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  • MPEC 2021-E84 : 2021 ER2

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    M.P.E.C. 2021-E84                                 Issued 2021 March 8, 23:53 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 ER2                                 
    
    
    Observations:
         K21E02R* C2021 03 07.40990612 45 41.76 +02 31 02.9          20.94GVEE084G96
         K21E02R  C2021 03 07.41505212 45 39.43 +02 29 41.7          21.17GVEE084G96
         K21E02R  C2021 03 07.42018812 45 37.13 +02 28 21.6          21.20GVEE084G96
         K21E02R  C2021 03 07.42534312 45 34.78 +02 26 59.2          21.46GVEE084G96
         K21E02R KC2021 03 07.50662712 44 58.38 +02 05 29.3          20.80GVEE084G96
         K21E02R KC2021 03 07.50942812 44 57.12 +02 04 44.0          20.61GVEE084G96
         K21E02R KC2021 03 07.51064612 44 56.55 +02 04 24.8          20.70GVEE084G96
         K21E02R pC2021 03 08.05321412 41 08.96 -00 23 05.5          21.0 GVEE084L01
         K21E02R pC2021 03 08.05528912 41 08.00 -00 23 40.3          21.1 GVEE084L01
         K21E02R pC2021 03 08.05736612 41 07.04 -00 24 14.2          21.3 GVEE084L01
         K21E02R KC2021 03 08.05985212 41 05.82 -00 24 55.2          21.1 GVEE084L01
         K21E02R KC2021 03 08.33955312 39 02.06 -01 43 09.3          21.3 VuEE084H21
         K21E02R KC2021 03 08.34799112 38 57.96 -01 45 32.6          20.9 VuEE084H21
         K21E02R KC2021 03 08.54849812 37 30.21 -02 40 10.8          20.9 GVEE084474
         K21E02R KC2021 03 08.55035412 37 29.29 -02 40 43.2          20.4 GVEE084474
         K21E02R KC2021 03 08.55221012 37 28.36 -02 41 15.1          20.7 GVEE084474
         K21E02R KC2021 03 08.55406612 37 27.46 -02 41 47.0          20.8 GVEE084474
         K21E02R KC2021 03 08.93665312 34 31.59 -04 35 47.3          20.6 GVEE084L01
         K21E02R KC2021 03 08.93907712 34 30.38 -04 36 30.5          20.9 GVEE084L01
         K21E02R KC2021 03 08.94147512 34 29.20 -04 37 12.8          20.6 GVEE084L01
    
    Observer details:
    474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M.
        Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
    G96 Mt. Lemmon Survey.  Observer G. J. Leonard.  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.
    H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
        Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.76-m f/3.0
        astrograph + CCD.
    L01 Visnjan Observatory, Tican.  Observers K. Korlevic, D. Pujagic, V. Dobos.
        Measurers K. Korlevic, D. Pujagic.  1.0-m f/2.9 reflector + CCD.
    
    Orbital elements:
    2021 ER2                                                 Earth MOID = 0.0671 AU
    Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres
    M 281.82182              (2000.0)            P               Q
    n   0.67554319     Peri.  214.16832     -0.90722199     +0.41495445
    a   1.2863741      Node   349.63346     -0.24586217     -0.65616667
    e   0.1967771      Incl.   22.54778     -0.34132104     -0.63028414
    P   1.46           H   25.6           G   0.15           U   7
    Residuals in seconds of arc
    210307 G96  0.1-  0.3-    210308 L01  0.2-  0.1-    210308 474  0.2+  0.1-
    210307 G96  0.2-  0.2-    210308 L01  0.0   0.4-    210308 474  0.2-  0.0
    210307 G96  0.1+  0.8+    210308 L01  0.3+  0.2+    210308 474  0.0   0.1+
    210307 G96  0.2-  0.0     210308 L01  0.5-  0.5+    210308 L01  0.2-  0.1+
    210307 G96  0.5+  0.3+    210308 H21  0.1+  0.1-    210308 L01  0.1-  0.2-
    210307 G96  0.3+  0.4-    210308 H21  0.1-  0.1-    210308 L01  0.2+  0.0
    210307 G96  0.2-  0.2-    210308 474  0.3+  0.3+
    
    Ephemeris:
    2021 ER2                 a,e,i = 1.29, 0.20, 23                  q = 1.0332
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
    2021 02 06    13 47 27.2 +44 02 38   0.2672  1.1330   117.1    50.8    24.9
    ...
    2021 02 21    13 40 10.7 +35 24 59   0.1612  1.0953   127.9    45.5    23.6
    ...
    2021 03 01    13 19 09.8 +23 17 09   0.1102  1.0780   140.4    35.8    22.4
    ...
    2021 03 07    12 48 29.3 +04 18 05   0.08110 1.0665   155.4    22.8    21.4
    2021 03 08    12 41 33.3 -00 06 49   0.07777 1.0648   157.4    21.0    21.2
    2021 03 09    12 33 59.2 -04 52 46   0.07506 1.0631   158.6    19.9    21.1
    ...
    2021 03 15    11 33 05.6 -36 00 41   0.07414 1.0536   141.7    35.8    21.5
    ...
    2021 03 23    09 34 06.4 -60 24 48   0.1063  1.0437   113.6    61.1    23.0
    ...
    2021 04 07    06 42 59.7 -67 08 29   0.1947  1.0338    94.2    74.9    24.7
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-E84
    


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