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IAU Minor Planet Center

Minor Planet Center

MPEC 2010-A75 : 2007 HB

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M.P.E.C. 2010-A75                                Issued 2010 Jan. 14, 15:39 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 HB

                           Revision to MPEC 2007-H38

Additional Observations:
     K07H00B  C2010 01 12.48264 11 20 45.36 +60 24 17.1          21.3 R EA075926
     K07H00B  C2010 01 12.48744 11 20 46.58 +60 24 25.8          21.2 R EA075926
     K07H00B  C2010 01 12.49225 11 20 47.63 +60 24 34.8          21.7 R EA075926
     K07H00B  C2010 01 14.54566 11 29 11.29 +61 25 15.8          21.1 R EA075926
     K07H00B  C2010 01 14.54977 11 29 12.18 +61 25 22.4          21.2 R EA075926
     K07H00B  C2010 01 14.55389 11 29 13.14 +61 25 30.2          21.6 R EA075926

Observer details:
926 Tenagra II Observatory.  Observers P. R. Holvorcem, M. Schwartz.  Measurer
    P. R. Holvorcem.  0.81-m f/7 Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
100112 926 0.31+ 0.20-    100114 926 0.31+ 0.21-    MPO121364   -0.24 day

Orbital elements:
2007 HB                                                  Earth MOID = 0.4488 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5                  MPC
M 336.28776              (2000.0)            P               Q
n   0.32196141     Peri.  103.74307     -0.91528421     -0.17068394
a   2.1083053      Node    67.46548     -0.04018165     -0.86258029
e   0.3979409      Incl.   23.26714     +0.40079952     -0.47625859
P   3.06           H   19.8           G   0.15           U   3
Residuals in seconds of arc
070416 G96  0.3-  0.1+    070426 448  0.3-  0.1+    070515 H45  0.6+  0.5+
070416 G96  0.3+  0.1+    070504 448  0.5-  0.5+    070515 H45  0.7+  0.4-
070416 G96  0.2-  0.0     070504 448  0.3-  0.4-    070515 H45  0.5+  0.4-
070416 G96  0.2-  0.0     070504 448  0.1+  0.0     070518 H45  0.1+  0.2-
070416 G96  0.0   0.1-    070506 A13  1.2-  0.5-    070518 H45  1.0+  0.0
070416 G96  0.0   0.0     070506 A13  0.8-  0.9-    070518 H45  0.3+  0.2-
070416 G96  0.3-  0.1-    070506 A13  1.1-  0.9-    070518 H45  0.8+  0.1-
070416 G96  0.3-  0.1+    070510 448  0.2+  0.4-    070518 H45  0.2+  0.0
070416 024  0.3+  0.5+    070510 448  0.2+  0.5+    070524 G96  0.2-  0.2-
070416 024  0.5-  0.2+    070511 703  0.6-  0.0     070524 G96  0.1-  0.2-
070416 024  0.2-  0.1+    070511 703  0.3+  0.4-    070524 G96  0.6-  0.1-
070416 246 (2.9+  0.3+)   070511 703  1.4-  0.6-    070524 G96  0.1+  0.2-
070416 246  0.8+  0.3-    070511 703  0.5-  0.4+    070605 291  0.3-  0.6+
070416 246  1.3+  0.1-    070514 H45  0.6+  0.3+    070605 291  0.2+  0.1-
070416 246  0.1+  0.6-    070514 H45  0.5+  0.1+    070605 291  0.3-  0.4-
070421 734  0.3-  0.2-    070514 H45  0.3+  1.1+    100112 926  0.6-  0.2+
070421 734  0.4-  0.2-    070514 H45  0.2+  0.3+    100112 926  0.2+  0.3+
070421 734  0.2-  0.0     070514 H45  1.1+  0.5+    100112 926  0.3-  0.6+
070421 734  0.1+  1.0+    070514 H45  0.4+  0.3-    100114 926  0.7+  0.3-
070426 448  0.1-  0.0     070515 H45  0.9+  1.3+    100114 926  0.1+  0.7-
070426 448  0.2-  0.2+    070515 H45  0.4+  0.0     100114 926  0.1-  0.0

Ephemeris:
2007 HB                  a,e,i = 2.11, 0.40, 23                  q = 1.2693
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2010 01 14    11 26.95   +61 09.2    0.588    1.404   124.6    35.2    20.8
2010 01 24    12 09.48   +65 31.5    0.567    1.367   121.2    38.0    20.8
2010 02 03    12 52.08   +68 41.0    0.557    1.336   117.3    41.0    20.8
2010 02 13    13 28.47   +70 36.2    0.551    1.310   113.7    43.7    20.8
2010 02 23    13 52.22   +71 25.3    0.546    1.289   110.9    45.8    20.8
2010 03 05    14 00.33   +71 13.9    0.540    1.276   109.3    47.2    20.8
2010 03 15    13 54.05   +69 56.4    0.532    1.270   108.8    47.8    20.7
2010 03 25    13 38.73   +67 14.4    0.522    1.271   109.6    47.7    20.7
2010 04 04    13 21.50   +62 49.4    0.512    1.279   111.4    46.7    20.6
2010 04 14    13 07.32   +56 32.7    0.506    1.294   114.1    45.0    20.6
2010 04 24    12 58.42   +48 30.4    0.507    1.316   117.0    42.9    20.6
2010 05 04    12 54.91   +39 11.1    0.522    1.344   119.4    40.8    20.6
2010 05 14    12 55.92   +29 18.8    0.553    1.377   120.6    39.2    20.8
2010 05 24    13 00.65   +19 40.9    0.603    1.414   120.0    38.3    21.0
2010 06 03    13 08.32   +10 53.5    0.672    1.455   117.9    38.0    21.3
2010 06 13    13 18.33   +03 12.6    0.759    1.500   114.6    38.0    21.6
2010 06 23    13 30.31   -03 20.8    0.860    1.546   110.7    37.9    21.9

Gareth V. Williams           (C) Copyright 2010 MPC           M.P.E.C. 2010-A75

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