MPEC 2021-C184 : 2021 CT4
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M.P.E.C. 2021-C184 Issued 2021 February 10, 13:59 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 CT4
Observations:
K21C04T* C2021 02 08.35762410 56 31.78 -02 51 11.0 21.90GVEC184G96
K21C04T C2021 02 08.36404210 56 33.03 -02 51 10.5 20.94GVEC184G96
K21C04T C2021 02 08.37159810 56 34.56 -02 51 11.3 20.91GVEC184G96
K21C04T C2021 02 08.37676010 56 35.59 -02 51 11.9 20.81GVEC184G96
K21C04T KC2021 02 08.44019610 56 48.31 -02 51 15.7 21.00GVEC184I52
K21C04T KC2021 02 08.44403310 56 49.09 -02 51 15.7 20.49GVEC184I52
K21C04T KC2021 02 08.44787310 56 49.87 -02 51 16.2 20.79GVEC184I52
K21C04T 2C2021 02 09.11189210 59 18.216-02 51 46.66 20.8 GVEC184J04
K21C04T 2C2021 02 09.11674810 59 19.217-02 51 46.83 21.0 GVEC184J04
K21C04T 2C2021 02 09.12160410 59 20.256-02 51 46.94 20.9 GVEC184J04
K21C04T KC2021 02 09.33713311 00 10.22 -02 51 56.8 20.48GVEC184I52
K21C04T KC2021 02 09.33965411 00 10.76 -02 51 56.6 20.68GVEC184I52
K21C04T KC2021 02 09.34217611 00 11.30 -02 51 56.7 20.79GVEC184I52
K21C04T KC2021 02 09.34469911 00 11.83 -02 51 57.1 21.50GVEC184I52
K21C04T 1C2021 02 09.98282 11 02 42.00 -02 52 18.4 21.0 VVEC184033
K21C04T 1C2021 02 09.98600 11 02 42.74 -02 52 18.4 21.2 VVEC184033
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, B. Stecklum. Measurer B. Stecklum. 1.34-m f/3 Schmidt + 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.
I52 Steward Observatory, Mt. Lemmon Station. Observers H. Groeller, D.
Rankin. 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.
J04 ESA Optical Ground Station, Tenerife. Observer D. Abreu. Measurers M.
Micheli, D. Koschny, L. Conversi, R. Kresken, A. Knofel, M. Busch, E.
Schwab. 1.0-m f/4.4 reflector + CCD.
Orbital elements:
2021 CT4 Earth MOID = 0.0346 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 311.38868 (2000.0) P Q
n 0.42814158 Peri. 57.02693 -0.83972190 +0.54053108
a 1.7434565 Node 155.57178 -0.53063207 -0.79651928
e 0.4704225 Incl. 7.20907 -0.11531147 -0.27089332
P 2.30 H 23.4 G 0.15 U 8
Residuals in seconds of arc
210208 G96 0.2+ 0.5- 210208 I52 0.1+ 0.1- 210209 I52 0.0 0.3+
210208 G96 0.3- 0.4+ 210209 J04 0.1+ 0.0 210209 I52 0.1- 0.0
210208 G96 0.0 0.1+ 210209 J04 0.1- 0.0 210209 033 0.1- 0.2-
210208 G96 0.0 0.2- 210209 J04 0.2+ 0.1+ 210209 033 0.1+ 0.2-
210208 I52 0.1- 0.1- 210209 I52 0.0 0.0
210208 I52 0.0 0.2+ 210209 I52 0.0 0.3+
Ephemeris:
2021 CT4 a,e,i = 1.74, 0.47, 7 q = 0.9233
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 11 09 58 24.3 -00 01 36 0.4537 1.3537 137.6 29.3 23.6
...
2021 01 26 10 22 15.4 -01 57 02 0.3057 1.2501 146.1 26.0 22.5
...
2021 02 03 10 40 02.5 -02 37 28 0.2365 1.1961 149.9 24.4 21.8
...
2021 02 09 10 58 52.7 -02 51 18 0.1890 1.1567 151.9 23.7 21.2
2021 02 10 11 02 45.2 -02 51 39 0.1815 1.1503 152.1 23.7 21.1
2021 02 11 11 06 54.4 -02 51 19 0.1741 1.1439 152.2 23.7 21.0
...
2021 02 17 11 39 48.0 -02 30 40 0.1325 1.1065 151.6 25.1 20.4
...
2021 02 25 13 03 07.4 -00 37 10 0.08793 1.0598 141.2 35.8 19.7
...
2021 03 12 18 00 02.9 +06 10 55 0.08668 0.9860 82.5 92.5 21.3
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-C184
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