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    • MPEC 2004-F21 : 2004 ET21

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    M.P.E.C. 2004-F21                                Issued 2004 Mar. 17, 13:53 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 Steven and Michele Kirsch Foundation
             Prepared using the Tamkin Foundation Computer Network

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

                                   2004 ET21

Observations:
     K04E21T* C2004 03 15.38336 11 39 42.83 +08 26 10.4          22.4 V EF021691
     K04E21T  C2004 03 15.41090 11 39 40.44 +08 27 32.9          22.0 V EF021691
     K04E21T  C2004 03 15.45823 11 39 36.36 +08 29 56.7          22.1 V EF021691
     K04E21T  C2004 03 16.33206 11 38 24.54 +09 13 43.0          21.7 V EF021291
     K04E21T  C2004 03 16.33617 11 38 24.19 +09 13 55.0          21.7 V EF021291
     K04E21T  C2004 03 16.34118 11 38 23.74 +09 14 10.0          22.0 V EF021291
     K04E21T  C2004 03 16.94765 11 37 34.27 +09 44 05.0                 EF021246
     K04E21T  C2004 03 16.94847 11 37 34.22 +09 44 08.2                 EF021246
     K04E21T  C2004 03 16.95034 11 37 33.95 +09 44 11.9                 EF021246
     K04E21T  C2004 03 16.95111 11 37 33.83 +09 44 15.8                 EF021246
     K04E21T  C2004 03 17.38336 11 36 58.33 +10 05 25.5          22.1 V EF021291
     K04E21T  C2004 03 17.38847 11 36 57.92 +10 05 40.8          21.8 V EF021291
     K04E21T  C2004 03 17.39236 11 36 57.58 +10 05 52.5          21.8 V EF021291

Observer details:
246 Klet Observatory-KLENOT.  Observer M. Tichy.  1.06-m KLENOT Telescope
    + CCD.
291 LPL/Spacewatch II.  Observer J. V. Scotti.  1.8-m f/2.7 reflector + CCD.
691 Steward Observatory, Kitt Peak.  Observer A. E. Gleason.  0.9-m f/3
    reflector + CCD.

Orbital elements:
2004 ET21
Epoch 2004 Mar. 16.0 TT = JDT 2453080.5                 MPC
M  77.99310              (2000.0)            P               Q
n   0.46914297     Peri.  248.60471     +0.46752937     -0.87798576
a   1.6403351      Node   171.12784     +0.82457261     +0.47504532
e   0.3271386      Incl.   41.77467     -0.31858483     -0.05893178
P   2.10           H   21.1           G   0.15
From 13 observations 2004 Mar. 15-17.

Ephemeris:
2004 ET21                a,e,i = 1.64, 0.33, 42                  q = 1.1037
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2004 03 16    11 38.87   +08 57.2    0.711    1.702   172.6     4.3    21.9
2004 03 26    11 26.24   +16 24.4    0.781    1.743   157.0    12.9    22.5
2004 04 05    11 17.01   +21 53.5    0.881    1.783   142.8    19.8    23.1

Timothy B. Spahr             (C) Copyright 2004 MPC           M.P.E.C. 2004-F21

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