[Iaude] MPEC X55: 2015 XX377 [a=1.85,e=0.40,i=18.2,H=23.7]

[mpec at marsden.cfa.harvard.edu]

M.P.E.C. 2020-X55                              Issued 2020 December 7, 19:30 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

                                   2015 XX377                                   


                           Revision to MPEC 2015-X177                           

Additional Observations:
     K15Xb7X  C2020 11 17.44852202 37 01.211+22 30 40.94         21.77GVEX055F51
     K15Xb7X  C2020 11 17.46107602 37 01.269+22 29 46.44         21.83GVEX055F51
     K15Xb7X  C2020 11 17.47355302 37 01.300+22 28 52.33         21.40GVEX055F51
     K15Xb7X  C2020 11 17.48607602 37 01.357+22 27 57.05         21.63GVEX055F51
     K15Xb7X  C2020 12 07.29890602 51 49.264-05 12 04.75         21.67wUEX055F51
     K15Xb7X  C2020 12 07.30928802 51 49.880-05 12 56.17         21.45wUEX055F51
     K15Xb7X  C2020 12 07.33003702 51 51.134-05 14 39.24         22.16wUEX055F51

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
    Schultz, M. Willman.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
    Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau, J. Fairlamb, H.
    Flewelling, C.-C. Lin, E. Magnier.  1.8-m Ritchey-Chretien + CCD.

First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
201117 F51   42-    5-    201207 F51   51-   12-    MPO358613   -9.88 days

Orbital elements:
2015 XX377                                               Earth MOID = 0.1900 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
M 350.46268              (2000.0)            P               Q
n   0.39314945     Peri.  225.39518     -0.18828291     -0.94648721
a   1.8454301      Node   237.20377     +0.96606008     -0.13042398
e   0.3985531      Incl.   18.16982     +0.17685438     -0.29521442
P   2.51           H   23.7           G   0.15           U   2
Residuals in seconds of arc
151209 F51  0.1+  0.4-    151210 568  0.1-  0.1+    201117 F51  0.1+  0.0
151209 F51  0.2-  0.0     151210 568  0.1-  0.1-    201117 F51  0.0   0.4+
151209 F51  0.0   0.2-    151210 568  0.1-  0.0     201117 F51  0.0   0.1-
151209 F51  0.2-  0.1-    151210 568  0.1-  0.0     201207 F51  0.3+  0.0
151210 291  0.2+  0.4+    151215 291  0.4+  0.3+    201207 F51  0.0   0.2+
151210 291  0.2-  0.8+    151215 291  0.9+  0.1+    201207 F51  0.1-  0.3+
151210 291  0.4-  0.1+    151215 291  0.9+  0.2+
151210 568  0.1-  0.0     201117 F51  0.2-  0.3-

Ephemeris:
2015 XX377               a,e,i = 1.85, 0.40, 18                  q = 1.1099
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 11 07    02 35 39.1 +32 56 55   0.3004  1.2813   163.0    13.0    22.4
...
2020 11 22    02 38 41.7 +16 41 30   0.2374  1.2163   162.6    14.1    21.8
...
2020 11 30    02 43 59.6 +05 17 47   0.2239  1.1864   150.7    24.0    21.9
...
2020 12 06    02 50 12.3 -03 23 02   0.2230  1.1667   140.8    32.2    22.1
2020 12 07    02 51 25.9 -04 46 55   0.2236  1.1637   139.2    33.6    22.2
2020 12 08    02 52 42.8 -06 09 28   0.2243  1.1607   137.6    34.9    22.2
...
2020 12 14    03 01 32.4 -13 49 29   0.2324  1.1445   128.8    42.1    22.5
...
2020 12 22    03 16 14.4 -22 08 20   0.2504  1.1274   119.3    49.6    22.8
...
2021 01 06    03 51 08.2 -32 00 06   0.2953  1.1108   108.0    57.3    23.3

A. U. Tomatic                (C) Copyright 2020 MPC           M.P.E.C. 2020-X55