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  • MPEC 2020-W112 : 2009 WY7

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    M.P.E.C. 2020-W112                            Issued 2020 November 22, 21:20 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
    
                                    2009 WY7                                 
    
    
                               Revision to MPEC 2009-W53                            
    
    Additional Observations:
         K09W07Y  C2020 11 22.04676 04 34 54.72 +17 02 53.3          18.0 RoEW112K88
         K09W07Y  C2020 11 22.04747 04 34 53.44 +17 02 52.5          18.2 RoEW112K88
         K09W07Y  C2020 11 22.04821 04 34 52.10 +17 02 51.1          18.0 RoEW112K88
         K09W07Y  C2020 11 22.06780 04 34 17.06 +17 02 18.9          17.9 RoEW112K88
         K09W07Y  C2020 11 22.06822 04 34 16.36 +17 02 18.0          17.8 RoEW112K88
         K09W07Y  C2020 11 22.06948 04 34 14.04 +17 02 15.1          18.1 RoEW112K88
         K09W07Y  C2020 11 22.08075 04 33 53.95 +17 01 56.3          18.0 RoEW112K88
         K09W07Y  C2020 11 22.08158 04 33 52.45 +17 01 54.6          18.3 RoEW112K88
         K09W07Y  C2020 11 22.08284 04 33 50.17 +17 01 53.5          18.3 RoEW112K88
         K09W07Y  C2020 11 22.08325 04 33 49.42 +17 01 51.9          18.2 RoEW112K88
         K09W07Y  C2020 11 22.08367 04 33 48.69 +17 01 51.7          18.2 RoEW112K88
         K09W07Y  C2020 11 22.08409 04 33 48.02 +17 01 50.3          18.5 RoEW112K88
         K09W07Y KC2020 11 22.09319 04 33 32.60 +17 01 43.6          18.6 GVEW112204
         K09W07Y KC2020 11 22.09758 04 33 24.73 +17 01 36.2                VEW112204
         K09W07Y KC2020 11 22.10197 04 33 16.86 +17 01 28.4                VEW112204
         K09W07Y  C2020 11 22.11798 04 32 47.49 +17 00 51.5          18.2 RoEW112K88
         K09W07Y  C2020 11 22.11844 04 32 46.68 +17 00 50.7          18.2 RoEW112K88
         K09W07Y  C2020 11 22.11890 04 32 45.78 +17 00 49.5          18.4 RoEW112K88
         K09W07Y  C2020 11 22.11937 04 32 44.97 +17 00 48.6          18.5 RoEW112K88
         K09W07Y  C2020 11 22.11983 04 32 44.20 +17 00 47.7          18.5 RoEW112K88
         K09W07Y  C2020 11 22.12029 04 32 43.29 +17 00 46.3          18.5 RoEW112K88
         K09W07Y  C2020 11 22.12168 04 32 40.85 +17 00 44.4          18.7 RoEW112K88
         K09W07Y KC2020 11 22.14944 04 32 03.60 +17 00 38.9          18.5 GVEW112W34
         K09W07Y KC2020 11 22.15987 04 31 44.70 +17 00 23.0          17.6 GVEW112W34
         K09W07Y KC2020 11 22.16927 04 31 27.67 +17 00 08.5          18.1 GVEW112W34
         K09W07Y KC2020 11 22.17586604 31 19.50 +16 59 52.8          18.23GVEW112I52
         K09W07Y KC2020 11 22.17635904 31 18.61 +16 59 52.3          17.98GVEW112I52
         K09W07Y KC2020 11 22.17685204 31 17.72 +16 59 51.4          18.16GVEW112I52
         K09W07Y KC2020 11 22.21409 04 30 09.87 +16 58 34.5          19.0 GVEW112V01
         K09W07Y KC2020 11 22.28382 04 28 02.90 +16 56 38.8          18.2 GVEW112V01
         K09W07Y  C2020 11 22.38925 04 24 49.04 +16 53 21.1          18.3  rEW112718
         K09W07Y  C2020 11 22.39023 04 24 47.34 +16 53 18.8          18.5  rEW112718
         K09W07Y  C2020 11 22.39119 04 24 45.56 +16 53 16.6          18.0  rEW112718
         K09W07Y  C2020 11 22.39216 04 24 43.80 +16 53 15.7          18.2  rEW112718
         K09W07Y hC2020 11 22.77216904 13 26.25 +16 39 15.7          18.7 GVEW112L01
         K09W07Y hC2020 11 22.77276804 13 25.14 +16 39 14.5          18.0 GVEW112L01
         K09W07Y hC2020 11 22.77336304 13 24.05 +16 39 13.2          18.2 GVEW112L01
         K09W07Y hC2020 11 22.77396204 13 22.94 +16 39 11.8          18.4 GVEW112L01
         K09W07Y hC2020 11 22.77456004 13 21.83 +16 39 10.6          18.2 GVEW112L01
         K09W07Y hC2020 11 22.77575204 13 19.62 +16 39 08.3          18.3 GVEW112L01
         K09W07Y KC2020 11 22.78580 04 13 00.67 +16 38 26.4          17.8 GVEW112970
         K09W07Y KC2020 11 22.78919 04 12 54.39 +16 38 18.8          17.5 GVEW112970
         K09W07Y KC2020 11 22.80932 04 12 17.74 +16 38 04.1          17.5 RUEW112470
         K09W07Y  C2020 11 22.81077 04 12 13.74 +16 37 48.2          17.8 RoEW112K88
         K09W07Y KC2020 11 22.81096 04 12 14.65 +16 38 00.5          17.8 RUEW112470
         K09W07Y  C2020 11 22.81130 04 12 12.71 +16 37 47.9          18.1 RoEW112K88
         K09W07Y  C2020 11 22.81290 04 12 09.81 +16 37 44.2          18.0 RoEW112K88
         K09W07Y KC2020 11 22.81443904 12 07.83 +16 37 23.1          18.3 GVEW112J95
         K09W07Y KC2020 11 22.81646804 12 04.09 +16 37 19.0          18.2 GVEW112J95
         K09W07Y KC2020 11 22.81851104 12 00.29 +16 37 14.2          18.4 GVEW112J95
         K09W07Y KC2020 11 22.83140604 11 35.96 +16 36 42.0          18.5 GVEW112Z99
         K09W07Y KC2020 11 22.83367304 11 31.75 +16 36 37.1          18.4 GVEW112Z99
         K09W07Y KC2020 11 22.83593804 11 27.54 +16 36 31.6          18.4 GVEW112Z99
         K09W07Y KC2020 11 22.83713504 11 26.68 +16 36 56.9          18.4 GVEW112B49
         K09W07Y KC2020 11 22.83818904 11 24.71 +16 36 54.2          18.5 GVEW112B49
         K09W07Y KC2020 11 22.83820004 11 23.34 +16 36 27.0          18.5 GVEW112Z99
         K09W07Y KC2020 11 22.84035904 11 20.68 +16 36 49.0          18.6 GVEW112B49
         K09W07Y KC2020 11 22.84134 04 11 17.77 +16 36 44.8          18.0 GVEW112L39
         K09W07Y KC2020 11 22.84357604 11 14.60 +16 36 42.1          18.6 GVEW112B49
         K09W07Y KC2020 11 22.84385 04 11 13.02 +16 36 40.7          19.3 GVEW112L39
         K09W07Y KC2020 11 22.84636 04 11 08.31 +16 36 34.9          18.2 GVEW112L39
         K09W07Y KC2020 11 22.84930 04 11 02.34 +16 36 23.6          18.3 GVEW112595
         K09W07Y KC2020 11 22.85152 04 10 58.98 +16 36 19.8          17.8 GVEW112C77
         K09W07Y KC2020 11 22.85173 04 10 57.80 +16 36 17.6          18.2 GVEW112595
         K09W07Y KC2020 11 22.85394 04 10 54.41 +16 36 14.2          18.5 GVEW112C77
         K09W07Y KC2020 11 22.85416 04 10 53.19 +16 36 12.8          18.6 GVEW112595
         K09W07Y KC2020 11 22.86000 04 10 43.02 +16 36 00.3          18.0 GVEW112C77
    
    Observer details:
    204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector +
        CCD.
    470 Ceccano.  Observer G. Masi.  0.43-m f/6.8 astrograph + CCD.
    595 Farra d'Isonzo.  Observer E. Pettarin.  0.40-m f/5.15 reflector + CCD.
    718 Tooele.  Observer P. Wiggins.  0.35-m f/5.5 Schmidt-Cassegrain + CCD.
    970 Chelmsford.  Observer N. James.  0.28-m f/10.0 Schmidt-Cassegrain + CCD.
    B49 Paus Observatory, Sabadell.  Observer J. Camarasa.  0.30-m f/4 reflector +
        CCD.
    C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4.0 reflector + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer H. Groeller.  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.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.41-m f/6.3 Schmidt-Cassegrain
        + CCD.
    K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
    L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
        + CCD.
    L39 Osservatorio Spica, Signa.  Observers M. Bertini, L. Franchini.  0.30-m
        Newtonian reflector + CCD.
    V01 Mountainville Observatory, Alpine.  Observer B. Sheets.  0.36-m reflector
        + CCD.
    W34 Squirrel Valley Observatory, Columbus.  Observer R. L. Flynn.  0.36-m
        Schmidt-Cassegrain + CCD.
    Z99 Clixby Observatory, Cleethorpes.  Observer A. Mickleburgh.  0.36-m f/8
        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
    201122 K88   52+   18+    201122 C77   49+   18+    MPO167786   +6.85 days
    
    Orbital elements:
    2009 WY7                                                 Earth MOID = 0.0099 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 239.98716              (2000.0)            P               Q
    n   1.88202078     Peri.  172.31859     -0.55308550     +0.83074016
    a   0.6497103      Node    64.08216     -0.76805190     -0.47913510
    e   0.6088772      Incl.    4.01566     -0.32278896     -0.28337314
    P   0.52           H   24.2           G   0.15           U   4
    Residuals in seconds of arc
    091119 704  0.8+  0.7+    091122 932  0.1+  0.4-    201122 718  1.5-  0.1+
    091119 704  0.4+  1.8+    091122 932  0.1+  0.0     201122 718  0.0   0.2-
    091119 704  0.5+  0.6+    091122 932  0.6+  0.1+    201122 718  0.1-  0.5-
    091119 704  0.9+  0.6+    091124 926  0.8-  0.0     201122 718  0.2+  0.6+
    091120 704  0.5+  0.5+    091124 926  0.4-  0.2-    201122 L01  0.1-  0.1-
    091120 704  0.8+  1.7+    091124 926  0.5-  0.1-    201122 L01  0.1-  0.1-
    091120 704  0.7+  0.6+    091206 H21  0.7-  0.5+    201122 L01  0.0   0.1-
    091120 704  0.0   0.7+    091206 H21  1.3+  0.4+    201122 L01  0.0   0.2-
    091120 704  0.1+  1.0+    091206 H21  0.6-  0.1+    201122 L01  0.0   0.1-
    091120 704  0.1+  0.3+    201122 K88  0.3+  0.3-    201122 L01  0.1-  0.1+
    091120 704  1.0+  0.7+    201122 K88  0.1+  0.0     201122 970  0.3+  0.1-
    091120 704  0.6+  0.6+    201122 K88  0.1-  0.1-    201122 970  0.2-  0.4-
    091120 704  1.2+  0.5+    201122 K88  0.1-  0.4+    201122 470  0.6+  0.5+
    091120 704  0.5+  1.3+    201122 K88  0.6+  0.2+    201122 K88  0.4+  0.5-
    091120 G96  0.5+  0.4+    201122 K88  0.3-  0.5-    201122 470  0.2+  0.6+
    091120 G96  0.3+  0.3+    201122 K88  0.5+  0.1-    201122 K88  0.2-  0.4+
    091120 G96  0.3+  0.4+    201122 K88  0.3+  0.4-    201122 K88  1.1+  0.3+
    091120 G96  0.5+  0.3+    201122 K88  0.1-  0.7+    201122 J95  0.1-  0.2-
    091120 J95  0.2+  0.0     201122 K88  0.4-  0.2-    201122 J95  0.2+  0.2+
    091120 J95  0.2+  0.2+    201122 K88  0.1-  0.3+    201122 J95  0.0   0.1-
    091121 932  0.6+  0.6+    201122 K88  1.1+  0.3-    201122 Z99  0.3-  0.0
    091121 932  0.3+  0.3+    201122 204  0.3-  0.1-    201122 Z99  0.2-  0.2+
    091121 932  0.6+  0.1-    201122 204  0.3-  0.1+    201122 Z99  0.1-  0.2-
    091121 H01  0.2+  0.3+    201122 204  0.2-  0.1-    201122 B49  0.0   0.6+
    091121 H01  0.1+  0.1+    201122 K88  0.9+  0.5+    201122 B49  0.0   0.2+
    091121 H01  0.2+  0.3+    201122 K88  1.0+  0.5+    201122 Z99  0.0   0.3+
    091121 H01  0.5+  0.0     201122 K88  0.1-  0.1+    201122 B49  0.4+  0.1-
    091121 703  0.6-  0.1+    201122 K88  0.3+  0.1+    201122 L39  0.2+  1.1-
    091121 703  0.6-  0.1+    201122 K88  1.0+  0.0     201122 B49  0.6-  0.1+
    091121 703  0.4+  0.2+    201122 K88  0.3-  0.6-    201122 L39  0.4-  0.5+
    091121 703  0.1+  0.0     201122 K88  0.3+  0.0     201122 L39  0.4-  0.4+
    091121 703  0.1+  0.5+    201122 W34  0.6-  0.1-    201122 595  0.2-  0.1-
    091121 H21  0.3+  0.2+    201122 W34  0.8-  0.1-    201122 C77  0.3+  0.0
    091121 H21  0.3+  0.3+    201122 W34  0.6-  0.1-    201122 595  0.2+  0.5-
    091121 H21  0.3+  0.3+    201122 I52  0.1+  0.2-    201122 C77  0.1-  0.1-
    091121 H21  0.4+  0.2+    201122 I52  0.0   0.0     201122 595  0.5-  0.3+
    091121 204  0.0   0.3+    201122 I52  0.0   0.2-    201122 C77  0.2-  0.1-
    091121 204  0.1+  0.4+    201122 V01  0.6-  0.2+
    091121 204  0.1+  0.1+    201122 V01  0.1+  0.2-
    
    Ephemeris:
    2009 WY7                 a,e,i = 0.65, 0.61, 4                   q = 0.2541
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 10 23    08 22 33.9 +12 45 07   0.2266  1.0006    84.9    82.1    23.8
    ...
    2020 11 07    07 49 59.7 +14 13 32   0.1337  1.0398   107.8    65.1    22.2
    ...
    2020 11 15    06 53 39.0 +16 11 08   0.08492 1.0453   129.5    46.9    20.7
    ...
    2020 11 21    05 04 05.8 +17 22 17   0.05738 1.0424   161.5    17.5    19.0
    2020 11 22    04 36 21.3 +17 05 32   0.05470 1.0414   168.8    10.6    18.7
    2020 11 23    04 06 20.2 +16 31 36   0.05286 1.0402   175.3     4.4    18.3
    ...
    2020 11 29    01 15 21.3 +08 31 32   0.06093 1.0294   133.7    43.9    19.9
    ...
    2020 12 07    23 31 14.9 +00 53 48   0.1015  1.0055    98.7    75.6    21.9
    ...
    2020 12 22    22 33 08.3 -03 32 50   0.1912  0.9304    68.4   100.6    24.1
    
    A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-W112
    


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