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  • MPEC 2022-S202 : 2021 RU9

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    M.P.E.C. 2022-S202                           Issued 2022 September 24, 14:12 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 RU9                                 
    
    
                               Revision to MPEC 2021-R265                           
    
    Additional Observations:
         K21R09U  C2006 01 31.37238909 44 48.69 +14 38 21.1                nES202645
         K21R09U  C2006 01 31.37321809 44 48.55 +14 38 20.7                nES202645
         K21R09U  C2006 01 31.37487709 44 48.32 +14 38 20.1                nES202645
         K21R09U  C2006 01 31.37570609 44 48.22 +14 38 19.8                nES202645
         K21R09U  C2013 02 08.49876110 22 41.520+01 06 18.45         22.50GVES202F51
         K21R09U  C2013 02 08.51462910 22 39.615+01 06 16.29         22.61GVES202F51
         K21R09U  C2013 02 08.53050910 22 37.690+01 06 13.15         22.32GVES202F51
         K21R09U KC2013 02 21.41223209 57 31.306+00 45 07.25         22.02GVES202F51
    
    Observer details:
    645 Apache Point-Sloan Digital Sky Survey.  Observer .  Measurers J. A.
        Izquierdo, F. Arias Arias, F. Barnes Sanchez, C. Chacon Suarez, L. Da
        Silva Evora, A. De Dios Cubillas, J. De La Cal Santamarta, J. De Mula Y
        Gonzalez De Riancho, S. De Napoli Cocci, J. Delpech, M. Gambero Hernandez,
        M. Garcia-vino Sanchez, C. Garrido, L. Gonzalez Lorenzo, N. Huelamo
        Bautista, F. J. Benarque Fonseca, E. J. Perez Rodriguez, P. Jordi, J. L.
        Moreno Diaz, J. L. Permuy Palomo, J. M. Pina OrduNa, R. Martin Lopez, P.
        Mir Hosseini, S. Monino Romero, N. Mouchout, S. Munoz Torres, J. Murcia
        Rocha, J. Piraux, D. Pustejovsky Carrillo, J. R. Vidal Blanco, C. Rey
        Rodriguez, M. Rocher, C. Rodrigo, I. Rodriguez Jauregui, E. Solano, M.
        Vazquez Munoz, A. Velasco.  2.50-m reflector + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
        Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc, reference and Delta-T
    060131 645 64.1- 61.5-    130221 F51 26.8- 22.6-    E2022-A85   +0.00 days
    
    Orbital elements:
    2021 RU9                                                 Earth MOID = 0.0990 AU
    Epoch 2022 Aug. 9.0 TT = JDT 2459800.5                  Veres                   
    M 126.60932              (2000.0)            P               Q                  
    n   0.42733875     Peri.   59.80147     +0.91000292     -0.32701938             
    a   1.7456394      Node   317.76279     +0.10269471     +0.77333973             
    e   0.4470066      Incl.   22.28045     +0.40168207     +0.54314270             
    P   2.31           H   20.54          G   0.15           U   0                  
    Residuals in seconds of arc
    060131 645  0.0   0.3+    210910 033  0.1-  0.2+    210929 V06  0.0   0.0
    060131 645  0.2-  0.2+    210910 033  0.0   0.0     210929 V06  0.2-  0.0
    060131 645  0.1+  0.4+    210911 H21  0.8+  0.1+    211017 291  0.2-  0.2+
    060131 645  0.4+  0.4+    210911 H21  0.7+  0.4+    211017 291  0.0   0.1-
    130208 F51  0.4-  0.2-    210911 H21  0.4+  0.2+    211024 G96  0.2-  0.5+
    130208 F51  0.2-  0.4+    210911 033  0.1+  0.0     211024 G96  0.3+  0.1+
    130208 F51  0.2-  0.0     210911 033  0.1-  0.2-    211024 G96  0.1+  0.1-
    130221 F51  0.2-  0.2+    210911 033  0.0   0.1-    211024 291  0.1+  0.5-
    210910 G96  0.0   0.2+    210911 L06  0.5-  0.7-    211024 291  0.3-  0.1-
    210910 G96  0.0   0.0     210911 L06  0.6-  0.2-    211024 291  0.2-  0.7-
    210910 G96  0.0   0.1-    210912 H21  0.0   0.0     211109 T12  0.1-  0.2-
    210910 703  0.9-  0.2+    210912 H21  0.3+  0.2-    220103 858  0.1+  0.1-
    210910 703  0.9-  1.1-    210912 H21  0.3+  0.1-    220103 858  0.1-  0.2-
    210910 L01  0.3-  0.1-    210914 G96  0.0   0.2-    220103 858  0.0   0.1+
    210910 L01  0.0   0.4+    210914 G96  0.0   0.0     220107 I52  0.0   0.4-
    210910 L01  0.3+  0.6+    210914 G96  0.2-  0.2+    220107 I52  0.1+  0.1-
    210910 L01  0.1-  0.1-    210914 G96  0.2+  0.1+
    210910 033  0.1-  0.1-    210929 V06  0.0   0.0
    
    Ephemeris:
    2021 RU9                 a,e,i = 1.75, 0.45, 22                  q = 0.9653
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2022 08 25    10 59 43.5 -04 21 04   3.3349  2.4021    19.1     7.9    25.6
    ...
    2022 09 09    11 22 13.1 -07 21 23   3.4032  2.4340    13.3     5.5    25.6
    ...
    2022 09 17    11 34 09.4 -08 59 12   3.4261  2.4491    11.5     4.7    25.6
    ...
    2022 09 23    11 43 05.5 -10 13 14   3.4369  2.4595    11.1     4.5    25.6
    2022 09 24    11 44 34.8 -10 25 38   3.4382  2.4611    11.1     4.5    25.6
    2022 09 25    11 46 04.0 -10 38 02   3.4393  2.4628    11.1     4.5    25.6
    ...
    2022 10 01    11 54 58.7 -11 52 45   3.4428  2.4721    12.0     4.8    25.6
    ...
    2022 10 09    12 06 49.7 -13 33 02   3.4388  2.4835    14.4     5.7    25.7
    ...
    2022 10 24    12 28 57.5 -16 42 40   3.4052  2.5011    20.9     8.2    25.8
    
    A. U. Tomatic                (C) Copyright 2022 MPC           M.P.E.C. 2022-S202
    


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