• Processing (Info)

    • MPEC 2021-A132 : 2021 AM4

    The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.

    A form allowing access to any MPEC is at the bottom of this page.

    Read MPEC 2021-A131 Read MPEC 2021-A133 

    M.P.E.C. 2021-A132                             Issued 2021 January 11, 10:38 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 AM4                                 


Observations:
     K21A04M* C2021 01 10.40200909 44 01.67 +11 18 09.2          20.55GVEA132G96
     K21A04M  C2021 01 10.40716909 44 00.35 +11 17 40.5          21.01GVEA132G96
     K21A04M  C2021 01 10.41232409 43 59.07 +11 17 11.7          20.35GVEA132G96
     K21A04M  C2021 01 10.41747809 43 57.77 +11 16 43.0          20.52GVEA132G96
     K21A04M KC2021 01 10.49145909 43 39.51 +11 09 48.1          20.86GVEA132I52
     K21A04M KC2021 01 10.49272409 43 39.19 +11 09 41.2          20.80GVEA132I52
     K21A04M KC2021 01 10.49399109 43 38.92 +11 09 33.5          20.54GVEA132I52
     K21A04M KC2021 01 10.49525309 43 38.61 +11 09 26.9          20.51GVEA132I52
     K21A04M bC2021 01 10.96115509 42 47.45 +10 28 44.2          21.1 GVEA132L01
     K21A04M bC2021 01 10.96463509 42 46.69 +10 28 27.2          21.1 GVEA132L01
     K21A04M bC2021 01 10.97161209 42 45.33 +10 27 54.7          21.0 GVEA132L01
     K21A04M bC2021 01 10.97499909 42 44.62 +10 27 38.7          21.1 GVEA132L01
     K21A04M KC2021 01 11.31937609 42 00.64 +10 02 02.1          20.85GVEA132V06
     K21A04M KC2021 01 11.32160009 42 00.12 +10 01 51.7                VEA132V06
     K21A04M KC2021 01 11.32382109 41 59.72 +10 01 42.9          21.09GVEA132V06
     K21A04M KC2021 01 11.32604309 41 59.30 +10 01 33.5          20.98GVEA132V06

Observer details:
G96 Mt. Lemmon Survey.  Observer H. Groeller.  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 T. A. Pruyne.
    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.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
V06 Catalina Sky Survey-Kuiper.  Observer T. A. Pruyne.  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 AM4                                                 Earth MOID = 0.0066 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
M   3.03695              (2000.0)            P               Q                  
n   0.46341495     Peri.  142.92393     +0.28876972     -0.95616642             
a   1.6538243      Node   290.24638     +0.86551798     +0.28240115             
e   0.4281531      Incl.    2.96669     +0.40925624     +0.07742983             
P   2.13           H   27.07          G   0.15           U   8                  
Residuals in seconds of arc
210110 G96  0.1-  0.2-    210110 I52  0.1+  0.5-    210111 V06  0.1+  0.0-
210110 G96  0.2-  0.0+    210110 I52  0.1-  0.0+    210111 V06 (0.9-  0.9-)
210110 G96  0.2+  0.0+    210110 L01  0.2+  0.5+    210111 V06  0.1-  0.1-
210110 G96  0.4+  0.2+    210110 L01  0.7-  0.1-    210111 V06  0.4+  0.0+
210110 I52  0.0-  0.0-    210110 L01  0.1-  0.1+
210110 I52  0.3-  0.2+    210110 L01  0.4-  0.1+

Ephemeris:
2021 AM4                 a,e,i = 1.65, 0.43, 3                   q = 0.9457
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 12 12    21 17 26.8 +02 09 44   0.09604 0.9459    63.7   111.1    26.1
...
2020 12 27    21 12 52.4 +10 58 47   0.03204 0.9648    53.8   124.7    24.7
...
2021 01 04    11 45 46.6 +58 11 30   0.0074980.9869   118.8    60.9    18.6
...
2021 01 10    09 45 06.3 +11 59 40   0.02997 1.0082   145.2    33.9    20.9
2021 01 11    09 42 35.1 +10 28 13   0.03422 1.0121   146.2    32.7    21.1
2021 01 12    09 40 33.3 +09 17 33   0.03850 1.0160   147.1    31.7    21.4
...
2021 01 18    09 32 59.3 +05 42 27   0.06475 1.0419   152.9    25.5    22.4
...
2021 01 26    09 27 03.9 +04 18 29   0.1016  1.0808   160.5    17.7    23.2
...
2021 02 10    09 20 09.0 +04 24 14   0.1796  1.1638   169.4     9.0    24.3

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-A132

    Read MPEC 2021-A131 Read MPEC 2021-A133

    MPEC number:

    Enter an MPEC number in one of the following forms:

    • 1997-B01 (the full form)
    • J97B01 (the packed version of the full form)
    • B01 (the abbreviated form)