[Iaude] MPEC G174: 2020 HG9 [a=0.86,e=0.42,i=1.7,H=23.35]
mpec at cfa.harvard.edu
mpec at cfa.harvard.edu
Fri Apr 12 10:13:38 EDT 2024
M.P.E.C. 2024-G174 Issued 2024 April 12, 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2020 HG9
Revision to MPEC 2020-H241
Additional Observations:
K20H09G KC2024 04 10.42403415 32 38.216-13 30 06.77 21.73GVEG174V06
K20H09G KC2024 04 10.42631315 32 37.842-13 30 05.00 21.54GVEG174V06
K20H09G KC2024 04 10.42859215 32 37.471-13 30 03.10 21.83GVEG174V06
K20H09G KC2024 04 10.43087215 32 37.093-13 30 01.44 21.75GVEG174V06
K20H09G KC2024 04 11.41828 15 30 06.91 -13 17 21.8 21.5 RVEG174291
K20H09G KC2024 04 11.42275 15 30 06.14 -13 17 18.6 21.7 RVEG174291
K20H09G KC2024 04 12.43786 15 27 19.16 -13 03 24.3 VEG174691
K20H09G KC2024 04 12.45181 15 27 16.64 -13 03 12.9 VEG174691
K20H09G KC2024 04 12.46577 15 27 14.05 -13 03 00.6 VEG174691
Observer details:
291 LPL/Spacewatch II. Observer R. A. Mastaler. 1.8-m f/2.7 reflector + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch. Observer R. A. Mastaler.
0.9-m f/3 reflector + CCD.
V06 Catalina Sky Survey-Kuiper. Observer G. J. Leonard. Measurers T. Beuden,
V. F. Carvajal, 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, F. C. Shelly, K. W. Wierzchos. 1.55-m
reflector + 1K CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
240410 V06 77.8+ 24.2+ 240412 691 83.7+ 26.5+ MPO714601 +0.02 days
Orbital elements:
2020 HG9 Earth MOID = 0.0031 AU
Epoch 2024 Mar. 31.0 TT = JDT 2460400.5 Veres
M 196.51076 (2000.0) P Q
n 1.22683591 Peri. 308.97358 +0.97247909 -0.23138028
a 0.8641950 Node 64.42012 +0.22204219 +0.88482935
e 0.4186181 Incl. 1.73708 +0.07058104 +0.40440101
P 0.80 H 23.35 G 0.15 U 1
Residuals in seconds of arc
200427 G96 0.6- 0.0 200509 R57 0.3+ 0.1+ 200516 F52 0.0 0.1+
200427 G96 0.0 0.2+ 200509 R57 0.0 0.8+ 200516 I52 0.5+ 0.0
200428 F51 0.2- 0.1- 200510 T08 0.7- 0.0 200516 I52 0.3+ 0.0
200428 F51 0.1+ 0.0 200510 T08 0.3+ 0.3- 200516 I52 0.3+ 0.1+
200428 F51 0.1+ 0.0 200510 T08 0.3+ 0.9+ 200516 I52 0.0 0.1+
200429 I52 0.3+ 0.2- 200510 T08 0.3+ 0.6- 200516 F52 0.1- 0.1+
200429 I52 0.1+ 0.3- 200510 D29 0.1+ 0.2+ 200516 F52 0.0 0.0
200429 I52 0.0 0.1- 200510 D29 0.2+ 0.1+ 200516 F52 0.1+ 0.0
200429 I52 0.3- 0.5- 200510 D29 (1.2- 0.2-) 200516 033 0.1+ 0.4-
200429 F51 0.0 0.0 200510 D29 (0.7+ 0.9-) 200516 033 0.1- 0.3-
200429 F51 0.0 0.0 200510 A50 0.0 0.4- 200516 033 0.4- 0.1-
200429 F51 0.1+ 0.0 200510 A50 1.1- 0.1+ 200517 703 0.8- 0.1-
200429 474 0.1+ 0.3- 200510 A50 1.3- 0.0 200517 703 0.3- 0.4-
200429 474 0.2+ 0.1- 200510 A50 1.1+ 1.0+ 200517 703 1.0- 0.1+
200429 474 0.2- 0.2- 200510 A50 0.0 1.4+ 200517 703 0.3+ 0.1-
200430 L01 1.2- 0.6- 200511 W33 0.4- 0.1+ 200517 246 0.4+ 0.1-
200430 L01 0.1+ 0.2+ 200511 W33 0.2+ 0.5- 200517 246 0.0 0.3+
200430 L01 0.6- 0.1- 200511 Q78 0.4+ 0.3- 200517 246 0.2+ 0.2+
200430 I52 0.0 0.0 200511 Q78 0.3+ 0.5- 200517 246 0.4+ 0.2+
200430 I52 0.1- 0.2+ 200511 Q78 0.3- 0.1+ 200517 246 0.5+ 0.2+
200430 I52 0.3- 0.1+ 200511 D20 0.2+ 0.3+ 200517 246 0.1+ 0.4+
200430 I52 0.0 0.1+ 200511 D20 0.5- 0.1- 200517 246 0.3+ 0.2-
200430 F51 0.2- 0.0 200512 W46 0.1+ 0.1- 200517 246 0.0 0.1-
200430 F51 0.0 0.1- 200512 W46 0.4- 0.3+ 200518 I52 0.1+ 0.2-
200430 F51 0.0 0.0 200512 W46 0.1- 0.3+ 200518 I52 0.2+ 0.1-
200430 F51 0.1- 0.1- 200512 K87 0.1- 0.1- 200518 I52 0.2+ 0.1-
200501 F51 0.0 0.0 200512 K87 0.1- 0.0 200518 I52 0.1+ 0.0
200501 F51 0.1+ 0.0 200512 K87 0.2+ 0.1- 200518 246 0.2+ 1.4-
200501 F51 0.0 0.0 200513 F52 0.0 0.0 200518 246 1.4+ 1.5-
200502 G96 0.1+ 0.3+ 200513 F52 0.1+ 0.0 200518 246 0.4- 0.6-
200502 G96 0.3- 0.5+ 200513 F52 0.1+ 0.1- 200518 246 1.5+ 0.8-
200502 G96 0.1- 0.1+ 200513 T05 0.4+ 0.1+ 200518 246 0.2- 0.3-
200502 G96 0.1+ 0.1- 200513 T05 0.1+ 0.2- 200518 246 0.7+ 0.8-
200503 I52 0.2+ 0.3+ 200513 T05 0.0 0.1- 200518 246 0.7- 0.9-
200503 I52 0.5- 0.2+ 200513 T05 0.1- 0.1+ 200518 246 0.1+ 0.0
200504 H21 0.3- 0.1- 200514 I52 0.1- 0.1- 200519 I52 0.2- 0.2+
200504 H21 0.0 0.0 200514 I52 0.1- 0.2- 200519 I52 0.1- 0.1-
200504 H21 0.3- 0.1- 200514 I52 0.1- 0.2- 200519 I52 0.1+ 0.2-
200504 H21 0.2- 0.2- 200514 I52 0.0 0.3- 200519 I52 0.0 0.1+
200504 H21 0.1- 0.1- 200514 G96 0.1- 0.1- 200519 204 0.1- 0.2-
200504 H21 0.0 0.0 200514 U71 0.5+ 0.5- 200519 204 0.0 0.5-
200504 H21 0.2- 0.1- 200514 G96 0.3- 0.0 200520 T08 (2.3+ 0.6-)
200504 H21 0.1+ 0.1+ 200514 U71 0.0 0.2- 200520 T08 0.3- 0.4+
200504 H21 0.1- 0.2+ 200514 G96 0.4- 0.1- 200520 I52 0.2+ 0.1+
200509 734 0.7- 0.3- 200514 G96 (1.0- 0.1+) 200520 T08 (2.2+ 1.0-)
200509 734 0.2- 0.1+ 200514 703 0.1+ 0.5- 200520 I52 0.2- 0.4+
200509 734 0.8- 0.2+ 200514 703 0.0 0.1- 200520 I52 0.1- 0.1-
200509 734 0.1+ 0.3- 200514 703 0.6+ 0.1- 200520 I52 0.1- 0.2+
200509 734 0.2- 0.3- 200514 703 0.4+ 0.2+ 200520 T08 (1.4- 1.0+)
200509 H21 0.2- 0.0 200515 W33 0.5+ 0.7+ 200523 I52 0.2+ 0.1-
200509 H21 0.0 0.3- 200515 W33 0.4+ 0.2+ 200523 I52 0.1+ 0.3+
200509 H21 0.3- 0.0 200515 W33 0.3- 0.3- 200523 I52 0.5+ 0.3+
200509 H21 0.2- 0.1- 200515 T08 0.1- 0.1+ 200523 I52 0.4- 0.1+
200509 H21 0.1- 0.0 200515 T08 0.2- 0.1+ 240410 V06 0.2+ 0.1-
200509 H21 0.1+ 0.3- 200515 T08 0.2+ 0.1- 240410 V06 0.1+ 0.0
200509 H21 0.1- 0.1- 200515 T08 0.1+ 0.0 240410 V06 0.0 0.2+
200509 H21 0.2- 0.3- 200515 Z80 0.9+ 0.2- 240410 V06 0.2- 0.1+
200509 H21 0.3- 0.2- 200515 Z80 0.2- 0.7+ 240411 291 0.1- 0.2+
200509 H21 0.1+ 0.1- 200515 Z80 0.5- 0.4- 240411 291 0.1- 0.2-
200509 H21 0.2- 0.0 200516 V01 0.2- 0.0 240412 691 0.4- 0.2+
200509 H21 0.1+ 0.3- 200516 V01 0.1- 0.4+ 240412 691 0.4+ 0.5-
200509 R57 0.1+ 0.2+ 200516 V01 0.8- 0.3+ 240412 691 0.1+ 0.3-
200509 R57 0.1+ 0.2+ 200516 V01 0.5- 1.1-
Ephemeris:
2020 HG9 a,e,i = 0.86, 0.42, 2 q = 0.5024
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2024 03 13 15 50 24.2 -15 56 42 0.4214 1.2251 113.6 48.0 23.7
...
2024 03 28 15 51 20.0 -15 18 46 0.3185 1.2215 128.3 39.9 22.9
...
2024 04 05 15 43 18.1 -14 26 10 0.2662 1.2119 138.2 33.4 22.3
...
2024 04 11 15 31 12.4 -13 22 23 0.2295 1.2013 147.1 27.0 21.8
2024 04 12 15 28 33.3 -13 09 04 0.2237 1.1992 148.7 25.7 21.7
2024 04 13 15 25 42.2 -12 54 51 0.2180 1.1970 150.4 24.5 21.6
...
2024 04 19 15 03 50.6 -11 07 25 0.1862 1.1824 161.4 15.7 20.9
...
2024 04 27 14 19 51.6 -07 27 21 0.1525 1.1581 173.6 5.5 20.0
...
2024 05 12 12 17 14.0 +03 09 33 0.1272 1.0980 131.1 43.9 20.8
A. U. Tomatic (C) Copyright 2024 MPC M.P.E.C. 2024-G174
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