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    • MPEC 2021-A106 : 2021 AK3

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    M.P.E.C. 2021-A106                             Issued 2021 January 10, 03:57 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 AK3                                 


Observations:
     K21A03K* C2021 01 07.40757506 00 10.818-14 14 04.17         21.31wUEA106F52
     K21A03K  C2021 01 07.41905906 00 08.476-14 14 34.38         21.20wUEA106F52
     K21A03K  C2021 01 07.43054206 00 06.118-14 15 04.68         20.95wUEA106F52
     K21A03K KC2021 01 08.18747505 57 38.19 -14 48 28.1          21.51GVEA106I52
     K21A03K KC2021 01 08.19083405 57 37.56 -14 48 36.8          21.76GVEA106I52
     K21A03K KC2021 01 08.19419405 57 36.87 -14 48 44.9          20.41GVEA106I52
     K21A03K KC2021 01 08.19755505 57 36.22 -14 48 54.0          20.54GVEA106I52
     K21A03K  C2021 01 09.23805 05 54 09.41 -15 34 10.6                oEA106711
     K21A03K  C2021 01 09.24170 05 54 08.57 -15 34 21.1                oEA106711
     K21A03K  C2021 01 09.24533 05 54 07.88 -15 34 29.4                oEA106711
     K21A03K KC2021 01 09.52556005 53 11.82 -15 46 07.1          20.9 GVEA106474
     K21A03K KC2021 01 09.52925405 53 10.97 -15 46 15.1          21.1 GVEA106474
     K21A03K KC2021 01 09.53266405 53 10.31 -15 46 24.5          21.0 GVEA106474
     K21A03K KC2021 01 09.53674605 53 09.47 -15 46 35.8          20.9 GVEA106474

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.
711 McDonald Observatory, Fort Davis.  Observers J. G. Ries, B. P. Roman.
    Measurer J. G. Ries.  2.1-m reflector + CCD + focal reducer.
F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, T. Dukes, T. Lowe, A.
    Schultz, M. Willman.  Measurers K. Chambers, S. Chastel, T. de Boer, L.
    Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
    Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + 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 AK3                                                 Earth MOID = 0.1723 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
M 287.90078              (2000.0)            P               Q                  
n   0.61834207     Peri.  325.25678     -0.79332795     +0.53114524             
a   1.3645314      Node   249.56224     -0.46134142     -0.84337256             
e   0.4388269      Incl.   18.51190     -0.39723400     -0.08128628             
P   1.59           H   21.46          G   0.15           U   9                  
Residuals in seconds of arc
210107 F52  0.1-  0.2-    210108 I52 (0.9-  0.7-)   210109 711  0.4-  0.3+
210107 F52  0.1-  0.2-    210108 I52  0.1-  0.5-    210109 474  0.5+  0.3-
210107 F52  0.1+  0.0+    210108 I52  0.2-  0.3+    210109 474 (0.7-  1.2+)
210107 F52  0.1+  0.0+    210108 I52  0.4+  0.0+    210109 474  0.1-  0.6+
210107 F52  0.0+  0.1+    210109 711  0.1-  0.2+    210109 474  0.1-  0.2-
210107 F52  0.0+  0.1+    210109 711  1.3-  0.8-

Ephemeris:
2021 AK3                 a,e,i = 1.36, 0.44, 19                  q = 0.7657
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2020 12 11    07 05 38.6 +05 17 44   0.5452  1.4740   147.5    21.0    22.0
...
2020 12 26    06 36 43.5 -04 50 16   0.4357  1.3820   151.5    19.9    21.4
...
2021 01 03    06 14 10.5 -10 55 06   0.3996  1.3300   144.8    25.2    21.2
...
2021 01 09    05 54 57.0 -15 23 34   0.3825  1.2897   137.0    31.3    21.3
2021 01 10    05 51 37.6 -16 06 36   0.3805  1.2829   135.5    32.5    21.3
2021 01 11    05 48 17.0 -16 48 59   0.3786  1.2761   134.1    33.6    21.3
...
2021 01 17    05 28 05.9 -20 46 32   0.3711  1.2347   125.0    40.7    21.4
...
2021 01 25    05 02 09.4 -25 12 08   0.3685  1.1783   113.0    50.3    21.5
...
2021 02 09    04 20 21.3 -31 11 07   0.3719  1.0708    92.7    67.0    21.8

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-A106

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