[Iaude] MPEC Y153: 2020 YY4 [a=2.57,e=0.50,i=14.5,H=20.7]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2020-Y153                            Issued 2020 December 29, 15:08 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 YY4                                    


Observations:
     K20Y04Y* C2020 12 24.60153808 38 55.735+14 39 08.18         21.51wUEY153F51
     K20Y04Y  C2020 12 24.61215508 38 55.828+14 38 51.62         21.87wUEY153F51
     K20Y04Y  C2020 12 24.62276208 38 55.939+14 38 34.98         21.36wUEY153F51
     K20Y04Y  C2020 12 24.63335008 38 55.993+14 38 18.09         22.03wUEY153F51
     K20Y04Y KC2020 12 25.32875 08 39 06.26 +14 19 59.5                oEY153291
     K20Y04Y KC2020 12 25.34873 08 39 06.35 +14 19 29.1          21.2 RoEY153291
     K20Y04Y |C2020 12 28.26845 08 39 31.91 +13 00 10.6          21.2 GVEY153807
     K20Y04Y |C2020 12 28.27475 08 39 31.90 +13 00 00.0          21.3 GVEY153807
     K20Y04Y |C2020 12 28.28078 08 39 31.92 +12 59 49.9          21.5 GVEY153807
     K20Y04Y |C2020 12 29.27495 08 39 35.85 +12 31 39.4          21.1 GVEY153807
     K20Y04Y |C2020 12 29.28151 08 39 35.83 +12 31 28.2          21.2 GVEY153807
     K20Y04Y |C2020 12 29.28808 08 39 35.81 +12 31 16.8          21.3 GVEY153807

Observer details:
291 LPL/Spacewatch II.  Observer R. A. Mastaler.  1.8-m f/2.7 reflector + CCD.
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes.
    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 YY4                                                 Earth MOID = 0.3731 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 339.00993              (2000.0)            P               Q
n   0.23982141     Peri.  244.98572     -0.94060026     -0.23476240
a   2.5657288      Node   280.66026     +0.32228699     -0.84459097
e   0.5021316      Incl.   14.45255     -0.10678136     -0.48119924
P   4.11           H   20.7           G   0.15           U   7
Residuals in seconds of arc
201224 F51  0.1+  0.1-    201225 291  0.6+  0.8-    201228 807  0.1+  0.2+
201224 F51  0.0   0.1+    201225 291  0.3-  0.3+    201229 807  0.1+  0.1-
201224 F51  0.2+  0.1+    201228 807  0.2-  0.1+    201229 807  0.1+  0.0
201224 F51  0.4-  0.1-    201228 807  0.3-  0.1+    201229 807  0.1+  0.1-

Ephemeris:
2020 YY4                 a,e,i = 2.57, 0.50, 14                  q = 1.2774
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 29    08 20 50.8 +23 13 48   0.8986  1.6709   124.8    29.0    22.9
...
2020 12 14    08 34 13.2 +18 46 42   0.7203  1.5836   136.0    25.6    22.2
...
2020 12 22    08 38 10.9 +15 45 09   0.6381  1.5392   142.4    23.0    21.8
...
2020 12 28    08 39 30.3 +13 07 32   0.5832  1.5072   147.2    20.7    21.4
2020 12 29    08 39 34.9 +12 39 21   0.5746  1.5020   148.0    20.3    21.4
2020 12 30    08 39 37.1 +12 10 37   0.5663  1.4968   148.8    19.9    21.3
...
2021 01 05    08 38 56.7 +09 06 22   0.5198  1.4666   153.4    17.5    21.0
...
2021 01 13    08 35 43.3 +04 30 44   0.4684  1.4286   158.0    14.9    20.7
...
2021 01 28    08 24 14.6 -05 05 29   0.4063  1.3665   156.3    16.9    20.3

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-Y153