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  • MPEC 2021-J108 : 2021 JR2

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    M.P.E.C. 2021-J108                                  Issued 2021 May 9, 02:55 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
    
                                    2021 JR2                                 
    
    
    Observations:
         K21J02R* C2021 05 07.41208917 33 50.95 +10 22 13.7          20.36GVEJ108G96
         K21J02R  C2021 05 07.41721617 33 53.72 +10 21 36.3          20.27GVEJ108G96
         K21J02R  C2021 05 07.42743917 33 59.30 +10 20 20.8          20.06GVEJ108G96
         K21J02R KC2021 05 07.46751817 34 21.23 +10 15 24.9          20.09GVEJ108I52
         K21J02R KC2021 05 07.46849917 34 21.82 +10 15 16.8          19.82GVEJ108I52
         K21J02R KC2021 05 07.46948317 34 22.36 +10 15 09.6          20.24GVEJ108I52
         K21J02R KC2021 05 07.97041717 39 39.41 +09 09 58.6          20.2 VZEJ108B37
         K21J02R KC2021 05 07.98273117 39 46.86 +09 08 19.8          19.7 VZEJ108B37
         K21J02R KC2021 05 07.99206717 39 51.27 +09 06 58.1          20.3 GVEJ108595
         K21J02R KC2021 05 07.99503517 39 54.37 +09 06 39.7                ZEJ108B37
         K21J02R KC2021 05 07.99609717 39 53.69 +09 06 25.1                VEJ108595
         K21J02R pC2021 05 07.99758117 39 54.60 +09 06 13.2          20.2 GVEJ108L01
         K21J02R KC2021 05 07.99899917 39 55.51 +09 06 01.8          20.3 GVEJ108L01
         K21J02R IC2021 05 08.00068217 39 56.48 +09 05 48.1          20.5 GVEJ108L01
         K21J02R KC2021 05 08.00250017 39 57.65 +09 05 33.4          20.4 GVEJ108L01
         K21J02R  C2021 05 08.33765017 43 39.94 +08 18 47.8          20.1 GVEJ108H01
         K21J02R  C2021 05 08.34140017 43 42.32 +08 18 15.2          19.7 GVEJ108H01
         K21J02R  C2021 05 08.35192517 43 49.00 +08 16 43.9          20.2 GVEJ108H01
         K21J02R  C2021 05 08.35843117 43 53.12 +08 15 47.2          20.2 GVEJ108H01
         K21J02R KC2021 05 08.37178617 44 02.07 +08 13 53.3                VEJ108I52
         K21J02R KC2021 05 08.37277417 44 02.74 +08 13 45.0                VEJ108I52
         K21J02R KC2021 05 08.37376517 44 03.36 +08 13 36.8          20.27GVEJ108I52
         K21J02R KC2021 05 08.37474717 44 03.99 +08 13 28.1          20.24GVEJ108I52
         K21J02R KC2021 05 09.04071 17 52 01.67 +06 29 12.5          20.0 GVEJ108K88
         K21J02R KC2021 05 09.04317 17 52 03.48 +06 28 47.7          20.0 GVEJ108K88
         K21J02R KC2021 05 09.04564 17 52 05.29 +06 28 23.4          19.5 GVEJ108K88
    
    Observer details:
    595 Farra d'Isonzo.  Observer E. Pettarin.  0.61-m f/4.5 reflector + CCD.
    B37 Obs. de L Ametlla del Valles, Barcelona.  Observer A. Garrigos.  0.51-m
        f/4.0 reflector + CCD.
    G96 Mt. Lemmon Survey.  Observer H. Groeller.  Measurers E. J. Christensen, G.
        A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
        Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L.
        Seaman, F. C. Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
        Measurer W. H. Ryan.  2.4-m f/8.9 Ritchey-Chretien + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer G. J. Leonard.
        Measurers E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D.
        Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A.
        Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.  1.0-m
        reflector + CCD.
    K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
    L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
        + CCD.
    
    Orbital elements:
    2021 JR2                                                 Earth MOID = 0.0127 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
    M 248.41226              (2000.0)            P               Q                  
    n   0.59109757     Peri.  226.27621     +0.18783632     +0.95598540             
    a   1.4061444      Node    55.87207     -0.80460093     +0.28138803             
    e   0.3239025      Incl.   15.80140     -0.56332482     -0.08314261             
    P   1.67           H   24.53          G   0.15           U   9                  
    Residuals in seconds of arc
    210507 G96  0.0   0.0     210507 L01  0.6-  0.5-    210508 I52  0.5-  0.6-
    210507 G96  0.3-  0.1+    210507 L01  0.1+  0.4-    210508 I52  0.2+  0.2-
    210507 G96  0.2-  0.2-    210508 L01  0.7-  0.4-    210508 I52  0.0   0.2+
    210507 I52  0.6-  0.6+    210508 L01  0.3+  0.3-    210508 I52  0.1+  0.1+
    210507 I52  0.1+  0.2-    210508 H01  0.2+  0.1+    210509 K88  0.5-  0.9+
    210507 I52  0.0   0.1-    210508 H01  0.2+  0.0     210509 K88  0.1+  0.5+
    210507 595  0.1-  0.8+    210508 H01  0.2+  0.0     210509 K88  0.7+  0.8+
    210507 595  0.5-  0.5+    210508 H01  0.1+  0.0
    
    Ephemeris:
    2021 JR2                 a,e,i = 1.41, 0.32, 16                  q = 0.9507
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 04 09    15 57 19.4 +22 22 22   0.2624  1.1855   129.4    40.7    23.6
    ...
    2021 04 24    16 26 57.3 +21 21 17   0.1553  1.1145   131.4    42.6    22.4
    ...
    2021 05 02    16 55 49.0 +17 31 06   0.1018  1.0791   132.5    43.5    21.4
    ...
    2021 05 08    17 39 52.9 +09 07 21   0.06510 1.0544   132.5    44.9    20.4
    2021 05 09    17 51 29.6 +06 37 40   0.05962 1.0504   132.1    45.5    20.2
    2021 05 10    18 05 08.0 +03 36 38   0.05447 1.0465   131.3    46.4    20.1
    ...
    2021 05 16    20 39 57.5 -27 42 53   0.03748 1.0243   109.6    68.4    19.9
    ...
    2021 05 24    01 01 34.0 -42 30 08   0.06677 0.9983    75.8   100.5    22.3
    ...
    2021 06 08    02 49 48.2 -35 53 18   0.1586  0.9635    66.7   104.6    24.3
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-J108
    


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