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  • MPEC 1999-F12 : 1998 QK56

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    M.P.E.C. 1999-F12                                Issued 1999 Mar. 18, 16:25 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.
    
                 BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
              URL http://cfa-www.harvard.edu/iau/mpc.html  ISSN 1523-6714
    
                                       1998 QK56
    
                               Revision to MPEC 1998-R04
    
    Observations:
         J98Q56K  C1999 03 12.15530 15 05 42.91 -07 05 18.2          17.5 R      118
         J98Q56K  C1999 03 12.16218 15 05 42.68 -07 05 08.0                      118
         J98Q56K  C1999 03 12.49871 15 05 31.88 -06 56 44.0          18.8 V      691
         J98Q56K  C1999 03 12.51093 15 05 31.44 -06 56 25.9          18.8 V      691
         J98Q56K  C1999 03 12.52259 15 05 30.99 -06 56 08.4          18.4 V      691
         J98Q56K  C1999 03 12.77368 15 05 22.81 -06 49 40.3          19.0 R      422
         J98Q56K  C1999 03 12.77450 15 05 22.75 -06 49 38.7          19.0 R      422
         J98Q56K  C1999 03 13.11723 15 05 11.34 -06 41 25.8          17.9 R      046
         J98Q56K  C1999 03 13.11906 15 05 11.27 -06 41 23.5                      046
         J98Q56K  C1999 03 13.12053 15 05 11.19 -06 41 20.6                      046
         J98Q56K  C1999 03 13.12203 15 05 11.13 -06 41 18.7                      046
         J98Q56K  C1999 03 16.77101 15 02 40.18 -05 09 50.9          18.9 V      360
         J98Q56K  C1999 03 16.77604 15 02 39.92 -05 09 43.1                      360
         J98Q56K  C1999 03 16.78073 15 02 39.66 -05 09 36.3                      360
    
    Observer details:
    046 Klet.  Observers J. Ticha, M. Tichy.  Measurer M. Tichy.  0.57-m f/5.2
        reflector + CCD.
    118 Modra.  Observers L. Kornos, P. Koleny.  0.6-m f/5.5 reflector + CCD.
    360 Kuma Kogen.  Observer A. Nakamura.  0.60-m f/6.0 Ritchey-Chretien + CCD.
    422 Loomberah.  Observer G. J. Garradd.  0.45-m f/5.4 reflector + CCD.
    691 Steward Observatory, Kitt Peak.  Observer J. Montani.  0.9-m Spacewatch
        telescope.
    
    Orbital elements:
    1998 QK56 = 1986 EC = 1986 EY4
    Id. S. Nakano; the observations of 1986 EY4 have been interchanged
    Epoch 1999 Jan. 22.0 TT = JDT 2451200.5                 Nakano
    M  16.68530              (2000.0)            P               Q
    n   0.38111774     Peri.  285.75134     -0.16186458     -0.98644386
    a   1.8840682      Node   173.38469     +0.97112095     -0.16408892
    e   0.5125768      Incl.   13.54849     +0.17528250     -0.00182637
    P   2.59           H   16.9           G   0.15           U   1
    Residuals in seconds of arc
    860306 675  0.2+  0.0     980919 557  0.1-  0.2+    981018 844  0.3-  1.2-
    860306 675  0.2-  0.1-    980919 557  0.9-  0.4-    981023 422  0.1+  0.4-
    860311 809 (0.6+ 12.3+)   980920 046  0.1-  0.7-    981023 422  0.1-  0.2+
    860311 809 (0.7+ 12.8-)   980920 046  0.4-  0.3-    981023 422  0.3-  0.6-
    980828 704  0.0   0.6-    980920 046  0.5-  0.5-    981115 360  0.1+  0.4+
    980828 704  0.6-  0.9+    980920 046  0.0   0.5-    981115 360  0.9-  0.7+
    980828 704  0.6-  0.8+    980923 557  0.5-  0.1-    981115 360  0.1-  1.1+
    980828 704  1.4-  0.3-    980923 557  0.1-  0.3+    981223 422  0.4-  0.9+
    980829 704  0.0   0.6+    980925 046  0.1-  0.1+    981223 422  0.9+  0.1+
    980829 704  0.2+  0.6+    980925 046  0.2-  0.0     981223 422  0.4+  0.7-
    980829 704  0.7+  0.9-    980925 046  0.3-  0.2+    990115 422  0.4-  0.3+
    980829 704  1.1+  0.6+    980925 046  0.2-  0.0     990115 422  0.2-  0.1+
    980829 704 (3.0-  0.1-)   980927 071 (3.3+  0.1+)   990115 422  0.5-  0.0
    980829 658  0.1+  0.1+    980927 071  1.1+  0.1+    990219 711  0.0   0.6-
    980829 658  0.1-  0.1+    980927 071  0.9+  0.4-    990219 711  0.4-  0.7+
    980829 658  0.3+  0.0     980927 071  0.6+  0.3+    990220 711  0.7-  0.1-
    980829 422  0.0   1.5+    980927 071  0.3-  0.5+    990220 711  0.4-  0.1-
    980829 422 (2.4-  0.5+)   980927 071  1.9+  0.1-    990312 118  0.0   0.0
    980829 422 (2.7-  1.3-)   980928 670  1.5+  0.5+    990312 118  0.2+  0.0
    980829 426  0.1+  0.3+    980928 670  0.2-  0.3+    990312 691  1.2-  0.9+
    980829 426  1.0+  0.5+    980928 670  0.9-  0.6+    990312 691  0.9-  0.7+
    980829 426  0.3-  0.3+    980930 046  0.0   0.2+    990312 691  1.0-  0.9+
    980830 658  0.0   0.2+    980930 046  0.4+  0.2-    990312 422  0.4-  0.2-
    980830 658  0.3+  0.5-    980930 046  0.1-  0.2-    990312 422  0.8-  0.2+
    980830 658  0.5+  0.2+    980930 046  0.5-  0.4-    990313 046  1.0+  0.2+
    980830 422  0.4-  0.6+    981001 422  0.5-  0.6+    990313 046  1.0+  0.2-
    980830 422  0.3-  0.1-    981001 422  0.1+  0.1-    990313 046  0.7+  0.5+
    980831 557  0.3-  0.0     981001 422  0.3+  0.0     990313 046  0.6+  0.2+
    980831 557  0.3-  0.5+    981015 758  1.2+  0.5-    990316 360  0.1+  0.1+
    980901 046  0.6+  0.9+    981015 758  0.2-  0.6+    990316 360  0.2+  0.3+
    980901 046  0.2+  0.5+    981015 758  1.3-  0.1+    990316 360  0.1+  0.0
    980901 046  0.5-  0.2+    981016 118  0.5-  0.5+    990317 402  1.0+  0.2+
    980901 422  1.6-  1.1-    981016 118  0.2-  0.6+    990317 402  0.6+  0.4-
    980918 426  0.6+  0.7-    981016 118  0.2-  0.6+    990317 402  0.7+  0.5-
    980918 426  0.3-  0.8-    981018 844  0.8-  0.2-
    980918 426  0.3-  0.2-    981018 844  1.2+  1.2-
    
    Ephemeris:
    1998 QK56                a,e,i = 1.88, 0.51, 14                  q = 0.9183
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    1999 03 13    15 05.26   -06 44.2    0.595    1.424   125.5    34.6    18.0
    1999 03 23    14 56.66   -02 32.8    0.604    1.499   137.6    26.6    17.9
    1999 04 02    14 43.41   +01 28.0    0.627    1.572   149.4    18.9    17.8
    1999 04 12    14 27.70   +04 53.0    0.670    1.644   158.5    12.9    17.9
    1999 04 22    14 12.10   +07 22.6    0.735    1.715   160.3    11.4    18.1
    1999 05 02    13 58.87   +08 50.7    0.821    1.783   154.4    14.2    18.5
    1999 05 12    13 49.22   +09 23.8    0.926    1.850   145.6    18.0    19.0
    1999 05 22    13 43.48   +09 13.3    1.048    1.914   136.5    21.3    19.5
    1999 06 01    13 41.44   +08 31.6    1.184    1.976   127.9    23.9    19.9
    1999 06 11    13 42.57   +07 28.7    1.331    2.036   119.8    25.7    20.2
    1999 06 21    13 46.32   +06 11.7    1.487    2.093   112.2    26.7    20.6
    1999 07 01    13 52.23   +04 46.1    1.649    2.149   105.0    27.2    20.9
    1999 07 11    13 59.84   +03 15.7    1.815    2.202    98.1    27.2    21.1
    1999 07 21    14 08.88   +01 43.0    1.983    2.253    91.5    26.8    21.4
    1999 07 31    14 19.08   +00 10.0    2.152    2.301    85.2    26.1    21.6
    1999 08 10    14 30.23   -01 21.7    2.320    2.347    79.0    25.1    21.7
    1999 08 20    14 42.21   -02 51.0    2.485    2.392    72.9    23.9    21.9
    1999 08 30    14 54.89   -04 17.0    2.646    2.434    66.9    22.4    22.0
    
    Gareth V. Williams           (C) Copyright 1999 MPC           M.P.E.C. 1999-F12
    

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