[Iaude] MPEC J11: 2021 CW4 [a=1.76,e=0.54,i=6.9,H=19.7]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sat May 1 10:05:40 EDT 2021


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 at 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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