6 -34 54 39 0.05016 1.0503 154.3 24.6 18.7
2021 04 22 12 49 43.4 -34 20 51 0.04145 1.0422 152.8 26.2 18.3
...
2021 04 28 05 23 56.6 +25 43 07 0.01962 0.9928 44.3 134.9 21.6
...
2021 05 06 02 57 57.5 +35 10 25 0.08873 0.9252 18.8 159.5 29.3
...
2021 05 21 02 36 23.0 +34 10 12 0.2358 0.7976 21.6 152.1 29.2
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H105
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