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  • MPEC 2019-M77 : C/2019 L1

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    M.P.E.C. 2019-M77                                Issued 2019 June 26, 19:23 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/2019 L1 (PANSTARRS)                       
    
         This object was reported as a possible comet by R. Weryk and R. Wainscoat
    (F51, June 12), who noted that the object had a FWHM of ~1".9 (compared to
    1".79 +/- 0".04 for nearby stars) and a broad low-surface-brightness tail
    extending 10" towards P.A. ~255.  A. F. Tubbiolo (695, June 23) reported a
    tail in P.A. ~260 extending for more than 20".  K. Sarneczky (K88, June 24,
    stacked 4 x 120s) described a compact 5" coma and a 20" tail in P.A. 240.
    
    Observations:
        CK19L010  C2019 05 30.55067 20 06 46.373-13 15 45.97         20.7 wUEM077F51
        CK19L010  C2019 05 30.56371 20 06 46.512-13 15 41.43         20.5 wUEM077F51
        CK19L010  C2019 06 03.34255 20 07 22.80 -12 54 47.7          20.0 GVEM077G96
        CK19L010  C2019 06 03.34347 20 07 22.78 -12 54 46.8          20.4 GVEM077G96
        CK19L010  C2019 06 03.34907 20 07 22.83 -12 54 45.5          19.9 GVEM077G96
        CK19L010  C2019 06 03.34999 20 07 22.81 -12 54 44.7          20.1 GVEM077G96
        CK19L010  C2019 06 03.35556 20 07 22.80 -12 54 43.4          20.2 GVEM077G96
        CK19L010  C2019 06 03.35648 20 07 22.86 -12 54 42.2          20.0 GVEM077G96
        CK19L010  C2019 06 03.36208 20 07 22.88 -12 54 40.8          20.0 GVEM077G96
        CK19L010  C2019 06 03.36300 20 07 22.89 -12 54 40.6          20.0 GVEM077G96
        CK19L010  C2019 06 08.57618 20 07 43.973-12 26 59.31         20.0 wUEM077F52
        CK19L010  C2019 06 08.58785 20 07 43.976-12 26 55.64         20.1 wUEM077F52
        CK19L010  C2019 06 08.59949 20 07 43.967-12 26 51.85         20.2 wUEM077F52
        CK19L010* C2019 06 12.52773 20 07 38.538-12 07 02.73         20.1 w EM077F52
        CK19L010  C2019 06 12.54015 20 07 38.472-12 06 58.94         20.2 w EM077F52
        CK19L010  C2019 06 12.55257 20 07 38.403-12 06 55.17         20.2 w EM077F52
        CK19L010  C2019 06 12.56501 20 07 38.317-12 06 51.43         20.2 w EM077F52
        CK19L010 9C2019 06 14.19404 20 07 30.66 -11 58 56.2          19.3 GVEM077G40
        CK19L010 9C2019 06 14.20052 20 07 30.63 -11 58 54.0          19.5 GVEM077G40
        CK19L010 HC2019 06 14.29437 20 07 30.33 -11 58 27.0          20.4 RoEM077691
        CK19L010 HC2019 06 14.30854 20 07 30.25 -11 58 23.0          20.2 RoEM077691
        CK19L010 HC2019 06 14.32272 20 07 30.18 -11 58 18.9          20.2 RoEM077691
        CK19L010  C2019 06 15.34234 20 07 23.64 -11 53 27.3          19.9 GVEM077I52
        CK19L010  C2019 06 15.35203 20 07 23.54 -11 53 25.5          21.1 GVEM077I52
        CK19L010  C2019 06 15.36317 20 07 23.51 -11 53 21.6                VEM077I52
        CK19L010  C2019 06 15.37260 20 07 23.44 -11 53 18.7                VEM077I52
        CK19L010 ^C2019 06 23.45821 20 05 51.93 -11 17 20.7          19.6 RoEM077695
        CK19L010 ^C2019 06 23.46591 20 05 51.80 -11 17 18.8          19.7 RoEM077695
        CK19L010 KC2019 06 24.93979920 05 28.05 -11 11 18.9          19.6 GVEM077L01
        CK19L010 KC2019 06 24.94374220 05 27.99 -11 11 18.0          19.7 GVEM077L01
        CK19L010 KC2019 06 24.94690220 05 27.91 -11 11 17.1          19.8 GVEM077L01
        CK19L010 KC2019 06 24.95087820 05 27.87 -11 11 16.5          19.7 GVEM077L01
        CK19L010 KC2019 06 24.98818 20 05 27.20 -11 11 07.0          19.2 RoEM077K88
        CK19L010 KC2019 06 24.99464 20 05 27.06 -11 11 05.5          19.2 RoEM077K88
        CK19L010 KC2019 06 25.00110 20 05 26.94 -11 11 04.4          19.1 RoEM077K88
        CK19L010  C2019 06 25.28674 20 05 22.12 -11 09 54.8          19.6 GVEM077I52
        CK19L010  C2019 06 25.29892 20 05 21.95 -11 09 52.1          20.1 GVEM077I52
        CK19L010 KC2019 06 26.02942 20 05 08.91 -11 06 59.6                qEM077I93
        CK19L010 KC2019 06 26.03926 20 05 08.83 -11 06 56.5          19.6 VqEM077I93
        CK19L010 KC2019 06 26.04994 20 05 08.63 -11 06 53.5          19.8 VqEM077I93
        CK19L010 KC2019 06 26.37011 20 05 02.77 -11 05 38.2          19.3 RoEM077691
        CK19L010 KC2019 06 26.37373 20 05 02.65 -11 05 37.6          19.3 RoEM077691
        CK19L010 KC2019 06 26.37735 20 05 02.64 -11 05 36.4          19.4 RoEM077691
    
    Observer details:
    691 Steward Observatory, Kitt Peak-Spacewatch.  Observer R. S. McMillan.  
        0.9-m f/3 reflector + CCD.
    695 Kitt Peak.  Observer A. F. Tubbiolo.  2.3-m f/9 reflector + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, 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.
    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.
    G40 Slooh.com Canary Islands Observatory.  Observer B. Lutkenhoner.  
        0.5-m f/6.8 Corrected Dall-Kirkham + CCD.
    G96 Mt. Lemmon Survey.  Observer B. M. Africano.  Measurers B. M. Africano,
        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.  1.5-m reflector + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observers T. A. Pruyne,
        R. A. Kowalski.  Measurers B. M. Africano, 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.  1.0-m reflector + CCD.
    I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
    K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
    L01 Visnjan Observatory, Tican.  Observers K. Korlevic, P. Gural, D. Vida.  
        Measurers K. Korlevic, D. Vida.  1.0-m f/2.9 reflector + CCD.
    
    Orbital elements:
        C/2019 L1 (PANSTARRS)                                                       
    Epoch 2019 Aug. 25.0 TT = JDT 2458720.5                                         
    T 2019 Aug. 11.42506 TT                                 MPCLINUX                
    q   2.8899466            (2000.0)            P               Q                  
    n   0.03193209     Peri.   49.95813     +0.55328887     +0.81604829             
    a   9.8397604      Node   254.40779     -0.80731506     +0.47589619             
    e   0.7062991      Incl.    9.99304     -0.20521652     +0.32800611             
    P  30.9                                                                         
    From 43 observations 2019 May 30-June 26, mean residual 0".4.                   
                                                                                    
        C/2019 L1 (PANSTARRS)                                                       
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5                                         
    T 2019 Aug. 11.40932 TT                                 MPCLINUX                
    q   2.8899329            (2000.0)            P               Q                  
    n   0.03183299     Peri.   49.95589     +0.55326693     +0.81606267             
    a   9.8601706      Node   254.40850     -0.80732787     +0.47587349             
    e   0.7069084      Incl.    9.99315     -0.20522527     +0.32800326             
    P  31.0                                                                         
    From 43 observations 2019 May 30-June 26, mean residual 0".4.                   
                                                                                    
    Ephemeris:
    Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1
    2019 05 27    20 05 56.3 -13 35 57   2.2713  2.9618   124.2    16.4  20.0
    ...
    2019 06 11    20 07 42.8 -12 14 37   2.1066  2.9366   137.5    13.5  19.8
    ...
    2019 06 19    20 06 51.0 -11 36 32   2.0350  2.9254   144.9    11.5  19.7
    ...
    2019 06 25    20 05 26.9 -11 11 01   1.9898  2.9179   150.5     9.9  19.6
    2019 06 26    20 05 09.5 -11 07 03   1.9830  2.9168   151.5     9.6  19.6
    2019 06 27    20 04 51.1 -11 03 09   1.9765  2.9156   152.4     9.3  19.6
    ...
    2019 07 03    20 02 42.6 -10 41 36   1.9419  2.9093   157.9     7.5  19.6
    ...
    2019 07 11    19 59 12.8 -10 17 52   1.9094  2.9023   164.7     5.3  19.5
    ...
    2019 07 26    19 51 47.7 -09 49 03   1.8915  2.8933   168.2     4.1  19.5
    
    A. U. Tomatic                (C) Copyright 2019 MPC           M.P.E.C. 2019-M77
    


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