[Iaude] MPEC Y71: COMET C/2018 W2 (Africano)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Tue Dec 25 21:35:16 EST 2018


M.P.E.C. 2018-Y71                                Issued 2018 Dec. 26, 02:29 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 C/2018 W2 (Africano)
 
Observations:
    CK18W020 KC2018 12 02.46229 13 05 15.51 +45 18 05.2          17.9 RuEY071850
    CK18W020 KC2018 12 02.47518 13 05 16.51 +45 18 15.2          18.1 RuEY071850
    CK18W020 KC2018 12 02.48794 13 05 17.28 +45 18 26.4          18.2 RuEY071850
    CK18W020  C2018 12 03.26972 13 06 10.16 +45 28 48.3          18.3 GVEY071J04
    CK18W020  C2018 12 03.27082 13 06 10.22 +45 28 49.2          18.4 GVEY071J04
    CK18W020  C2018 12 03.27192 13 06 10.32 +45 28 50.1          18.4 GVEY071J04
    CK18W020 KC2018 12 04.02703 13 07 01.45 +45 39 00.2          17.8 NqEY071970
    CK18W020 KC2018 12 04.03239 13 07 01.79 +45 39 04.6          18.3 NqEY071970
    CK18W020 KC2018 12 04.10581 13 07 06.73 +45 40 04.9          17.6 NqEY071I81
    CK18W020 KC2018 12 04.11163 13 07 07.13 +45 40 09.7          17.6 NqEY071I81
    CK18W020 KC2018 12 04.11671 13 07 07.48 +45 40 13.9          17.8 NqEY071I81
    CK18W020 KC2018 12 04.18479 13 07 12.16 +45 41 10.6          18.6 NvEY071L06
    CK18W020 KC2018 12 04.19664 13 07 12.92 +45 41 20.7          18.9 NvEY071L06
    CK18W020 KC2018 12 04.20848 13 07 13.71 +45 41 30.2          18.8 NvEY071L06
    CK18W020  C2018 12 04.48855 13 07 32.70 +45 45 20.8          18.1 GVEY071703
    CK18W020  C2018 12 04.49363 13 07 32.99 +45 45 25.1          18.0 GVEY071703
    CK18W020  C2018 12 04.49872 13 07 33.37 +45 45 29.5          18.0 GVEY071703
    CK18W020  C2018 12 04.50381 13 07 33.68 +45 45 33.4          18.1 GVEY071703
    CK18W020 KC2018 12 05.12448 13 08 15.95 +45 54 08.6          17.9 NqEY071I81
    CK18W020 KC2018 12 05.12811 13 08 16.19 +45 54 11.4          17.9 NqEY071I81
    CK18W020 KC2018 12 05.13173 13 08 16.46 +45 54 14.1          17.8 NqEY071I81
    CK18W020 KC2018 12 05.15102 13 08 17.79 +45 54 31.0          18.2 NvEY071L06
    CK18W020 KC2018 12 05.16435 13 08 18.72 +45 54 42.5          18.5 NvEY071L06
    CK18W020 KC2018 12 05.16823 13 08 18.93 +45 54 46.0          18.0 ToEY071461
    CK18W020 KC2018 12 05.17147 13 08 19.14 +45 54 48.7          18.1 ToEY071461
    CK18W020 KC2018 12 05.17472 13 08 19.41 +45 54 51.5          18.5 ToEY071461
    CK18W020 KC2018 12 05.17796 13 08 19.59 +45 54 54.2          17.9 ToEY071461
    CK18W020 KC2018 12 05.18121 13 08 19.82 +45 54 57.1          18.1 ToEY071461
    CK18W020 KC2018 12 05.18355 13 08 20.06 +45 54 58.5          18.5 NvEY071L06
    CK18W020 KC2018 12 05.18445 13 08 20.03 +45 54 59.7          18.1 ToEY071461
    CK18W020 KC2018 12 09.12623 13 12 49.74 +46 52 29.7          18.4 NqEY071157
    CK18W020 KC2018 12 09.13096 13 12 50.03 +46 52 34.2          17.8 NqEY071157
    CK18W020 KC2018 12 09.13516 13 12 50.34 +46 52 37.4          17.8 NqEY071157
    CK18W020 KC2018 12 09.13936 13 12 50.63 +46 52 42.0          18.0 NqEY071157
    CK18W020 KC2018 12 09.14356 13 12 50.94 +46 52 45.8          18.1 NqEY071157
    CK18W020 _C2018 12 09.52987 13 13 17.53 +46 58 40.4          18.6 RqEY071U69
    CK18W020 _C2018 12 09.53242 13 13 17.69 +46 58 42.4          18.5 RqEY071U69
    CK18W020 _C2018 12 09.53932 13 13 18.11 +46 58 48.5          18.7 RqEY071U69
    CK18W020 5C2018 12 09.54446 13 13 18.53 +46 58 53.0                VEY071U69
    CK18W020 5C2018 12 09.54721 13 13 18.68 +46 58 55.9                VEY071U69
    CK18W020 5C2018 12 09.54994 13 13 18.88 +46 58 58.6          18.3 GVEY071U69
    CK18W020  C2018 12 10.80510 13 14 45.38 +47 18 30.1          17.4 TqEY071Q11
    CK18W020  C2018 12 10.81368 13 14 45.97 +47 18 38.2                qEY071Q11
    CK18W020  C2018 12 10.81795 13 14 46.25 +47 18 42.3                qEY071Q11
    CK18W020 KC2018 12 11.13641 13 15 08.30 +47 23 43.3          18.4 ToEY071461
    CK18W020 KC2018 12 11.14126 13 15 08.58 +47 23 48.2          18.1 ToEY071461
    CK18W020 KC2018 12 11.14612 13 15 08.90 +47 23 52.8          18.2 ToEY071461
    CK18W020 KC2018 12 11.15098 13 15 09.24 +47 23 57.5          18.0 ToEY071461
    CK18W020 KC2018 12 15.15866 13 19 47.89 +48 30 12.2          18.0 RQEY071213
    CK18W020 KC2018 12 15.17446 13 19 48.95 +48 30 28.7          17.9 RQEY071213
    CK18W020 KC2018 12 15.19176 13 19 50.08 +48 30 46.7          17.8 RQEY071213
    CK18W020 KC2018 12 16.11122 13 20 54.55 +48 46 44.1          17.7 NqEY071157
    CK18W020 KC2018 12 16.11700 13 20 55.01 +48 46 50.4          17.5 NqEY071157
    CK18W020 KC2018 12 16.12225 13 20 55.33 +48 46 55.8          17.8 NqEY071157
    CK18W020 KC2018 12 16.12751 13 20 55.72 +48 47 01.3          17.8 NqEY071157
    CK18W020  C2018 12 20.79646 13 26 25.03 +50 12 35.9          17.6 TmEY071349
    CK18W020  C2018 12 20.81093 13 26 26.02 +50 12 53.1                mEY071349
 
Observer details:
157 Frasso Sabino.  Observers R. Haver, R. Gorelli.  Measurer R. Haver.
    0.37-m f/6.70 Cassegrain + CCD.
213 Observatorio Montcabre.  Observer R. Naves.  Measurer M. Campas.  0.30-m
    f/10 Schmidt-Cassegrain.
349 Ageo.  Observer K. Kadota.  0.25-m f/5.0 reflector + CCD.
461 University of Szeged, Piszkesteto Stn. (Konkoly).  Observers A. Bodi,
    K. Sarneczky, R. Szakats.  Measurer K. Sarneczky.  0.60-m Schmidt +
    CCD.
703 Catalina Sky Survey.  Observer E. J. Christensen.  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.
850 Cordell-Lorenz Observatory, Sewanee.  Observers D. T. Durig,
    L. G. Cleveland.  0.3-m f/7.6 Schmidt-Cassegrain + 1536x1024 CCD.
970 Chelmsford.  Observer N. James.  0.28-m f/10 Schmidt-Cassegrain + CCD.
I81 Tarbatness Observatory, Portmahomack.  Observer D. Buczynski.  0.35-m
    Schmidt-Cassegrain + CCD + f/6 focal reducer.
J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers
    A. Knoefel, D. Koschny, M. Busch, M. Micheli, E. Schwab.  1.0-m f/4.4
    reflector + CCD.
L06 Sormano 2 Observatory, Bellagio Via Lattea.  Observer G. Ventre.
    Measurers G. Ventre, P. Sicoli.  0.28-m f/10 reflector + CCD.
Q11 Shinshiro.  Observer T. Ikemura.  Measurer H. Sato.  0.35-m f/5 reflector
    + CCD.
U69 iTelescope SRO Observatory, Auberry.  Observers G. van Buitenen,
    H. Sato.  0.61-m f/6.5 astrograph + CCD.
 
Orbital elements:
    C/2018 W2 (Africano)
Epoch 2019 Aug. 25.0 TT = JDT 2458720.5
T 2019 Sept. 6.03562 TT                                 MPCW
q   1.4532888            (2000.0)            P               Q
z  +0.0010989      Peri.  158.08696     +0.92190902     +0.38634273
 +/-0.0005674      Node   181.83886     +0.04789642     -0.04018037
e   0.9984030      Incl.  116.61303     +0.38443425     -0.92147970
>From 88 observations 2018 Nov. 27-Dec. 20, mean residual 0".5.

    C/2018 W2 (Africano)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T 2019 Sept. 6.03516 TT                                 MPCW
q   1.4532923            (2000.0)            P               Q
z  +0.0010999      Peri.  158.08575     +0.92190648     +0.38635072
 +/-0.0005674      Node   181.83720     +0.04787511     -0.04019538
e   0.9984016      Incl.  116.61339     +0.38444300     -0.92147569
>From 88 observations 2018 Nov. 27-Dec. 20, mean residual 0".5.

Ephemeris:
    C/2018 W2 (Africano)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 11 26    12 58 02.9 +43 59 10   3.9079  3.8216    77.7    14.6  18.3
...
2018 12 11    13 14 58.7 +47 21 34   3.5751  3.6743    88.0    15.5  17.9
...
2018 12 19    13 24 17.6 +49 38 46   3.4042  3.5954    93.2    15.9  17.7
...
2018 12 25    13 31 25.4 +51 36 10   3.2815  3.5359    96.8    16.0  17.6
2018 12 26    13 32 37.4 +51 56 59   3.2616  3.5260    97.4    16.1  17.5
2018 12 27    13 33 49.8 +52 18 09   3.2419  3.5161    98.0    16.1  17.5
...
2019 01 02    13 41 08.9 +54 32 48   3.1273  3.4565   101.3    16.2  17.4
...
2019 01 10    13 51 09.3 +57 52 37   2.9868  3.3768   104.9    16.3  17.2
...
2019 01 25    14 10 59.9 +65 04 50   2.7692  3.2267   109.0    16.8  16.8

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-Y71



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