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Minor Planet Center

MPEC 2010-H38 : 2010 HG20

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M.P.E.C. 2010-H38                                Issued 2010 Apr. 21, 22:02 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.minorplanetcenter.org/iau/mpc.html  ISSN 1523-6714

                                   2010 HG20

Observations:
     K10H20G* C2010 04 20.44854 16 44 55.89 -02 14 49.9          20.3 V EH038G96
     K10H20G  C2010 04 20.45336 16 44 55.03 -02 15 00.1          20.0 V EH038G96
     K10H20G  C2010 04 20.45819 16 44 54.16 -02 15 10.6          20.5 V EH038G96
     K10H20G  C2010 04 20.46304 16 44 53.34 -02 15 21.2          20.3 V EH038G96
     K10H20G  C2010 04 20.49251 16 44 48.16 -02 16 23.9          21.0 V EH038G96
     K10H20G  C2010 04 20.49311 16 44 48.06 -02 16 25.1          20.1 V EH038G96
     K10H20G  C2010 04 20.49371 16 44 47.96 -02 16 26.5          20.7 V EH038G96
     K10H20G  C2010 04 20.49431 16 44 47.84 -02 16 27.5          20.7 V EH038G96
     K10H20G  C2010 04 20.97291 16 43 29.14 -02 33 40.8          19.9 R EH038473
     K10H20G  C2010 04 20.97847 16 43 28.13 -02 33 53.5          19.9 R EH038473
     K10H20G KC2010 04 21.39078916 42 17.17 -02 48 42.3          20.4 V EH038H21
     K10H20G KC2010 04 21.39594316 42 16.22 -02 48 53.1          21.0 V EH038H21
     K10H20G KC2010 04 21.40128316 42 15.19 -02 49 05.5          20.3 V EH038H21
     K10H20G  C2010 04 21.48219 16 42 01.02 -02 51 58.9          20.1 R EH038H01
     K10H20G  C2010 04 21.48990 16 41 59.65 -02 52 15.2          19.9 R EH038H01
     K10H20G KC2010 04 21.49434 16 41 58.83 -02 52 25.5          19.9 R EH038H01

Observer details:
473 Remanzacco.  Observers L. Donato, V. Gonano, E. Guido, G. Sostero.  0.45-m
    f/4.4 Newtonian reflector + CCD.
G96 Mt. Lemmon Survey.  Observer A. Boattini.  Measurers J. D. Ahern,
    E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer,
    R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught.  1.5-m reflector
    + CCD.
H01 Magdalena Ridge Observatory, Socorro.  Observer W. H. Ryan.  2.4-m f/8.9
    reflector + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers H. Devore, R. Holmes.  0.61-m f/4.5 astrograph + CCD.

Orbital elements:
2010 HG20                                           PHA, Earth MOID = 0.0129 AU
Epoch 2010 July 23.0 TT = JDT 2455400.5                 MPC
M 138.18790              (2000.0)            P               Q
n   0.69758522     Peri.   57.74558     -0.34477670     -0.90427013
a   1.2591318      Node    54.49818     +0.72303792     -0.42692970
e   0.2861722      Incl.   18.02017     +0.59861941     -0.00515338
P   1.41           H   21.0           G   0.15           U   9
Residuals in seconds of arc
100420 G96  0.2+  0.0     100420 G96  0.1+  0.0     100421 H21  0.1-  0.2-
100420 G96  0.0   0.1+    100420 G96  0.1-  0.3+    100421 H01  0.6-  0.2-
100420 G96  0.3-  0.1-    100420 473  0.1-  0.2+    100421 H01  0.3-  0.2+
100420 G96  0.2+  0.3-    100420 473  0.6-  0.5-    100421 H01  0.6-  0.4-
100420 G96  0.0   0.0     100421 H21  1.3+  0.2+
100420 G96  0.0   0.1+    100421 H21  0.9+  0.6+

Ephemeris:
2010 HG20                a,e,i = 1.26, 0.29, 18                  q = 0.8988
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2010 04 14    17 00.79   +01 23.5    0.330    1.226   126.0    41.4    20.7
2010 04 24    16 34.56   -04 24.2    0.316    1.270   142.2    29.0    20.3
2010 05 04    16 00.61   -10 45.3    0.319    1.313   160.5    14.8    19.9
2010 05 14    15 24.46   -16 37.9    0.343    1.353   178.0     1.5    19.5
2010 05 24    14 53.29   -21 12.4    0.390    1.392   163.9    11.6    20.4
2010 06 03    14 31.41   -24 26.3    0.456    1.427   149.8    20.9    21.1
2010 06 13    14 19.20   -26 43.5    0.537    1.460   138.2    27.6    21.7

Sonia Keys                   (C) Copyright 2010 MPC           M.P.E.C. 2010-H38

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