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  • MPEC 2017-Y140: 2015 YT9

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    M.P.E.C. 2017-Y140                               Issued 2017 Dec. 29, 20:52 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
    
                                       2015 YT9
    
                               Revision to MPEC 2015-Y93
    
    Additional Observations:
         K15Y09T  C2014 01 24.37724 09 18 02.549+17 13 19.75         21.0 wLEY140F51
         K15Y09T  C2014 01 24.39041 09 18 00.543+17 13 35.80         22.1 wLEY140F51
         K15Y09T  C2014 01 24.40360 09 17 58.562+17 13 52.05         23.2 wLEY140F51
         K15Y09T  C2014 01 24.41682 09 17 56.553+17 14 08.30         22.2 wLEY140F51
         K15Y09T  C2014 02 23.26037 08 22 26.023+23 51 09.20         23.2 wLEY140F51
         K15Y09T  C2014 02 23.27292 08 22 25.216+23 51 14.20         23.0 wLEY140F51
         K15Y09T  C2014 02 23.28548 08 22 24.361+23 51 19.64         21.9 wLEY140F51
         K15Y09T  C2014 02 23.29812 08 22 23.537+23 51 24.39         22.6 wLEY140F51
         K15Y09T  C2017 12 29.18545 03 27 52.28 -30 50 51.2          18.4 RoEY140926
         K15Y09T  C2017 12 29.18789 03 27 53.96 -30 50 15.8          18.3 RoEY140926
         K15Y09T  C2017 12 29.19035 03 27 55.62 -30 49 40.5          18.5 RoEY140926
    
    Observer details:
    926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
        M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, 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.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    140124 F51 0.06+ 0.01-    171229 926 0.65- 0.10-    MPO386959   +0.088 day
    
    Orbital elements:
    2015 YT9                                                 Earth MOID = 0.1095 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 330.11554              (2000.0)            P               Q
    n   0.47952189     Peri.  232.45233     +0.98904277     +0.01964245
    a   1.6165796      Node   125.95646     +0.02449406     +0.95553846
    e   0.6203394      Incl.   10.41389     -0.14558313     +0.29421153
    P   2.06           H   20.6           G   0.15           U   2
    Residuals in seconds of arc
    140124 F51  0.2+  0.3+    160101 807  0.1-  0.3-    160112 691  0.2-  0.2+
    140124 F51  0.1-  0.1+    160101 807  0.1-  0.2-    160115 691  0.1+  0.6-
    140124 F51  0.1+  0.1+    160101 807  0.3-  0.3-    160115 691  0.4+  0.3-
    140124 F51  0.0   0.1+    160101 H21  0.1+  0.5-    160115 691  0.8+  0.8-
    140223 F51  0.1-  0.0     160101 H21  0.0   0.0     160127 691  1.1-  0.6-
    140223 F51  0.1+  0.0     160101 H21  0.2-  0.1-    160127 691  0.8-  0.5+
    140223 F51  0.3-  0.4+    160102 H21  0.1+  0.5+    160127 691  0.5-  0.2-
    140223 F51  0.1-  0.1+    160102 H21  0.2-  0.4+    160130 G96  0.5-  1.0+
    151224 F51  0.0   0.0     160102 H21  0.7+  0.1-    160130 G96  0.8+  0.2-
    151224 F51  0.1-  0.1+    160102 691  0.4+  0.4-    160130 G96  0.4+  0.2+
    151224 F51  0.1-  0.1+    160102 691  0.2-  0.1+    160130 G96  0.1+  0.1+
    151227 695  0.5+  0.4-    160102 691  0.2-  0.5-    160201 F51  0.1+  0.1+
    151227 695  0.7+  0.8+    160103 703  0.2+  1.1-    160201 F51  0.1+  0.1+
    151230 291  0.2+  0.1+    160103 703  0.7+  0.3-    160201 F51  0.1+  0.3-
    151230 291  0.5-  0.4+    160103 703  0.2+  0.5+    160205 F51  0.1-  0.1+
    151230 291  0.1-  0.3+    160103 703  1.4+  0.5-    160205 F51  0.1+  0.2+
    151230 104  0.6+  0.3-    160107 F51  0.2+  0.1+    160205 F51  0.2-  0.1+
    151230 104  0.0   0.3-    160107 F51  0.2+  0.2+    171229 926  0.1-  0.4+
    151231 104  0.3+  0.3-    160107 F51  0.1-  0.2+    171229 926  0.0   0.6+
    160101 807  0.0   0.3-    160112 691  0.3+  0.2-    171229 926  0.2-  0.3+
    160101 807  0.0   0.5-    160112 691  0.2-  0.1+
    
    Ephemeris:
    2015 YT9                 a,e,i = 1.62, 0.62, 10                  q = 0.6138
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 11 29    18 36 40.0 -44 09 24   0.3537  0.7319    36.3   127.1    23.1
    ...
    2017 12 14    20 49 57.0 -59 52 39   0.1877  0.8785    51.0   119.4    21.5
    ...
    2017 12 22    00 57 18.4 -58 00 28   0.1363  0.9633    77.4    94.6    19.6
    ...
    2017 12 28    03 12 35.1 -35 41 25   0.1358  1.0275   105.2    67.4    18.7
    2017 12 29    03 25 38.5 -31 34 55   0.1395  1.0382   109.4    63.3    18.7
    2017 12 30    03 36 58.4 -27 37 46   0.1441  1.0488   113.3    59.4    18.6
    ...
    2018 01 05    04 21 53.8 -08 48 29   0.1876  1.1125   129.7    42.9    18.9
    ...
    2018 01 13    04 52 55.9 +05 11 18   0.2706  1.1959   137.0    34.1    19.6
    ...
    2018 01 28    05 25 31.3 +16 35 12   0.4627  1.3461   133.6    32.0    20.9
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-Y140
    

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