[Iaude] MPEC Y148: 2020 YU4 [a=1.72,e=0.30,i=11.6,H=23.7]

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon Dec 28 10:39:56 EST 2020


M.P.E.C. 2020-Y148                            Issued 2020 December 28, 15:38 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 YU4                                    


Observations:
     K20Y04U* C2020 12 24.59615508 02 16.762+10 19 08.99         22.35wUEY148F51
     K20Y04U  C2020 12 24.60674108 02 16.799+10 18 33.82         22.40wUEY148F51
     K20Y04U  C2020 12 24.61736508 02 16.848+10 17 58.22         22.43wUEY148F51
     K20Y04U  C2020 12 24.62794608 02 16.912+10 17 23.14         22.15wUEY148F51
     K20Y04U |C2020 12 25.23112 08 02 27.85 +09 44 38.9          21.8 GVEY148807
     K20Y04U |C2020 12 25.23707 08 02 27.91 +09 44 19.2          21.8 GVEY148807
     K20Y04U |C2020 12 25.24301 08 02 27.85 +09 43 59.7          21.7 GVEY148807
     K20Y04U |C2020 12 26.20068 08 02 40.22 +08 50 57.1          22.4 GVEY148807
     K20Y04U |C2020 12 26.20889 08 02 40.22 +08 50 30.1          22.7 GVEY148807
     K20Y04U |C2020 12 26.21710 08 02 40.19 +08 50 02.4          22.5 GVEY148807
     K20Y04U KC2020 12 26.51830 08 02 41.18 +08 32 40.5                oEY148291
     K20Y04U KC2020 12 26.52653 08 02 41.17 +08 32 13.5                oEY148291
     K20Y04U KC2020 12 26.53477 08 02 41.17 +08 31 45.8                oEY148291
     K20Y04U |C2020 12 28.24335 08 02 55.99 +06 57 07.7          21.7 GVEY148807
     K20Y04U |C2020 12 28.24965 08 02 55.94 +06 56 46.7          21.7 GVEY148807
     K20Y04U |C2020 12 28.25568 08 02 55.88 +06 56 26.6          21.5 GVEY148807

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 YU4                                                 Earth MOID = 0.2271 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 348.99051              (2000.0)            P               Q
n   0.43538094     Peri.  205.39614     -0.39297407     -0.89750600
a   1.7240761      Node   268.28553     +0.87414124     -0.29706482
e   0.3047624      Incl.   11.55014     +0.28539179     -0.32593782
P   2.26           H   23.7           G   0.15           U   7
Residuals in seconds of arc
201224 F51  0.0   0.1+    201225 807  0.1-  0.1+    201226 291  0.5-  0.2+
201224 F51  0.1-  0.1+    201226 807  0.2-  0.0     201228 807  0.2+  0.1-
201224 F51  0.1-  0.2-    201226 807  0.1-  0.2+    201228 807  0.2+  0.0
201224 F51  0.1+  0.1-    201226 807  0.4-  0.2-    201228 807  0.0   0.1+
201225 807  0.1+  0.0     201226 291  0.2+  0.4-
201225 807  0.8+  0.0     201226 291  0.2-  0.2+

Ephemeris:
2020 YU4                 a,e,i = 1.72, 0.30, 12                  q = 1.1986
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 28    07 35 16.0 +29 55 23   0.3497  1.2571   134.6    33.9    23.3
...
2020 12 13    07 55 32.1 +20 14 15   0.2827  1.2250   144.2    28.0    22.6
...
2020 12 21    08 01 00.5 +13 33 59   0.2584  1.2127   149.0    24.7    22.3
...
2020 12 27    08 02 47.2 +08 06 11   0.2462  1.2059   151.8    22.7    22.1
2020 12 28    08 02 54.4 +07 10 24   0.2447  1.2050   152.1    22.5    22.1
2020 12 29    08 02 58.8 +06 14 31   0.2433  1.2042   152.4    22.3    22.1
...
2021 01 04    08 02 30.9 +00 42 01   0.2380  1.2003   153.1    21.8    22.0
...
2021 01 12    08 00 01.6 -06 08 15   0.2388  1.1987   151.4    23.1    22.1
...
2021 01 27    07 54 14.0 -15 24 10   0.2607  1.2063   144.4    28.3    22.4

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-Y148




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