• MPC Preparation (Info)

    • MPEC 2018-O17 : S/2017 J 9

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    M.P.E.C. 2018-O17                                Issued 2018 July 17, 14:27 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@CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                                  S/2017 J 9

Observations:
    SK17J090 5C2017 02 24.55815 13 31 23.39 -07 43 58.5          23.7 rcEO017568
    SK17J090 5C2017 02 24.62650 13 31 22.60 -07 43 51.0          23.8 rcEO017568
    SK17J090*.C2017 03 23.25159 13 22 53.30 -06 35 33.2          23.0 rcEO017807
    SK17J090 .C2017 03 26.27648 13 21 33.57 -06 25 54.1          23.1 rcEO017807
    SK17J090 .C2017 03 26.32458 13 21 32.28 -06 25 44.6          23.1 rcEO017807
    SK17J090  C2017 04 23.06211 13 08 19.24 -04 54 55.6          22.7 rcEO017304
    SK17J090  C2017 04 23.07765 13 08 18.78 -04 54 52.8          22.7 rcEO017304
    SK17J090 .C2018 04 12.19240 15 10 00.282-16 44 40.19         23.5 rUEO017807
    SK17J090 .C2018 04 12.19562 15 10 00.185-16 44 41.34         23.4 rUEO017807
    SK17J090 .C2018 04 13.17718 15 09 38.686-16 43 36.11         23.6 rUEO017807
    SK17J090 .C2018 04 13.19587 15 09 38.264-16 43 34.50         23.4 rUEO017807
    SK17J090 .C2018 05 12.14135 14 56 57.998-16 02 38.32         23.0 rUEO017807
    SK17J090 .C2018 05 12.16110 14 56 57.422-16 02 36.43         23.0 rUEO017807
    SK17J090  C2018 05 17.24340 14 54 39.164-15 54 49.37         22.9 rUEO017304
    SK17J090  C2018 05 17.25862 14 54 38.740-15 54 48.27         22.9 rUEO017304

Observer details:
304 Las Campanas Observatory.  Observer S. S. Sheppard.  6.5-m Magellan-Baade
    telescope + CCD.
568 Mauna Kea.  Observer S. S. Sheppard.  8.2-m Subaru Telescope + CCD.
807 Cerro Tololo Observatory, La Serena.  Observer S. S. Sheppard.  4.0-m
    CTIO reflector + CCD.

Orbital elements:
S/2017 J 9
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
M 259.48554              (2000.0)            P               Q
n   0.56171322     Peri.  317.78631     +0.92009909     -0.13012913
a   0.1432504      Node   306.44369     -0.09860601     -0.98977627
e   0.2287964      Incl.  152.66144     -0.37907061     -0.05838965
P   1.75           H   16.1           P/d   640.90
From 15 observations 2017 Feb. 24-2018 May 17, mean residual 0".29.

Residuals in seconds of arc
170224 568  0.1+  0.3+    170423 304  0.1+  0.0     180413 807  0.1+  0.3+
170224 568  0.2+  0.3+    170423 304  0.2-  0.0     180512 807  0.0   0.1-
170323 807  0.5-  0.4-    180412 807  0.0   0.9+    180512 807  0.2-  0.1-
170326 807  0.2-  0.3-    180412 807  0.4-  0.5-    180517 304  0.2+  0.2-
170326 807  0.3+  0.1-    180413 807  0.0   0.1-    180517 304  0.1+  0.5-

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-O17

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