• MPC Preparation (Info)

  • MPEC 2019-C21 : COMET P/2019 B2 (Groeller)

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    M.P.E.C. 2019-C21                                Issued 2019 Feb. 4, 04:02 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 P/2019 B2 (Groeller)
    
         In the initial report of this object, H. Groeller described a ~10" tail
    in P.A. 290-320, in four co-added 30s exposures.  R. Weryk (F51, Jan. 25)
    reported a 6" tail in P.A. 320, with a ~2" FWHM (much larger than the 1".0 +/-
    0".1 FWHM of nearby stars).  Other reports of cometary activity have been
    received as follows:
    
    OC  Date     Reporter              Coma    Tail/P.A.       Exposures
    I47 20190127 M. Masek               22"                    20 x 120s
    G40 20190127 B. Lutkenhoner         15"
    H06 20190127 H. Sato                20"    25" in 270-330  16 x 60s
    Q11 20190129 H. Sato                11"    20" in 301      12 x 60s
    L01 20190129 K. Korlevic                   45" in 315
    J95 20190202 P. Birtwhistle         14"    Coma extended to 12" in P.A. 290
    
    Observations:
        PK19B020  C2019 01 04.57882509 32 24.424-03 42 01.89         18.1 GVEC021F51
        PK19B020  C2019 01 04.59069809 32 24.308-03 42 01.96         18.1 GVEC021F51
        PK19B020  C2019 01 04.60257409 32 24.185-03 42 02.04         18.0 GVEC021F51
        PK19B020  C2019 01 04.61447709 32 24.067-03 42 02.06         18.0 GVEC021F51
        PK19B020  C2019 01 13.49202009 30 20.459-03 33 19.97         18.8 GVEC021F51
        PK19B020  C2019 01 13.50405609 30 20.197-03 33 18.58         18.8 GVEC021F51
        PK19B020  C2019 01 13.51609309 30 19.937-03 33 17.07         18.6 GVEC021F51
        PK19B020  C2019 01 13.52815809 30 19.678-03 33 15.71         18.7 GVEC021F51
        PK19B020  C2019 01 25.52826909 25 06.913-02 48 49.73         19.6 GVEC021F51
        PK19B020  C2019 01 25.53999709 25 06.555-02 48 46.68         19.9 GVEC021F51
        PK19B020  C2019 01 25.55175209 25 06.156-02 48 42.57         19.8 GVEC021F51
        PK19B020  C2019 01 25.56350709 25 05.739-02 48 39.72         19.4 GVEC021F51
        PK19B020* C2019 01 26.31403 09 24 41.56 -02 44 31.9          18.0 GVEC021703
        PK19B020  C2019 01 26.31945 09 24 41.46 -02 44 28.5          17.7 GVEC021703
        PK19B020  C2019 01 26.32487 09 24 41.12 -02 44 26.8          17.3 GVEC021703
        PK19B020  C2019 01 26.33029 09 24 40.90 -02 44 25.3          17.8 GVEC021703
        PK19B020  C2019 01 26.40570 09 24 38.67 -02 44 05.5          20.3 GVEC021I52
        PK19B020  C2019 01 26.41005 09 24 38.52 -02 44 03.0          18.7 GVEC021I52
        PK19B020  C2019 01 26.41432 09 24 38.29 -02 44 01.5          19.0 GVEC021I52
        PK19B020  C2019 01 26.42284 09 24 38.08 -02 43 58.5          18.6 GVEC021I52
        PK19B020 KC2019 01 26.82962 09 24 25.12 -02 41 39.4          20.1 GVEC021L29
        PK19B020 KC2019 01 26.84006 09 24 24.77 -02 41 33.1          19.6 GVEC021L29
        PK19B020 KC2019 01 26.90975 09 24 22.49 -02 41 10.3          19.5 GVEC021L29
        PK19B020 KC2019 01 26.91730 09 24 22.19 -02 41 08.7          19.8 GVEC021L29
        PK19B020 9C2019 01 27.06152 09 24 17.37 -02 40 22.8          19.2 VUEC021G40
        PK19B020 "C2019 01 27.11831 09 24 15.35 -02 40 03.9          19.3 VqEC021G40
        PK19B020 "C2019 01 27.13211 09 24 14.88 -02 39 59.5          19.5 VqEC021G40
        PK19B020 KC2019 01 27.13736 09 24 14.96 -02 39 50.1          18.7 VqEC021I47
        PK19B020 KC2019 01 27.14434 09 24 14.71 -02 39 48.9          18.7 VqEC021I47
        PK19B020 "C2019 01 27.14599 09 24 14.42 -02 39 54.6          19.5 VqEC021G40
        PK19B020 KC2019 01 27.15133 09 24 14.48 -02 39 46.8          18.7 VqEC021I47
        PK19B020 9C2019 01 27.17779 09 24 13.31 -02 39 42.9          19.2 VUEC021G40
        PK19B020  C2019 01 27.21969 09 24 12.29 -02 39 30.2          20.4 GVEC021I52
        PK19B020  C2019 01 27.22549 09 24 12.13 -02 39 28.9          19.5 GVEC021I52
        PK19B020  C2019 01 27.23291 09 24 11.88 -02 39 26.6          19.9 GVEC021I52
        PK19B020 |C2019 01 27.36966 09 24 07.06 -02 38 38.7                VEC021H06
        PK19B020 |C2019 01 27.37362 09 24 06.93 -02 38 37.0                VEC021H06
        PK19B020 |C2019 01 27.37757 09 24 06.78 -02 38 35.6          18.4 GVEC021H06
        PK19B020 KC2019 01 27.56247 09 24 00.65 -02 37 23.9          19.2 RqEC021E94
        PK19B020 KC2019 01 27.57860 09 24 00.10 -02 37 17.8          19.2 RqEC021E94
        PK19B020 KC2019 01 27.59476 09 23 59.20 -02 37 09.8          19.2 RqEC021E94
        PK19B020 KC2019 01 27.62701 09 23 58.27 -02 37 03.7          19.2 RqEC021E94
        PK19B020  C2019 01 28.42805 09 23 31.40 -02 32 20.3          18.9 GVEC021I52
        PK19B020  C2019 01 28.43303 09 23 31.19 -02 32 18.5          19.2 GVEC021I52
        PK19B020  C2019 01 28.43800 09 23 30.96 -02 32 16.8                VEC021I52
        PK19B020 pC2019 01 28.89493709 23 15.97 -02 29 31.6          21.1 GVEC021K41
        PK19B020 pC2019 01 28.91086409 23 15.18 -02 29 27.5          21.0 GVEC021K41
        PK19B020 KC2019 01 28.95816 09 23 13.44 -02 29 05.4          19.9 GVEC021587
        PK19B020 KC2019 01 28.95957 09 23 13.40 -02 29 05.2                VEC021587
        PK19B020 KC2019 01 28.96098 09 23 13.37 -02 29 04.6                VEC021587
        PK19B020 KC2019 01 28.96538 09 23 13.30 -02 29 03.9          19.0 GVEC021L06
        PK19B020 KC2019 01 28.97476 09 23 12.97 -02 29 00.5          18.9 GVEC021L06
        PK19B020 KC2019 01 28.98391 09 23 12.59 -02 28 57.3          19.0 RqEC021L27
        PK19B020 KC2019 01 28.98547 09 23 12.58 -02 28 56.8          18.7 GVEC021L06
        PK19B020 KC2019 01 28.98784 09 23 12.46 -02 28 55.3          19.0 RqEC021L27
        PK19B020 KC2019 01 28.99176 09 23 12.23 -02 28 54.7          19.3 RqEC021L27
        PK19B020  C2019 01 29.44564 09 22 56.50 -02 26 02.5          19.3 GVEC021I52
        PK19B020  C2019 01 29.44914 09 22 56.30 -02 25 58.9          18.5 GVEC021I52
        PK19B020  C2019 01 29.45365 09 22 56.20 -02 25 58.2          18.7 GVEC021I52
        PK19B020  C2019 01 29.45697 09 22 55.96 -02 25 57.2          19.5 GVEC021I52
        PK19B020 KC2019 01 29.69484 09 22 47.94 -02 24 27.3                qEC021Q11
        PK19B020 KC2019 01 29.70058 09 22 47.74 -02 24 25.6                qEC021Q11
        PK19B020 KC2019 01 29.70665 09 22 47.50 -02 24 23.0          18.8 RqEC021Q11
        PK19B020 KC2019 01 29.91093 09 22 40.63 -02 23 04.8          19.2 RqEC021K61
        PK19B020 KC2019 01 29.91327 09 22 40.58 -02 23 05.1          19.5 RqEC021K61
        PK19B020 KC2019 01 29.94520409 22 39.39 -02 22 51.1          20.0 GVEC021L01
        PK19B020 KC2019 01 29.94792909 22 39.30 -02 22 51.2          20.0 GVEC021L01
        PK19B020 KC2019 01 29.98130509 22 38.06 -02 22 37.4          19.9 GVEC021L01
        PK19B020 KC2019 01 30.00077509 22 37.40 -02 22 29.9          19.9 GVEC021L01
        PK19B020 KC2019 01 30.57595 09 22 17.06 -02 18 36.3          19.3 RqEC021E94
        PK19B020 KC2019 01 30.58368 09 22 16.79 -02 18 33.3          19.2 RqEC021E94
        PK19B020 KC2019 01 30.59140 09 22 16.52 -02 18 30.7          19.2 RqEC021E94
        PK19B020 KC2019 01 30.59912 09 22 16.20 -02 18 27.3          19.3 RqEC021E94
        PK19B020 KC2019 01 30.60683 09 22 15.92 -02 18 23.4          19.2 RqEC021E94
        PK19B020 KC2019 01 30.96697 09 22 03.28 -02 16 07.1          19.7 GVEC021Z99
        PK19B020 KC2019 01 30.97316 09 22 03.10 -02 16 05.1          19.5 GVEC021Z99
        PK19B020 KC2019 01 30.97930 09 22 02.68 -02 16 02.3          18.6 GVEC021Z99
        PK19B020 KC2019 01 31.65519 09 21 38.76 -02 11 24.5                qEC021Q11
        PK19B020 KC2019 01 31.66413 09 21 38.41 -02 11 21.0          18.5 RqEC021Q11
        PK19B020  C2019 01 31.92178 09 21 29.23 -02 09 35.6          20.4 VVEC021033
        PK19B020  C2019 01 31.92247 09 21 29.23 -02 09 35.1          20.4 VVEC021033
        PK19B020  C2019 01 31.92314 09 21 29.23 -02 09 34.5          20.4 VVEC021033
        PK19B020  C2019 01 31.92382 09 21 29.19 -02 09 34.3          20.4 VVEC021033
        PK19B020  C2019 01 31.99097 09 21 26.67 -02 09 07.0          20.7 VVEC021033
        PK19B020  C2019 01 31.99164 09 21 26.60 -02 09 06.2          20.5 VVEC021033
        PK19B020  C2019 01 31.99231 09 21 26.56 -02 09 05.6          20.3 VVEC021033
        PK19B020 KC2019 02 01.09862 09 21 22.97 -02 08 12.9          19.9 VqEC021I47
        PK19B020 KC2019 02 01.10801 09 21 22.69 -02 08 08.6          20.0 VqEC021I47
        PK19B020 KC2019 02 01.36023 09 21 13.24 -02 06 30.6                oEC021711
        PK19B020 IC2019 02 01.36287 09 21 13.05 -02 06 28.4                oEC021711
        PK19B020 IC2019 02 01.36811 09 21 12.72 -02 06 27.4                oEC021711
        PK19B020 KC2019 02 02.44161 09 20 33.75 -01 58 45.9                oEC021711
        PK19B020 KC2019 02 02.44454 09 20 33.53 -01 58 41.8                oEC021711
        PK19B020 KC2019 02 02.44709 09 20 33.39 -01 58 40.1                oEC021711
        PK19B020 KC2019 02 02.69000 09 20 24.63 -01 56 51.4                qEC021Q11
        PK19B020 KC2019 02 02.69570 09 20 24.39 -01 56 48.8          18.7 RqEC021Q11
        PK19B020 KC2019 02 02.95527909 20 15.00 -01 54 54.8          20.5 GVEC021J95
        PK19B020 KC2019 02 02.96802409 20 14.55 -01 54 50.3          20.6 GVEC021J95
        PK19B020 KC2019 02 02.98081909 20 13.98 -01 54 43.1          20.3 GVEC021J95
        PK19B020 KC2019 02 02.99821409 20 13.40 -01 54 37.1                VEC021J95
        PK19B020 KC2019 02 03.04829 09 20 11.63 -01 54 13.1          19.8 GVEC021Z99
        PK19B020 KC2019 02 03.05350 09 20 11.39 -01 54 11.5          19.5 GVEC021Z99
        PK19B020 KC2019 02 03.05871 09 20 11.06 -01 54 09.0          19.8 GVEC021Z99
        PK19B020 KC2019 02 03.23407 09 20 04.75 -01 52 48.6                oEC021711
        PK19B020 KC2019 02 03.23731 09 20 04.73 -01 52 47.0                oEC021711
        PK19B020 IC2019 02 03.24256 09 20 04.51 -01 52 44.6                oEC021711
        PK19B020 IC2019 02 03.24532 09 20 04.09 -01 52 41.5                oEC021711
        PK19B020  C2019 02 04.02435 09 19 35.25 -01 46 47.8          20.4 VVEC021033
        PK19B020  C2019 02 04.02583 09 19 35.19 -01 46 47.2          20.2 VVEC021033
        PK19B020  C2019 02 04.02733 09 19 35.11 -01 46 46.3          20.1 VVEC021033
    
    Observer details:
    033 Karl Schwarzschild Observatory, Tautenburg.  Observers F. Ludwig,
        B. Stecklum.  Measurer B. Stecklum.  1.34-m f/3 Schmidt + CCD.
    587 Sormano.  Observers F. Manca, P. Sicoli, A. Testa.  Measurer P. Sicoli.
        0.5-m f/6.8 reflector + CCD.
    703 Catalina Sky Survey.  Observer H. Groeller.  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,
        R. L. Seaman, F. C. Shelly.  0.68-m Schmidt + 10K CCD.
    711 McDonald Observatory, Fort Davis.  Observer J. G. Ries.  2.1-m reflector
        + CCD + focal reducer.
    E94 Possum Observatory, Gisborne.  Observer J. Drummond.  0.41-m f/4.5
        Newtonian reflector + CCD.
    F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe,
        E. Magnier, A. Schultz, M. Willman.  Measurers S. Chastel, M. Huber,
        Y. Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
    G40 Slooh.com Canary Islands Observatory.  Observers B. Lutkenhoner,
        G. Gasparovic, Y. Chen.  Measurers B. Lutkenhoner, G. Gasparovic, Y. Chen,
        G. Y. Gasparovic.  0.43-m f/6.8 Corrected Dall-Kirkham + CCD.
    H06 iTelescope Observatory, Mayhill.  Observer H. Sato.  0.43-m f/6.8
        astrograph + CCD + f/4.5 focal reducer.
    I47 Pierre Auger Observatory, Malargue.  Observer M. Masek.  0.3-m f/6.8
        reflector + CCD.
    I52 Steward Observatory, Mt. Lemmon Station.  Observers B. M. Africano,
        H. Groeller.  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, 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.
    K41 Vegaquattro Astronomical Observatory, Novi Ligure.  Observer V. Luna.
        0.3-m Schmidt-Cassegrain + CCD.
    K61 Rokycany Observatory.  Observer M. Adamovsky.  0.51-m f/6.8 reflector +
        CCD.
    L01 Visnjan Observatory, Tican.  Observers K. Korlevic, F. Valentine.
        Measurer K. Korlevic.  1.0-m f/2.9 reflector + CCD.
    L06 Sormano 2 Observatory, Bellagio Via Lattea.  Observer G. Ventre.
        Measurers G. Ventre, P. Sicoli.  0.28-m Schmidt-Cassegrain + CCD.
    L27 29PREMOTE Observatory, Dauban.  Observer J.-F. Soulier.  0.20-m f/4
        Newtonian reflector + CCD.
    L29 Drebach-South Observatory, Windhoek.  Observers G. Lehmann, K. Lehmann.
        0.4-m f/3.6 reflector + CCD.
    Q11 Shinshiro.  Observer T. Ikemura.  Measurer H. Sato.  0.35-m f/5 reflector
        + CCD.
    Z99 Clixby Observatory, Cleethorpes.  Observer A. Mickleburgh.  0.36-m f/8
        Schmidt-Cassegrain + CCD.
    
    Orbital elements:
        P/2019 B2 (Groeller)
    Epoch 2019 June 6.0 TT = JDT 2458640.5
    T 2019 June 8.61593 TT                                  MPCW
    q   2.4150292            (2000.0)            P               Q
    n   0.13028507     Peri.  358.92793     -0.99678160     -0.07811970
    a   3.8536560      Node   176.43854     +0.07553751     -0.99043295
    e   0.3733148      Incl.   16.83733     +0.02684260     -0.11375360
    P   7.57
    From 84 observations 2019 Jan. 4-Feb. 4, mean residual 0".6.
    
        P/2019 B2 (Groeller)
    Epoch 2027 Mar. 16.0 TT = JDT 2461480.5
    T 2027 Feb. 25.80636 TT                                 MPCW
    q   2.5279195            (2000.0)            P               Q
    n   0.12626658     Peri.    0.61862     -0.99765022     -0.06454244
    a   3.9349913      Node   175.48387     +0.06153931     -0.99163513
    e   0.3575794      Incl.   16.97256     +0.03011576     -0.11177678
    P   7.81
    From 84 observations 2019 Jan. 4-Feb. 4, mean residual 0".6.
    
        P/2019 B2 (Groeller)
    Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
    T 2019 June 8.60851 TT                                  MPCW
    q   2.4150320            (2000.0)            P               Q
    n   0.13027843     Peri.  358.92561     -0.99677857     -0.07815851
    a   3.8537870      Node   176.43863     +0.07557607     -0.99042970
    e   0.3733354      Incl.   16.83717     +0.02684664     -0.11375525
    P   7.57
    From 84 observations 2019 Jan. 4-Feb. 4, mean residual 0".6.
    
    Ephemeris:
        P/2019 B2 (Groeller)
    Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
    2019 01 05    09 32 21.0 -03 42 02   1.8377  2.6236   134.6    15.5  20.0
    ...
    2019 01 20    09 27 49.3 -03 14 02   1.6935  2.5875   149.1    11.3  19.8
    ...
    2019 01 28    09 23 46.1 -02 34 53   1.6367  2.5694   156.4     8.8  19.7
    ...
    2019 02 03    09 20 13.3 -01 54 31   1.6045  2.5564   160.9     7.2  19.6
    2019 02 04    09 19 36.2 -01 46 55   1.6001  2.5543   161.6     7.0  19.6
    2019 02 05    09 18 58.8 -01 39 05   1.5959  2.5522   162.1     6.8  19.6
    ...
    2019 02 11    09 15 11.1 -00 47 27   1.5764  2.5398   164.1     6.1  19.5
    ...
    2019 02 19    09 10 16.4 +00 31 43   1.5654  2.5241   162.0     6.9  19.5
    ...
    2019 03 06    09 03 05.6 +03 17 30   1.5900  2.4971   149.7    11.6  19.5
    
    Gareth V. Williams           (C) Copyright 2019 MPC           M.P.E.C. 2019-C21
    

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