[Iaude] MPEC S113: 2021 SZ4 [a=1.54,e=0.81,i=26.4,H=20.48]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Wed Sep 20 10:11:15 EDT 2023
M.P.E.C. 2023-S113 Issued 2023 September 20, 14:09 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
2021 SZ4
Revision to MPEC 2021-T96
Additional Observations:
K21S04Z KC2019 10 15.38915200 09 12.138-20 11 00.71 22.29GVES113F52
K21S04Z C2019 10 24.32131423 42 19.454-20 35 36.81 22.38GVES113F52
K21S04Z C2019 10 24.33166723 42 17.575-20 35 36.68 22.57GVES113F52
K21S04Z C2019 10 24.34194823 42 15.722-20 35 36.86 21.91GVES113F52
K21S04Z C2019 10 24.35223723 42 13.880-20 35 37.29 22.20GVES113F52
K21S04Z C2023 09 10.54993103 16 39.855+04 38 04.64 21.93GVES113F51
K21S04Z 0C2023 09 13.57667303 18 59.973+04 50 43.22 22.38GVES113T12
K21S04Z 0C2023 09 13.57907303 19 00.074+04 50 43.87 22.39GVES113T12
K21S04Z 0C2023 09 13.58205103 19 00.196+04 50 44.66 22.36GVES113T12
K21S04Z 0C2023 09 15.56525203 20 27.474+04 59 32.85 22.17GVES113T12
K21S04Z 0C2023 09 15.58227803 20 28.126+04 59 37.51 22.07GVES113T12
K21S04Z 1C2023 09 19.38622503 23 04.103+05 18 07.81 21.30GVES113G96
K21S04Z 1C2023 09 19.39142503 23 04.312+05 18 09.32 21.67GVES113G96
K21S04Z 1C2023 09 19.39661703 23 04.470+05 18 10.12 21.84GVES113G96
K21S04Z 1C2023 09 19.40182103 23 04.686+05 18 12.82 20.91GVES113G96
K21S04Z KC2023 09 19.43659 03 23 05.85 +05 18 24.1 21.9 RoES113291
K21S04Z KC2023 09 19.44694 03 23 06.20 +05 18 27.3 21.9 RoES113291
K21S04Z KC2023 09 19.45730 03 23 06.53 +05 18 30.8 21.8 RoES113291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
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.
G96 Mt. Lemmon Survey. 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. 1.5-m reflector + 10K
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
191015 F52 20.8- 15.1- 230919 291 92.9- 55.9- E2021-X08 +0.03 days
Orbital elements:
2021 SZ4 PHA, Earth MOID = 0.0356 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 315.06868 (2000.0) P Q
n 0.51420132 Peri. 129.57138 -0.88871064 -0.40676846
a 1.5430521 Node 28.39461 +0.14290794 -0.68411660
e 0.8072193 Incl. 26.40792 +0.43562681 -0.60541216
P 1.92 H 20.48 G 0.15 U 1
Residuals in seconds of arc
191015 F52 0.1- 0.1- 211003 691 0.0 0.1+ 211109 V06 0.3- 0.1-
191024 F52 0.3+ 0.4+ 211003 691 0.4- 0.2+ 211109 V06 1.0- 0.5+
191024 F52 0.1- 0.5+ 211003 691 0.2- 0.1+ 211115 807 0.1- 0.1+
191024 F52 0.3- 0.3+ 211023 F52 0.4- 0.1+ 211115 807 0.2+ 0.1+
191024 F52 0.3- 0.2- 211023 F52 0.0 0.1+ 211115 807 0.1+ 0.1-
210904 F51 0.1+ 0.1- 211023 F52 0.1+ 0.1- 211201 291 0.4- 0.0
210904 F51 0.2+ 0.2- 211024 291 0.1- 0.1- 211201 291 0.8- 0.7-
210904 F51 0.3+ 0.1- 211024 291 0.0 0.1+ 211201 291 1.3+ 0.7+
210904 F51 0.4+ 0.2+ 211024 291 0.3- 0.1+ 230910 F51 0.5+ 0.0
210915 F52 0.0 0.2+ 211031 I52 (2.1+ 0.1-) 230913 T12 0.0 0.0
210915 F52 0.2+ 0.0 211031 I52 1.8+ 0.0 230913 T12 0.0 0.0
210915 F52 0.0 0.1+ 211031 I52 (2.0+ 0.3+) 230913 T12 0.1+ 0.1+
210915 F52 0.0 0.1+ 211031 I52 0.0 0.1- 230915 T12 0.0 0.1+
210930 F52 0.0 0.3+ 211101 G96 0.1- 0.2+ 230915 T12 0.0 0.1+
210930 F52 0.0 0.0 211101 G96 0.2- 0.5+ 230919 G96 0.1- 0.2+
210930 F52 0.1- 0.3+ 211101 G96 0.0 0.4+ 230919 G96 0.3+ 0.1+
210930 F52 0.0 0.1+ 211101 G96 0.1+ 0.2- 230919 G96 0.0 0.8-
210930 F51 0.0 0.1- 211105 691 0.2- 0.4+ 230919 G96 0.5+ 0.3+
210930 F51 0.1+ 0.1+ 211105 691 0.2+ 0.0 230919 291 0.0 0.1+
211001 V06 0.2- 0.3- 211105 691 0.1+ 0.2+ 230919 291 0.1- 0.1+
211001 V06 0.4- 0.0 211109 691 0.4- 0.0 230919 291 0.4- 0.3+
211001 V06 0.3- 0.2+ 211109 691 0.2+ 0.4+
211001 V06 0.1+ 0.1- 211109 691 0.1+ 0.4+
Ephemeris:
2021 SZ4 a,e,i = 1.54, 0.81, 26 q = 0.2975
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 08 21 02 57 55.3 +03 20 37 1.2666 1.8020 104.0 33.0 23.7
...
2023 09 05 03 12 02.5 +04 16 31 0.9591 1.6541 114.4 33.7 22.9
...
2023 09 13 03 18 33.8 +04 48 17 0.7987 1.5686 120.2 33.7 22.4
...
2023 09 19 03 22 48.7 +05 16 13 0.6809 1.5012 124.8 33.4 21.9
2023 09 20 03 23 27.4 +05 21 29 0.6614 1.4896 125.5 33.3 21.8
2023 09 21 03 24 04.8 +05 26 58 0.6421 1.4780 126.3 33.2 21.8
...
2023 09 27 03 27 21.9 +06 06 33 0.5274 1.4065 131.1 32.5 21.2
...
2023 10 05 03 30 08.0 +07 31 54 0.3785 1.3059 137.9 30.9 20.3
...
2023 10 20 03 19 15.3 +19 42 35 0.1140 1.0991 153.4 23.9 17.1
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-S113
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