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  • MPEC 2023-F17 : 2021 RM12

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    M.P.E.C. 2023-F17                                Issued 2023 March 16, 15:05 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 RM12                                
    
    
                               Revision to MPEC 2021-R294                           
    
    Additional Observations:
         K21R12M  C2017 10 29.48921703 49 55.128+07 02 15.29         22.68GVEF017F51
         K21R12M  C2017 10 29.50199103 49 53.924+07 02 08.32         23.21GVEF017F51
         K21R12M  C2017 10 29.51454203 49 52.785+07 02 01.12         22.75GVEF017F51
         K21R12M  C2017 11 13.40157103 26 36.828+05 00 52.13         23.62GVEF017F51
         K21R12M  C2017 11 13.41421503 26 35.589+05 00 47.18         22.84GVEF017F51
         K21R12M KC2019 06 11.58861700 28 43.757+08 50 35.59         23.03GVEF017F51
         K21R12M  C2019 09 24.48385603 20 50.276+09 22 00.92         22.26GVEF017F51
         K21R12M  C2019 09 24.49622803 20 49.804+09 21 52.17         22.56GVEF017F51
         K21R12M  C2019 09 24.50863403 20 49.361+09 21 43.40         22.55GVEF017F51
         K21R12M  C2019 09 24.52109503 20 48.890+09 21 34.52         22.86GVEF017F51
         K21R12M  C2019 10 24.43711002 44 41.846+02 59 29.29         22.67GVEF017F51
         K21R12M  C2019 10 24.44098702 44 41.448+02 59 26.59         22.90GVEF017F51
         K21R12M  C2019 10 24.44843502 44 40.710+02 59 21.68         22.38GVEF017F51
         K21R12M  C2019 10 24.45231802 44 40.317+02 59 19.07         22.61GVEF017F51
         K21R12M  C2019 10 24.45984002 44 39.570+02 59 13.89         22.39GVEF017F51
         K21R12M  C2019 10 24.46382702 44 39.167+02 59 11.02         22.65GVEF017F51
         K21R12M  C2019 10 24.47520302 44 38.020+02 59 03.21         21.83GVEF017F51
         K21R12M  C2019 10 25.43797202 43 05.842+02 48 10.41         22.65GVEF017F51
         K21R12M  C2019 10 25.45004302 43 04.625+02 48 02.18         22.91GVEF017F51
         K21R12M  C2019 10 25.46214902 43 03.407+02 47 54.18         23.16GVEF017F51
         K21R12M KC2019 10 31.41394402 33 38.023+01 46 38.78         23.11GVEF017F52
         K21R12M  C2019 11 04.40857902 27 34.626+01 12 08.88         22.46GVEF017F51
         K21R12M  C2019 11 04.43269502 27 32.394+01 11 57.04         22.70GVEF017F51
         K21R12M  C2023 03 16.52443913 58 56.893-04 36 40.05         21.72wUEF017F52
         K21R12M  C2023 03 16.53605613 58 57.478-04 36 29.87         21.90wUEF017F52
         K21R12M  C2023 03 16.55933613 58 58.633-04 36 10.05         20.49wUEF017F52
    
    Observer details:
    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.
    F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
        Lowe, A. Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M. Huber,
        Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, H. Gao,
        C.-C. Lin, E. Magnier.  1.8-m Ritchey-Chretien + CCD.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    171029 F51 0.11+ 0.03+    230316 F52 0.18+ 0.05+    MPO660780   -0.10 days
    
    Orbital elements:
    2021 RM12                                                Earth MOID = 0.1167 AU
    Epoch 2023 Feb. 25.0 TT = JDT 2460000.5                 Veres                   
    M 301.48936              (2000.0)            P               Q                  
    n   0.47612111     Peri.  107.37997     +0.07879837     +0.99649260             
    a   1.6242683      Node   167.04212     -0.95567579     +0.08355046             
    e   0.3506619      Incl.    7.21592     -0.28368046     -0.00467130             
    P   2.07           H   21.62          G   0.15           U   1                  
    Residuals in seconds of arc
    171029 F51  0.1+  0.0     191025 F51  0.0   0.0     210912 291  0.1+  0.1-
    171029 F51  0.3-  0.2+    191025 F51  0.1-  0.1-    210913 033  0.5+  0.4+
    171029 F51  0.1-  0.0     191025 F51  0.1-  0.0     210913 033  0.3+  0.3+
    171113 F51  0.3+  0.2+    191031 F52  0.2+  0.0     210913 033  0.0   0.2-
    171113 F51  0.3+  0.3+    191104 F51  0.1+  0.2-    210913 291  0.2-  0.3+
    190611 F51  0.1-  0.1+    191104 F51  0.1+  0.6-    210913 291  0.1+  0.2+
    190924 F51  0.2-  0.0     210909 G96  0.0   0.2-    210913 291  0.0   0.0
    190924 F51  0.4-  0.0     210909 G96  0.8-  0.6-    210929 691  0.4+  0.2-
    190924 F51  0.1-  0.0     210909 G96  0.1+  0.1-    210929 691  1.0-  0.2-
    190924 F51  0.1-  0.0     210910 F51  0.1+  0.1-    210929 691  0.4+  0.1+
    191024 F51  0.0   0.0     210910 F51  0.1+  0.0     211005 F51  0.1+  0.1+
    191024 F51  0.1-  0.1-    210910 F51  0.1+  0.0     211005 F51  0.1-  0.0
    191024 F51  0.0   0.1+    210910 F51  0.1+  0.1+    211005 F51  0.0   0.1+
    191024 F51  0.0   0.2+    210910 F51  0.1+  0.1+    230316 F52  0.1-  0.0
    191024 F51  0.1+  0.2+    210910 F51  0.1+  0.1-    230316 F52  0.0   0.2-
    191024 F51  0.1+  0.0     210912 291  0.0   0.2-    230316 F52  0.1-  1.2-
    191024 F51  0.0   0.0     210912 291  0.2+  0.1-
    
    Ephemeris:
    2021 RM12                a,e,i = 1.62, 0.35, 7                   q = 1.0547
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 02 14    13 22 28.8 -07 55 00   0.7894  1.5620   122.7    32.1    23.4
    ...
    2023 03 01    13 42 03.2 -07 13 34   0.6209  1.4876   133.5    28.9    22.7
    ...
    2023 03 09    13 51 15.2 -06 10 04   0.5408  1.4473   139.5    26.4    22.3
    ...
    2023 03 15    13 57 28.3 -04 58 28   0.4857  1.4170   144.2    24.2    21.9
    2023 03 16    13 58 26.6 -04 44 16   0.4769  1.4119   145.0    23.8    21.9
    2023 03 17    13 59 23.8 -04 29 23   0.4683  1.4069   145.8    23.4    21.8
    ...
    2023 03 23    14 04 42.1 -02 44 53   0.4192  1.3766   150.4    20.9    21.5
    ...
    2023 03 31    14 10 40.2 +00 18 15   0.3612  1.3366   155.9    17.8    21.0
    ...
    2023 04 15    14 18 51.5 +08 27 25   0.2761  1.2638   158.4    17.0    20.2
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-F17
    


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