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Minor Planet Center

MPEC 2005-O36 : 2003 EL61

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M.P.E.C. 2005-O36                                Issued 2005 July 29, 00:27 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.

                  Supported in part by the Brinson Foundation
             Prepared using the Tamkin Foundation Computer Network

                              MPC@CFA.HARVARD.EDU
          URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714

                                   2003 EL61

Observations:
     K03E61L . 1955 03 22.22223 10 09 55.63 +24 51 39.6                 EO036261
     K03E61L . 1955 03 22.24930 10 09 55.53 +24 51 39.8                 EO036261
     K03E61L . 1991 01 25.50313 12 36 51.42 +22 32 53.2                 EO036261
     K03E61L . 1991 04 15.27118 12 32 29.24 +23 14 36.3                 EO036261
     K03E61L . 1994 03 09.36320 12 46 18.16 +22 29 07.1                 EO036261
     K03E61L . 1995 02 04.42292 12 51 37.24 +21 57 31.0                 EO036261
     K03E61L . 1996 05 13.25972 12 49 45.05 +22 26 30.3                 EO036261
     K03E61L  C1998 04 24.36539 12 58 20.67 +22 03 00.3          17.4 R EO036566
     K03E61L  C1998 04 24.38611 12 58 20.59 +22 03 00.5          17.4 R EO036566
     K03E61L  C1998 04 24.40744 12 58 20.51 +22 03 01.0          17.5 R EO036566
     K03E61L  C1999 02 19.66603 13 05 57.56 +21 21 08.3          17.7 R EO036566
     K03E61L  C2002 04 10.27434 13 14 10.70 +21 09 59.3          17.1 R EO036644
     K03E61L  C2002 04 10.29606 13 14 10.61 +21 09 59.9          17.3 R EO036644
     K03E61L  C2002 04 10.31712 13 14 10.53 +21 10 00.2          17.4 R EO036644
     K03E61L  C2002 04 21.27490 13 13 26.65 +21 13 17.4          17.2 R EO036644
     K03E61L  C2002 04 21.29557 13 13 26.56 +21 13 18.0          17.4 R EO036644
     K03E61L  C2002 04 21.31654 13 13 26.48 +21 13 18.2          17.5 R EO036644
     K03E61L  C2002 05 04.24632 13 12 37.32 +21 15 31.3          17.2 R EO036644
     K03E61L  C2002 05 04.24861 13 12 37.31 +21 15 31.5          17.1 R EO036644
     K03E61L  C2002 05 04.25674 13 12 37.27 +21 15 31.5          17.1 R EO036644
     K03E61L  C2002 05 04.25910 13 12 37.25 +21 15 31.6          17.1 R EO036644
     K03E61L  C2002 05 04.26712 13 12 37.25 +21 15 31.6          17.3 R EO036644
     K03E61L  C2002 05 04.26943 13 12 37.24 +21 15 31.7          17.2 R EO036644
     K03E61L  C2002 05 14.25532 13 12 02.88 +21 15 55.1          17.5 R EO036644
     K03E61L  C2002 05 14.27612 13 12 02.82 +21 15 55.1          17.3 R EO036644
     K03E61L  C2002 05 14.29705 13 12 02.74 +21 15 55.0          17.4 R EO036644
     K03E61L* C2003 03 07.02824 13 20 02.68 +20 39 16.9          17.6 V EO036J86
     K03E61L  C2003 03 09.01612 13 19 56.32 +20 40 29.8          17.7 V EO036J86
     K03E61L  C2003 03 10.01530 13 19 53.05 +20 41 06.4          17.6 V EO036J86
     K03E61L  C2003 03 24.41292 13 19 01.67 +20 49 10.1          17.1 R EO036644
     K03E61L  C2003 03 24.43403 13 19 01.60 +20 49 10.6          17.5 R EO036644
     K03E61L  C2003 03 24.45521 13 19 01.52 +20 49 11.4          17.2 R EO036644
     K03E61L  C2003 04 05.46816 13 18 14.40 +20 54 46.2          17.0 R EO036608
     K03E61L  C2003 04 05.47924 13 18 14.35 +20 54 46.9          16.9 R EO036608
     K03E61L  C2003 04 05.49024 13 18 14.30 +20 54 46.7          17.1 R EO036608
     K03E61L  C2003 04 13.47444 13 17 42.13 +20 57 46.0          17.2 R EO036608
     K03E61L  C2003 04 13.47965 13 17 42.11 +20 57 46.3          17.1 R EO036608
     K03E61L  C2003 04 13.48486 13 17 42.09 +20 57 46.3          17.2 R EO036608
     K03E61L  C2005 07 28.84559 13 21 51.59 +20 07 20.5          17.2 R EO036620
     K03E61L  C2005 07 28.85162 13 21 51.59 +20 07 20.3                 EO036620
     K03E61L  C2005 07 28.85766 13 21 51.60 +20 07 20.2                 EO036620

Observer details:
261 Palomar-DSS.  Measurer J. L. Ortiz.
566 Haleakala-NEAT/GEODSS.  Measurer J. L. Ortiz.
608 Haleakala-NEAT/MSSS.  Observers R. Bambery, E. Helin, S. Pravdo, M. Hicks,
    K. Lawrence, P. Kervin.  Measurers J. L. Ortiz, R. Matson.  1.2-m
    reflector + CCD.
620 Observatorio Astronomico de Mallorca.  Observers S. Sanchez, R. Stoss,
    J. Nomen.  0.30-m f/9 Schmidt-Cassegrain + CCD.
644 Palomar Mountain/NEAT.  Measurer J. L. Ortiz.
J86 Sierra Nevada Observatory.  Observer F. J. Aceituno.  Measurers
    P. Santos-Sanz, J. L. Ortiz.  0.36-m f/6 Schmidt-Cassegrain + CCD.

Orbital elements:
2003 EL61
Epoch 2005 Aug. 18.0 TT = JDT 2453600.5                 MPC
M 198.07463              (2000.0)            P               Q
n   0.00345449     Peri.  239.51228     +0.91288830     -0.07567035
a  43.3391124      Node   121.89507     +0.13492043     +0.98337369
e   0.1888463      Incl.   28.19471     -0.38526800     +0.16507631
P 285              H    0.4           G   0.15           U   3
Residuals in seconds of arc
550322 261  0.0   0.1+    020421 644  0.0   0.8-    030310 J86  0.1-  0.3+
550322 261  0.0   0.1-    020421 644  0.1-  0.5-    030324 644  0.0   0.1+
910125 261  0.2+  0.3-    020421 644  0.0   0.6-    030324 644  0.1+  0.0
910415 261  0.2+  0.0     020504 644  0.0   0.1+    030324 644  0.2+  0.1+
940309 261  0.1+  0.1-    020504 644  0.1-  0.3+    030405 608  0.4+  0.1-
950204 261  0.6-  1.0+    020504 644  0.2-  0.2+    030405 608  0.3+  0.3+
960513 261  0.1-  0.0     020504 644  0.4-  0.3+    030405 608  0.2+  0.2-
980424 566  0.1-  0.3-    020504 644  0.1+  0.2+    030413 608  0.0   0.2-
980424 566  0.0   0.3-    020504 644  0.0   0.3+    030413 608  0.0   0.0
980424 566  0.0   0.0     020514 644  0.1+  0.1+    030413 608  0.0   0.1-
990219 566  0.1+  0.4-    020514 644  0.2+  0.1+    050728 620  0.0   0.0
020410 644  0.1-  0.2+    020514 644  0.1+  0.0     050728 620  0.2-  0.0
020410 644  0.1-  0.3+    030307 J86  0.1-  0.3-    050728 620  0.2-  0.2+
020410 644  0.0   0.2+    030309 J86  0.1-  0.2-

Ephemeris:
2003 EL61                a,e,i = 43.34, 0.19, 28                 q = 35.155
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2005 07 29    13 21.86   +20 07.2   51.618   51.238    67.5     1.0    17.7
2005 08 08    13 22.20   +20 00.6   51.748   51.237    59.3     1.0    17.7
2005 08 18    13 22.66   +19 53.7   51.862   51.236    51.3     0.9    17.7
2005 08 28    13 23.21   +19 46.8   51.959   51.235    43.8     0.8    17.7
2005 09 07    13 23.86   +19 40.1   52.036   51.234    36.9     0.7    17.6
2005 09 17    13 24.58   +19 33.8   52.090   51.233    31.1     0.6    17.6
2005 09 27    13 25.36   +19 27.9   52.120   51.232    27.3     0.5    17.6
2005 10 07    13 26.18   +19 22.7   52.125   51.231    26.3     0.5    17.6
2005 10 17    13 27.02   +19 18.3   52.103   51.229    28.5     0.5    17.6
2005 10 27    13 27.87   +19 14.8   52.056   51.228    33.3     0.6    17.6
2005 11 06    13 28.69   +19 12.3   51.985   51.227    39.8     0.7    17.7
2005 11 16    13 29.47   +19 10.9   51.891   51.226    47.3     0.8    17.7
2005 11 26    13 30.18   +19 10.7   51.778   51.225    55.5     0.9    17.7
2005 12 06    13 30.82   +19 11.6   51.647   51.224    64.1     1.0    17.7
2005 12 16    13 31.36   +19 13.6   51.504   51.223    72.9     1.1    17.7
2005 12 26    13 31.79   +19 16.7   51.352   51.222    81.9     1.1    17.7
2006 01 05    13 32.09   +19 20.7   51.195   51.220    90.9     1.1    17.7
2006 01 15    13 32.26   +19 25.7   51.040   51.219   100.0     1.1    17.6
2006 01 25    13 32.30   +19 31.3   50.889   51.218   109.0     1.0    17.6
2006 02 04    13 32.21   +19 37.4   50.749   51.217   117.9     1.0    17.6
2006 02 14    13 31.98   +19 43.8   50.623   51.216   126.4     0.9    17.6
2006 02 24    13 31.64   +19 50.3   50.515   51.215   134.6     0.8    17.6
2006 03 06    13 31.20   +19 56.7   50.429   51.214   141.9     0.7    17.6
2006 03 16    13 30.66   +20 02.8   50.367   51.212   147.9     0.6    17.6
2006 03 26    13 30.06   +20 08.2   50.330   51.211   151.8     0.5    17.6
2006 04 05    13 29.41   +20 13.0   50.320   51.210   152.6     0.5    17.6
2006 04 15    13 28.74   +20 16.9   50.337   51.209   150.1     0.6    17.6
2006 04 25    13 28.08   +20 19.7   50.379   51.208   145.1     0.6    17.6
2006 05 05    13 27.43   +20 21.4   50.446   51.207   138.6     0.7    17.6
2006 05 15    13 26.84   +20 22.0   50.535   51.205   131.1     0.9    17.6
2006 05 25    13 26.31   +20 21.5   50.643   51.204   123.2     0.9    17.6
2006 06 04    13 25.87   +20 19.8   50.767   51.203   114.9     1.0    17.6
2006 06 14    13 25.54   +20 17.0   50.903   51.202   106.6     1.1    17.6
2006 06 24    13 25.31   +20 13.2   51.048   51.201    98.1     1.1    17.7
2006 07 04    13 25.20   +20 08.6   51.197   51.199    89.6     1.1    17.7
2006 07 14    13 25.22   +20 03.1   51.345   51.198    81.1     1.1    17.7
2006 07 24    13 25.36   +19 57.1   51.489   51.197    72.7     1.1    17.7
2006 08 03    13 25.62   +19 50.6   51.625   51.196    64.4     1.0    17.7

Gareth V. Williams           (C) Copyright 2005 MPC           M.P.E.C. 2005-O36

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