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  • MPEC 2023-K83 : 2021 GB6

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    M.P.E.C. 2023-K83                                  Issued 2023 May 21, 14:06 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 GB6                                 
    
    
                               Revision to MPEC 2021-G140                           
    
    Additional Observations:
         K21G06B  C2013 04 20.39370813 05 30.177-21 05 23.63         20.86GVEK083F51
         K21G06B  C2013 04 20.40391213 05 28.790-21 05 11.39         20.62GVEK083F51
         K21G06B 0C2023 05 16.56284522 24 31.333-14 02 23.86         24.33GVEK083T14
         K21G06B 0C2023 05 16.56891722 24 31.962-14 02 20.35         24.13GVEK083T14
         K21G06B 0C2023 05 16.57498522 24 32.588-14 02 16.84         24.29GVEK083T14
    
    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.
    T14 Canada-France-Hawaii Telescope, Maunakea.  Observer A. Acohido.  Measurer
        D. J. Tholen.  3.6-m f/4.1 reflector + 1024 x 2306 pixels Megacam.
    
    First and last observations above in comparison with prediction:
    Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
    130420 F51 0.63- 0.22-    230516 T14 0.07- 0.04-    MPO622449   +0.04 days
    
    Orbital elements:
    2021 GB6                                            PHA, Earth MOID = 0.0044 AU
    Epoch 2023 Feb. 25.0 TT = JDT 2460000.5                 Veres                   
    M 282.08415              (2000.0)            P               Q                  
    n   0.36919079     Peri.  103.95750     +0.16910768     -0.98462955             
    a   1.9244301      Node   336.17296     +0.85739822     +0.16881983             
    e   0.7440458      Incl.    6.20611     +0.48607703     +0.04477192             
    P   2.67           H   20.42          G   0.15           U   1                  
    Residuals in seconds of arc
    130420 F51  0.1-  0.0     210411 J04  0.1-  0.1+    210417 F51  0.2+  0.0
    130420 F51  0.1+  0.0     210411 I52  1.4+  0.2+    210417 F51  0.2+  0.1+
    210409 G96  0.2+  0.2+    210411 I52  0.1-  0.7-    210417 F51  0.2+  0.1+
    210409 G96  0.0   0.1+    210411 I52  0.9-  0.9-    210421 I52  0.0   0.3+
    210409 G96  0.1+  0.0     210411 734  0.3-  0.2+    210421 I52  0.1-  0.1-
    210409 I52  0.3+  0.1+    210411 734  0.3-  0.4+    210421 I52  0.1+  0.3-
    210409 I52  0.1+  0.1+    210411 734  0.1-  0.5+    210421 I52  0.2+  0.1+
    210409 I52  0.2+  0.2+    210411 734  0.3+  0.2+    210422 I52  0.8-  0.7-
    210409 I52  0.1+  0.2-    210411 734  0.2-  0.1+    210422 I52  0.1+  0.1+
    210409 F51  0.2+  0.1+    210413 I52  0.1-  0.3+    210430 807  0.6+  0.4-
    210409 F51  0.2+  0.1+    210413 I52  0.2-  0.1+    210430 807  0.2+  0.1-
    210409 F51  0.1+  0.1+    210413 I52  0.4-  0.2-    210430 807  0.2+  0.1+
    210409 F51  0.1+  0.2+    210413 I52  0.3-  0.2+    210504 I52  0.3-  0.8-
    210410 J04  0.1-  0.7-    210413 691  0.2-  0.1+    210504 I52  0.4+  0.3+
    210410 J04  0.0   0.0     210413 691  0.2-  0.4+    210504 I52  0.0   0.3-
    210410 807  0.1+  0.2-    210413 691  0.4+  0.0     210509 F51  0.2+  0.0
    210410 807  0.2+  0.1-    210414 I52  0.0   0.2+    210509 F51  0.1-  0.1-
    210410 807  0.4+  0.1-    210414 I52  0.0   0.5+    210509 F51  0.1+  0.1-
    210410 I52  0.3+  0.1-    210414 I52  0.3-  0.2+    210509 F51  0.3+  0.0
    210410 I52  0.6-  0.2-    210414 I52  0.1-  0.0     210509 F51  0.2+  0.1-
    210410 654  0.1+  0.2+    210417 I52  0.4+  0.2+    210509 F51  0.1-  0.0
    210410 654  0.1+  0.0     210417 I52  0.2-  0.0     230516 T14  0.1-  0.0
    210410 654  0.1+  0.1-    210417 I52  0.2+  0.1-    230516 T14  0.0   0.0
    210411 J04  0.0   0.6-    210417 F51  0.2+  0.1+    230516 T14  0.0   0.0
    
    Ephemeris:
    2021 GB6                 a,e,i = 1.92, 0.74, 6                   q = 0.4926
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2023 04 21    21 41 46.1 -17 46 08   2.3190  2.1643    68.6    25.6    25.1
    ...
    2023 05 06    22 06 32.3 -15 40 30   2.0162  2.0386    76.8    28.8    24.8
    ...
    2023 05 14    22 20 05.8 -14 27 02   1.8529  1.9677    81.1    30.5    24.5
    ...
    2023 05 20    22 30 30.8 -13 28 21   1.7304  1.9128    84.1    31.7    24.4
    2023 05 21    22 32 16.5 -13 18 14   1.7100  1.9035    84.6    32.0    24.3
    2023 05 22    22 34 02.7 -13 08 01   1.6896  1.8942    85.1    32.2    24.3
    ...
    2023 05 28    22 44 51.8 -12 04 24   1.5678  1.8371    88.0    33.4    24.1
    ...
    2023 06 05    22 59 58.2 -10 32 09   1.4071  1.7584    91.7    35.2    23.8
    ...
    2023 06 20    23 31 43.1 -07 05 46   1.1147  1.6023    97.4    39.0    23.2
    
    A. U. Tomatic                (C) Copyright 2023 MPC           M.P.E.C. 2023-K83
    


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