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  • MPEC 2020-C139 : 2018 CW2

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    M.P.E.C. 2020-C139                            Issued 2020 February 15, 18:16 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
    
                                    2018 CW2                                 
    
    
                               Revision to MPEC 2018-C95                            
    
    Additional Observations:
         K18C02W  C2020 02 14.24787510 53 32.34 +34 06 56.1                UEC139I41
         K18C02W  C2020 02 14.24822210 53 31.56 +34 07 02.6                UEC139I41
         K18C02W  C2020 02 14.31025510 51 29.94 +34 26 10.7          18.49RUEC139I41
         K18C02W  C2020 02 14.31060210 51 29.21 +34 26 17.1          18.49RUEC139I41
         K18C02W  C2020 02 14.32531310 50 59.50 +34 30 49.8          18.61RUEC139I41
         K18C02W  C2020 02 14.32566010 50 58.75 +34 30 55.9          18.61RUEC139I41
         K18C02W  C2020 02 14.32576410 50 58.57 +34 30 58.7          18.51RUEC139I41
         K18C02W  C2020 02 14.32611110 50 57.86 +34 31 04.9          18.51RUEC139I41
         K18C02W NC2020 02 14.80673510 34 06.37 +37 02 21.0          18.8 GVEC139L01
         K18C02W NC2020 02 14.80767810 34 04.06 +37 02 41.1          18.7 GVEC139L01
         K18C02W NC2020 02 14.80855210 34 01.92 +37 02 59.8          18.6 GVEC139L01
         K18C02W NC2020 02 14.80942310 33 59.76 +37 03 18.2          18.5 GVEC139L01
         K18C02W KC2020 02 14.86406210 31 42.87 +37 22 41.6          18.9 GVEC139L01
         K18C02W KC2020 02 14.86505410 31 40.30 +37 23 02.8          18.6 GVEC139L01
         K18C02W KC2020 02 14.86591910 31 38.09 +37 23 21.4          18.7 GVEC139L01
         K18C02W KC2020 02 14.86678910 31 35.83 +37 23 40.0          18.7 GVEC139L01
         K18C02W KC2020 02 14.86765910 31 33.62 +37 23 58.4          18.8 GVEC139L01
         K18C02W KC2020 02 14.88874 10 30 42.94 +37 31 03.5          18.6 VqEC139I93
         K18C02W KC2020 02 14.89312 10 30 31.58 +37 32 37.7          18.6 VqEC139I93
         K18C02W KC2020 02 14.89547 10 30 23.40 +37 33 45.8                qEC139C77
         K18C02W KC2020 02 14.89750 10 30 20.20 +37 34 11.9          18.5 VqEC139I93
         K18C02W KC2020 02 14.89885 10 30 14.66 +37 34 57.9                qEC139C77
         K18C02W KC2020 02 14.90230 10 30 05.53 +37 36 12.3                qEC139C77
         K18C02W KC2020 02 14.90767 10 29 50.63 +37 38 02.4          18.5 GVEC139203
         K18C02W KC2020 02 14.91524 10 29 34.08 +37 40 37.1          19.4 VqEC139958
         K18C02W KC2020 02 14.91765 10 29 24.18 +37 41 35.6          18.9 GVEC139203
         K18C02W KC2020 02 14.92134 10 29 17.95 +37 42 47.8          19.1 VqEC139958
         K18C02W KC2020 02 14.92451 10 29 09.54 +37 43 56.3          19.1 VqEC139958
         K18C02W KC2020 02 14.92755 10 29 01.38 +37 45 01.4          18.9 VqEC139958
         K18C02W KC2020 02 14.92883 10 28 54.32 +37 45 34.1          19.0 GVEC139203
         K18C02W HC2020 02 14.95353 10 27 47.53 +37 54 19.0                VEC139204
         K18C02W KC2020 02 14.95361 10 27 46.93 +37 54 34.5          18.8 GVEC139K63
         K18C02W KC2020 02 14.95760 10 27 35.90 +37 56 00.0          19.2 GVEC139K63
         K18C02W KC2020 02 14.96046 10 27 28.60 +37 56 46.5                VEC139204
         K18C02W KC2020 02 14.96194 10 27 24.03 +37 57 31.6          19.0 GVEC139K63
         K18C02W KC2020 02 14.96528 10 27 13.56 +37 58 32.0          19.1 GVEC139595
         K18C02W KC2020 02 14.96738 10 27 09.60 +37 59 13.9          19.1 GVEC139204
         K18C02W KC2020 02 14.96992 10 27 00.81 +38 00 10.1          19.0 GVEC139595
         K18C02W KC2020 02 14.97456 10 26 47.97 +38 01 49.0          18.8 GVEC139595
         K18C02W KC2020 02 14.97919 10 26 35.16 +38 03 26.5          19.0 GVEC139595
         K18C02W KC2020 02 14.97957 10 26 35.24 +38 03 47.6          18.4 RVEC139160
         K18C02W KC2020 02 14.98146 10 26 30.03 +38 04 28.0          18.3 RVEC139160
         K18C02W KC2020 02 14.98239 10 26 27.45 +38 04 47.3          18.4 RVEC139160
         K18C02W KC2020 02 14.98334 10 26 24.79 +38 05 07.1          18.3 RVEC139160
         K18C02W KC2020 02 14.98520 10 26 19.61 +38 05 47.1          18.1 RVEC139160
         K18C02W KC2020 02 15.08970 10 21 20.97 +38 42 21.4          17.8 GVEC139104
         K18C02W KC2020 02 15.09147 10 21 15.80 +38 42 58.4          17.7 GVEC139104
         K18C02W KC2020 02 15.09324 10 21 10.63 +38 43 35.1          17.8 GVEC139104
         K18C02W KC2020 02 15.09501 10 21 05.45 +38 44 11.9          17.9 GVEC139104
         K18C02W KC2020 02 15.11578910 20 06.08 +38 51 35.2          18.0 GVEC139C95
         K18C02W KC2020 02 15.12487 10 20 15.36 +38 55 20.0          18.1 GVEC139W34
         K18C02W IC2020 02 15.12873 10 20 03.91 +38 56 46.5          17.6 GVEC139W34
         K18C02W KC2020 02 15.13094 10 20 02.60 +38 55 40.7          17.9 GVEC139V01
         K18C02W KC2020 02 15.13428710 19 11.23 +38 58 00.4          18.1 GVEC139C95
         K18C02W KC2020 02 15.13435 10 19 47.22 +38 58 53.3          18.1 GVEC139W34
         K18C02W KC2020 02 15.13877 10 19 34.03 +39 00 32.9          18.2 GVEC139W34
         K18C02W KC2020 02 15.14056 10 19 34.73 +38 59 20.5          18.3 GVEC139V01
         K18C02W KC2020 02 15.14464 10 19 16.51 +39 02 45.5          18.2 GVEC139W34
         K18C02W KC2020 02 15.15226510 18 17.67 +39 04 14.0          18.0 GVEC139C95
         K18C02W KC2020 02 15.17869 10 17 34.64 +39 15 25.2          18.3 VqEC139850
         K18C02W KC2020 02 15.18343 10 17 27.67 +39 15 37.2          18.7 GVEC139V01
         K18C02W KC2020 02 15.18447 10 17 16.76 +39 17 33.7          18.9 VqEC139850
         K18C02W KC2020 02 15.19241 10 17 00.50 +39 19 02.1          18.7 GVEC139V01
         K18C02W KC2020 02 15.21426910 15 44.33 +39 28 08.6          19.1 VuEC139H21
         K18C02W KC2020 02 15.21504510 15 41.91 +39 28 26.1          19.0 VuEC139H21
         K18C02W KC2020 02 15.21582210 15 39.48 +39 28 43.4          19.0 VuEC139H21
         K18C02W  C2020 02 15.21675 10 15 47.35 +39 29 08.4          19.0 GVEC139I52
         K18C02W KC2020 02 15.21679310 15 36.42 +39 29 04.9          19.0 VuEC139H21
         K18C02W  C2020 02 15.21708 10 15 46.34 +39 29 15.5          18.9 GVEC139I52
         K18C02W  C2020 02 15.21740 10 15 45.34 +39 29 23.2          18.9 GVEC139I52
         K18C02W  C2020 02 15.21772 10 15 44.32 +39 29 30.6          18.9 GVEC139I52
         K18C02W KC2020 02 15.21795710 15 32.76 +39 29 31.1          19.2 VuEC139H21
         K18C02W  C2020 02 15.26630810 13 12.53 +39 47 40.3          18.74RUEC139I41
         K18C02W  C2020 02 15.26665510 13 11.30 +39 47 48.3          18.74RUEC139I41
         K18C02W  C2020 02 15.26723410 13 09.61 +39 48 01.3          18.85RUEC139I41
         K18C02W  C2020 02 15.26758110 13 08.33 +39 48 09.0          18.85RUEC139I41
         K18C02W  C2020 02 15.27961810 12 29.50 +39 52 42.1          18.56RUEC139I41
         K18C02W  C2020 02 15.27996510 12 28.33 +39 52 49.4          18.56RUEC139I41
         K18C02W  C2020 02 15.30397010 11 09.50 +40 01 53.0          19.04gUEC139I41
         K18C02W  C2020 02 15.30431710 11 08.35 +40 02 00.6          19.04gUEC139I41
         K18C02W KC2020 02 15.73754 09 45 57.45 +42 40 05.6          17.9 RVEC139K61
         K18C02W KC2020 02 15.74008 09 45 47.31 +42 41 06.4          18.1 RVEC139K61
         K18C02W KC2020 02 15.74182 09 45 40.32 +42 41 47.5          18.1 RVEC139K61
    
    Observer details:
    104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers P. 
       Bacci, L. Tesi, G. Fagioli.  0.60-m reflector + CCD.
    160 Castelmartini.  Observers M. Jaeger, E. Prosperi, S. Prosperi.  Measurer E. 
       Prosperi.  0.35-m f/10 Schmidt-Cassegrain + CCD.
    203 GiaGa Observatory.  Observers S. Foglia, G. Galli.  Measurer G. Galli.  
        0.36-m f/5.76 Schmidt-Cassegrain + CCD.
    204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector + CCD.
    595 Farra d'Isonzo.  Observer E. Pettarin.  0.40-m f/5.15 reflector + CCD.
    850 Cordell-Lorenz Observatory, Sewanee.  Observer D. T. Durig.  0.3-m f/5.0 
       Schmidt-Cassegrain + CCD.
    958 Observatoire de Dax.  Observer P. Dupouy.  0.51-m f/6 reflector + CCD.
    C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4.0 reflector + CCD.
    C95 SATINO Remote Observatory, Haute Provence.  Observer J. Jahn.  0.60-m f/3.2 
       Newtonian reflector + CCD.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.  
        Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.76-m f/3.0 
       astrograph + CCD.
    I41 Palomar Mountain--ZTF.  Observers B. T. Bolin, K. P. Deshmukh, J. 
       Southworth, Z. T. F. Collaboration.  Measurers B. T. Bolin, C. M. 
       Copperwheat, 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. C. Fuls.  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.
    I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
    K61 Rokycany Observatory.  Observer M. Adamovsky.  0.51-m f/6.8 reflector + CCD.
    K63 G. Pascoli Observatory, Castelvecchio Pascoli.  Observers R. Bacci, P. 
       Bacci.  Measurer R. Bacci.  0.4-m f/3.2 Newtonian reflector + CCD.
    L01 Visnjan Observatory, Tican.  Observers K. Korlevic, F. Valentine.  Measurer 
       K. Korlevic.  1.0-m f/2.9 reflector + CCD.
    V01 Mountainville Observatory, Alpine.  Observer B. Sheets.  0.35-m f/11.0 
       Schmidt-Cassegrain + CCD.
    W34 Squirrel Valley Observatory, Columbus.  Observer R. L. Flynn.  0.35-m f/1.9 
       Schmidt-Cassegrain + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
    200214 I41   36-   27-    200215 K61   49-   37-    MPO435642   -2.12 days
    
    Orbital elements:
    2018 CW2                                                 Earth MOID = 0.0044 AU
    Epoch 2020 May 31.0 TT = JDT 2459000.5                  Veres
    M  32.52189              (2000.0)            P               Q
    n   1.48125752     Peri.  327.19615     +0.48957513     +0.87102161
    a   0.7621650      Node   332.05421     -0.78024792     +0.41689120
    e   0.4210473      Incl.    4.95366     -0.38926775     +0.25985205
    P   0.67           H   25.8           G   0.15           U   5
    Residuals in seconds of arc
    180209 G96  0.6+  0.2-    200214 I41  0.4+  0.9+    200215 104  0.2+  0.4-
    180209 G96  0.1+  0.3-    200214 L01  0.0   0.1-    200215 104  0.2+  0.2-
    180209 G96  0.5+  0.7-    200214 L01  0.1-  0.0     200215 104  0.3+  0.4-
    180209 G96  0.9+  0.1+    200214 L01  0.1-  0.1+    200215 104  0.2+  0.5-
    180209 I52  1.5-  0.6-    200214 L01  0.4-  0.0     200215 C95  0.3+  0.2-
    180209 I52  1.1-  0.2-    200214 L01  0.3+  0.4-    200215 W34  0.4-  0.1+
    180209 I52  1.6-  0.1-    200214 L01  0.0   0.4-    200215 W34  0.8-  0.4-
    180209 I52  1.0-  0.5-    200214 L01  0.1+  0.2-    200215 V01  0.2+  0.3-
    180209 L01  0.6+  0.2+    200214 L01  0.2-  0.2-    200215 C95  0.1-  0.2-
    180209 L01  0.3-  0.3+    200214 L01  0.1+  0.4-    200215 W34  0.9-  0.3-
    180209 L01  0.2+  0.3-    200214 I93  0.1+  0.2-    200215 W34  1.0-  0.3-
    180210 J95  0.3+  0.1+    200214 I93  0.0   0.2-    200215 V01  0.1-  0.5+
    180210 J95  0.3+  0.2-    200214 C77  0.8-  0.2+    200215 W34  0.4-  0.1+
    180210 J95  0.7+  0.5-    200214 I93  0.1+  0.2-    200215 C95  0.1-  0.1-
    180210 I52  0.6-  0.1+    200214 C77  0.5+  0.1-    200215 850  0.0   1.6+
    180210 I52  1.6-  0.2-    200214 C77  0.3-  0.5+    200215 V01  0.3-  0.1-
    180210 I52  1.0-  0.6+    200214 203  0.1-  0.3-    200215 850  1.0-  0.2+
    180210 587  1.1+  1.6+    200214 958  0.4-  0.2+    200215 V01  0.1+  0.1+
    180210 587  0.2+  1.3+    200214 203  0.0   0.4-    200215 H21  0.0   0.4-
    180210 587  0.8+  0.8+    200214 958  0.1-  0.5-    200215 H21  0.2+  0.3-
    180210 104  0.4-  0.2+    200214 958  0.1+  0.2-    200215 H21  0.3+  0.3-
    180210 104  0.0   0.7-    200214 958  0.6-  0.5-    200215 I52  0.2+  0.5-
    180210 204  0.1+  0.1-    200214 203  0.1+  0.6-    200215 H21  0.2+  0.5-
    180210 204  0.1+  0.2-    200214 204  0.2-  0.2-    200215 I52  0.4+  0.9-
    180211 204  0.2-  0.1+    200214 K63  0.0   0.4+    200215 I52  0.4+  0.5-
    180211 I52  2.0-  0.3+    200214 K63  1.4-  1.0+    200215 I52  0.2+  0.4-
    180211 I52  2.7-  0.3+    200214 204  0.2-  0.3-    200215 H21  0.2+  0.3-
    180211 I52  1.1-  0.5+    200214 K63  1.0-  0.3+    200215 I41  0.3+  1.0+
    180211 J95  0.5+  0.4+    200214 595  0.1-  0.3-    200215 I41  0.9-  1.1+
    180211 J95  0.4+  0.2+    200214 204  0.3-  0.1-    200215 I41  1.1+  0.9+
    180211 J95  0.2-  0.1-    200214 595  0.2+  0.5-    200215 I41  0.7-  0.7+
    200214 I41  0.9+  0.0     200214 595  0.1-  0.1+    200215 I41  1.5+  0.4+
    200214 I41  0.6-  0.0     200214 595  0.0   0.3-    200215 I41  1.0+  0.2-
    200214 I41  1.3+  0.2-    200214 160  0.6-  0.1-    200215 I41  0.9+  0.5+
    200214 I41  0.9+  0.2-    200214 160  0.1-  0.2+    200215 I41  0.9+  0.2+
    200214 I41  0.6+  0.6+    200214 160  0.1-  0.2-    200215 K61  0.3+  0.5+
    200214 I41  0.1+  0.3+    200214 160  0.3-  0.5-    200215 K61  0.1+  0.6+
    200214 I41  0.4+  1.1+    200214 160  0.3-  0.0     200215 K61  0.4-  0.2+
    
    Ephemeris:
    2018 CW2                 a,e,i = 0.76, 0.42, 5                   q = 0.4413
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 01 16    12 21 00.3 +11 34 12   0.1973  1.0797   114.2    56.2    24.5
    ...
    2020 01 31    12 21 55.8 +13 52 22   0.1070  1.0560   129.2    46.2    22.8
    ...
    2020 02 08    12 06 00.2 +18 51 29   0.05990 1.0335   141.0    36.9    21.3
    ...
    2020 02 14    11 00 22.8 +32 56 29   0.02732 1.0120   154.3    25.1    19.2
    2020 02 15    10 25 39.8 +38 11 21   0.02282 1.0080   153.7    25.7    18.8
    2020 02 16    09 26 56.0 +44 21 23   0.01911 1.0039   147.8    31.7    18.6
    ...
    2020 02 22    02 18 46.9 +17 12 49   0.02980 0.9771    65.6   112.8    22.5
    ...
    2020 03 01    01 22 09.4 +01 54 47   0.07384 0.9351    39.5   137.6    26.5
    ...
    2020 03 16    00 54 01.2 -03 43 44   0.1670  0.8371    17.6   158.9    32.1
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-C139
    


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