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  • MPEC 2021-R167 : COMET C/2021 Q6 (PANSTARRS)

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    M.P.E.C. 2021-R167                            Issued 2021 September 9, 03:54 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
    
                           COMET C/2021 Q6 (PANSTARRS)                       
    
         Y. Ramanjooloo reports the discovery of a comet in four 120-second z-band
    survey images taken on Aug. 22 UT by Pan-STARRS 1 (F51), noting a condensed
    1".5 coma. R. Weryk reported a very condensed 0".8 coma and a straight 1" tail
    at position angle 200 degs. taken by CFHT (568) on Sep. 3 in three 90-second
    follow-up images. He also reported prediscovery positions going back to Jan.
    2021.
    
    Observations:
        CK21Q060 KC2021 01 02.29049202 12 14.021+33 32 26.08         22.12GVER167F51
        CK21Q060 KC2021 01 03.35078102 11 52.705+33 28 55.38         21.92GVER167F51
        CK21Q060  C2021 01 09.26746402 10 03.943+33 09 47.15         22.47GVER167F51
        CK21Q060  C2021 01 09.27969402 10 03.732+33 09 44.78         21.86GVER167F51
        CK21Q060  C2021 01 09.29186002 10 03.526+33 09 42.36         21.96GVER167F51
        CK21Q060  C2021 01 09.30404902 10 03.306+33 09 40.00         22.35GVER167F51
        CK21Q060 KC2021 01 30.24801302 05 55.372+32 10 22.52         21.89GVER167F51
        CK21Q060  C2021 01 31.30372702 05 48.289+32 07 47.90         22.13GVER167F51
        CK21Q060  C2021 01 31.31607602 05 48.248+32 07 46.59         21.98GVER167F51
        CK21Q060  C2021 07 28.60384802 25 08.319+33 19 41.99         20.87GVER167F51
        CK21Q060  C2021 07 28.61431902 25 08.232+33 19 42.82         21.33GVER167F51
        CK21Q060  C2021 08 19.46971202 20 04.755+33 38 19.84         20.84GVER167F51
        CK21Q060  C2021 08 19.48083902 20 04.530+33 38 20.38         21.79GVER167F51
        CK21Q060  C2021 08 19.49200002 20 04.312+33 38 20.76         21.51GVER167F51
        CK21Q060  C2021 08 19.50315502 20 04.099+33 38 20.74         21.31GVER167F51
        CK21Q060  C2021 08 20.51780402 19 44.226+33 38 48.62         21.11GVER167F51
        CK21Q060  C2021 08 20.53026402 19 43.960+33 38 48.63         21.61GVER167F51
        CK21Q060  C2021 08 20.54271502 19 43.713+33 38 48.89         21.30GVER167F51
        CK21Q060  C2021 08 20.55537802 19 43.458+33 38 49.41         21.54GVER167F51
        CK21Q060  C2021 08 20.63697002 19 41.825+33 38 51.28         20.46GVER167F51
        CK21Q060* C2021 08 22.51958702 19 03.479+33 39 34.77         22.25zUER167F51
        CK21Q060  C2021 08 22.52722502 19 03.306+33 39 34.60         22.19zUER167F51
        CK21Q060  C2021 08 22.53486002 19 03.164+33 39 34.87         21.97zUER167F51
        CK21Q060  C2021 08 22.54342102 19 02.982+33 39 35.00         22.16zUER167F51
        CK21Q060  C2021 08 23.58947002 18 40.875+33 39 55.00         21.18GVER167F51
        CK21Q060  C2021 08 23.59961602 18 40.650+33 39 55.23         20.86GVER167F51
        CK21Q060  C2021 08 23.61015702 18 40.424+33 39 55.29         20.68GVER167F51
        CK21Q060  C2021 08 23.61962302 18 40.238+33 39 55.55         20.81GVER167F51
        CK21Q060  C2021 08 23.63917002 18 39.832+33 39 56.09         22.45GVER167F51
        CK21Q060  C2021 08 24.61331602 18 18.703+33 40 11.87         20.78GVER167F51
        CK21Q060  C2021 08 24.61448402 18 18.695+33 40 11.97         20.96GVER167F51
        CK21Q060  C2021 08 24.63640202 18 18.198+33 40 12.13         22.03GVER167F51
        CK21Q060  C2021 08 25.60397502 17 56.776+33 40 25.18         20.90GVER167F51
        CK21Q060  C2021 08 25.60513802 17 56.755+33 40 25.22         20.80GVER167F51
        CK21Q060  C2021 09 03.41159602 14 20.54 +33 40 20.7          20.50GVER167G96
        CK21Q060  C2021 09 03.41678002 14 20.40 +33 40 20.7          20.67GVER167G96
        CK21Q060  C2021 09 03.42195902 14 20.25 +33 40 20.8          21.08GVER167G96
        CK21Q060  C2021 09 03.42714202 14 20.10 +33 40 20.1          20.75GVER167G96
        CK21Q060 ^C2021 09 03.45752902 14 19.318+33 40 20.11         20.64GVER167568
        CK21Q060 ^C2021 09 03.45908702 14 19.276+33 40 20.08         20.59GVER167568
        CK21Q060 ^C2021 09 03.46064202 14 19.236+33 40 20.09         20.62GVER167568
        CK21Q060  C2021 09 05.55299102 13 22.261+33 39 43.60         21.57wUER167F51
        CK21Q060  C2021 09 05.55999302 13 22.033+33 39 43.38         21.50wUER167F51
        CK21Q060  C2021 09 05.56730802 13 21.858+33 39 42.95         21.44wUER167F51
        CK21Q060  C2021 09 05.57454702 13 21.636+33 39 43.01         21.44wUER167F51
        CK21Q060 KC2021 09 07.04749302 12 40.36 +33 39 08.5          20.9 GVER167L01
        CK21Q060 KC2021 09 07.04972302 12 40.26 +33 39 07.5          20.9 GVER167L01
        CK21Q060 KC2021 09 07.05220002 12 40.19 +33 39 07.8          20.9 GVER167L01
    
    Observer details:
    568 Mauna Kea.  Observers R. Wainscoat, C. Cunningham, T. Burdullis.
        Measurers R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope +
        CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, A.
        Schultz, I. Smith.  Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
        Wainscoat, R. Weryk, K. Chambers, T. de Boer, J. Fairlamb, H. Gao, C.-C.
        Lin, E. Magnier.  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.
    L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
        + CCD.
    
    Orbital elements:
        C/2021 Q6 (PANSTARRS)                                                       
    Epoch 2024 Mar. 31.0 TT = JDT 2460400.5                                         
    T 2024 Mar. 24.80955 TT                                 Rudenko                 
    q   8.7102545            (2000.0)            P               Q                  
    z  -0.0000528      Peri.  140.99295     +0.96883252     -0.10173225             
     +/-0.0000132      Node   133.53657     -0.21686736     -0.78897580             
    e   1.0004601      Incl.  161.84654     +0.11971670     -0.60594368             
    From 48 observations 2021 Jan. 2-Sept. 7, mean residual 0".2.                   
                                                                                    
        C/2021 Q6 (PANSTARRS)                                                       
    Epoch 2021 July 5.0 TT = JDT 2459400.5                                          
    T 2024 Mar. 20.71958 TT                                 Rudenko                 
    q   8.7183202            (2000.0)            P               Q                  
    z  +0.0001132      Peri.  140.76396     +0.96925065     -0.09773759             
     +/-0.0000132      Node   133.54383     -0.21359812     -0.78984942             
    e   0.9990133      Incl.  161.84677     +0.12218441     -0.60546284             
    From 48 observations 2021 Jan. 2-Sept. 7, mean residual 0".2.                   
                                                                                    
    Ephemeris:
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
    2021 08 10    02 22 45.2 +33 32 10  10.1955 10.2922    92.6     5.6  21.2
    ...
    2021 08 25    02 18 10.2 +33 40 17   9.9048 10.2479   107.1     5.4  21.1
    ...
    2021 09 02    02 14 57.7 +33 40 37   9.7579 10.2245   114.9     5.1  21.0
    ...
    2021 09 08    02 12 13.1 +33 38 42   9.6535 10.2070   120.9     4.9  21.0
    2021 09 09    02 11 44.0 +33 38 11   9.6367 10.2041   121.8     4.8  21.0
    2021 09 10    02 11 14.4 +33 37 37   9.6200 10.2012   122.8     4.8  21.0
    ...
    2021 09 16    02 08 08.2 +33 32 56   9.5244 10.1838   128.7     4.4  21.0
    ...
    2021 09 24    02 03 37.5 +33 23 14   9.4093 10.1608   136.5     3.9  20.9
    ...
    2021 10 09    01 54 15.9 +32 53 47   9.2390 10.1179   150.2     2.8  20.9
    
    M. P. C. Staff               (C) Copyright 2021 MPC           M.P.E.C. 2021-R167
    


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