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  • MPEC 2017-U152: 2015 RA83

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    M.P.E.C. 2017-U152                               Issued 2017 Oct. 21, 11:59 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@CFA.HARVARD.EDU
                URL https://www.minorplanetcenter.net/    ISSN 1523-6714
    
                                       2015 RA83
    
                               Revision to MPEC 2015-S20
    
    Additional Observations:
         K15R83A KC2017 10 19.85576122 35 47.627-30 07 43.67         20.7 GUEU152J04
         K15R83A KC2017 10 19.86561722 35 46.155-30 07 25.21         20.3 GUEU152J04
         K15R83A KC2017 10 19.87547222 35 44.724-30 07 07.55         20.6 GUEU152J04
         K15R83A KC2017 10 20.93741422 33 16.568-29 34 30.09         21.1 RtEU152Y28
         K15R83A KC2017 10 20.94917822 33 14.872-29 34 08.36         21.6 RtEU152Y28
         K15R83A KC2017 10 20.96092622 33 13.208-29 33 46.38         21.5 RtEU152Y28
    
    Observer details:
    J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers
        M. Micheli, D. Koschny, M. Busch, E. Schwab, A. Knoefel.  1.0-m f/4.4
        reflector + CCD.
    Y28 OASI, Nova Itacuruba.  Observers F. Monteiro, E. Rondon, H. Medeiros,
        P. Arcoverde, D. Lazzaro, R. Souza, T. Rodrigues.  Measurer M. Micheli.
        1.0-m f/7 reflector + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    171019 J04 0.15- 0.16-    171020 Y28 0.14- 0.17-    MPO353742   +0.39 day
    
    Orbital elements:
    2015 RA83                                                Earth MOID = 0.1492 AU
    Epoch 2017 Sept. 4.0 TT = JDT 2458000.5                 MPC
    M 291.93881              (2000.0)            P               Q
    n   0.46224633     Peri.   84.84009     -0.25394825     -0.95105884
    a   1.6566105      Node    22.42710     +0.59798561     -0.29745148
    e   0.4876744      Incl.   27.48309     +0.76021280     -0.08372396
    P   2.13           H   20.4           G   0.15           U   3
    Residuals in seconds of arc
    150911 F51  0.1-  0.1-    150912 568  0.0   0.2-    151008 H21  0.5+  1.1-
    150911 F51  0.1-  0.0     150912 568  0.0   0.2-    151008 H21  0.8+  1.0-
    150911 F51  0.0   0.1-    150916 H21  0.4-  0.0     151020 H21  0.3-  0.2+
    150911 F51  0.0   0.0     150916 H21  0.5-  0.0     151020 H21  0.2-  0.7+
    150912 W86  0.0   0.2-    150916 H21  0.8-  0.1+    151020 H21  0.0   0.7+
    150912 W86  0.1+  0.4-    150916 568  0.3+  0.2-    151020 H21  0.1-  0.0
    150912 W86  0.2+  0.5-    150916 568  0.1+  0.2-    151020 H21  0.1-  0.1+
    150912 H21  0.0   0.1-    150916 568  0.1+  0.2-    171019 J04  0.1-  0.3-
    150912 291  0.0   0.2+    150920 291  0.3+  0.2+    171019 J04  0.3-  0.4+
    150912 291  0.2-  0.3+    150920 291  0.2+  0.3-    171019 J04  0.1+  0.3+
    150912 H21  0.0   0.2-    150920 291  0.2-  0.2+    171020 Y28  0.1+  0.1-
    150912 291  0.3-  0.5+    151001 291  0.0   0.1+    171020 Y28  0.1-  0.2-
    150912 H21  0.3+  0.4-    151001 291  0.3+  0.1+    171020 Y28  0.2+  0.0
    150912 568  0.1+  0.2-    151008 H21  0.2+  0.3-
    
    Ephemeris:
    2015 RA83                a,e,i = 1.66, 0.49, 27                  q = 0.8487
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2017 09 21    00 04 49.8 -37 52 53   0.7132  1.6303   142.8    21.9    21.8
    ...
    2017 10 06    23 15 29.1 -35 43 22   0.6540  1.5282   134.0    28.1    21.6
    ...
    2017 10 14    22 51 01.4 -32 51 24   0.6409  1.4718   126.5    33.0    21.7
    ...
    2017 10 20    22 35 27.0 -30 03 11   0.6381  1.4286   120.3    37.0    21.7
    2017 10 21    22 33 07.9 -29 32 30   0.6381  1.4213   119.3    37.6    21.7
    2017 10 22    22 30 53.9 -29 01 10   0.6383  1.4140   118.3    38.3    21.7
    ...
    2017 10 28    22 19 14.9 -25 41 30   0.6418  1.3701   112.0    42.2    21.8
    ...
    2017 11 05    22 08 12.9 -20 53 24   0.6511  1.3108   103.9    47.2    21.8
    ...
    2017 11 20    21 59 00.3 -11 21 52   0.6743  1.1990    90.3    55.5    22.0
    
    A. U. Tomatic                (C) Copyright 2017 MPC           M.P.E.C. 2017-U152
    

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