[Iaude] MPEC X176: 2017 YA8 [a=1.30,e=0.29,i=11.3,H=22.3]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon Dec 14 14:57:09 EST 2020


M.P.E.C. 2020-X176                            Issued 2020 December 14, 19:56 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 YA8                                    


                            Revision to MPEC 2018-A6                            

Additional Observations:
     K17Y08A |C2020 12 13.29444 09 15 47.44 -21 41 40.9          22.0 GVEX176807
     K17Y08A |C2020 12 13.30239 09 15 49.23 -21 41 57.3          21.7 GVEX176807
     K17Y08A |C2020 12 13.30639 09 15 50.14 -21 42 05.1          21.8 GVEX176807
     K17Y08A |C2020 12 13.31037 09 15 51.01 -21 42 13.4          21.9 GVEX176807
     K17Y08A |C2020 12 13.31433 09 15 51.94 -21 42 21.6          22.2 GVEX176807
     K17Y08A |C2020 12 14.28291 09 19 41.31 -22 15 20.7          21.4 GVEX176807
     K17Y08A |C2020 12 14.28722 09 19 42.29 -22 15 29.6          22.1 GVEX176807
     K17Y08A |C2020 12 14.29172 09 19 43.33 -22 15 38.8          21.9 GVEX176807

Observer details:
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes.
    1.00-m f/10.0 astrograph + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
201213 807 0.09- 0.02-    201214 807 0.09- 0.02-    MPO477901   -0.04 days

Orbital elements:
2017 YA8                                                 Earth MOID = 0.0512 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 313.05252              (2000.0)            P               Q
n   0.66640586     Peri.   17.44304     -0.99347864     -0.08505042
a   1.2981061      Node   157.26459     +0.06614264     -0.97239845
e   0.2880041      Incl.   11.33172     +0.09287277     -0.21727330
P   1.48           H   22.3           G   0.15           U   0
Residuals in seconds of arc
171224 F51  0.0   0.2+    180123 807  0.5+  0.1-    180209 691  1.4-  0.2+
171224 F51  0.0   0.3+    180126 807  0.1+  0.0     180209 691  1.4-  0.3+
171224 F51  0.0   0.3+    180126 807  0.1-  0.0     180209 691  1.4-  0.3+
171226 568  0.1+  0.1+    180126 807  0.0   0.3+    180508 T12  0.0   0.1-
171226 568  0.1+  0.2+    180128 807  0.1-  0.0     180508 T12  0.0   0.0
171231 807  0.1+  0.0     180128 807  0.1-  0.0     180508 T12  0.0   0.0
171231 807  0.0   0.1+    180128 807  0.1+  0.2-    180614 T12  0.0   0.0
171231 807  0.1+  0.0     180203 807  0.1+  0.1-    180614 T12  0.0   0.1+
180101 807  0.3+  0.2+    180203 807  0.2+  0.0     180614 T12  0.0   0.1+
180101 807  0.3+  0.1-    180203 807  0.1+  0.1-    180614 T12  0.0   0.0
180101 807  0.3+  0.3-    180204 807  0.0   0.1-    201213 807  0.2-  0.0
180116 807  0.2+  0.2+    180204 807  0.3+  0.3-    201213 807  0.1-  0.0
180116 807  0.0   0.4+    180204 807  0.5+  0.3-    201213 807  0.1+  0.4+
180116 807  0.2+  0.1+    180204 291 (0.5+  2.1-)   201213 807  0.2-  0.3+
180121 807  0.1+  0.5+    180204 291  0.6-  0.4-    201213 807  0.4+  0.2+
180121 807  0.2+  0.2+    180204 291  0.3-  0.1+    201214 807  0.0   0.0
180121 807  0.2-  0.4+    180205 291  0.2-  0.0     201214 807  0.2-  0.0
180123 807  0.2+  0.3+    180205 291  0.1+  0.1+    201214 807  0.1-  0.1+
180123 807  0.6+  0.0     180205 291  0.2-  0.2+

Ephemeris:
2017 YA8                 a,e,i = 1.30, 0.29, 11                  q = 0.9242
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 14    07 47 01.6 -06 59 03   0.5346  1.2681   108.9    47.6    23.2
...
2020 11 29    08 27 41.2 -13 59 44   0.4279  1.2006   109.8    50.6    22.7
...
2020 12 07    08 52 56.6 -18 11 48   0.3777  1.1643   109.0    53.1    22.5
...
2020 12 13    09 14 38.1 -21 31 44   0.3432  1.1372   107.8    55.5    22.3
2020 12 14    09 18 32.9 -22 05 44   0.3377  1.1327   107.5    56.0    22.2
2020 12 15    09 22 33.6 -22 39 54   0.3323  1.1283   107.2    56.4    22.2
...
2020 12 21    09 49 01.2 -26 06 21   0.3018  1.1018   105.1    59.5    22.0
...
2020 12 29    10 32 34.5 -30 34 13   0.2665  1.0677   101.2    64.6    21.9
...
2021 01 13    12 29 23.4 -36 10 46   0.2217  1.0094    90.3    77.0    21.7

A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-X176




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