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  • MPEC 2023-V246 : 2021 RW2

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    M.P.E.C. 2023-V246                            Issued 2023 November 14, 14:21 UT
    
         The Minor Planet Electronic Circulars contain information on unusual
             minor planets, routine data on comets and natural satellites,
             and occasional editorial announcements.  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 RW2                                 
    
    
                               Revision to MPEC 2021-R147                           
    
    Additional Observations:
         K21R02W 0C2023 08 12.36133817 27 18.793+39 09 07.84         24.24GVEV246T12
         K21R02W 0C2023 08 14.32523317 27 15.948+38 14 38.59         23.73GVEV246T12
         K21R02W 0C2023 08 14.41332417 27 15.829+38 12 08.65         23.90GVEV246T12
    
    Observer details:
    T12 University of Hawaii 88-inch telescope, Maunakea.  Observers D. J. Tholen,
        D. Hung.  Measurer D. J. Tholen.  2.24-m f/10.1 reflector + 2112 x 2112
        pixels STA1600 10k CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    230812 T12 0.08- 0.02-    230814 T12 0.08- 0.01-    MPO750185   +0.05 days
    
    Orbital elements:
    2021 RW2                                                 Earth MOID = 0.3320 AU
    Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                Veres                   
    M 288.91648              (2000.0)            P               Q                  
    n   0.43547689     Peri.  233.62462     +0.67670754     -0.72715077             
    a   1.7238229      Node   170.68078     +0.65149616     +0.66442014             
    e   0.2868366      Incl.   45.45278     -0.34295721     -0.17261991             
    P   2.26           H   20.62          G   0.15           U   1                  
    Residuals in seconds of arc
    210906 703  0.7+  0.3+    210906 958  0.2+  0.5+    210911 G96  0.1-  0.0
    210906 703  0.1+  0.2-    210906 958  0.4+  0.1+    210911 A17  0.3+  0.6+
    210906 703  0.3+  0.1-    210907 858  0.0   0.0     210911 A17  0.0   0.1-
    210906 703  0.6-  0.5-    210907 858  0.2+  0.1+    210911 A17  0.3+  0.1+
    210906 703  0.6+  0.2+    210907 H21  0.2+  0.1-    210912 G96  0.1-  0.2+
    210906 703  0.2+  0.2-    210907 H21  0.3+  0.0     210912 G96  0.0   0.2+
    210906 703  0.7+  0.3-    210907 H21  0.4+  0.2-    210912 G96  0.4-  0.2-
    210906 N88  0.4+  0.4+    210907 T08  0.4+  0.1+    210912 G96  0.0   0.0
    210906 N88  0.4-  0.6-    210907 T08  0.2-  0.1+    210914 703  1.0+  0.0
    210906 N88  0.1+  0.3-    210907 T08  0.5+  0.8+    210914 703  0.2+  0.2-
    210906 N88  0.1+  0.6-    210907 T08  0.9-  0.3-    210914 703  0.7-  0.4+
    210906 N88  0.2-  0.4-    210907 033  0.1-  0.1-    210917 807  0.4-  0.2-
    210906 246  0.1-  1.0-    210907 033  0.1-  0.2-    210917 807  0.0   0.1+
    210906 246  0.7-  0.3-    210907 033  0.2+  0.2-    210917 807  0.0   0.0
    210906 246  0.4-  0.2-    210907 033  0.0   0.2-    210923 F51 (0.0   0.5+)
    210906 033  0.3-  0.3-    210907 G15  0.4+  0.1-    210923 F51  0.1+  0.0
    210906 033  0.4-  0.6-    210907 246  0.7+  0.1-    210923 F51  0.1-  0.1+
    210906 104  0.7-  0.1-    210907 246  0.2+  0.2+    210924 807  0.2+  0.6-
    210906 104  0.3-  0.2+    210907 246  0.3+  0.2-    210924 807  0.3-  0.2+
    210906 104  0.0   0.1-    210907 G15  0.1+  0.3-    210924 807  0.4-  0.5-
    210906 L01  0.4-  0.2-    210907 G15  0.2-  1.1-    210928 807  0.4-  0.3+
    210906 L01  0.3+  0.1+    210908 K87  0.2-  0.0     210928 807  0.2-  0.1-
    210906 L01  0.3+  0.2+    210908 K87  0.1+  0.6-    210928 807  0.4-  0.1+
    210906 L01  0.1-  0.2+    210908 K87  0.6+  0.6-    211017 807  0.0   0.4-
    210906 L01  0.2-  0.1+    210909 K88  0.3+  0.2-    211017 807  0.1+  0.2-
    210906 I93  0.0   0.1-    210909 K88  0.0   0.1+    211017 807  0.0   0.2-
    210906 J04  0.1-  0.2-    210909 F52  0.0   0.1+    211112 807  0.1-  0.0
    210906 J04  0.4+  0.2-    210909 F52  0.0   0.1+    211112 807  0.1+  0.0
    210906 I93  0.0   0.5+    210911 703  0.7-  0.3-    211112 807  0.2+  0.6+
    210906 J04  0.1+  0.5+    210911 703  0.9+  0.5-    211125 807  0.1-  0.0
    210906 I93  0.2+  0.3+    210911 G96  0.0   0.1+    211125 807  0.1+  0.1+
    210906 K83  0.9+  0.3-    210911 703  0.5-  0.4+    211125 807  0.2+  0.0
    210906 K83  0.8+  0.2-    210911 G96  0.1+  0.0     230812 T12  0.0   0.0
    210906 K83  1.0+  0.4+    210911 703  0.3+  0.7+    230814 T12  0.0   0.0
    210906 958  0.1-  0.9+    210911 G96  0.0   0.1+    230814 T12  0.0   0.0
    
    Ephemeris:
    2021 RW2                 a,e,i = 1.72, 0.29, 45                  q = 1.2294
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 10 15    18 37 29.4 +05 09 32   1.3924  1.5781    80.8    38.6    23.9
    ...
    2023 10 30    19 09 43.8 -01 51 18   1.4601  1.5194    73.8    38.9    23.9
    ...
    2023 11 07    19 28 33.8 -05 09 00   1.5007  1.4886    70.0    38.7    23.9
    ...
    2023 11 13    19 43 21.4 -07 24 03   1.5325  1.4658    67.1    38.5    23.9
    2023 11 14    19 45 52.5 -07 45 25   1.5378  1.4620    66.6    38.4    23.9
    2023 11 15    19 48 24.4 -08 06 28   1.5432  1.4583    66.2    38.4    23.9
    ...
    2023 11 21    20 03 53.6 -10 05 56   1.5756  1.4360    63.3    37.9    23.9
    ...
    2023 11 29    20 25 15.2 -12 27 04   1.6185  1.4072    59.7    37.2    23.9
    ...
    2023 12 14    21 07 14.6 -15 57 08   1.6951  1.3565    53.1    35.5    23.9
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-V246
    


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