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  • MPEC 2015-G73 : 2008 HC2

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    M.P.E.C. 2015-G73                                Issued 2015 Apr. 15, 15:17 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
    
                                       2008 HC2
    
                               Revision to MPEC 2008-H41
    
    Additional Observations:
         K08H02C  C2015 03 22.55846 15 59 41.984-24 49 32.68         21.7 wLEG073F51
         K08H02C  C2015 03 22.56908 15 59 42.299-24 49 17.42         21.6 wLEG073F51
         K08H02C  C2015 03 22.59028 15 59 42.952-24 48 46.83         21.3 wLEG073F51
         K08H02C  C2015 03 22.59341 15 59 43.055-24 48 41.75         21.6 wLEG073F51
         K08H02C  C2015 03 22.60412 15 59 43.350-24 48 26.40         21.5 wLEG073F51
         K08H02C  C2015 03 22.61486 15 59 43.705-24 48 10.70         21.4 wLEG073F51
         K08H02C  C2015 03 22.62555 15 59 44.028-24 47 54.77         21.7 wLEG073F51
         K08H02C  C2015 04 14.40830 16 00 07.39 -08 35 21.6          20.1 RoEG073926
         K08H02C  C2015 04 14.41574 16 00 07.06 -08 34 51.3          20.1 RoEG073926
         K08H02C  C2015 04 14.42319 16 00 06.66 -08 34 20.6          20.1 RoEG073926
         K08H02C  C2015 04 15.40331 15 59 23.12 -07 25 59.5          20.1 RoEG073926
         K08H02C  C2015 04 15.41142 15 59 22.71 -07 25 24.9          20.3 RoEG073926
         K08H02C  C2015 04 15.41808 15 59 22.34 -07 24 56.3          20.0 RoEG073926
    
    Observer details:
    926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
        M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers B. Gibson, T. Goggia, N. Primak,
        A. Schultz, M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau,
        H. Flewelling, M. Huber, E. Magnier, E. Schunova, R. Wainscoat, C. Waters,
        R. Weryk.  1.8-m 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
    150322 F51 0.04+ 0.02+    150415 926 0.07+ 0.04+    MPO140215   -0.058 day
    
    Orbital elements:
    2008 HC2                                                 Earth MOID = 0.3401 AU
    Epoch 2015 June 27.0 TT = JDT 2457200.5                 MPC
    M 330.70873              (2000.0)            P               Q
    n   0.71066147     Peri.  142.99374     +0.90102802     +0.21644297
    a   1.2436386      Node   211.80886     -0.11353941     +0.95407870
    e   0.5225343      Incl.   45.49303     +0.41863745     -0.20709003
    P   1.39           H   19.7           G   0.15           U   4
    Residuals in seconds of arc
    080427 G96  0.4-  0.1-    080503 291  0.3-  0.4+    150322 F51  0.2+  0.1+
    080427 G96  0.1-  0.6-    080503 291  0.0   0.2+    150322 F51  0.0   0.0
    080427 G96  0.6-  0.2+    080505 H55  0.5+  0.3+    150322 F51  0.1+  0.2-
    080427 G96  0.0   0.3-    080505 H55  0.0   0.2+    150322 F51  0.2+  0.3+
    080427 G96  0.1-  0.5-    080505 H55  0.0   0.1-    150322 F51  0.3-  0.0
    080427 G96  0.3-  0.5-    080513 H55  0.4+  0.1-    150322 F51  0.1+  0.0
    080427 G96  0.0   0.1+    080513 H55  1.1+  0.2+    150322 F51  0.1+  0.3+
    080427 G96  0.2-  0.2-    080513 H55  0.2-  0.3-    150414 926  0.3-  0.1-
    080428 G96  0.0   0.2+    080521 H55  0.2-  0.3+    150414 926  0.1+  0.3-
    080428 G96  0.1+  0.1-    080521 H55  1.1-  0.4+    150414 926  0.5-  0.1-
    080428 734 (1.7-  1.3+)   080521 H55  0.4-  0.1-    150415 926  0.2-  0.3-
    080428 734 (2.2-  0.4-)   080529 H55  0.9+  0.2+    150415 926  0.1+  0.3-
    080428 734 (2.3-  0.6+)   080529 H55  0.9+  0.1-    150415 926  0.2-  0.2-
    080503 291  0.2+  0.6-    080529 H55  0.2-  0.8+
    
    Ephemeris:
    2008 HC2                 a,e,i = 1.24, 0.52, 45                  q = 0.5938
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2015 03 16    15 55 04.9 -27 06 59   0.9677  1.6306   112.4    34.3    22.1
    ...
    2015 03 31    16 03 07.3 -20 39 51   0.7295  1.5508   126.9    31.0    21.3
    ...
    2015 04 08    16 03 05.3 -14 56 03   0.6151  1.5036   135.6    27.7    20.8
    ...
    2015 04 14    16 00 24.2 -09 02 51   0.5387  1.4660   142.2    24.8    20.3
    2015 04 15    15 59 41.7 -07 54 20   0.5270  1.4596   143.2    24.3    20.3
    2015 04 16    15 58 54.2 -06 42 50   0.5157  1.4531   144.1    23.9    20.2
    ...
    2015 04 22    15 52 18.4 +01 32 37   0.4554  1.4129   148.3    21.9    19.8
    ...
    2015 04 30    15 37 48.9 +15 24 53   0.4013  1.3564   145.3    25.0    19.5
    ...
    2015 05 15    14 48 21.7 +43 44 12   0.3952  1.2413   117.0    46.5    19.9
    
    A. U. Tomatic                (C) Copyright 2015 MPC           M.P.E.C. 2015-G73
    

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