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  • MPEC 2018-P103: 2018 PJ21

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    M.P.E.C. 2018-P103                               Issued 2018 Aug. 14, 18:03 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
    
                                       2018 PJ21
    
    Observations:
         K18P21J  C2018 08 11.45488 21 51 21.308-03 17 19.43         22.7 wUEP103F51
         K18P21J* C2018 08 11.46598 21 51 22.899-03 17 35.29         22.2 wUEP103F51
         K18P21J  C2018 08 11.47705 21 51 24.543-03 17 52.13         22.9 wUEP103F51
         K18P21J  C2018 08 11.48813 21 51 26.157-03 18 08.38         22.2 wUEP103F51
         K18P21J KC2018 08 12.29570321 53 38.36 -03 38 25.5          22.6 VuEP103H21
         K18P21J KC2018 08 12.30077121 53 39.10 -03 38 33.1          22.6 VuEP103H21
         K18P21J KC2018 08 12.31070121 53 40.62 -03 38 47.4          22.7 VuEP103H21
         K18P21J _C2018 08 12.46277321 54 06.070-03 42 26.76         22.2 GVEP103568
         K18P21J _C2018 08 12.46561921 54 06.486-03 42 31.08         22.1 GVEP103568
         K18P21J _C2018 08 12.46752121 54 06.769-03 42 33.98         22.2 GVEP103568
         K18P21J KC2018 08 14.47262 21 59 39.55 -04 35 03.4          22.3 RoEP103291
         K18P21J KC2018 08 14.48236 21 59 41.10 -04 35 18.8          22.7 RoEP103291
    
    Observer details:
    291 LPL/Spacewatch II.  Observer R. A. Mastaler.  1.8-m f/2.7 reflector + CCD.
    568 Mauna Kea.  Observers R. J. Wainscoat, L. Wells.  Measurers M. Micheli,
        R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
        M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
        M. Huber, E. Magnier, Y. Ramanjooloo, R. Wainscoat, C. Waters, R. Weryk.
        1.8-m Ritchey-Chretien + CCD.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  1.3-m f/4.0
        astrograph + CCD.
    
    Orbital elements:
    2018 PJ21                                                Earth MOID = 0.1963 AU
    Epoch 2018 Mar. 23.0 TT = JDT 2458200.5                 MPC
    M 313.34591              (2000.0)            P               Q
    n   0.29561435     Peri.  182.94407     +0.90413851     +0.42235614
    a   2.2317851      Node   151.79382     -0.38914772     +0.87634242
    e   0.4591327      Incl.    7.83256     -0.17634514     +0.23160149
    P   3.33           H   24.7           G   0.15           U   8
    Residuals in seconds of arc
    180811 F51  0.1+  0.2-    180812 H21  0.3+  0.3-    180812 568  0.3-  0.1-
    180811 F51  0.4-  0.3+    180812 H21  0.1-  0.3-    180812 568  0.3-  0.1-
    180811 F51  0.0   0.3-    180812 H21  0.2+  0.4+    180814 291  0.0   0.2-
    180811 F51  0.1-  0.2-    180812 568  0.2-  0.1-    180814 291  0.1-  0.0
    
    Ephemeris:
    2018 PJ21                a,e,i = 2.23, 0.46, 8                   q = 1.2071
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
    2018 07 15    20 50 58.8 +02 07 08   0.3068  1.2914   150.0    23.2    23.8
    ...
    2018 07 30    21 20 31.5 +00 35 54   0.2442  1.2448   157.8    17.9    23.0
    ...
    2018 08 07    21 39 38.6 -01 36 39   0.2207  1.2270   163.0    14.0    22.7
    ...
    2018 08 13    21 55 34.9 -03 55 52   0.2082  1.2172   167.4    10.5    22.4
    2018 08 14    21 58 21.8 -04 22 01   0.2065  1.2159   168.1     9.9    22.3
    2018 08 15    22 01 10.6 -04 48 53   0.2050  1.2147   168.9     9.3    22.3
    ...
    2018 08 21    22 18 39.0 -07 42 09   0.1986  1.2092   173.4     5.5    22.0
    ...
    2018 08 29    22 42 45.5 -11 46 02   0.1975  1.2071   175.9     3.4    21.9
    ...
    2018 09 13    23 24 58.2 -18 06 02   0.2182  1.2191   165.9    11.6    22.5
    
    A. U. Tomatic                (C) Copyright 2018 MPC           M.P.E.C. 2018-P103
    

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