• Processing (Info)

    • MPEC 2019-E20 : 2017 YG5

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    M.P.E.C. 2019-E20                                Issued 2019 Mar. 2, 17:31 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 YG5

                          Revision to MPEC 2017-Y118

Additional Observations:
     K17Y05G KC2019 02 16.06942 06 54 08.04 -03 27 43.2          21.0 RVEE020304
     K17Y05G KC2019 02 16.13653 06 54 07.41 -03 27 33.2          21.6 RVEE020304
     K17Y05G KC2019 02 20.13986 06 53 35.41 -03 17 34.4          21.4 RVEE020304
     K17Y05G KC2019 02 20.14770 06 53 35.35 -03 17 33.5          20.9 RVEE020304

Observer details:
304 Las Campanas Observatory.  Observers T. A. Rector, A. L. Strom.
    Measurers B. A. O'keeffe, P. E. Halford, A. W. Puckett.  1.02-m f/7.0
    Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
190216 304 13.8+ 58.6-    190220 304 13.3+ 57.5-    MPO431427    +10 day

Orbital elements:
2017 YG5
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                 MPC
M 359.35297              (2000.0)            P               Q
n   0.00177459     Peri.  296.65844     -0.72208395     -0.67524087
a  67.5674507      Node   201.96097     +0.68527249     -0.72796153
e   0.8904527      Incl.   23.72722     -0.09484927     -0.11883510
P 555              H   12.5           G   0.15           U   2
Residuals in seconds of arc
171214 F51  0.1+  0.1+    171225 807  0.0   0.2-    171226 291  0.1-  0.0
171214 F51  0.2-  0.2+    171225 807  0.0   0.2-    171226 291  0.1-  0.0
171214 F51  0.0   0.2-    171225 807  0.3-  0.0     190216 304  0.0   0.1+
171214 F51  0.1+  0.1-    171225 F51  0.0   0.2+    190216 304  0.1-  0.3+
171223 F51  0.1-  0.2-    171225 F51  0.2+  0.1+    190220 304  0.1+  0.0
171223 F51  0.0   0.0     171225 F51  0.1+  0.0     190220 304  0.1+  0.3-
171223 F51  0.2-  0.1+    171225 F51  0.1+  0.1+

Ephemeris:
2017 YG5                 a,e,i = 67.57, 0.89, 24                 q = 7.4018
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2019 01 31    06 57 21.1 -04 01 45   7.0477  7.8697   144.4     4.2    21.6
...
2019 02 15    06 54 17.8 -03 30 19   7.1342  7.8402   132.9     5.3    21.7
...
2019 02 23    06 53 17.0 -03 10 11   7.2002  7.8248   126.2     5.9    21.7
...
2019 03 01    06 52 50.6 -02 54 03   7.2573  7.8135   121.0     6.2    21.8
2019 03 02    06 52 47.8 -02 51 18   7.2673  7.8116   120.1     6.3    21.8
2019 03 03    06 52 45.6 -02 48 32   7.2776  7.8097   119.2     6.4    21.8
...
2019 03 09    06 52 42.8 -02 31 43   7.3420  7.7985   114.0     6.7    21.8
...
2019 03 17    06 53 07.6 -02 09 00   7.4345  7.7839   107.0     7.0    21.8
...
2019 04 01    06 55 21.4 -01 27 28   7.6216  7.7570    94.1     7.4    21.9

A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-E20

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