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    • MPEC 2017-B142: 2017 BS31

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    M.P.E.C. 2017-B142                               Issued 2017 Jan. 30, 15:14 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

                                   2017 BS31

Observations:
     K17B31S* C2017 01 28.33219 06 20 39.450-19 31 54.99         21.2 wLEB142F51
     K17B31S  C2017 01 28.34363 06 20 36.270-19 31 37.07         21.3 wLEB142F51
     K17B31S  C2017 01 28.35507 06 20 33.099-19 31 18.75         21.2 wLEB142F51
     K17B31S  C2017 01 28.36649 06 20 29.934-19 31 01.07         21.2 wLEB142F51
     K17B31S _C2017 01 29.30793906 16 17.535-19 05 12.23         21.2 GUEB142568
     K17B31S _C2017 01 29.30892106 16 17.256-19 05 10.58         21.1 GUEB142568
     K17B31S _C2017 01 29.30991006 16 16.976-19 05 08.89         21.1 GUEB142568
     K17B31S KC2017 01 29.78741306 14 07.21 -18 50 50.3          21.1 GUEB142K92
     K17B31S KC2017 01 29.79636006 14 04.67 -18 50 34.2          20.7 GUEB142K92
     K17B31S KC2017 01 29.79951606 14 03.78 -18 50 28.9          20.9 GUEB142K92
     K17B31S |C2017 01 30.11077 06 12 37.72 -18 41 09.3          21.5 VuEB142807
     K17B31S |C2017 01 30.11468 06 12 36.57 -18 41 02.6          21.6 VuEB142807
     K17B31S |C2017 01 30.11859 06 12 35.40 -18 40 55.2          21.6 VuEB142807
     K17B31S  C2017 01 30.21741 06 12 08.38 -18 38 24.1          21.6 VqEB142I52
     K17B31S  C2017 01 30.22266 06 12 06.85 -18 38 14.0          21.4 VqEB142I52
     K17B31S  C2017 01 30.22412 06 12 06.45 -18 38 11.4          21.2 VqEB142I52
     K17B31S  C2017 01 30.22559 06 12 06.02 -18 38 08.9          21.0 VqEB142I52
     K17B31S  C2017 01 30.24501306 12 00.38 -18 37 32.8          20.8 GUEB142H01
     K17B31S  C2017 01 30.24993406 11 58.98 -18 37 23.6          21.1 GUEB142H01
     K17B31S  C2017 01 30.26092806 11 55.83 -18 37 03.2          21.1 GUEB142H01
     K17B31S  C2017 01 30.26549306 11 54.52 -18 36 54.6          20.9 GUEB142H01

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.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer J. A. Johnson.
    Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. G. Matheny,
    R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
K92 Sutherland-LCOGT B.  Observers T. Lister, S. Greenstreet, E. Gomez.
    Measurer T. Lister.  1.0-m f/8 Ritchey-Chretien + CCD.

Orbital elements:
2017 BS31                                           PHA, Earth MOID = 0.0270 AU
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5                 MPC
M 316.10041              (2000.0)            P               Q
n   0.69402286     Peri.   81.62922     -0.57133489     +0.80465874
a   1.2634368      Node   151.55329     -0.82065695     -0.56249691
e   0.4679067      Incl.   19.82589     +0.00993065     -0.19005668
P   1.42           H   21.9           G   0.15           U   8
Residuals in seconds of arc
170128 F51  0.0   0.0     170129 K92  0.2+  0.0     170130 I52  0.2-  0.1-
170128 F51  0.0   0.1-    170129 K92  0.2+  0.3+    170130 I52  0.0   0.2-
170128 F51  0.2+  0.2+    170129 K92  0.3+  0.1+    170130 I52  0.1-  0.4-
170128 F51  0.4+  0.2-    170130 807  0.4+  0.2+    170130 H01  0.4+  0.1+
170129 568  0.2+  0.1+    170130 807  0.1-  0.3-    170130 H01  0.5+  0.2+
170129 568  0.2+  0.1+    170130 807  0.8-  0.0     170130 H01  0.5+  0.1+
170129 568  0.2+  0.1+    170130 I52  0.1+  0.5-    170130 H01  0.4+  0.2+

Ephemeris:
2017 BS31                a,e,i = 1.26, 0.47, 20                  q = 0.6723
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2016 12 31    07 46 21.5 -21 02 07   0.5219  1.3931   133.1    31.0    22.5
...
2017 01 15    07 11 11.2 -22 26 05   0.3924  1.2932   135.5    32.2    21.8
...
2017 01 23    06 43 00.3 -21 20 47   0.3349  1.2360   132.7    35.9    21.5
...
2017 01 29    06 17 40.6 -19 13 35   0.2977  1.1914   128.0    40.7    21.2
2017 01 30    06 13 08.5 -18 44 38   0.2920  1.1839   126.9    41.7    21.2
2017 01 31    06 08 31.5 -18 13 18   0.2865  1.1763   125.9    42.7    21.2
...
2017 02 06    05 39 13.5 -14 12 57   0.2567  1.1300   118.1    50.3    21.1
...
2017 02 14    04 56 17.5 -06 28 05   0.2261  1.0668   104.5    63.7    21.1
...
2017 03 01    03 21 53.8 +13 31 14   0.2025  0.9457    71.3    97.0    21.8

A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-B142

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