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  • MPEC 2021-U233 : 2021 UM5

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    M.P.E.C. 2021-U233                             Issued 2021 October 31, 07:50 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 UM5                                 
    
    
    Observations:
         K21U05M* C2021 10 28.27529902 18 57.63 +10 38 45.1          21.46GVEU233G96
         K21U05M  C2021 10 28.28043902 18 56.94 +10 38 43.8                VEU233G96
         K21U05M  C2021 10 28.28560002 18 56.19 +10 38 43.5          21.98GVEU233G96
         K21U05M  C2021 10 28.29072702 18 55.57 +10 38 42.8          21.64GVEU233G96
         K21U05M KC2021 10 28.38005702 18 43.63 +10 38 26.1          21.53GVEU233V06
         K21U05M KC2021 10 28.38324002 18 43.28 +10 38 26.3          21.69GVEU233V06
         K21U05M KC2021 10 29.42330 02 16 27.00 +10 35 18.6          21.8 RoEU233691
         K21U05M KC2021 10 29.43487 02 16 25.45 +10 35 16.1          22.3 RoEU233691
         K21U05M KC2021 10 29.44644 02 16 23.89 +10 35 14.0          22.2 RoEU233691
         K21U05M |C2021 10 30.16684 02 14 47.97 +10 33 14.4          21.7 GVEU233807
         K21U05M |C2021 10 30.17238 02 14 47.21 +10 33 13.2          21.8 GVEU233807
         K21U05M |C2021 10 30.17792 02 14 46.43 +10 33 12.3          21.8 GVEU233807
         K21U05M KC2021 10 31.18955302 12 28.07 +10 29 47.8          21.78GVEU233I52
         K21U05M KC2021 10 31.20029802 12 26.55 +10 29 45.8          21.69GVEU233I52
    
    Observer details:
    691 Steward Observatory, Kitt Peak-Spacewatch.  Observer M. J. Brucker.  0.9-m
        f/3 reflector + CCD.
    807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
        Horn.  1.00-m f/10.0 astrograph + CCD.
    G96 Mt. Lemmon Survey.  Observer D. C. Fuls.  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, D. Rankin, R. L. Seaman, F. C.
        Shelly, K. W. Wierzchos.  1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  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, D.
        Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos.
    V06 Catalina Sky Survey-Kuiper.  Observers K. W. Wierzchos, R. A. Kowalski.
        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.  1.55-m
        reflector + 1K CCD.
    
    Orbital elements:
    2021 UM5                                            PHA, Earth MOID = 0.0118 AU
    Epoch 2021 July 5.0 TT = JDT 2459400.5                  Bell                    
    M 291.74853              (2000.0)            P               Q                  
    n   0.30080371     Peri.  108.93130     -0.87063079     -0.47833697             
    a   2.2060427      Node    42.69910     +0.36299580     -0.78227136             
    e   0.6805278      Incl.    9.75247     +0.33201818     -0.39905546             
    P   3.28           H   21.49          G   0.15           U   9                  
    Residuals in seconds of arc
    211028 G96  0.2+  0.1-    211028 V06  0.5+  0.5+    211030 807  0.1+  0.1-
    211028 G96  0.1+  0.4-    211029 691  0.4-  0.2+    211030 807  0.1+  0.0
    211028 G96  0.7-  0.2+    211029 691  0.1-  0.1-    211031 I52  0.1-  0.0
    211028 G96  0.2+  0.4+    211029 691  0.1+  0.1+    211031 I52  0.1+  0.0
    211028 V06  0.6-  0.3-    211030 807  0.1-  0.0
    
    Ephemeris:
    2021 UM5                 a,e,i = 2.21, 0.68, 10                  q = 0.7048
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 10 01    02 54 16.7 +11 22 04   1.0560  1.9506   142.9    18.0    24.0
    ...
    2021 10 16    02 40 27.9 +11 07 42   0.8438  1.8154   160.9    10.4    23.1
    ...
    2021 10 24    02 27 32.6 +10 50 35   0.7502  1.7404   171.6     4.8    22.5
    ...
    2021 10 30    02 15 10.5 +10 33 37   0.6903  1.6828   176.9     1.9    22.0
    2021 10 31    02 12 54.0 +10 30 29   0.6812  1.6731   176.0     2.4    22.0
    2021 11 01    02 10 34.1 +10 27 17   0.6724  1.6634   174.9     3.1    22.0
    ...
    2021 11 07    01 55 28.6 +10 06 50   0.6250  1.6044   165.8     8.7    22.1
    ...
    2021 11 15    01 33 15.2 +09 39 06   0.5762  1.5240   152.6    17.4    22.1
    ...
    2021 11 30    00 51 03.2 +09 05 36   0.5222  1.3685   127.5    34.9    22.2
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-U233
    


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