MPEC 2021-C190 : 2021 CY4
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M.P.E.C. 2021-C190 Issued 2021 February 10, 20:47 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 CY4
Observations:
K21C04Y* C2021 02 09.24934007 59 43.08 +12 12 28.7 18.99gUEC190I41
K21C04Y C2021 02 09.24968807 59 41.95 +12 12 14.2 18.99gUEC190I41
K21C04Y C2021 02 09.25561307 59 22.91 +12 08 18.2 18.51RUEC190I41
K21C04Y C2021 02 09.25596107 59 21.73 +12 08 03.9 18.51RUEC190I41
K21C04Y mC2021 02 09.31889307 55 57.76 +11 25 49.7 18.14GVEC190I52
K21C04Y mC2021 02 09.31902507 55 57.32 +11 25 44.2 18.18GVEC190I52
K21C04Y mC2021 02 09.31915807 55 56.88 +11 25 38.4 18.26GVEC190I52
K21C04Y mC2021 02 09.31928807 55 56.48 +11 25 33.5 18.25GVEC190I52
K21C04Y C2021 02 09.33575207 55 04.02 +11 14 21.0 18.35RUEC190I41
K21C04Y C2021 02 09.33610007 55 02.92 +11 14 07.7 18.35RUEC190I41
K21C04Y C2021 02 09.33622707 55 02.49 +11 14 02.9 18.24RUEC190I41
K21C04Y C2021 02 09.33657407 55 01.43 +11 13 48.2 18.24RUEC190I41
K21C04Y C2021 02 09.65044 07 38 13.44 +07 34 06.9 18.8 GVEC190N88
K21C04Y C2021 02 09.65073 07 38 12.49 +07 33 55.3 18.8 GVEC190N88
K21C04Y C2021 02 09.65104 07 38 11.49 +07 33 41.5 18.6 GVEC190N88
K21C04Y C2021 02 09.65133 07 38 10.54 +07 33 29.1 18.7 GVEC190N88
K21C04Y C2021 02 09.65163 07 38 09.52 +07 33 17.0 18.6 GVEC190N88
K21C04Y 4C2021 02 09.85517 07 27 07.82 +05 05 58.5 18.2 GVEC190J04
K21C04Y 4C2021 02 09.85535 07 27 07.23 +05 05 50.0 18.3 GVEC190J04
K21C04Y 4C2021 02 09.85553 07 27 06.59 +05 05 41.8 18.7 GVEC190J04
K21C04Y 1C2021 02 09.86654 07 26 25.88 +04 56 53.3 19.2 VVEC190033
K21C04Y 1C2021 02 09.86688 07 26 24.72 +04 56 37.9 19.3 VVEC190033
K21C04Y 1C2021 02 09.86723 07 26 23.59 +04 56 22.7 19.3 VVEC190033
K21C04Y KC2021 02 10.07441 07 15 04.97 +02 23 37.8 19.2 GVEC190W34
K21C04Y KC2021 02 10.08194 07 14 39.80 +02 18 02.2 19.3 GVEC190W34
K21C04Y KC2021 02 10.08831 07 14 18.58 +02 13 17.9 18.9 GVEC190W34
K21C04Y KC2021 02 10.21005707 07 37.26 +00 42 16.3 18.2 VqEC190U55
K21C04Y KC2021 02 10.21152607 07 32.40 +00 41 10.5 18.6 VqEC190U55
K21C04Y KC2021 02 10.21302907 07 27.40 +00 40 03.2 18.4 VqEC190U55
K21C04Y KC2021 02 10.79771306 35 50.14 -06 27 44.7 19.0 GVEC190J95
K21C04Y KC2021 02 10.81489106 34 54.79 -06 39 54.9 19.3 GVEC190J95
K21C04Y KC2021 02 10.82428606 34 24.52 -06 46 33.1 19.1 GVEC190J95
K21C04Y KC2021 02 10.82872806 34 10.29 -06 49 41.6 19.6 GVEC190J95
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, C.
Hoegner, B. Stecklum. Measurer B. Stecklum. 1.34-m f/3 Schmidt + CCD.
I41 Palomar Mountain--ZTF. Observers B. T. Bolin, V. Bhalerao, C. M.
Copperwheat, K. P. Deshmukh, C.-Y. Hsu, Z.-Y. Lin, J. Purdum, S. Royle, K.
Sharma, C. Zhai, Z. T. F. Collaboration. Measurers B. T. Bolin, D. A.
Duev, H.-W. Lin, F. J. Masci, Q.-Z. Ye. 1.2-m f/2.4 Schmidt.
I52 Steward Observatory, Mt. Lemmon Station. Observer 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 A.
Knofel, D. Koschny, M. Busch, M. Micheli, E. Schwab, R. Kresken. 1.0-m
f/4.4 reflector + CCD.
J95 Great Shefford. Observer P. Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain
+ CCD.
N88 Xingming Observatory #3, Nanshan. Observer X. Gao. Measurer Q.-Z. Ye.
0.6-m f/8 Ritchey-Chretien + CCD.
U55 Golden Ears Observatory, Maple Ridge. Observer B. Kumar. 0.36-m f/7
Schmidt-Cassegrain + CCD.
W34 Squirrel Valley Observatory, Columbus. Observer R. L. Flynn. Measurers
R. L. Flynn, J. Gerlach. 0.36-m Schmidt-Cassegrain + CCD.
Orbital elements:
2021 CY4 Earth MOID = 0.0266 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 321.13272 (2000.0) P Q
n 0.36804009 Peri. 270.18787 -0.35017501 +0.75416913
a 1.9284393 Node 318.85239 -0.03641900 -0.60358815
e 0.6743604 Incl. 57.59264 -0.93597602 -0.25867020
P 2.68 H 23.5 G 0.15 U 8
Residuals in seconds of arc
210209 I41 0.2+ 0.6+ 210209 I41 1.1+ 0.9- 210209 033 0.1- 0.2-
210209 I41 0.1+ 0.0 210209 N88 0.3- 0.2- 210210 W34 0.0 0.4-
210209 I41 0.5+ 0.6+ 210209 N88 0.2- 0.7+ 210210 W34 0.7- 0.2-
210209 I41 0.3- 0.2+ 210209 N88 0.1+ 0.2+ 210210 W34 0.2- 0.4-
210209 I52 0.2- 0.2+ 210209 N88 0.2+ 0.3+ 210210 U55 0.3- 0.4+
210209 I52 0.4- 0.1+ 210209 N88 0.2- 1.1+ 210210 U55 0.0 0.2+
210209 I52 0.6- 0.3- 210209 J04 0.4+ 1.0+ 210210 U55 0.0 0.0
210209 I52 0.3- 0.0 210209 J04 0.6+ 0.4+ 210210 J95 0.0 0.2+
210209 I41 0.1+ 1.6- 210209 J04 0.1- 0.1+ 210210 J95 0.1- 0.1-
210209 I41 0.5+ 0.7- 210209 033 0.1- 0.0 210210 J95 0.4- 0.1+
210209 I41 0.2+ 0.3- 210209 033 0.6- 0.4- 210210 J95 0.6+ 0.3-
Ephemeris:
2021 CY4 a,e,i = 1.93, 0.67, 58 q = 0.6280
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 01 11 12 25 22.2 +41 36 53 0.6151 1.3698 116.0 40.2 24.7
...
2021 01 26 12 07 39.7 +41 06 12 0.3115 1.2066 129.4 39.1 22.9
...
2021 02 03 11 11 35.3 +38 30 53 0.1562 1.1171 144.9 30.5 21.0
...
2021 02 09 08 12 44.5 +14 54 31 0.06593 1.0493 161.3 17.6 18.6
2021 02 10 07 19 09.2 +03 20 43 0.06179 1.0379 144.9 33.1 18.9
2021 02 11 06 25 09.8 -08 46 07 0.06390 1.0266 126.9 50.2 19.5
...
2021 02 17 03 19 49.2 -37 00 00 0.1487 0.9590 74.5 96.9 22.8
...
2021 02 25 02 15 14.3 -40 42 29 0.2979 0.8709 58.3 104.8 24.4
...
2021 03 12 01 30 16.0 -40 22 37 0.5789 0.7240 46.1 98.8 25.2
M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-C190
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