MPEC 2021-J11 : 2021 CW4
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M.P.E.C. 2021-J11 Issued 2021 May 1, 14:04 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 CW4
Revision to MPEC 2021-C188
Additional Observations:
K21C04W C2017 05 21.46317916 17 47.929-14 20 10.21 23.26GVEJ011F51
K21C04W C2017 05 21.47554716 17 46.930-14 20 06.34 23.00GVEJ011F51
K21C04W C2019 05 04.45453614 26 15.951-11 04 56.05 22.30GVEJ011F51
K21C04W C2019 05 07.40305114 22 13.818-10 38 40.48 23.00GVEJ011F51
K21C04W C2019 05 07.41559114 22 12.759-10 38 33.81 22.33GVEJ011F51
K21C04W C2019 05 07.43019014 22 11.558-10 38 25.91 22.56GVEJ011F51
K21C04W C2019 05 07.44276514 22 10.513-10 38 19.46 22.34GVEJ011F51
K21C04W C2019 05 09.34583314 19 39.814-10 21 58.10 22.06GVEJ011F51
K21C04W C2019 05 09.35829614 19 38.833-10 21 51.81 22.30GVEJ011F51
K21C04W C2019 05 09.37074514 19 37.825-10 21 45.41 22.38GVEJ011F51
K21C04W C2019 05 09.38321114 19 36.813-10 21 39.15 22.30GVEJ011F51
K21C04W C2020 05 30.54873420 42 28.715-07 57 52.14 23.47GVEJ011F51
K21C04W C2020 05 30.56290020 42 28.880-07 57 46.79 22.78GVEJ011F51
K21C04W C2020 05 30.57710520 42 28.997-07 57 41.77 23.16GVEJ011F51
K21C04W C2020 05 30.59126720 42 29.170-07 57 36.38 22.64GVEJ011F51
K21C04W C2020 06 14.43203820 42 16.528-06 32 22.58 22.39GVEJ011F51
K21C04W C2020 06 14.44305220 42 16.324-06 32 19.12 23.26GVEJ011F51
K21C04W C2020 06 14.45406520 42 16.168-06 32 15.75 23.34GVEJ011F51
K21C04W C2020 06 14.46511720 42 15.945-06 32 12.38 22.98GVEJ011F51
K21C04W C2020 06 22.48352020 38 54.898-05 55 02.29 22.34GVEJ011F51
K21C04W C2020 06 22.51038020 38 53.891-05 54 55.92 22.21GVEJ011F51
K21C04W C2020 06 28.50226720 34 42.561-05 33 04.67 21.85GVEJ011F52
K21C04W C2020 06 28.51471820 34 41.880-05 33 02.54 21.95GVEJ011F52
K21C04W C2020 06 28.53962220 34 40.572-05 32 57.63 22.42GVEJ011F52
K21C04W C2020 07 01.55088820 32 00.129-05 24 16.64 22.54GVEJ011F52
K21C04W C2020 07 01.56212220 31 59.425-05 24 14.07 20.83GVEJ011F52
K21C04W C2020 07 01.58457920 31 58.102-05 24 10.70 21.18GVEJ011F52
K21C04W C2020 07 10.51463820 21 47.876-05 08 57.07 20.35GVEJ011F52
K21C04W C2020 07 10.55194620 21 44.798-05 08 56.11 22.13GVEJ011F52
K21C04W C2020 07 16.46334620 13 14.713-05 08 44.48 21.61GVEJ011F52
K21C04W C2020 07 16.48969020 13 12.172-05 08 45.70 21.75GVEJ011F52
K21C04W C2020 07 16.50282520 13 10.905-05 08 46.36 21.15GVEJ011F52
K21C04W C2020 07 23.45438720 01 39.586-05 19 48.51 20.73GVEJ011F52
K21C04W C2020 07 23.46670420 01 38.219-05 19 50.09 21.14GVEJ011F52
K21C04W C2020 07 23.47900920 01 36.880-05 19 52.11 20.99GVEJ011F52
K21C04W C2021 04 11.24193809 30 48.868+07 35 29.65 20.65GVEJ011F52
K21C04W C2021 04 11.26513509 30 51.720+07 35 33.14 20.73GVEJ011F52
K21C04W C2021 04 11.27670609 30 53.144+07 35 35.06 20.35GVEJ011F52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, 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, A. Schultz, I. Smith. Measurers S. Chastel, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
170521 F51 87.8+ 7.3+ 210411 F52 0.1+ 0.1+ MPO606161 -850 days
Orbital elements:
2021 CW4 PHA, Earth MOID = 0.0363 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 355.15095 (2000.0) P Q
n 0.42341369 Peri. 225.03655 +0.34659356 -0.93664395
a 1.7564109 Node 204.81714 +0.89103261 +0.34564552
e 0.5398816 Incl. 6.93864 +0.29314468 +0.05680924
P 2.33 H 19.7 G 0.15 U 1
Residuals in seconds of arc
170521 F51 0.4- 0.2- 210214 246 0.3+ 0.0 210225 160 0.4+ 1.0+
170521 F51 0.0 0.1- 210214 246 0.1+ 0.5- 210225 160 0.7+ 0.0
190504 F51 0.4+ 0.1+ 210214 246 1.2+ 0.4+ 210226 J95 0.1+ 0.3-
190507 F51 0.1+ 0.2- 210214 246 0.5- 0.4- 210226 J95 0.0 0.1-
190507 F51 0.1- 0.1- 210214 246 0.5- 0.8- 210226 J95 0.2- 0.0
190507 F51 0.0 0.2+ 210215 T08 0.3+ 0.2- 210226 J95 0.1- 0.0
190507 F51 0.0 0.0 210215 T08 0.1- 0.5+ 210228 K87 0.4- 0.8+
190509 F51 0.2- 0.0 210215 T08 0.5- 0.1- 210228 K87 0.4- 0.3+
190509 F51 0.2+ 0.0 210215 T08 0.3+ 0.2+ 210301 K87 0.1- 0.4+
190509 F51 0.1+ 0.1+ 210215 T08 0.3+ 0.0 210301 K87 0.1+ 0.3+
190509 F51 0.0 0.0 210215 T08 0.4- 0.1+ 210301 K87 0.4- 0.1+
200530 F51 0.0 0.0 210215 T08 0.1+ 0.5- 210301 160 0.6+ 1.3-
200530 F51 0.2+ 0.1+ 210215 T08 0.0 0.0 210301 160 1.7+ 1.4-
200530 F51 0.3- 0.2- 210215 595 0.0 0.4+ 210301 160 0.3+ 1.0-
200530 F51 0.1+ 0.1- 210215 595 0.0 0.2+ 210302 K87 0.3- 0.7+
200614 F51 0.3- 0.1- 210215 595 0.6- 0.2- 210302 K87 0.6+ 0.1-
200614 F51 0.4- 0.1+ 210216 T05 0.2- 0.3+ 210302 K87 0.4+ 0.0
200614 F51 0.2+ 0.1+ 210216 T05 0.4- 0.1+ 210302 160 0.3- 0.2-
200614 F51 0.2- 0.1+ 210216 T05 0.4- 0.0 210302 160 0.2+ 0.8+
200622 F51 0.1+ 0.1+ 210216 T05 0.4- 0.2+ 210302 160 0.3- 0.3-
200622 F51 0.0 0.1- 210216 474 0.1- 0.1+ 210305 K87 0.6- 0.1-
200628 F52 0.4+ 0.0 210216 474 0.4+ 0.0 210305 K87 0.0 0.4+
200628 F52 0.0 0.2- 210216 474 0.9- 0.2- 210305 K87 0.2- 0.2+
200628 F52 0.0 0.0 210216 474 0.1+ 0.8+ 210307 T08 0.0 0.1+
200701 F52 0.2+ 0.1- 210217 F52 0.0 0.1+ 210307 T08 0.1- 0.4+
200701 F52 0.2- 0.7+ 210217 F52 0.0 0.1+ 210307 T08 0.0 0.1+
200701 F52 0.1+ 0.5+ 210217 T05 0.1- 0.0 210307 T08 0.1- 0.4+
200710 F52 0.1- 0.7+ 210217 T05 0.0 0.1+ 210307 130 0.1- 0.6-
200710 F52 0.0 0.1- 210217 T05 0.1- 0.0 210307 130 0.4+ 0.3-
200716 F52 0.2+ 0.1+ 210217 T05 0.1- 0.2+ 210307 246 0.1- 0.3+
200716 F52 0.2+ 0.0 210219 I52 0.3- 0.2+ 210307 246 0.0 0.4+
200716 F52 0.2+ 0.1- 210219 I52 0.0 0.1+ 210307 246 0.3- 0.1-
200723 F52 0.5+ 0.2- 210219 I52 0.1+ 0.1+ 210307 246 0.1+ 0.6+
200723 F52 0.1+ 0.1+ 210219 I52 0.2- 0.1+ 210307 246 0.0 0.3+
200723 F52 0.1+ 0.1- 210219 474 0.0 0.0 210307 K74 0.4- 0.3-
210207 703 0.4- 0.5- 210219 474 0.1+ 0.0 210307 K74 0.1- 0.2-
210207 703 0.0 0.2+ 210219 474 0.1+ 0.0 210307 K74 0.3- 0.1-
210207 703 1.9- 0.7- 210220 474 0.1+ 0.1- 210310 I52 0.0 0.7-
210207 703 0.7+ 0.5- 210220 474 0.0 0.0 210310 I52 0.2+ 0.2-
210210 T08 0.5- 0.0 210220 474 0.1- 0.1- 210310 I52 0.0 0.2-
210210 T08 0.5+ 0.1- 210221 H21 0.1+ 0.1+ 210311 I52 0.2+ 0.2-
210210 T08 0.2- 0.1- 210221 H21 0.0 0.0 210311 I52 0.0 0.2-
210210 T08 0.3+ 0.5- 210221 H21 0.2- 0.0 210311 I52 0.7- 0.0
210210 K74 0.2- 0.2+ 210221 H21 0.0 0.0 210311 I52 0.6- 0.1-
210210 K74 0.5+ 0.5- 210221 H21 0.0 0.1- 210315 F52 0.0 0.1-
210210 J95 0.2+ 0.1+ 210221 I52 0.2+ 0.2+ 210315 F52 0.1+ 0.1-
210210 K74 0.0 0.0 210221 I52 0.0 2.2+ 210315 F52 0.0 0.1-
210210 J95 0.3+ 0.1+ 210221 I52 0.5+ 0.4- 210318 I52 0.3- 0.0
210210 K74 0.2- 0.1+ 210221 I52 0.4- 0.4- 210318 I52 0.1+ 0.1+
210210 J95 0.1- 0.3- 210221 K83 0.3+ 0.4+ 210318 I52 0.1- 0.0
210210 J95 0.3- 0.0 210221 K83 0.1+ 0.1+ 210318 I52 0.1+ 0.3+
210210 204 0.0 0.1+ 210221 K83 0.4+ 0.2+ 210319 T08 0.5+ 0.0
210210 204 0.0 0.0 210221 160 0.3- 0.6+ 210319 T08 0.2- 0.4+
210210 204 0.1+ 0.2+ 210221 160 0.0 0.2- 210319 T08 0.4- 0.1+
210210 J04 0.2- 0.2+ 210221 160 1.1- 1.2- 210319 T08 0.4- 0.3-
210210 J04 0.4- 0.0 210223 H21 0.0 0.5+ 210320 G96 0.0 0.0
210210 J04 0.2- 0.2+ 210223 H21 0.1- 0.6+ 210320 G96 0.1+ 0.0
210211 G96 0.0 0.1+ 210223 H21 0.0 0.1+ 210320 G96 0.0 0.0
210211 G96 0.0 0.0 210223 H21 0.1+ 0.1+ 210320 G96 0.0 0.1-
210211 G96 0.1- 0.0 210223 H21 0.1+ 0.0 210323 I52 0.1- 0.4-
210211 G96 0.3+ 0.1+ 210223 H21 0.1+ 0.2+ 210323 I52 0.3- 0.4+
210212 I52 0.3- 0.2- 210223 H21 0.4+ 0.1+ 210323 I52 0.2+ 0.3-
210212 I52 0.0 0.1+ 210223 T08 0.2+ 0.0 210330 I52 0.2- 0.2-
210212 I52 0.1- 0.2+ 210223 T08 0.4+ 0.1+ 210330 I52 0.8+ 0.5+
210212 I52 0.2- 0.1+ 210223 T08 0.4- 0.2+ 210330 I52 0.2+ 0.1+
210212 703 0.2- 0.2+ 210223 T08 0.3- 0.2- 210330 I52 0.8- 0.1+
210212 703 0.5+ 0.3- 210224 203 0.2- 0.0 210402 I52 0.6- 0.2-
210212 703 0.3+ 0.1- 210224 203 0.1+ 0.2+ 210402 I52 0.2+ 0.6-
210212 703 0.6+ 0.1- 210224 203 0.0 0.1+ 210402 I52 0.5- 0.5-
210212 T05 0.2+ 0.4- 210225 W46 0.4- 0.2- 210408 G96 0.3+ 0.1+
210212 T05 0.2- 0.3- 210225 W46 0.6+ 0.1- 210408 G96 0.1- 0.1-
210212 T05 2.2+ 0.0 210225 W46 0.8- 0.1- 210408 G96 0.6+ 0.2-
210212 T05 0.2- 0.3+ 210225 W33 0.0 0.2+ 210408 G96 0.0 0.0
210212 474 0.1+ 0.0 210225 W33 0.1+ 0.0 210411 F52 0.1- 0.1+
210212 474 0.0 0.2+ 210225 W33 0.1- 0.1- 210411 F52 0.1+ 0.0
210212 474 0.0 0.1- 210225 Z80 1.1+ 0.3+ 210411 F52 0.3+ 0.1+
210212 474 0.1+ 0.1+ 210225 Z80 0.2+ 0.1+ 210415 F52 0.1+ 0.2+
210214 246 0.0 0.2- 210225 Z80 0.7+ 0.2- 210415 F52 0.1+ 0.1+
210214 246 0.3- 0.2+ 210225 160 0.2- 0.1- 210415 F52 0.1- 0.1-
Ephemeris:
2021 CW4 a,e,i = 1.76, 0.54, 7 q = 0.8082
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2021 04 01 09 07 29.5 +06 47 47 0.5675 1.4068 125.5 35.3 20.7
...
2021 04 16 09 40 38.8 +07 44 07 0.7650 1.5266 118.7 35.2 21.5
...
2021 04 24 09 56 14.1 +07 43 33 0.8795 1.5884 114.7 35.1 21.9
...
2021 04 30 10 07 20.1 +07 33 03 0.9689 1.6337 111.5 35.0 22.1
2021 05 01 10 09 08.7 +07 30 35 0.9841 1.6411 111.0 35.0 22.2
2021 05 02 10 10 56.7 +07 27 56 0.9994 1.6486 110.4 34.9 22.2
...
2021 05 08 10 21 33.4 +07 08 22 1.0924 1.6926 107.2 34.7 22.5
...
2021 05 16 10 35 18.7 +06 33 41 1.2201 1.7498 102.9 34.3 22.8
...
2021 05 31 11 00 14.4 +05 08 07 1.4679 1.8521 94.8 33.1 23.3
A. U. Tomatic (C) Copyright 2021 MPC M.P.E.C. 2021-J11
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