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Minor Planet Center

MPEC 2007-Y20 : 2007 YZ

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M.P.E.C. 2007-Y20                                Issued 2007 Dec. 18, 05:26 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 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 http://www.cfa.harvard.edu/iau/mpc.html  ISSN 1523-6714

                                    2007 YZ

Observations:
     K07Y00Z* C2007 12 17.66571 07 33 05.21 +20 25 59.4          18.4 R EY020300
     K07Y00Z  C2007 12 17.66861 07 33 04.93 +20 26 09.9          18.8 R EY020300
     K07Y00Z  C2007 12 17.67151 07 33 04.77 +20 26 21.2          18.5 R EY020300
     K07Y00Z  C2007 12 17.67440 07 33 04.53 +20 26 31.4          18.8 R EY020300
     K07Y00Z  C2007 12 17.67728 07 33 04.33 +20 26 42.5          18.4 R EY020300
     K07Y00Z  C2007 12 17.68019 07 33 04.11 +20 26 53.1          18.7 R EY020300
     K07Y00Z  C2007 12 17.68308 07 33 03.80 +20 27 03.8          19.1 R EY020300
     K07Y00Z  C2007 12 17.76024 07 32 57.83 +20 31 50.7                 EY020349
     K07Y00Z  C2007 12 17.76259 07 32 57.66 +20 31 59.9                 EY020349
     K07Y00Z  C2007 12 17.76494 07 32 57.49 +20 32 08.2                 EY020349
     K07Y00Z  C2007 12 17.76729 07 32 57.29 +20 32 17.3          18.0 V EY020349
     K07Y00Z  C2007 12 17.85350 07 32 54.66 +20 37 31.1          17.5 R EY020461
     K07Y00Z  C2007 12 17.85593 07 32 54.49 +20 37 40.2                 EY020461
     K07Y00Z  C2007 12 17.85838 07 32 54.33 +20 37 49.7                 EY020461
     K07Y00Z  C2007 12 17.85846 07 32 54.41 +20 37 47.0          17.8 V EY020A17
     K07Y00Z  C2007 12 17.86366 07 32 53.96 +20 38 09.8                 EY020461
     K07Y00Z IC2007 12 17.86531 07 32 54.03 +20 38 12.9          17.7 V EY020A17
     K07Y00Z  C2007 12 17.86569 07 32 53.82 +20 38 17.9                 EY020461
     K07Y00Z  C2007 12 17.87147 07 32 53.52 +20 38 37.2          17.7 V EY020A17
     K07Y00Z  C2007 12 17.90257 07 32 51.42 +20 40 40.0          17.2 V EY020595
     K07Y00Z  C2007 12 17.91591 07 32 50.47 +20 41 30.8          17.1 V EY020595

Observer details:
300 Bisei Spaceguard Center--BATTeRS.  Observers S. Urakawa, T. Sakamoto.
    1.0-m f/3.0 reflector + CCD.
349 Ageo.  Observer K. Kadota.  0.25-m f/5.0 reflector + CCD.
461 University of Szeged, Piszkesteto Stn. (Konkoly).  Observer K. Sarneczky.
    0.60-m Schmidt + CCD.
595 Farra d'Isonzo.  Observers F. Piani, E. Pettarin.  Measurer F. Piani.
    0.40-m f/4.5 reflector + CCD.
A17 Guidestar Observatory, Weinheim.  Observers M. Emmerich, S. Melchert.
    0.36-m f/6 Schmidt-Cassegrain + CCD.

Orbital elements:
2007 YZ                                                  Earth MOID = 0.0911 AU
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5                 MPC
M 234.31015              (2000.0)            P               Q
n   0.90385677     Peri.  129.72738     -0.72359355     +0.61906912
a   1.0594236      Node    90.78201     -0.68889895     -0.62033608
e   0.4698234      Incl.   17.77376     -0.04278578     -0.48159794
P   1.09           H   20.2           G   0.15           U   9
Residuals in seconds of arc
071217 300  0.4+  0.2+    071217 349  0.1+  0.1-    071217 A17  0.3-  0.4-
071217 300  0.5-  0.1-    071217 349  0.2+  0.4+    071217 461  0.1-  0.0
071217 300  0.4+  0.3+    071217 349  0.2+  0.0     071217 A17  0.8+  0.8-
071217 300  0.0   0.3-    071217 349  0.1-  0.3+    071217 461  0.1-  0.3+
071217 300  0.3+  0.1+    071217 461  0.1-  0.2+    071217 A17  0.5-  0.2-
071217 300  0.2+  0.2-    071217 461  0.1-  0.0     071217 595  0.0   0.5+
071217 300  1.0-  0.3-    071217 461  0.0   0.1+    071217 595  0.1+  0.0

Ephemeris:
2007 YZ                  a,e,i = 1.06, 0.47, 18                  q = 0.5617
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2007 12 16    07 34.56   +18 49.9    0.239    1.199   151.1    23.4    18.6
2007 12 21    07 28.67   +24 26.6    0.193    1.165   158.4    18.1    17.9
2007 12 26    07 16.17   +33 18.0    0.152    1.130   163.5    14.3    17.2
2007 12 31    06 46.93   +47 22.5    0.119    1.092   155.7    21.7    16.8
2008 01 05    05 10.45   +66 31.4    0.0997   1.054   132.9    43.2    17.0
2008 01 10    00 00.59   +70 59.1    0.101    1.013   104.5    70.0    17.7
2008 01 15    21 45.14   +55 27.7    0.121    0.972    81.0    92.0    18.8
2008 01 20    21 06.66   +42 44.9    0.151    0.929    64.6   106.9    19.9
2008 01 25    20 49.16   +33 51.3    0.187    0.886    53.3   117.0    20.9

Sonia Keys                   (C) Copyright 2007 MPC           M.P.E.C. 2007-Y20

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