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  • MPEC 2019-B65 : COMET C/2019 B1 (Africano)

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    M.P.E.C. 2019-B65                                Issued 2019 Jan. 23, 18:38 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 B1 (Africano)
    
         B. Africano (703) reported that this object showed a diffuse ~10" coma
    with a compact bright core, but no obvious tail, in four coadded 30s images.
    D. C. Fuls (I52) described the object as having a very diffuse 10"-12" coma.
    P. Birtwhistle (J95) reported a 8" coma, extended to 9" to the west in a
    52.8-min integration.  S. Gadjos (118) stated that the object had an
    oval-shaped diffuse ~12" x 8" coma with a dense center, extended in P.A. ~300,
    on 18 stacked 40s CCD images.
    
    Observations:
        CK19B010* C2019 01 19.47745 13 41 40.77 +55 35 16.9          17.8 GVEB065703
        CK19B010  C2019 01 19.48255 13 41 39.52 +55 35 34.7          17.6 GVEB065703
        CK19B010  C2019 01 19.48764 13 41 37.94 +55 35 53.4          17.5 GVEB065703
        CK19B010  C2019 01 19.49273 13 41 36.83 +55 36 12.1          17.7 GVEB065703
        CK19B010  C2019 01 19.50653 13 41 33.89 +55 37 01.7          18.9 GVEB065I52
        CK19B010  C2019 01 19.50756 13 41 33.81 +55 37 06.0          18.7 GVEB065I52
        CK19B010  C2019 01 19.50858 13 41 33.66 +55 37 10.3          18.8 GVEB065I52
        CK19B010  C2019 01 19.52401 13 41 30.04 +55 38 04.4                VEB065I52
        CK19B010  C2019 01 19.52477 13 41 29.77 +55 38 07.1                VEB065I52
        CK19B010  C2019 01 19.52554 13 41 29.55 +55 38 10.5                VEB065I52
        CK19B010  C2019 01 19.52630 13 41 29.36 +55 38 11.8                VEB065I52
        CK19B010 KC2019 01 21.18573 13 34 32.85 +57 20 08.9                VEB065118
        CK19B010 KC2019 01 21.19251 13 34 30.90 +57 20 35.1                VEB065118
        CK19B010 KC2019 01 21.19832 13 34 29.31 +57 20 57.4                VEB065118
        CK19B010 KC2019 01 22.99832813 25 22.80 +59 16 20.3          18.8 GVEB065J95
        CK19B010 KC2019 01 23.00139513 25 21.79 +59 16 32.5          19.0 GVEB065J95
        CK19B010 KC2019 01 23.03037713 25 11.96 +59 18 27.3          19.0 GVEB065J95
        CK19B010 KC2019 01 23.04429713 25 07.31 +59 19 22.5          19.0 GVEB065J95
        CK19B010 KC2019 01 23.05559113 25 03.44 +59 20 06.9          18.9 GVEB065J95
    
    Observer details:
    118 Astronomical and Geophysical Observatory, Modra.  Observer S. Gajdos.
        0.6-m f/5.5 reflector + CCD.
    703 Catalina Sky 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, R. L. Seaman,
        F. C. Shelly.  0.68-m Schmidt + 10K CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observer D. C. Fuls.  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,
        R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
    J95 Great Shefford.  Observer P. Birtwhistle.  0.41-m f/6.3
        Schmidt-Cassegrain + CCD.
    
    Orbital elements:
        C/2019 B1 (Africano)
    T 2019 Mar. 19.23662 TT                                 MPCW
    q   1.6057674            (2000.0)            P               Q
                       Peri.  174.09325     -0.39659991     +0.48057156
                       Node   290.18416     +0.80444528     +0.59240092
    e   1.0            Incl.  123.55803     +0.44224010     -0.64661591
    From 17 observations 2019 Jan. 19-23.
    
    Ephemeris:
        C/2019 B1 (Africano)
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
    2018 12 24    14 15 38.7 +38 29 55   1.8378  1.9667    82.4    29.7  20.3
    ...
    2019 01 08    14 07 17.6 +46 03 07   1.4606  1.8611    97.3    31.6  19.5
    ...
    2019 01 16    13 52 45.2 +52 17 17   1.2731  1.8103   106.0    31.5  19.1
    ...
    2019 01 22    13 30 39.4 +58 11 44   1.1480  1.7752   112.5    30.8  18.8
    2019 01 23    13 25 21.9 +59 16 26   1.1290  1.7696   113.6    30.7  18.7
    2019 01 24    13 19 26.2 +60 22 24   1.1106  1.7640   114.6    30.5  18.7
    ...
    2019 01 30    12 24 18.7 +67 04 42   1.0156  1.7326   120.0    29.5  18.4
    ...
    2019 02 07    09 43 22.0 +72 17 08   0.9413  1.6953   123.2    29.1  18.2
    ...
    2019 02 22    05 49 26.4 +55 40 15   0.9996  1.6418   111.3    34.1  18.2
    
    Gareth V. Williams           (C) Copyright 2019 MPC           M.P.E.C. 2019-B65
    

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