[Iaude] MPEC Y131: 2017 YL6 [a=1.31,e=0.40,i=29.2,H=22.5]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sat Dec 26 09:03:01 EST 2020


M.P.E.C. 2020-Y131                            Issued 2020 December 26, 14:01 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

                                    2017 YL6                                    


                           Revision to MPEC 2017-Y141                           

Additional Observations:
     K17Y06L  C2020 12 25.55952708 24 48.475+40 05 32.47         22.41wUEY131F51
     K17Y06L  C2020 12 25.57021608 24 46.464+40 05 13.82         22.43wUEY131F51
     K17Y06L  C2020 12 25.58096108 24 44.449+40 04 55.32         22.49wUEY131F51
     K17Y06L  C2020 12 25.59183908 24 42.387+40 04 36.42         21.94wUEY131F51
     K17Y06L ^C2020 12 26.48639 08 22 00.01 +39 38 14.6          21.8 RVEY131695
     K17Y06L ^C2020 12 26.48889 08 21 59.51 +39 38 09.8          21.5 RVEY131695
     K17Y06L ^C2020 12 26.49139 08 21 59.04 +39 38 05.3          22.1 RVEY131695

Observer details:
695 Kitt Peak.  Observer J. V. Scotti.  2.3-m f/9 reflector + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L. Denneau, J.
    Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo,
    R. Wainscoat, 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
201225 F51 0.26+ 0.22+    201226 695 0.27+ 0.22+    MPO438046   +0.14 days

Orbital elements:
2017 YL6                                                 Earth MOID = 0.0061 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 287.40360              (2000.0)            P               Q
n   0.65532906     Peri.  281.57160     -0.73257797     +0.50414138
a   1.3126928      Node   290.30057     -0.25483337     -0.82616749
e   0.3956611      Incl.   29.18570     -0.63118102     -0.25157255
P   1.50           H   22.5           G   0.15           U   2
Residuals in seconds of arc
171224 F51  0.1+  0.2-    180105 291  0.6-  0.0     180125 807  0.4-  0.0
171224 F51  0.1+  0.1+    180112 711  0.2-  0.2-    180125 807  0.2-  0.3-
171224 F51  0.0   0.3-    180112 711  0.7-  0.1-    180204 807  0.1-  0.0
171224 F51  0.3+  0.2+    180112 711  0.2-  0.0     180204 807  0.1+  0.0
171226 291  0.5-  0.3-    180119 807  0.3+  0.1+    180204 807  0.3-  0.0
171226 291  0.4-  0.7+    180119 807  0.4+  0.1-    180220 807  0.0   0.3+
171226 291  0.2+  0.3-    180119 807  0.0   0.1-    180220 807  0.1+  0.3+
171228 I52 (1.6-  0.1-)   180120 I52  0.1+  0.1-    180220 807  0.2-  0.0
171228 I52  0.5-  0.1+    180120 I52  0.6-  0.1+    201225 F51  0.1+  0.1+
171228 I52  0.7-  0.3-    180120 I52  0.3+  0.1-    201225 F51  0.0   0.2-
171228 I52  0.2-  0.2+    180120 I52  0.8+  0.9+    201225 F51  0.0   0.1-
171229 926  0.0   1.0+    180124 807  0.0   0.2-    201225 F51  0.2-  0.1-
171229 926  0.3+  0.2-    180124 807  0.3+  0.0     201226 695  0.0   0.5+
171229 926  0.4+  0.1+    180124 807  0.7+  0.5-    201226 695  0.1-  0.4+
180105 291  0.1-  0.3+    180125 807  0.3+  0.0     201226 695  0.2+  0.6+
180105 291  0.2-  0.0     180125 807  0.2-  0.0

Ephemeris:
2017 YL6                 a,e,i = 1.31, 0.40, 29                  q = 0.7933
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 26    08 48 59.1 +46 05 24   0.7203  1.4726   118.4    36.1    24.1
...
2020 12 11    08 49 39.0 +44 17 53   0.5318  1.3933   131.1    32.2    23.2
...
2020 12 19    08 40 05.5 +42 31 19   0.4379  1.3481   139.7    28.1    22.6
...
2020 12 25    08 26 25.5 +40 20 55   0.3722  1.3129   147.6    23.7    22.1
2020 12 26    08 23 30.5 +39 52 46   0.3618  1.3070   149.0    22.8    22.0
2020 12 27    08 20 23.7 +39 22 17   0.3515  1.3010   150.5    21.8    21.9
...
2021 01 02    07 57 19.2 +35 18 15   0.2939  1.2646   160.9    14.8    21.2
...
2021 01 10    07 14 33.0 +25 51 09   0.2320  1.2148   175.4     3.7    20.1
...
2021 01 25    05 34 28.2 -06 18 46   0.1933  1.1187   130.1    42.3    20.8

A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-Y131




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