• MPC Preparation (Info)

    • MPEC 2021-K105 : 2021 HK12

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    Read MPEC 2021-K104 Read MPEC 2021-K106 

    M.P.E.C. 2021-K105                                 Issued 2021 May 31, 18:41 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 HK12                                


Observations:
     K21H12K* C2021 04 17.59029 15 43 36.924+24 01 42.30         22.4 wUEK105F51
     K21H12K  C2021 04 17.59868 15 43 36.580+24 01 51.89         22.4 wUEK105F51
     K21H12K  C2021 04 17.60706 15 43 36.186+24 02 01.41         22.7 wUEK105F51
     K21H12K  C2021 05 29.44812014 59 50.606+33 54 05.30         22.35GVEK105F51
     K21H12K  C2021 05 29.45587814 59 50.052+33 54 08.50         21.77GVEK105F51
     K21H12K  C2021 05 29.46365014 59 49.486+33 54 11.60         21.66GVEK105F51
     K21H12K  C2021 05 29.47140914 59 48.941+33 54 14.69         21.76GVEK105F51
     K21H12K  C2021 05 30.28042114 58 52.76 +33 59 35.0          21.70GVEK105G96
     K21H12K  C2021 05 30.28552714 58 52.42 +33 59 36.7          21.57GVEK105G96
     K21H12K  C2021 05 30.29062714 58 52.03 +33 59 38.0          21.75GVEK105G96
     K21H12K  C2021 05 30.29572614 58 51.64 +33 59 40.6          22.01GVEK105G96
     K21H12K KC2021 05 30.39034114 58 44.93 +34 00 15.9          22.00GVEK105I52
     K21H12K KC2021 05 30.39622814 58 44.47 +34 00 17.1          21.09GVEK105I52
     K21H12K KC2021 05 30.40211514 58 44.12 +34 00 19.7          20.89GVEK105I52
     K21H12K KC2021 05 31.32843714 57 40.28 +34 06 04.9          21.87GVEK105I52
     K21H12K KC2021 05 31.33588214 57 39.75 +34 06 07.3          22.00GVEK105I52
     K21H12K KC2021 05 31.34329014 57 39.38 +34 06 09.0                VEK105I52

Observer details:
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman, K. Chambers, I. Smith.  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.
G96 Mt. Lemmon Survey.  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.  1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station.  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.  1.0-m
    reflector + CCD.

Orbital elements:
2021 HK12                                           PHA, Earth MOID = 0.0418 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Veres                   
M 297.36752              (2000.0)            P               Q                  
n   0.16568857     Peri.  168.76516     +0.98971791     +0.11080472             
a   3.2830262      Node   187.09627     -0.06639450     +0.91599978             
e   0.6843621      Incl.   47.06699     +0.12668947     -0.38557324             
P   5.95           H   17.52          G   0.15           U   7                  
Residuals in seconds of arc
210417 F51  0.0   0.0     210529 F51  0.0   0.0     210530 I52 (0.7-  1.0-)
210417 F51  0.0   0.0     210530 G96  0.2+  0.6+    210530 I52  0.1+  0.5-
210417 F51 (0.5-  0.0 )   210530 G96  0.5+  0.3+    210531 I52  0.1-  0.0
210529 F51  0.0   0.1-    210530 G96  0.2+  0.3-    210531 I52  0.2-  0.1-
210529 F51  0.0   0.0     210530 G96  0.1-  0.4+    210531 I52 (1.7+  1.1-)
210529 F51  0.1-  0.0     210530 I52  0.2-  0.0

Ephemeris:
2021 HK12                a,e,i = 3.28, 0.68, 47                  q = 1.0362
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 05 01    15 32 26.5 +28 04 55   2.0445  2.8435   134.6    14.6    22.2
...
2021 05 16    15 15 53.7 +31 46 02   1.9790  2.7316   129.1    16.7    22.1
...
2021 05 24    15 06 17.9 +33 11 02   1.9639  2.6705   124.4    18.2    22.1
...
2021 05 30    14 59 12.3 +33 57 45   1.9600  2.6242   120.5    19.4    22.1
2021 05 31    14 58 03.1 +34 04 05   1.9598  2.6164   119.8    19.6    22.1
2021 06 01    14 56 54.5 +34 10 01   1.9599  2.6086   119.1    19.8    22.1
...
2021 06 07    14 50 20.6 +34 37 00   1.9628  2.5615   114.9    21.1    22.1
...
2021 06 15    14 42 38.8 +34 50 58   1.9726  2.4980   109.2    22.6    22.1
...
2021 06 30    14 32 42.0 +34 18 38   2.0011  2.3763    98.6    25.0    22.1

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-K105

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