MPEC 2021-H54 : 2021 HO
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M.P.E.C. 2021-H54 Issued 2021 April 18, 18:28 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 HO
Observations:
K21H00O*KC2021 04 16.06655 12 08 29.49 -46 47 16.7 19.0 GVEH054W94
K21H00O KC2021 04 16.07214 12 08 23.91 -46 47 41.6 18.7 GVEH054W94
K21H00O KC2021 04 16.07771 12 08 18.35 -46 48 06.1 18.6 GVEH054W94
K21H00O KC2021 04 16.10942 12 07 46.80 -46 50 25.4 19.4 GVEH054W95
K21H00O KC2021 04 16.11472 12 07 41.48 -46 50 48.3 19.4 GVEH054W95
K21H00O KC2021 04 16.11998 12 07 36.23 -46 51 11.1 19.5 GVEH054W95
K21H00O KC2021 04 16.38206812 03 14.15 -47 09 57.0 20.3 GVEH054474
K21H00O KC2021 04 16.38297612 03 13.26 -47 10 01.3 19.9 GVEH054474
K21H00O KC2021 04 16.38479312 03 11.41 -47 10 09.3 20.0 GVEH054474
K21H00O KC2021 04 16.38570212 03 10.40 -47 10 13.0 20.0 GVEH054474
K21H00O KC2021 04 17.21594 11 48 04.33 -48 08 59.3 19.9 GVEH054W95
K21H00O KC2021 04 17.22123 11 47 58.21 -48 09 20.1 19.6 GVEH054W95
K21H00O KC2021 04 17.22654 11 47 51.90 -48 09 41.9 VEH054W95
K21H00O KC2021 04 17.33734811 45 46.99 -48 17 03.8 19.9 GVEH054474
K21H00O KC2021 04 17.33796511 45 46.26 -48 17 06.2 19.8 GVEH054474
K21H00O KC2021 04 17.34053411 45 43.19 -48 17 16.7 19.7 GVEH054474
K21H00O KC2021 04 17.34115311 45 42.51 -48 17 19.5 19.8 GVEH054474
K21H00O KC2021 04 17.49254 11 42 41.05 -48 27 42.7 19.0 VqEH054E23
K21H00O KC2021 04 17.50180 11 42 29.83 -48 28 19.4 19.6 VqEH054E23
K21H00O KC2021 04 17.51105 11 42 18.47 -48 28 58.6 qEH054E23
K21H00O KC2021 04 18.18849 11 28 01.33 -49 12 17.9 19.2 GVEH054W95
K21H00O KC2021 04 18.19378 11 27 54.25 -49 12 36.7 VEH054W95
K21H00O KC2021 04 18.19905 11 27 47.11 -49 12 54.7 19.1 GVEH054W95
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.
E23 Arcadia. Observer A. Hidas. 0.35-m f/1.9 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.
Orbital elements:
2021 HO Earth MOID = 0.1547 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 318.00431 (2000.0) P Q
n 0.24504683 Peri. 346.73974 +0.91511726 +0.40108954
a 2.5291232 Node 349.33263 -0.34670881 +0.73082422
e 0.8919722 Incl. 12.82224 -0.20579944 +0.55228900
P 4.02 H 21.10 G 0.15 U 9
Residuals in seconds of arc
210416 W94 0.4- 0.2- 210416 474 0.4+ 0.2- 210417 474 0.4+ 0.0
210416 W94 0.4- 0.3- 210416 474 0.3- 0.1+ 210417 E23 0.5- 0.3-
210416 W94 0.5- 0.1- 210417 W95 0.5- 0.1- 210417 E23 0.4+ 0.1+
210416 W95 1.3+ 0.2+ 210417 W95 0.3+ 0.4+ 210417 E23 (0.0 2.2-)
210416 W95 1.3+ 0.6+ 210417 W95 0.4- 0.2- 210418 W95 0.1- 0.4-
210416 W95 1.7+ 0.8+ 210417 474 0.0 0.1- 210418 W95 0.2+ 0.4-
210416 474 0.5- 0.1+ 210417 474 0.0 0.1+ 210418 W95 0.4- 0.2+
210416 474 0.0 0.2- 210417 474 0.2- 0.3+
Ephemeris:
2021 HO a,e,i = 2.53, 0.89, 13 q = 0.2732
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 19 14 12 34.1 -26 47 15 0.7435 1.6195 136.8 24.9 22.7
...
2021 04 03 13 48 22.5 -33 56 54 0.4514 1.4034 148.1 22.1 21.2
...
2021 04 11 13 07 11.4 -40 49 22 0.3162 1.2796 147.3 25.0 20.3
...
2021 04 17 11 52 12.8 -47 53 49 0.2322 1.1823 136.2 36.0 19.8
2021 04 18 11 32 10.6 -49 00 23 0.2206 1.1657 133.0 39.1 19.7
2021 04 19 11 09 10.6 -49 57 24 0.2100 1.1490 129.3 42.5 19.7
...
2021 04 25 08 04 33.6 -46 36 23 0.1731 1.0459 98.6 72.0 19.9
...
2021 05 03 05 22 45.5 -21 21 54 0.2130 0.9007 54.3 114.6 22.0
...
2021 05 18 03 56 19.5 +03 45 37 0.4405 0.6015 16.3 151.8 27.0
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H54
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