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  • MPEC 2012-F45 : 2011 HS4

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    M.P.E.C. 2012-F45                                Issued 2012 Mar. 21, 03:37 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 https://www.minorplanetcenter.net/    ISSN 1523-6714
    
                                       2011 HS4
    
                               Revision to MPEC 2011-H46
    
    Additional Observations:
         K11H04S 3C2012 03 19.63931 18 23 48.56 -15 47 26.4          23.0 rbEF045568
         K11H04S 3C2012 03 19.64459 18 23 48.70 -15 47 24.9                bEF045568
         K11H04S 3C2012 03 19.64988 18 23 48.85 -15 47 23.6                bEF045568
         K11H04S 3C2012 03 20.63622 18 24 17.23 -15 42 54.8          23.0 rbEF045568
         K11H04S 3C2012 03 20.63886 18 24 17.31 -15 42 54.1                bEF045568
         K11H04S 3C2012 03 20.64150 18 24 17.38 -15 42 53.4                bEF045568
    
    Observer details:
    568 Mauna Kea.  Observers P. Forshay, A. Draginda.  Measurer C. Veillet.
        3.6-m Canada-France-Hawaii Telescope + MegaCam.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    120319 568  5.1+ 11.5-    120320 568  6.3+ 11.5-    MPO200330   -0.022 day
    
    Orbital elements:
    2011 HS4                                            PHA, Earth MOID = 0.0061 AU
    Epoch 2012 Mar. 14.0 TT = JDT 2456000.5                 MPC
    M  78.99543              (2000.0)            P               Q
    n   1.08459261     Peri.  314.16588     +0.31019433     -0.94692471
    a   0.9381918      Node   117.58921     +0.89712669     +0.26221507
    e   0.6801094      Incl.    5.46050     +0.31455234     +0.18594852
    P   0.91           H   21.0           G   0.15           U   5
    Residuals in seconds of arc
    110426 G96  0.2-  0.4-    110429 H21  0.2-  0.0     110505 H21  0.4+  0.0
    110426 G96  0.2-  0.1-    110429 H21  0.3+  0.7+    110505 691  0.1+  0.5-
    110426 G96  0.1-  0.1-    110429 H21  0.1+  0.3-    110505 691  1.1+  0.3-
    110426 G96  0.1-  0.0     110430 H21  0.6+  0.1-    110506 A17  0.4-  0.1-
    110426 G96  0.8-  0.7+    110430 H21  0.4+  0.4-    110506 A17  0.2-  0.3+
    110426 G96  0.2-  0.1-    110430 H21  0.2+  0.2-    110506 A17  0.6+  0.0
    110426 G96  0.4+  0.7+    110430 F51  0.2-  0.1-    110510 H36  0.6-  1.0+
    110427 H36  0.7-  0.2-    110430 F51  0.0   0.2-    110510 H36  0.7+  0.9+
    110427 H36  0.6-  0.0     110430 F51  0.1+  0.1-    110510 H36 (1.8+  0.2+)
    110427 H36  0.1-  0.2+    110430 F51  0.0   0.2-    110513 204  0.3-  0.2-
    110427 H36  0.3-  1.0+    110501 807  0.0   0.2-    110513 204  0.3-  0.1+
    110427 G96  0.2+  0.0     110501 807  0.3+  0.2-    110521 807  0.0   1.3-
    110427 G96  0.4+  0.1+    110501 807  0.1+  0.2-    110521 807  0.2-  0.9-
    110427 G96  0.2-  0.1+    110501 291  0.7-  0.5+    110521 291  0.0   0.4-
    110427 G96  0.0   0.0     110501 291  0.2-  0.3-    110521 291  0.0   0.5+
    110427 926  0.6+  1.0+    110501 291  0.2-  0.1+    110521 291  0.4-  0.9+
    110427 926  0.7+  0.7+    110503 807  0.4-  0.1-    120319 568  0.1+  0.0
    110427 474 (1.7+  0.6-)   110503 807  0.6-  0.4-    120319 568  0.1+  0.1+
    110427 474  0.3-  0.9+    110503 807  0.1-  0.3-    120319 568  0.3+  0.0
    110427 474  0.6-  0.1-    110504 H21  0.5-  0.3+    120320 568  0.1-  0.1+
    110427 474  0.0   0.0     110504 H21  0.2-  0.2-    120320 568  0.2+  0.1+
    110427 474  1.2+  0.2-    110504 H21  0.5+  0.6-    120320 568  0.3+  0.1+
    110429 H21  0.4+  0.2+    110505 H21  0.5+  0.6-
    110429 H21  0.1+  0.1+    110505 H21  0.4+  0.4-
    
    Ephemeris:
    2011 HS4                 a,e,i = 0.94, 0.68, 5                   q = 0.3001
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2012 02 20    17 59 24.2 -17 42 24   0.9252  0.9711    60.9    62.8    23.0
    ...
    2012 03 06    18 14 12.8 -16 45 35   0.9196  1.1299    72.3    56.8    23.1
    ...
    2012 03 14    18 20 28.3 -16 12 17   0.8969  1.2024    78.8    54.2    23.1
    ...
    2012 03 20    18 23 58.9 -15 45 43   0.8726  1.2518    83.8    52.3    23.1
    2012 03 21    18 24 26.9 -15 41 10   0.8680  1.2596    84.7    52.0    23.1
    2012 03 22    18 24 52.6 -15 36 35   0.8633  1.2673    85.6    51.6    23.1
    ...
    2012 03 28    18 26 36.5 -15 08 24   0.8323  1.3113    91.0    49.6    23.0
    ...
    2012 04 05    18 26 18.9 -14 29 12   0.7855  1.3641    98.9    46.4    22.9
    ...
    2012 04 20    18 15 18.9 -13 11 25   0.6897  1.4459   115.9    38.7    22.5
    
    Gareth V. Williams           (C) Copyright 2012 MPC           M.P.E.C. 2012-F45
    

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