MPEC 2021-H124 : 2021 HZ2
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M.P.E.C. 2021-H124 Issued 2021 April 23, 20:44 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 HZ2
Observations:
K21H02Z*HC2021 04 22.24730013 18 47.88 +45 47 39.9 20.10GVEH124G96
K21H02Z HC2021 04 22.25257413 19 03.10 +45 46 30.6 VEH124G96
K21H02Z HC2021 04 22.25792213 19 18.83 +45 45 18.6 20.31GVEH124G96
K21H02Z KC2021 04 22.27465213 20 06.80 +45 41 37.1 19.50GVEH124I52
K21H02Z KC2021 04 22.27617113 20 11.16 +45 41 16.5 19.30GVEH124I52
K21H02Z KC2021 04 22.27920413 20 19.85 +45 40 36.1 20.10GVEH124I52
K21H02Z KC2021 04 22.37654513 24 51.30 +45 18 21.4 18.96GVEH124I52
K21H02Z KC2021 04 22.37804813 24 55.39 +45 18 00.0 19.29GVEH124I52
K21H02Z KC2021 04 22.37955013 24 59.46 +45 17 39.4 19.04GVEH124I52
K21H02Z KC2021 04 22.38105213 25 03.61 +45 17 18.1 19.60GVEH124I52
K21H02Z KC2021 04 22.45575213 28 24.87 +44 59 42.5 19.59GVEH124I52
K21H02Z KC2021 04 22.45727013 28 28.91 +44 59 21.0 19.48GVEH124I52
K21H02Z KC2021 04 22.45878913 28 32.94 +44 58 59.0 19.15GVEH124I52
K21H02Z KC2021 04 22.82759 13 44 21.78 +43 39 38.1 19.5 GVEH124A17
K21H02Z KC2021 04 22.83584 13 44 39.60 +43 38 01.8 19.6 GVEH124A17
K21H02Z KC2021 04 22.84500 13 44 59.14 +43 36 13.3 19.7 GVEH124A17
K21H02Z KC2021 04 22.85471 13 45 19.61 +43 34 19.6 18.9 GVEH124A17
K21H02Z KC2021 04 22.87326713 46 00.59 +43 30 16.6 19.3 GVEH124J95
K21H02Z KC2021 04 22.87838413 46 11.30 +43 29 16.5 19.8 GVEH124J95
K21H02Z KC2021 04 22.88635713 46 27.85 +43 27 43.0 19.8 GVEH124J95
K21H02Z KC2021 04 22.89249513 46 40.61 +43 26 30.9 19.8 GVEH124J95
K21H02Z HC2021 04 22.90815 13 47 10.71 +43 24 04.3 VEH124204
K21H02Z HC2021 04 22.92139 13 47 37.43 +43 21 26.5 VEH124204
K21H02Z KC2021 04 22.93463 13 48 03.93 +43 18 48.5 19.6 GVEH124204
K21H02Z KC2021 04 22.93787013 48 12.35 +43 17 25.3 20.1 GVEH124Z99
K21H02Z KC2021 04 22.94233113 48 21.24 +43 16 32.3 20.3 GVEH124Z99
K21H02Z KC2021 04 22.94680013 48 30.19 +43 15 39.4 20.0 GVEH124Z99
K21H02Z KC2021 04 23.09598313 53 13.62 +42 46 02.9 19.2 GVEH124K38
K21H02Z KC2021 04 23.12334413 54 04.65 +42 40 26.4 19.6 GVEH124K38
K21H02Z KC2021 04 23.12638813 54 38.45 +42 40 46.4 19.6 VuEH124H21
K21H02Z KC2021 04 23.13094413 54 46.71 +42 39 55.6 19.8 VuEH124H21
K21H02Z KC2021 04 23.13463713 54 53.38 +42 39 14.5 19.9 VuEH124H21
K21H02Z KC2021 04 23.14487013 55 17.90 +42 37 10.0 20.1 GVEH124H01
K21H02Z KC2021 04 23.15214513 55 31.03 +42 35 51.4 20.2 GVEH124H01
K21H02Z KC2021 04 23.16001713 55 45.12 +42 34 26.4 20.4 GVEH124H01
K21H02Z KC2021 04 23.16691913 55 57.41 +42 33 11.8 20.1 GVEH124H01
K21H02Z KC2021 04 23.16855213 56 01.52 +42 32 54.5 VEH124I52
K21H02Z KC2021 04 23.16978613 56 03.80 +42 32 39.4 19.36GVEH124I52
K21H02Z KC2021 04 23.17102013 56 05.96 +42 32 26.6 19.16GVEH124I52
K21H02Z C2021 04 23.28833 13 59 27.39 +42 10 49.5 20.5 GVEH124654
K21H02Z C2021 04 23.29234 13 59 33.93 +42 10 05.5 20.5 GVEH124654
K21H02Z C2021 04 23.35912 14 01 21.14 +41 57 41.1 20.2 GVEH124654
K21H02Z C2021 04 23.36313 14 01 27.48 +41 56 56.0 20.2 GVEH124654
K21H02Z 1C2021 04 23.82833 14 13 33.51 +40 34 18.6 20.0 VVEH124033
K21H02Z 1C2021 04 23.82931 14 13 34.78 +40 34 09.8 20.0 VVEH124033
K21H02Z 1C2021 04 23.83029 14 13 36.08 +40 34 00.8 20.1 VVEH124033
K21H02Z 1C2021 04 23.83146 14 13 37.62 +40 33 50.0 20.4 VVEH124033
K21H02Z 1C2021 04 23.83252 14 13 39.01 +40 33 40.0 20.2 VVEH124033
K21H02Z KC2021 04 23.83428914 13 42.92 +40 33 47.2 19.8 GVEH124104
K21H02Z KC2021 04 23.84615014 13 58.32 +40 31 57.7 20.0 GVEH124104
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, U. Laux, F. Ludwig, B. Stecklum. Measurer B. Stecklum. 1.34-m
f/3 Schmidt + CCD.
104 San Marcello Pistoiese. Observers P. Bacci, M. Maestripieri. Measurers
P. Bacci, L. Tesi, G. Fagioli. 0.60-m reflector + CCD.
204 Schiaparelli Observatory. Observer L. Buzzi. 0.84-m f/3.5 reflector +
CCD.
654 Table Mountain Observatory, Wrightwood-PHMC. Observers P. Choi, N. Saini,
C. Zhai, R. Trahan, M. Shao.
A17 Guidestar Observatory, Weinheim. Observers M. Emmerich, S. Melchert.
0.36-m f/6.0 Schmidt-Cassegrain + CCD.
G96 Mt. Lemmon Survey. Observer G. J. Leonard. 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. 1.5-m reflector + 10K CCD.
H01 Magdalena Ridge Observatory, Socorro. Observers W. H. Ryan, E. V. Ryan.
Measurer W. H. Ryan. 2.4-m f/8.9 Ritchey-Chretien + CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes. 0.76-m f/3.0
astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observers D. Rankin, K. W.
Wierzchos. 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.
K38 M57 Observatory, Saltrio. Observer G. Baj. 0.3-m f/6.54 Ritchey-Chretien
+ CCD.
Z99 Clixby Observatory, Cleethorpes. Observer A. Mickleburgh. 0.36-m f/8
Schmidt-Cassegrain + CCD.
Orbital elements:
2021 HZ2 Earth MOID = 0.0044 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 317.66427 (2000.0) P Q
n 0.49838139 Peri. 311.96459 -0.92451017 -0.36381917
a 1.5755354 Node 207.28790 +0.37941463 -0.90690169
e 0.4290911 Incl. 14.35306 -0.03640708 -0.21252042
P 1.98 H 25.64 G 0.15 U 7
Residuals in seconds of arc
210422 G96 (1.2+ 0.6-) 210422 J95 0.2+ 0.1+ 210423 H01 0.2+ 0.0
210422 G96 0.1- 0.2- 210422 J95 0.2+ 0.1+ 210423 H01 0.1+ 0.2+
210422 G96 (2.2+ 1.4-) 210422 J95 0.5- 0.2+ 210423 I52 (0.1+ 1.2+)
210422 I52 0.0 0.1- 210422 J95 0.1- 0.4+ 210423 I52 (1.0+ 0.6-)
210422 I52 0.1+ 0.3- 210422 204 0.2- 0.2- 210423 I52 0.7+ 0.1-
210422 I52 0.2+ 0.1- 210422 204 0.3- 0.0 210423 654 0.2+ 0.2-
210422 I52 0.2+ 0.2+ 210422 204 0.1- 0.2+ 210423 654 0.0 0.0
210422 I52 0.2+ 0.2- 210422 Z99 0.1+ 0.0 210423 654 0.1+ 0.2-
210422 I52 0.1- 0.2+ 210422 Z99 0.6- 0.0 210423 654 0.1+ 0.2-
210422 I52 0.4+ 0.1- 210422 Z99 0.5- 0.2+ 210423 033 0.0 0.4-
210422 I52 0.3+ 0.0 210423 K38 0.2- 0.3+ 210423 033 0.2- 0.1-
210422 I52 0.2+ 0.1+ 210423 K38 (1.1+ 1.2+) 210423 033 0.1- 0.1+
210422 I52 0.0 0.3- 210423 H21 0.6- 0.3+ 210423 033 0.1+ 0.1+
210422 A17 0.3- 0.4- 210423 H21 0.4- 0.2- 210423 033 0.1+ 0.0
210422 A17 0.8+ 0.4+ 210423 H21 0.4- 0.4- 210423 104 0.7- 0.1+
210422 A17 0.9+ 0.3- 210423 H01 0.1+ 0.2- 210423 104 0.0 0.1+
210422 A17 0.1- 0.5+ 210423 H01 0.2+ 0.2-
Ephemeris:
2021 HZ2 a,e,i = 1.58, 0.43, 14 q = 0.8995
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 03 24 03 51 16.4 -19 59 29 0.1874 0.9108 57.7 112.2 26.1
...
2021 04 08 04 18 12.6 -16 30 37 0.08213 0.9539 52.9 123.2 25.2
...
2021 04 16 05 17 52.1 -00 14 45 0.02847 0.9879 56.1 122.6 22.9
...
2021 04 22 13 04 59.0 +46 41 56 0.02391 1.0173 120.0 58.8 19.7
2021 04 23 13 50 14.3 +43 06 06 0.02971 1.0225 124.4 54.2 20.0
2021 04 24 14 17 07.9 +40 08 23 0.03597 1.0277 127.0 51.4 20.4
...
2021 04 30 15 11 02.8 +31 38 32 0.07668 1.0606 132.6 44.4 21.9
...
2021 05 08 15 26 46.2 +27 34 07 0.1334 1.1076 134.9 40.2 23.1
...
2021 05 23 15 34 21.7 +22 54 43 0.2455 1.2016 136.2 35.7 24.5
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-H124
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