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  • MPEC 2021-R124 : 2021 RB2

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    M.P.E.C. 2021-R124                            Issued 2021 September 7, 10:23 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 RB2                                 
    
    
    Observations:
         K21R02B* C2021 09 05.38325700 11 37.785+16 40 18.87         21.29wUER124F52
         K21R02B  C2021 09 05.40509500 11 42.100+16 40 15.89         21.12wUER124F52
         K21R02B  C2021 09 05.41605300 11 44.248+16 40 14.50         20.96wUER124F52
         K21R02B  C2021 09 05.59938800 12 20.436+16 39 41.85         20.98GVER124F51
         K21R02B  C2021 09 05.60024100 12 20.593+16 39 41.74         20.99GVER124F51
         K21R02B IC2021 09 05.87020700 13 20.72 +16 38 38.3          21.2 GVER124L01
         K21R02B KC2021 09 05.87294000 13 21.30 +16 38 37.4          21.2 GVER124L01
         K21R02B KC2021 09 05.87567300 13 21.86 +16 38 36.9          21.1 GVER124L01
         K21R02B KC2021 09 05.87801300 13 22.32 +16 38 36.4          21.0 GVER124L01
         K21R02B 1C2021 09 05.88155 00 13 22.96 +16 38 33.4          21.4 VVER124033
         K21R02B 1C2021 09 05.88340 00 13 23.38 +16 38 33.1          21.8 VVER124033
         K21R02B 1C2021 09 05.88525 00 13 23.78 +16 38 32.7          21.3 VVER124033
         K21R02B KC2021 09 06.21075500 14 34.28 +16 37 32.0          20.9 VuER124H21
         K21R02B KC2021 09 06.21635000 14 35.46 +16 37 30.8          20.7 VuER124H21
         K21R02B KC2021 09 06.22613800 14 37.51 +16 37 28.9          21.1 VuER124H21
         K21R02B KC2021 09 06.93710 00 17 17.91 +16 34 28.5          20.4 GVER124I93
         K21R02B KC2021 09 06.94109 00 17 18.78 +16 34 28.4          20.6 GVER124I93
         K21R02B KC2021 09 06.94557 00 17 19.74 +16 34 27.2          20.1 GVER124I93
         K21R02B  C2021 09 07.33612800 18 50.30 +16 32 41.8          20.61GVER124G96
         K21R02B  C2021 09 07.34291600 18 51.79 +16 32 39.9          20.39GVER124G96
         K21R02B  C2021 09 07.34856300 18 53.07 +16 32 38.1          21.10GVER124G96
         K21R02B  C2021 09 07.35420300 18 54.33 +16 32 36.0          20.78GVER124G96
    
    Observer details:
    033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
        Hoegner, U. Laux, F. Ludwig, B. Stecklum.  Measurer B. Stecklum.  1.34-m
        f/3 Schmidt + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, I. Smith.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
        Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, I.
        Smith.  Measurers K. Chambers, S. Chastel, T. de Boer, J. Fairlamb, H.
        Gao, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R.
        Weryk.  1.8-m Ritchey-Chretien + CCD.
    G96 Mt. Lemmon Survey.  Observer K. W. Wierzchos.  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.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD.
    I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
    L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
        + CCD.
    
    Orbital elements:
    2021 RB2                                                 Earth MOID = 0.0608 AU
    Epoch 2021 July 5.0 TT = JDT 2459400.5                  Veres                   
    M 339.17736              (2000.0)            P               Q                  
    n   0.17203242     Peri.  235.14894     +0.55179863     -0.83395894             
    a   3.2018122      Node   181.39660     +0.82001008     +0.54375716             
    e   0.7123689      Incl.   13.15245     +0.15199256     +0.09402465             
    P   5.73           H   22.42          G   0.15           U   8                  
    Residuals in seconds of arc
    210905 F52  0.1-  0.0     210905 L01  0.3-  0.2-    210906 I93  0.1-  0.2+
    210905 F52  0.1+  0.1-    210905 033  0.3-  0.1+    210906 I93  0.6-  0.1+
    210905 F52  0.0   0.1+    210905 033  0.1+  0.1+    210907 G96  0.2+  0.0
    210905 F51  0.1+  0.0     210905 033  0.3+  0.0     210907 G96  0.3-  0.2+
    210905 F51  0.1-  0.0     210906 H21  0.1-  0.1+    210907 G96  0.0   0.1+
    210905 L01  0.1+  0.4+    210906 H21  0.0   0.1-    210907 G96  0.1-  0.3-
    210905 L01  0.3+  0.0     210906 H21  0.1-  0.0
    210905 L01  0.1+  0.1-    210906 I93  0.2+  0.7-
    
    Ephemeris:
    2021 RB2                 a,e,i = 3.20, 0.71, 13                  q = 0.9209
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 08 08    23 17 05.3 +14 13 07   0.6179  1.5230   136.5    27.3    23.5
    ...
    2021 08 23    23 38 44.1 +16 09 10   0.4239  1.3779   144.3    25.4    22.4
    ...
    2021 08 31    23 55 39.4 +16 41 27   0.3313  1.3023   148.0    24.3    21.7
    ...
    2021 09 06    00 13 47.3 +16 38 30   0.2671  1.2471   150.3    23.6    21.1
    2021 09 07    00 17 31.1 +16 34 30   0.2569  1.2381   150.6    23.6    21.0
    2021 09 08    00 21 30.7 +16 29 10   0.2468  1.2291   150.9    23.5    20.9
    ...
    2021 09 14    00 52 49.9 +15 18 58   0.1897  1.1764   151.7    23.9    20.3
    ...
    2021 09 22    02 09 09.3 +10 18 50   0.1271  1.1105   145.2    31.1    19.5
    ...
    2021 10 07    06 45 28.7 -14 29 21   0.1164  1.0059    89.8    83.6    20.7
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-R124
    


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