[Iaude] MPEC M26: COMET P/2020 K9 (Lemmon-PANSTARRS)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Thu Jun 18 15:52:44 EDT 2020


M.P.E.C. 2020-M26                                 Issued 2020 June 18, 19:41 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 at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                       COMET P/2020 K9 (Lemmon-PANSTARRS)                       

     This object was initially reported by the Mount Lemmon Survey (G96) on
May 22 UT as part of their incidental astrometry.  It was independently reported
on May 26 by Pan-STARRS 1 (F51) as an NEO candidate.  On June 16, G. V. Williams
communicated that he was able to link the G96 and F51 tracklets, along with
that of an object submitted by ATLAS (T05) on May 29 also as an NEO candidate.
None of the tracklets met the minimum requirements to appear on the NEOCP, but
Williams was able to compute a possible comet-like orbit and the object was then
listed on the PCCP.  In a set of 12-stacked 60 second images taken on June 16
from iTelescope (Q62), H. Sato noted the object was strongly condensed with an
asymmetrical coma.  R. Weryk examined images taken by the Canada-France-Hawaii
Telescope (568) on June 17, and reported that the object was clearly cometary
in appearance with a FWHM of 1".83 +/- 0".02 versus that of neighboring stars
(0".93 +/- 0".04).

Observations:
    PK20K090* C2020 05 22.43234 21 34 47.09 +02 38 13.0          20.5 GVEM026G96
    PK20K090  C2020 05 22.43752 21 34 47.26 +02 38 14.3          20.6 GVEM026G96
    PK20K090  C2020 05 22.44269 21 34 47.45 +02 38 15.8          20.7 GVEM026G96
    PK20K090  C2020 05 22.44788 21 34 47.63 +02 38 17.0          20.7 GVEM026G96
    PK20K090  C2020 05 26.58036121 37 12.942+02 54 17.96         19.54wUEM026F51
    PK20K090  C2020 05 26.59479521 37 13.418+02 54 21.16         19.68wUEM026F51
    PK20K090  C2020 05 26.60203721 37 13.645+02 54 22.72         19.59wUEM026F51
    PK20K090  C2020 05 29.54392421 38 48.12 +03 04 53.7          19.30cVEM026T05
    PK20K090  C2020 05 29.54808221 38 48.32 +03 04 54.9          19.14cVEM026T05
    PK20K090  C2020 05 29.55540021 38 48.46 +03 04 56.2          19.40cVEM026T05
    PK20K090  C2020 05 29.56690521 38 48.77 +03 04 58.2          19.19cVEM026T05
    PK20K090  C2020 06 14.55674821 45 02.552+03 46 35.41         19.7 GVEM026F51
    PK20K090  C2020 06 14.55942921 45 02.596+03 46 35.47         19.2 GVEM026F51
    PK20K090 1C2020 06 16.73668 21 45 33.90 +03 49 54.0                VEM026Q62
    PK20K090 1C2020 06 16.73965 21 45 33.94 +03 49 54.1                VEM026Q62
    PK20K090 1C2020 06 16.74263 21 45 33.99 +03 49 54.2          19.4 GVEM026Q62
    PK20K090 ^C2020 06 17.54288221 45 44.364+03 50 53.09         19.40GVEM026568
    PK20K090 ^C2020 06 17.54405921 45 44.379+03 50 53.18         19.43GVEM026568
    PK20K090 ^C2020 06 17.54523721 45 44.393+03 50 53.28         19.45GVEM026568
    PK20K090 KC2020 06 18.35599421 45 54.18 +03 51 48.9          19.4 GVEM026858
    PK20K090 KC2020 06 18.38221521 45 54.44 +03 51 50.9          19.5 GVEM026858
    PK20K090 KC2020 06 18.40982121 45 54.73 +03 51 52.9          18.9 GVEM026858

Observer details:
568 Mauna Kea.  Observers R. Wainscoat, C. Wipper, T. Burdullis.  Measurers R.
    Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
858 Tebbutt Observatory, Edgewood.  Observer F. B. Zoltowski.  0.51-m Schmidt-
    Cassegrain + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, M.
    Willman, K. Chambers.  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 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.  1.5-m reflector + 10K CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, J. Tonry, A. Heinze, H.
    Weiland, H. Flewelling.  Measurers L. Denneau, J. Tonry, A. Heinze, H.
    Weiland, H. Flewelling, B. Stalder, A. Fitzsimmons, J. Robinson, N.
    Erasmus.  0.5-m reflector + CCD.

Orbital elements:
    P/2020 K9 (Lemmon-PANSTARRS)                                                
Epoch 2021 Jan. 26.0 TT = JDT 2459240.5                                         
T 2021 Feb. 13.60346 TT                                 Rudenko                 
q   2.8423749            (2000.0)            P               Q                  
n   0.11478347     Peri.  197.42919     +0.99220527     -0.08172817             
a   4.1932410      Node   166.19916     +0.08341941     +0.99641360             
e   0.3221532      Incl.   23.22517     -0.09257376     +0.02191894             
P   8.59                                                                        
>From 22 observations 2020 May 22-June 18, mean residual 0".3.                   
                                                                                
    P/2020 K9 (Lemmon-PANSTARRS)                                                
Epoch 2029 Sept. 21.0 TT = JDT 2462400.5                                        
T 2029 Sept. 22.67371 TT                                Rudenko                 
q   2.8594162            (2000.0)            P               Q                  
n   0.11415872     Peri.  197.46836     +0.99217090     -0.08221221             
a   4.2085257      Node   166.19013     +0.08395489     +0.99636071             
e   0.3205658      Incl.   23.19392     -0.09245797     +0.02250527             
P   8.63                                                                        
>From 22 observations 2020 May 22-June 18, mean residual 0".3.                   
                                                                                
    P/2020 K9 (Lemmon-PANSTARRS)                                                
Epoch 2020 May 31.0 TT = JDT 2459000.5                                          
T 2021 Feb. 13.26431 TT                                 Rudenko                 
q   2.8426330            (2000.0)            P               Q                  
n   0.11456202     Peri.  197.34758     +0.99231831     -0.08050144             
a   4.1986429      Node   166.21199     +0.08220297     +0.99651185             
e   0.3229639      Incl.   23.21236     -0.09245018     +0.02199226             
P   8.60                                                                        
>From 22 observations 2020 May 22-June 18, mean residual 0".3.                   
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2020 05 19    21 32 35.5 +02 23 59   3.0241  3.2193    91.8    18.3  20.0
...
2020 06 03    21 40 56.5 +03 19 19   2.7917  3.1832   103.4    18.1  19.8
...
2020 06 11    21 44 00.7 +03 39 55   2.6720  3.1644   109.9    17.6  19.6
...
2020 06 17    21 45 37.4 +03 50 13   2.5853  3.1505   114.9    17.0  19.5
2020 06 18    21 45 49.9 +03 51 27   2.5711  3.1483   115.7    16.9  19.5
2020 06 19    21 46 01.3 +03 52 32   2.5571  3.1460   116.6    16.8  19.5
...
2020 06 25    21 46 47.5 +03 55 48   2.4751  3.1324   121.8    16.0  19.4
...
2020 07 03    21 46 48.9 +03 50 44   2.3727  3.1146   129.0    14.7  19.3
...
2020 07 18    21 43 49.4 +03 08 14   2.2084  3.0824   143.1    11.4  19.1

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-M26




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