[Iaude] MPEC B145: 1998 QK28 [a=2.34,e=0.58,i=7.9,H=19.2,PHA]

mpec at si.edu mpec at si.edu
Tue Jan 31 06:37:25 EST 2017


M.P.E.C. 2017-B145                               Issued 2017 Jan. 31, 11:34 UT
 
     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
    on behalf of Division F 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 at CFA.HARVARD.EDU
            URL http://www.minorplanetcenter.net/    ISSN 1523-6714


                                   1998 QK28
 
                           Revision to MPEC 1998-Q30
 
Additional Observations:
     J98Q28K  C2017 01 29.49525 09 34 07.539+05 09 49.50         21.5 wLEB145F51
     J98Q28K  C2017 01 29.50726 09 34 06.518+05 09 57.12         21.6 wLEB145F51
     J98Q28K  C2017 01 29.51927 09 34 05.477+05 10 04.61         21.6 wLEB145F51
     J98Q28K  C2017 01 29.53125 09 34 04.451+05 10 12.08         21.6 wLEB145F51
     J98Q28K |C2017 01 30.17090 09 33 11.53 +05 17 00.6          21.8 VuEB145807
     J98Q28K |C2017 01 30.17682 09 33 11.02 +05 17 04.2          21.8 VuEB145807
     J98Q28K |C2017 01 30.18293 09 33 10.51 +05 17 08.0          21.8 VuEB145807
     J98Q28K _C2017 01 30.43209909 32 49.734+05 19 38.89         21.2 GUEB145568
     J98Q28K _C2017 01 30.43308109 32 49.646+05 19 39.56         21.3 GUEB145568
     J98Q28K _C2017 01 30.43406409 32 49.563+05 19 40.15         21.4 GUEB145568
     J98Q28K KC2017 01 30.90998109 32 10.00 +05 24 47.7          21.5 GUEB145K92
     J98Q28K KC2017 01 30.91883209 32 09.24 +05 24 53.3          21.0 GUEB145K92
     J98Q28K KC2017 01 30.92546709 32 08.67 +05 24 57.6          21.2 GUEB145K92
 
Observer details:
568 Mauna Kea.  Observers R. J. Wainscoat, D. Woodworth.  Measurers M. Micheli,
    R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
    + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers B. Gibson, T. Goggia, S. Kahale,
    T. Lowe, A. Schultz, M. Willman.  Measurers K. Chambers, S. Chastel,
    L. Denneau, H. Flewelling, M. Huber, E. Lilly, E. Magnier, R. Wainscoat,
    C. Waters, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
K92 Sutherland-LCOGT B.  Observers T. Lister, S. Greenstreet, E. Gomez.
    Measurer T. Lister.  1.0-m f/8 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
170129 F51 7.33- 1.10+    170130 K92 7.37- 1.13+    MPO 87340    +18 day
 
Orbital elements:
1998 QK28                                           PHA, Earth MOID = 0.0060 AU
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5                 MPC
M  53.00863              (2000.0)            P               Q
n   0.27620532     Peri.  204.57115     +0.94364414     -0.33071813
a   2.3351495      Node   174.69287     +0.32180888     +0.90791004
e   0.5808780      Incl.    7.89127     +0.07729678     +0.25753618
P   3.57           H   19.2           G   0.15           U   1
Residuals in seconds of arc
980825 704  1.4+  1.2-    980828 557  1.1+  0.5-    980901 360  0.2+  0.5+
980825 704 (1.4-  2.5+)   980828 557  0.9+  0.6-    980901 360  0.6-  0.2-
980825 704  1.1-  1.4-    980828 557  1.0+  0.5-    980901 360  1.4-  0.2-
980825 704  1.0-  1.7-    980828 713  0.5+  0.6-    980902 860  1.1+  1.1+
980825 704  1.2-  0.9-    980828 713  1.2+  0.4-    980902 860 (2.5+  0.3+)
980825 106  0.2-  0.2+    980828 713  1.0+  0.5-    980902 860 (2.7+  0.3-)
980825 106  0.2-  0.1+    980828 713  1.2+  0.5-    980902 402  1.6+  0.2+
980826 106  0.1+  0.2+    980828 704  0.0   0.0     980902 402  0.1-  0.1+
980826 106  0.3-  0.2+    980828 704  0.7-  0.2+    980902 402  0.3+  0.1+
980826 106  0.1+  0.2+    980828 704  0.6-  0.5-    980902 402  0.2+  0.0
980826 106  0.0   0.3+    980828 704  1.1-  0.2-    980902 360  0.1-  0.2+
980826 711  0.2+  0.4+    980828 704  0.4+  0.4-    980902 360  0.1-  0.2+
980826 711  0.0   0.3+    980828 658  0.4-  0.5-    980902 360  0.1-  0.2+
980826 711  0.6-  0.2+    980828 658  0.3-  0.3-    980904 402  0.2+  0.2+
980826 596  0.0   0.5-    980828 658  0.5-  0.5-    980904 402  0.2+  0.2+
980826 596  0.4+  0.4+    980828 426  0.5+  0.1-    980904 402  0.4+  0.2-
980826 596  0.1+  0.5-    980828 426  0.3-  0.5-    980904 118  0.1-  0.2+
980826 587  0.6+  0.1+    980828 426  0.2+  0.2-    980904 118  0.3+  0.0
980826 587  0.6+  0.4+    980828 426  0.6-  0.7-    980904 118  0.3+  0.1+
980826 587  0.2+  0.9+    980828 143  1.5-  0.9-    980906 587  0.8+  0.3+
980826 620  1.4+  0.0     980828 143  0.8-  0.8-    980906 587  0.4+  0.6-
980826 620  0.5+  0.3-    980828 143  1.8-  0.8-    980906 587  0.4-  0.4-
980826 620  0.7+  0.3+    980829 670  0.1-  0.7+    980907 557  0.1+  0.4-
980826 620  0.7+  0.2+    980829 670  0.3+  0.8+    980907 557  0.1-  0.3+
980827 106  0.0   0.1+    980829 670  0.6-  0.6+    980907 557  0.3+  0.2+
980827 106  0.2+  0.0     980829 658  1.2-  1.1+    980914 557  0.6-  0.1+
980827 106  0.2-  0.1-    980829 658  1.4-  0.9+    980914 557  0.5-  0.2-
980827 758 (3.2+  0.4+)   980829 658  1.3-  1.0+    980914 557  0.5-  0.1+
980827 758 (2.0-  1.0-)   980829 151 (2.2-  0.0 )   980914 557  0.0   0.5-
980827 758  0.3+  0.3-    980829 151  0.8+  1.0+    980922 658  0.2-  1.0-
980827 713  0.2+  0.1+    980830 658  0.1-  0.2-    980922 658  0.7-  0.7-
980827 713  0.2-  0.7-    980830 658  0.7-  0.3-    980922 658  0.7-  0.7-
980827 713  1.0+  0.2+    980830 658  0.1-  0.2-    980923 557  0.5+  0.2+
980827 713  0.4+  0.4-    980830 587  0.7-  0.5-    980923 557  0.4-  1.3+
980827 713  0.6+  0.0     980830 587  0.5-  0.8+    980923 557  0.5+  0.2+
980827 713  0.4+  0.3-    980830 587  0.4-  0.5+    170129 F51  0.1-  0.3-
980827 704  1.0-  0.5-    980831 620  0.0   0.4+    170129 F51  0.1+  0.2-
980827 704  0.3-  0.1-    980831 620  0.4+  1.2+    170129 F51  0.0   0.2-
980827 704  0.5+  0.1+    980831 620  0.6-  0.4+    170129 F51  0.0   0.2-
980827 704  0.2-  0.7+    980831 620  0.0   0.6+    170130 807  0.2-  0.1+
980827 704  1.6-  0.6+    980831 046  0.3-  0.1-    170130 807  0.2-  0.0
980827 658  0.6-  0.2+    980831 046  0.1-  0.0     170130 807  0.0   0.1-
980827 658  0.1-  0.0     980831 046  0.4-  0.1-    170130 568  0.0   0.1-
980827 658  0.6-  0.0     980901 670  1.4+  0.5+    170130 568  0.0   0.1-
980827 658  0.1-  0.1+    980901 670  0.5+  0.6+    170130 568  0.0   0.1-
980827 557  1.3+  0.5-    980901 670  1.1+  0.4+    170130 K92  0.0   0.2-
980827 557  0.9+  0.4-    980901 670  0.6-  0.4+    170130 K92  0.0   0.2-
980827 468 (2.3+  0.3-)   980901 670  0.3-  0.4-    170130 K92  0.0   0.1-
980827 468  1.2+  0.9-    980901 670  0.2-  1.2+
980828 557  1.1+  0.6-    980901 360  2.0-  0.3-

Ephemeris:
1998 QK28                a,e,i = 2.34, 0.58, 8                   q = 0.9787
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2017 01 01    10 06 10.7 +01 35 11   1.1550  1.9147   126.9    24.2    22.1
...
2017 01 16    09 51 51.7 +03 03 27   1.1373  2.0267   145.6    15.9    21.9
...
2017 01 24    09 41 39.5 +04 14 26   1.1466  2.0848   156.0    11.1    21.8
...
2017 01 30    09 33 25.7 +05 15 08   1.1643  2.1277   163.6     7.5    21.7
2017 01 31    09 32 02.4 +05 25 40   1.1683  2.1348   164.8     6.9    21.7
2017 02 01    09 30 39.1 +05 36 17   1.1725  2.1418   166.0     6.4    21.7
...
2017 02 07    09 22 26.5 +06 41 00   1.2038  2.1838   171.3     3.9    21.7
...
2017 02 15    09 12 15.4 +08 06 39   1.2618  2.2388   168.7     4.9    21.9
...
2017 03 02    08 57 33.0 +10 29 21   1.4182  2.3388   151.8    11.6    22.5

A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-B145




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