[Iaude] MPEC X50: 2013 BT18 [a=0.77,e=0.56,i=1.8,H=23.4]

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Thu Dec 6 13:39:19 EST 2018


M.P.E.C. 2018-X50                                Issued 2018 Dec. 6, 18:36 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 https://www.minorplanetcenter.net/    ISSN 1523-6714


                                   2013 BT18
 
                           Revision to MPEC 2013-B46
 
Additional Observations:
     K13B18T  C2013 01 22.44508007 42 55.408+10 07 28.25         19.1 GVEX050F51
     K13B18T  C2015 01 18.24343405 28 00.715+15 52 07.11         21.3 GVEX050F51
     K13B18T  C2015 01 19.37432905 20 34.637+15 55 56.33         20.9 GVEX050F51
     K13B18T  C2015 01 19.37567505 20 34.078+15 55 56.54         21.3 GVEX050F51
     K13B18T  C2015 01 20.23772605 15 09.198+15 58 22.59         21.9 GVEX050F51
     K13B18T  C2015 01 20.26481105 14 58.724+15 58 27.52         21.1 GVEX050F51
     K13B18T  C2015 01 24.34285104 51 35.889+16 05 51.14         21.5 GVEX050F51
     K13B18T  C2015 01 24.35734104 51 31.128+16 05 51.94         22.0 GVEX050F51
     K13B18T  C2015 01 24.37187304 51 26.393+16 05 52.67         23.0 GVEX050F51
     K13B18T  C2018 12 06.44350 04 57 27.77 +01 43 36.0          19.8 cVEX050T05
     K13B18T  C2018 12 06.45252 04 57 19.70 +01 44 01.8          19.0 cVEX050T05
     K13B18T  C2018 12 06.46088 04 57 12.32 +01 44 23.7          18.6 cVEX050T05
     K13B18T  C2018 12 06.46983 04 57 04.47 +01 44 46.6          19.9 cVEX050T05
     K13B18T KC2018 12 06.58877 04 55 24.42 +01 51 36.4          19.1 GVEX050474
     K13B18T KC2018 12 06.58968 04 55 23.63 +01 51 38.9          18.8 GVEX050474
     K13B18T KC2018 12 06.59059 04 55 22.86 +01 51 41.1          19.1 GVEX050474
     K13B18T  C2018 12 06.59100 04 55 19.52 +01 50 09.6          18.7 oVEX050T08
     K13B18T  C2018 12 06.59146 04 55 19.13 +01 50 11.2          19.1 oVEX050T08
     K13B18T KC2018 12 06.59150 04 55 22.08 +01 51 43.8          19.2 GVEX050474
     K13B18T  C2018 12 06.59192 04 55 18.66 +01 50 11.7          18.8 oVEX050T08
     K13B18T  C2018 12 06.59238 04 55 18.30 +01 50 15.4          19.2 oVEX050T08
     K13B18T  C2018 12 06.59330 04 55 17.52 +01 50 16.0          18.8 oVEX050T08
     K13B18T  C2018 12 06.59376 04 55 17.09 +01 50 17.8          18.7 oVEX050T08
 
Observer details:
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore,
    P. M. Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe,
    E. Magnier, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber,
    Y. Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, H. Flewelling, A. Heinze,
    H. Weiland, J. Tonry.  Measurers L. Denneau, H. Flewelling, A. Heinze,
    J. Tonry, A. Fitzsimmons, D. Young, N. Erasmus.  0.5-m f/2.0 Schmidt +
    CCD.
T08 ATLAS-MLO, Mauna Loa.  Observers L. Denneau, H. Flewelling, A. Heinze,
    H. Weiland, J. Tonry.  Measurers L. Denneau, H. Flewelling, A. Heinze,
    J. Tonry, A. Fitzsimmons, D. Young, N. Erasmus.  0.5-m f/2.0 Schmidt +
    CCD.
 
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
130122 F51  0.2+  0.1-    181206 T08 0.40+ 0.10+    MPO265048   -0.052 day
 
Orbital elements:
2013 BT18                                                Earth MOID = 0.0149 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M 316.15727              (2000.0)            P               Q
n   1.45020742     Peri.  117.33921     +0.15829051     +0.98734122
a   0.7730056      Node   161.76012     -0.91690497     +0.15076756
e   0.5648518      Incl.    1.84393     -0.36637328     +0.04925912
P   0.68           H   23.4           G   0.15           U   4
Residuals in seconds of arc
130118 F51  0.0   0.2+    130131 H36  0.9-  0.0     150120 F51  0.1-  0.3+
130118 F51  0.1+  0.2+    130131 H36  0.2+  0.0     150120 F51  0.0   0.2+
130118 F51  0.2+  0.3+    130131 H36 (9.1+  5.3-)   150124 F51  0.3+  0.0
130119 H21  0.0   0.0     130201 291  0.4+  0.3+    150124 F51  0.1+  0.1+
130119 H21  0.1+  0.0     130201 291  0.0   0.1+    150124 F51  0.4+  0.2+
130119 H21  0.4+  0.1+    130201 568  0.2-  0.0     181206 T05  1.5+  1.1-
130119 H21  0.1+  0.2-    130201 568  0.1-  0.0     181206 T05  0.3-  0.5+
130120 807  0.4+  0.3-    130202 291  0.1-  0.2+    181206 T05  0.6-  0.1+
130120 807  0.1+  0.0     130202 291  0.3-  0.0     181206 T05  0.3-  1.0-
130120 807  0.3+  0.2+    130206 291  0.3-  0.0     181206 474  0.2+  0.1-
130120 807  0.4+  0.1+    130206 291  0.5-  0.0     181206 474  0.1+  0.0
130120 807  0.2+  0.1-    130206 291  0.4-  0.1+    181206 474  0.2+  0.2-
130122 H21  0.0   0.0     130208 291  0.3-  0.1+    181206 T08  0.5+  0.6-
130122 H21  0.1-  0.1+    130208 291  0.8-  0.0     181206 T08  0.5+  0.2-
130122 H21  0.5+  0.5-    130208 291  0.3-  0.3+    181206 474  0.2+  0.1+
130122 F51  0.1+  0.0     130209 568  0.2+  0.0     181206 T08  0.7-  0.9-
130130 807  0.1-  0.4+    130209 568  0.1+  0.1-    181206 T08  0.2-  1.6+
130130 807  0.0   0.1-    130209 568  0.0   0.0     181206 T08  0.2-  0.2-
130130 807  0.3+  0.1-    150118 F51  0.1-  0.2+    181206 T08  0.7-  0.4+
130130 204  2.4-  0.1+    150119 F51  0.1+  0.1+
130130 204  0.1-  0.1+    150119 F51  0.2-  0.1+

Ephemeris:
2013 BT18                a,e,i = 0.77, 0.56, 2                   q = 0.3364
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2018 11 06    12 25 14.6 -10 55 03   0.1917  0.8391    33.9   138.8    26.1
...
2018 11 21    10 20 39.7 -10 26 20   0.09357 0.9729    78.1    96.5    21.7
...
2018 11 29    07 28 58.3 -05 36 00   0.07257 1.0308   126.1    50.7    19.6
...
2018 12 05    05 19 34.6 +00 34 38   0.08978 1.0686   156.6    21.4    19.4
2018 12 06    05 03 53.7 +01 23 48   0.09493 1.0744   158.6    19.5    19.4
2018 12 07    04 49 52.4 +02 08 14   0.1005  1.0801   159.6    18.6    19.5
...
2018 12 13    03 52 38.8 +05 17 11   0.1410  1.1115   152.5    24.1    20.5
...
2018 12 21    03 17 19.7 +07 38 48   0.2047  1.1463   139.1    34.2    21.7
...
2019 01 05    02 57 51.3 +10 25 11   0.3360  1.1908   120.8    45.2    23.1

A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-X50



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