[Iaude] MPEC Y128: 2020 YD4 [a=1.37,e=0.21,i=8.4,H=24.0]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2020-Y128                            Issued 2020 December 26, 03:19 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

                                    2020 YD4                                    


Observations:
     K20Y04D* C2020 12 22.42566105 26 11.250-16 58 43.75         21.07iUEY128F51
     K20Y04D  C2020 12 22.44645405 26 11.797-16 57 37.86         21.28iUEY128F51
     K20Y04D  C2020 12 22.45686505 26 12.009-16 57 03.94         20.01iUEY128F51
     K20Y04D |C2020 12 23.20085 05 26 52.50 -16 16 36.8          21.2 VuEY128807
     K20Y04D |C2020 12 23.20495 05 26 52.62 -16 16 23.6          21.1 VuEY128807
     K20Y04D |C2020 12 23.20895 05 26 52.76 -16 16 10.4          21.4 VuEY128807
     K20Y04D |C2020 12 24.18494 05 27 47.47 -15 22 20.8          21.0 VuEY128807
     K20Y04D |C2020 12 24.19018 05 27 47.62 -15 22 02.9          21.3 VuEY128807
     K20Y04D |C2020 12 24.19525 05 27 47.81 -15 21 45.5          21.2 VuEY128807
     K20Y04D |C2020 12 25.21487 05 28 45.92 -14 23 07.4          21.1 GVEY128807
     K20Y04D |C2020 12 25.21805 05 28 46.03 -14 22 56.2          21.2 GVEY128807
     K20Y04D |C2020 12 25.22084 05 28 46.13 -14 22 46.2          21.3 GVEY128807

Observer details:
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes.
    0.61-m f/6.5 astrograph + CCD, 1.00-m f/10.0 astrograph + 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.

Orbital elements:
2020 YD4                                                 Earth MOID = 0.1123 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 354.68446              (2000.0)            P               Q
n   0.61188163     Peri.  331.44161     -0.04935314     -0.99094038
a   1.3741193      Node   121.13602     +0.94187550     -0.08778554
e   0.2115409      Incl.    8.39101     +0.33231733     +0.10164089
P   1.61           H   24.0           G   0.15           U   8
Residuals in seconds of arc
201222 F51  0.0   0.5-    201223 807  0.0   0.3-    201224 807  0.9+  0.1+
201222 F51  0.3+  0.2-    201223 807  0.3+  0.1-    201225 807  0.4-  0.1+
201222 F51  0.5-  0.8+    201224 807  0.6+  0.2-    201225 807  0.4-  0.0
201223 807  0.0   0.1-    201224 807  0.4+  0.1-    201225 807  0.3-  0.1+

Ephemeris:
2020 YD4                 a,e,i = 1.37, 0.21, 8                   q = 1.0834
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 26    05 07 45.0 -27 40 05   0.1754  1.1063   129.3    43.7    22.1
...
2020 12 11    05 17 44.6 -24 23 12   0.1464  1.0891   132.6    41.7    21.6
...
2020 12 19    05 23 21.4 -19 42 56   0.1336  1.0846   136.5    38.7    21.3
...
2020 12 25    05 28 34.6 -14 36 03   0.1259  1.0834   140.4    35.4    21.1
2020 12 26    05 29 34.0 -13 36 45   0.1249  1.0834   141.1    34.8    21.1
2020 12 27    05 30 35.7 -12 35 12   0.1239  1.0835   141.8    34.1    21.1
...
2021 01 02    05 37 37.5 -05 42 29   0.1196  1.0849   146.3    30.2    20.9
...
2021 01 10    05 49 31.4 +04 49 11   0.1195  1.0896   151.2    25.8    20.8
...
2021 01 25    06 20 48.8 +23 34 58   0.1395  1.1072   149.8    26.5    21.1

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-Y128