[Iaude] MPEC U242: 2021 CE2 [a=1.24,e=0.11,i=21.3,H=22.94]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Wed Oct 25 10:21:12 EDT 2023
M.P.E.C. 2023-U242 Issued 2023 October 25, 14:19 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 CE2
Revision to MPEC 2021-C74
Additional Observations:
K21C02E ;C2017 07 22.33827 23 58 56.98 +07 08 08.6 22.8 rVEU242W84
K21C02E ;C2017 07 26.31442 00 05 15.31 +04 12 56.8 22.8 rVEU242W84
K21C02E 4C2017 07 30.49733 00 11 14.64 +00 44 54.9 22.6 r1EU242T09
K21C02E 4C2017 07 30.52911 00 11 16.93 +00 43 15.1 22.8 r1EU242T09
K21C02E 4C2017 07 30.53963 00 11 17.68 +00 42 41.7 22.6 r1EU242T09
K21C02E 4C2017 07 30.57169 00 11 19.95 +00 41 00.4 22.6 r1EU242T09
Observer details:
T09 Subaru Telescope, Maunakea. Observers H. Aihara, Y. AlSayyad, M. Ando, R.
Armstrong, J. Bosch, E. Egami. Measurer M. Suzuki. 8.2-m f/2.0
reflector + CCD(HSC).
W84 Cerro Tololo-DECam. Observer . Measurer P. VanWylen. 4.0-m reflector +
CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
170722 W84 0.12+ 0.04+ 170730 T09 0.14+ 0.02+ MPO606149 -0.00 days
Orbital elements:
2021 CE2 Earth MOID = 0.2098 AU
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5 Veres
M 242.57163 (2000.0) P Q
n 0.71463031 Peri. 83.16644 -0.68430464 +0.69088805
a 1.2390298 Node 140.12119 -0.72485936 -0.67933194
e 0.1068351 Incl. 21.33219 +0.07941074 -0.24734960
P 1.38 H 22.94 G 0.15 U 3
Residuals in seconds of arc
170722 W84 0.0 0.2- 210206 I52 0.3+ 0.0 210218 291 0.5- 0.2+
170726 W84 0.0 0.1- 210206 474 0.0 0.2- 210218 291 0.1- 0.1-
170730 T09 0.2- 0.9+ 210206 474 0.0 0.1- 210218 291 0.0 0.1-
170730 T09 0.1+ 1.3+ 210206 474 0.3- 0.2- 210302 H21 1.2+ 0.0
170730 T09 0.1+ 1.0+ 210206 474 0.3- 0.4- 210302 H21 0.4+ 0.1-
170730 T09 0.2+ 0.9+ 210207 I52 0.3- 0.2+ 210302 H21 0.8- 0.1-
210206 G96 0.1- 0.2- 210207 I52 0.3- 0.2- 210303 H21 0.1- 0.2-
210206 G96 0.1+ 0.2- 210207 I52 0.1+ 0.1- 210303 H21 0.4- 0.0
210206 G96 0.1+ 0.0 210209 I52 0.1- 0.3+ 210303 H21 0.3- 0.1-
210206 F52 0.0 0.3+ 210209 I52 0.3- 0.2- 210306 H21 0.0 0.4+
210206 F52 0.1+ 0.1+ 210209 I52 0.1- 0.3- 210306 H21 0.0 0.8+
210206 F52 0.1- 0.3+ 210209 I52 0.2- 0.0 210306 H21 0.0 0.5+
210206 F52 0.0 0.1- 210210 I52 0.2+ 0.0 210308 H21 0.3+ 0.7-
210206 I52 0.0 0.0 210210 I52 0.0 0.0 210308 H21 0.2+ 0.2-
210206 I52 0.1+ 0.1- 210210 I52 0.0 0.4+
Ephemeris:
2021 CE2 a,e,i = 1.24, 0.11, 21 q = 1.1067
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2023 09 25 09 11 35.6 +06 51 47 1.8142 1.2938 43.9 32.5 26.2
...
2023 10 10 09 58 32.9 +05 00 02 1.7316 1.2712 46.5 34.8 26.1
...
2023 10 18 10 24 02.2 +03 54 41 1.6857 1.2585 47.9 36.0 26.0
...
2023 10 24 10 43 24.6 +03 04 00 1.6507 1.2488 49.0 37.0 26.0
2023 10 25 10 46 39.9 +02 55 27 1.6449 1.2472 49.2 37.1 26.0
2023 10 26 10 49 55.5 +02 46 53 1.6390 1.2455 49.3 37.3 26.0
...
2023 11 01 11 09 39.9 +01 55 07 1.6039 1.2356 50.4 38.2 26.0
...
2023 11 09 11 36 29.2 +00 45 52 1.5571 1.2224 51.7 39.5 25.9
...
2023 11 24 12 28 32.8 -01 19 44 1.4718 1.1977 54.0 41.9 25.8
A. U. Tomatic (C) Copyright 2023 MPC M.P.E.C. 2023-U242
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