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  • MPEC 2021-A80 : 2021 AR2

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    M.P.E.C. 2021-A80                               Issued 2021 January 8, 20:42 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 AR2                                 
    
    
    Observations:
         K21A02R* C2021 01 08.32338708 14 49.89 +24 35 12.8                VEA080G96
         K21A02R  C2021 01 08.32853308 14 48.97 +24 38 32.1                VEA080G96
         K21A02R  C2021 01 08.33368308 14 48.05 +24 41 49.0          18.10GVEA080G96
         K21A02R KC2021 01 08.39026008 14 38.01 +25 17 11.9          17.94GVEA080I52
         K21A02R KC2021 01 08.39065108 14 37.93 +25 17 26.2          18.13GVEA080I52
         K21A02R KC2021 01 08.39104208 14 37.87 +25 17 40.6          17.80GVEA080I52
         K21A02R KC2021 01 08.39143208 14 37.81 +25 17 54.9          18.00GVEA080I52
         K21A02R KC2021 01 08.46935008 14 26.14 +26 04 08.0          17.65GVEA080I52
         K21A02R KC2021 01 08.46974708 14 26.08 +26 04 21.4          18.12GVEA080I52
         K21A02R KC2021 01 08.47013908 14 26.04 +26 04 35.3          17.90GVEA080I52
         K21A02R KC2021 01 08.47053208 14 26.00 +26 04 48.7          17.96GVEA080I52
         K21A02R  C2021 01 08.58084308 15 02.50 +27 07 44.8          18.2 VqEA080900
         K21A02R  C2021 01 08.58745808 15 01.51 +27 11 27.1          18.2 VqEA080900
         K21A02R KC2021 01 08.81372908 15 13.40 +29 05 53.9          18.4 GVEA080104
         K21A02R KC2021 01 08.81654808 15 13.32 +29 07 18.6          18.1 GVEA080104
         K21A02R KC2021 01 08.82852608 15 12.71 +29 13 16.8          18.4 GVEA080104
    
    Observer details:
    104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers
        P. Bacci, L. Tesi, G. Fagioli.  0.60-m reflector + CCD.
    900 Moriyama.  Observer Y. Ikari.  0.26-m f/7.0 reflector + 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.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. Rankin.  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.  1.0-m reflector +
        CCD.
    
    Orbital elements:
    2021 AR2                                                 Earth MOID = 0.0089 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Pike                    
    M  21.10487              (2000.0)            P               Q                  
    n   0.69479936     Peri.  291.52779     +0.75622409     -0.62716507             
    a   1.2624953      Node   107.81326     +0.64905695     +0.68296773             
    e   0.3345186      Incl.   11.29792     +0.08276590     +0.37445835             
    P   1.42           H   26.18          G   0.15           U   7                  
    Residuals in seconds of arc
    210108 G96  0.0-  0.2-    210108 I52  0.1+  0.3-    210108 900  0.2-  0.3+
    210108 G96  0.0-  0.6+    210108 I52  0.0+  0.2-    210108 104  0.2-  0.0-
    210108 G96  0.0+  0.4-    210108 I52  0.1-  0.5-    210108 104  0.3+  0.0-
    210108 I52  0.1+  0.3-    210108 I52  0.0-  0.1-    210108 104  0.1-  0.0-
    210108 I52  0.0-  0.3-    210108 I52  0.1+  0.3-
    210108 I52  0.1+  0.2-    210108 900  0.1+  0.4+
    
    Ephemeris:
    2021 AR2                 a,e,i = 1.26, 0.33, 11                  q = 0.8402
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2020 12 09    19 57 53.9 -56 58 11   0.1744  0.8739    46.4   125.3    27.4
    ...
    2020 12 24    20 14 24.9 -62 36 47   0.07970 0.9283    44.4   132.2    26.5
    ...
    2021 01 01    20 19 57.4 -73 47 30   0.03137 0.9644    52.3   126.2    23.9
    ...
    2021 01 07    08 14 11.0 +02 35 13   0.01153 0.9938   155.1    24.6    17.6
    2021 01 08    08 14 38.8 +20 47 33   0.01592 0.9988   166.4    13.4    18.0
    2021 01 09    08 14 52.5 +30 35 01   0.02119 1.0039   165.3    14.4    18.6
    ...
    2021 01 15    08 14 40.8 +47 03 15   0.05691 1.0349   153.5    25.1    21.2
    ...
    2021 01 23    08 13 56.0 +50 43 03   0.1073  1.0775   148.8    28.3    22.7
    ...
    2021 02 07    08 15 39.9 +50 37 04   0.2088  1.1585   142.3    31.4    24.4
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-A80
    


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