MPEC 2023-N21 : 2020 NC
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M.P.E.C. 2023-N21 Issued 2023 July 7, 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
2020 NC
Revision to MPEC 2020-N23
Additional Observations:
K20N00C KC2023 06 30.15809910 13 57.370+27 24 36.50 20.27GVEN021I52
K20N00C KC2023 06 30.16238710 14 03.160+27 23 31.20 20.76GVEN021I52
K20N00C KC2023 06 30.16667610 14 08.990+27 22 26.10 20.42GVEN021I52
K20N00C KC2023 06 30.17097410 14 14.790+27 21 20.50 20.37GVEN021I52
K20N00C 6C2023 07 05.89435112 12 26.699+00 10 43.67 18.6 GVEN021Z84
K20N00C 6C2023 07 05.89487512 12 27.217+00 10 35.76 18.4 GVEN021Z84
K20N00C KB2023 07 06.12847 12 16 24.24 -00 51 21.4 18.7 rZEN021H36
K20N00C KB2023 07 06.13226 12 16 27.88 -00 52 21.2 18.7 rZEN021H36
K20N00C KB2023 07 06.13697 12 16 32.34 -00 53 36.3 18.2 rZEN021H36
K20N00C KC2023 07 06.82477412 27 38.484-03 47 57.66 18.7 rZEN021L34
K20N00C KC2023 07 06.84812612 27 59.345-03 53 39.01 18.9 rZEN021L34
Observer details:
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.56-m f/4.2 .56 meter
reflector + CMO.
I52 Steward Observatory, Mt. Lemmon Station. Observer J. K. Hogan. Measurers
E. J. Christensen, 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, A. Serrano, F. C. Shelly, K. W.
Wierzchos. 1.0-m prime focus + CCD.
L34 Galhassin Robotic Telescope, Isnello. Observer A. Nastasi. 0.40-m f/3.8
400mm Reflector + CCD.
Z84 Calar Alto-Schmidt. Observers M. Micheli, R. Kresken. Measurers R.
Kresken, M. Micheli, F. Ocana, L. Conversi. 0.8-m f/3 Schmidt + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
230630 I52 0.34+ 0.26+ 230706 L34 0.05+ 0.13+ MPO562951 -0.01 days
Orbital elements:
2020 NC Earth MOID = 0.0024 AU
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5 Veres
M 317.36496 (2000.0) P Q
n 1.31481596 Peri. 29.43293 -0.65508997 -0.74829602
a 0.8252004 Node 101.70206 +0.67068361 -0.63958151
e 0.2921179 Incl. 6.12333 +0.34790893 -0.17603567
P 0.75 H 22.21 G 0.15 U 1
Residuals in seconds of arc
200706 T08 1.0- 1.0+ 200708 H21 0.2+ 0.0 200724 474 0.1- 0.2+
200706 T08 0.2- 0.7+ 200708 H21 0.0 0.2- 200724 474 0.1+ 0.0
200706 T08 0.9+ 0.0 200708 H21 0.1+ 0.0 200724 474 0.0 0.1+
200706 T08 0.9+ 0.1- 200708 H21 0.2- 0.1+ 200724 474 0.1+ 0.1+
200706 T08 0.4+ 0.6+ 200708 734 0.1+ 0.0 200810 474 0.1- 0.1+
200706 T08 1.1+ 0.4- 200708 734 0.5+ 0.2- 200810 474 0.0 0.1-
200706 T05 0.2+ 0.2+ 200708 734 0.6+ 0.2- 200810 474 0.1- 0.1-
200707 T08 0.3+ 0.0 200708 734 1.3+ 1.2- 200810 474 0.0 0.1-
200707 T08 0.0 0.2- 200708 734 0.1+ 0.1+ 200822 474 0.2- 0.2+
200707 T08 0.3+ 0.1- 200708 734 0.4+ 0.3+ 200822 474 0.2+ 0.0
200707 T08 0.3- 0.4+ 200708 204 0.1+ 0.0 200822 474 0.3- 0.2+
200707 T08 0.4+ 0.3+ 200708 204 0.5+ 0.1- 200822 474 0.4+ 0.0
200707 T08 0.4+ 0.4- 200711 I52 (2.0- 0.3+) 230630 I52 0.1+ 0.1+
200707 T08 0.2+ 0.1- 200711 I52 0.3- 0.6- 230630 I52 0.0 0.0
200707 T05 0.0 0.6- 200711 I52 0.0 0.1- 230630 I52 0.2+ 0.2+
200707 T05 0.3+ 0.5+ 200711 I52 0.1- 0.1- 230630 I52 0.2- 0.1+
200707 T05 0.2- 0.8- 200713 T08 0.2+ 0.1- 230705 Z84 0.1- 0.3-
200707 T05 0.7- 0.8+ 200713 T08 0.3+ 0.1+ 230705 Z84 0.0 0.2+
200707 L34 1.2- 0.3+ 200713 T08 0.2+ 0.2+ 230706 H36 0.3+ 0.2+
200707 L34 0.7- 0.8- 200713 T08 0.1- 0.0 230706 H36 0.8+ 0.1-
200707 L34 0.3- 0.1+ 200717 474 0.0 0.2+ 230706 H36 0.4+ 1.2-
200707 958 0.9- 0.6+ 200717 474 0.0 0.1+ 230706 L34 0.6+ 0.3-
200707 958 0.0 0.4- 200717 474 0.1- 0.1+ 230706 L34 0.6+ 0.2-
Ephemeris:
2020 NC a,e,i = 0.83, 0.29, 6 q = 0.5841
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 06 07 05 42 13.4 +43 30 10 0.1287 0.8974 22.8 154.1 26.8
...
2023 06 22 07 33 46.4 +43 53 56 0.06067 0.9632 28.1 150.3 24.5
...
2023 06 30 10 10 31.5 +28 04 22 0.03792 0.9920 48.8 129.6 20.8
...
2023 07 06 12 14 23.5 -00 14 54 0.03872 1.0107 80.0 97.8 18.7
2023 07 07 12 30 29.3 -04 27 57 0.04058 1.0135 84.4 93.3 18.6
2023 07 08 12 45 10.7 -08 15 29 0.04281 1.0163 88.3 89.3 18.6
...
2023 07 14 13 49 29.2 -23 08 01 0.06121 1.0315 102.4 74.3 18.8
...
2023 07 22 14 37 54.7 -31 30 56 0.09148 1.0475 107.7 67.6 19.5
...
2023 08 06 15 28 34.9 -37 13 27 0.1514 1.0645 105.4 66.8 20.6
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-N21
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