MPEC 2023-Q116 : 2021 GU7
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M.P.E.C. 2023-Q116 Issued 2023 August 24, 14:05 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@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2021 GU7
Revision to MPEC 2021-G170
Additional Observations:
K21G07U C2023 06 20.55832223 00 06.061+05 19 34.24 22.62GVEQ116F52
K21G07U C2023 06 20.58265023 00 09.484+05 20 17.52 22.21GVEQ116F52
K21G07U C2023 06 29.58132023 21 05.584+09 37 33.17 22.25GVEQ116F51
K21G07U C2023 06 29.59120523 21 06.849+09 37 49.81 23.75GVEQ116F51
K21G07U C2023 06 29.60114623 21 08.063+09 38 06.19 22.27GVEQ116F51
K21G07U 0C2023 08 09.50775500 23 11.962+24 19 49.05 21.85GVEQ116T12
K21G07U 0C2023 08 09.51992000 23 12.313+24 19 59.01 22.08GVEQ116T12
K21G07U 0C2023 08 11.58539900 24 22.586+24 46 11.07 21.79GVEQ116T12
K21G07U 0C2023 08 11.58843600 24 22.652+24 46 13.27 21.82GVEQ116T12
K21G07U C2023 08 22.42295200 26 37.972+26 22 20.91 21.29GVEQ116F52
K21G07U C2023 08 22.43468400 26 37.797+26 22 25.26 21.41GVEQ116F52
K21G07U C2023 08 22.47742400 26 37.164+26 22 40.04 21.31GVEQ116F52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, P.
Minguez, A. Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, 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, P. Minguez, A. Schultz, I. Smith. Measurers S. Chastel, J.
Fairlamb, M. Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m
Ritchey-Chretien + CCD.
T12 University of Hawaii 88-inch telescope, Maunakea. Observer D. Hung.
Measurer D. J. Tholen. 2.24-m f/10.1 reflector + 2112 x 2112 pixels
STA1600 10k CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
230620 F52 54.1+ 14.2+ 230822 F52 94.2+ 11.6+ MPO750185 +0.01 days
Orbital elements:
2021 GU7 Earth MOID = 0.1977 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 47.81895 (2000.0) P Q
n 0.53235377 Peri. 39.11870 +0.29930230 +0.94857421
a 1.5077725 Node 248.51410 -0.90087286 +0.24533741
e 0.2024401 Incl. 6.36006 -0.31439819 +0.20004131
P 1.85 H 22.08 G 0.15 U 3
Residuals in seconds of arc
210409 F51 0.1+ 0.1+ 210412 807 0.1+ 0.1- 230620 F52 0.3- 0.4-
210409 F51 0.0 0.2- 210412 807 0.0 0.1- 230620 F52 0.0 0.0
210409 F51 0.1+ 0.2- 210417 F51 0.0 0.0 230629 F51 0.2- 0.1-
210409 F51 0.0 0.1+ 210417 F51 0.2+ 0.1+ 230629 F51 0.1+ 0.0
210410 807 0.2+ 0.2+ 210417 F51 0.2+ 0.2+ 230629 F51 0.4- 0.3-
210410 807 0.1+ 0.1+ 210417 F51 0.2+ 0.0 230809 T12 0.0 0.0
210410 807 0.2- 0.2- 210508 V06 0.1+ 1.3- 230809 T12 0.0 0.1+
210410 568 0.1- 0.0 210508 V06 0.7- 0.2- 230811 T12 0.0 0.0
210410 568 0.0 0.0 210508 V06 0.2- 0.1- 230811 T12 0.0 0.1+
210410 568 0.0 0.0 210529 807 0.5+ 0.7- 230822 F52 0.2+ 0.1+
210410 568 0.1- 0.0 210529 807 0.1+ 0.3- 230822 F52 0.0 0.3+
210412 807 0.2+ 0.0 210529 807 0.2+ 0.6- 230822 F52 0.2+ 0.1+
Ephemeris:
2021 GU7 a,e,i = 1.51, 0.20, 6 q = 1.2025
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 07 25 00 07 26.6 +19 57 44 0.4297 1.2342 110.6 50.4 22.6
...
2023 08 09 00 22 51.8 +24 13 00 0.4070 1.2608 118.7 44.9 22.3
...
2023 08 17 00 26 20.4 +25 43 19 0.3961 1.2776 124.1 41.0 22.2
...
2023 08 23 00 26 32.8 +26 25 21 0.3891 1.2912 128.8 37.6 22.1
2023 08 24 00 26 22.9 +26 30 00 0.3881 1.2936 129.6 37.0 22.1
2023 08 25 00 26 09.7 +26 33 57 0.3871 1.2959 130.4 36.4 22.1
...
2023 08 31 00 23 43.3 +26 42 33 0.3822 1.3106 135.7 32.6 22.0
...
2023 09 08 00 17 48.3 +26 11 26 0.3795 1.3310 143.2 27.0 21.8
...
2023 09 23 00 02 08.2 +23 03 32 0.3912 1.3717 156.7 16.8 21.6
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-Q116
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