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    • MPEC 2021-L28 : 2021 KJ3

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    M.P.E.C. 2021-L28                                  Issued 2021 June 3, 04:22 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 KJ3                                 


Observations:
     K21K03J* C2021 05 31.28214414 05 19.400-06 29 51.37         21.29wUEL028F51
     K21K03J  C2021 05 31.30604414 05 25.617-06 30 28.33         21.22wUEL028F51
     K21K03J  C2021 05 31.31801714 05 28.724-06 30 46.53         21.38wUEL028F51
     K21K03J  C2021 05 31.41013714 05 52.483-06 33 05.80         20.92GVEL028F51
     K21K03J  C2021 05 31.41077914 05 52.648-06 33 06.74         21.34GVEL028F51
     K21K03J  C2021 05 31.41151214 05 52.839-06 33 07.88         20.86GVEL028F51
     K21K03J  C2021 05 31.41215514 05 53.009-06 33 08.71         21.08GVEL028F51
     K21K03J |C2021 06 01.05384 14 08 44.00 -06 48 02.3          21.2 GVEL028807
     K21K03J |C2021 06 01.05753 14 08 44.88 -06 48 07.4          21.4 GVEL028807
     K21K03J KC2021 06 01.19235714 09 18.33 -06 51 58.9          21.15GVEL028I52
     K21K03J KC2021 06 01.19656714 09 19.32 -06 52 04.5          21.11GVEL028I52
     K21K03J KC2021 06 01.20497414 09 21.25 -06 52 16.0          21.18GVEL028I52
     K21K03J KC2021 06 02.90821214 15 48.22 -07 26 59.7          21.2 GXEL028Y00
     K21K03J KC2021 06 02.92650514 15 51.77 -07 27 20.7          20.8 GXEL028Y00
     K21K03J KC2021 06 02.94410914 15 55.06 -07 27 38.1          20.8 GXEL028Y00

Observer details:
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
    Horn.  1.00-m f/10.0 astrograph + CCD.
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.
I52 Steward Observatory, Mt. Lemmon Station.  Observer 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.  1.0-m
    reflector + CCD.
Y00 SONEAR Observatory, Oliveira.  Observers C. Jacques, E. Pimentel, J.
    Barros.  Measurer C. Jacques.  0.45-m f/2.9 reflector + CCD.

Orbital elements:
2021 KJ3                                                 Earth MOID = 0.0021 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5                 Bell                    
M 307.54516              (2000.0)            P               Q                  
n   0.50955432     Peri.  253.32876     -0.59519414     -0.80036204             
a   1.5524194      Node   233.41811     +0.76716664     -0.53932885             
e   0.6994898      Incl.    5.13454     +0.23916373     -0.26181101             
P   1.93           H   23.13          G   0.15           U   9                  
Residuals in seconds of arc
210531 F51  0.0   0.1+    210531 F51  0.0   0.0     210601 I52  0.1+  0.1+
210531 F51  0.0   0.1-    210531 F51  0.0   0.1+    210601 I52  0.3-  0.1+
210531 F51  0.1+  0.0     210601 807  0.0   0.1-    210602 Y00  0.6+  0.5-
210531 F51  0.0   0.0     210601 807  0.1+  0.0     210602 Y00  0.7+  0.4-
210531 F51  0.0   0.1+    210601 I52  0.1-  0.2-    210602 Y00  0.6-  2.4+

Ephemeris:
2021 KJ3                 a,e,i = 1.55, 0.70, 5                   q = 0.4665
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase     V
2021 05 04    03 59 26.7 +15 22 34   0.2045  0.8165    18.2   157.4    29.4
...
2021 05 19    10 12 03.5 +13 56 59   0.05300 1.0149    92.0    85.0    19.8
...
2021 05 27    13 37 48.0 -03 56 24   0.1327  1.1155   138.1    37.3    20.5
...
2021 06 02    14 12 30.0 -07 09 07   0.2126  1.1881   141.6    32.0    21.5
2021 06 03    14 16 05.2 -07 28 52   0.2264  1.2000   141.6    31.7    21.6
2021 06 04    14 19 19.6 -07 46 41   0.2403  1.2117   141.5    31.4    21.8
...
2021 06 10    14 33 58.8 -09 07 45   0.3257  1.2810   139.7    30.9    22.6
...
2021 06 18    14 47 11.1 -10 22 00   0.4447  1.3695   135.6    31.3    23.4
...
2021 07 03    15 06 03.3 -12 07 28   0.6830  1.5241   126.3    32.5    24.6

M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-L28

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