[Iaude] MPEC A20: COMET P/2018 Y2 (Africano)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Wed Jan 2 13:21:17 EST 2019


M.P.E.C. 2019-A20                                Issued 2019 Jan. 2, 18:01 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 P/2018 Y2 (Africano)

     B. M. Africano (G96) reported this object as a potential comet.  He
described that the object showed a compact 8"-10" coma and a potential 5"-10"
tail in p.a. 275 in four co-added 40-s images.   D. Bamberger (Z80) reported
the object appeared fuzzy (FWHM 6", compared to 3".8 for nearby stars) in 120
stacked 10-s images.  R. Weryk (568) reported the object has a 1".20 FWHM
(compared to 0".76 +/- 0".03 for nearby stars) and an obvious 10" tail in p.a.
280.
 
Observations:
    PK18Y020  C2018 12 10.41553 06 57 04.40 +28 17 16.0          19.4 GVEA020G96
    PK18Y020  C2018 12 10.42069 06 57 04.24 +28 17 15.6          19.3 GVEA020G96
    PK18Y020  C2018 12 10.42584 06 57 04.08 +28 17 15.5          19.5 GVEA020G96
    PK18Y020  C2018 12 10.43099 06 57 03.92 +28 17 15.0          19.8 GVEA020G96
    PK18Y020  C2018 12 17.77281 06 53 05.77 +28 09 06.9          19.9 RqEA020D29
    PK18Y020  C2018 12 17.79048 06 53 05.14 +28 09 05.3          19.3 RqEA020D29
    PK18Y020  C2018 12 17.80816 06 53 04.49 +28 09 03.8          20.0 RqEA020D29
    PK18Y020* C2018 12 31.29428 06 44 42.68 +27 49 06.0          19.2 GVEA020G96
    PK18Y020  C2018 12 31.29941 06 44 42.48 +27 49 05.3          19.1 GVEA020G96
    PK18Y020  C2018 12 31.30453 06 44 42.27 +27 49 04.9          19.1 GVEA020G96
    PK18Y020  C2018 12 31.30967 06 44 42.08 +27 49 04.4          19.2 GVEA020G96
    PK18Y020  C2018 12 31.33052 06 44 41.25 +27 49 02.3          19.1 GVEA020G96
    PK18Y020  C2018 12 31.34204 06 44 40.79 +27 49 01.1          19.1 GVEA020G96
    PK18Y020  C2018 12 31.35090 06 44 40.42 +27 49 00.1          19.1 GVEA020G96
    PK18Y020  C2018 12 31.35966 06 44 40.07 +27 48 58.9          19.1 GVEA020G96
    PK18Y020  C2018 12 31.47780 06 44 35.40 +27 48 46.3          18.7 GVEA020G96
    PK18Y020  C2018 12 31.48682 06 44 35.14 +27 48 45.3          18.7 GVEA020G96
    PK18Y020 IC2018 12 31.88733006 44 19.79 +27 48 03.1          19.8 GVEA020L01
    PK18Y020 IC2018 12 31.88970606 44 19.73 +27 48 02.4          19.8 GVEA020L01
    PK18Y020 KC2018 12 31.92095606 44 18.50 +27 47 59.2          19.4 GVEA020L01
    PK18Y020 KC2018 12 31.92354706 44 18.42 +27 47 58.9          19.6 GVEA020L01
    PK18Y020  C2018 12 31.93685 06 44 17.88 +27 47 57.4          19.6 RoEA020K88
    PK18Y020  C2018 12 31.94322 06 44 17.66 +27 47 56.7          19.7 RoEA020K88
    PK18Y020 9C2019 01 01.20030 06 44 07.49 +27 47 29.8          19.2 GVEA020G40
    PK18Y020 9C2019 01 01.23852 06 44 06.03 +27 47 25.0          19.3 GVEA020G40
    PK18Y020 |C2019 01 01.37731 06 44 00.77 +27 47 10.8                VEA020H06
    PK18Y020 |C2019 01 01.37906 06 44 00.71 +27 47 10.7          19.0 GVEA020H06
    PK18Y020 KC2019 01 01.77689 06 43 45.60 +27 46 26.5          19.2 VqEA020C77
    PK18Y020 KC2019 01 01.80214 06 43 44.65 +27 46 24.6          20.1 VqEA020C77
    PK18Y020 KC2019 01 01.84231 06 43 43.09 +27 46 19.7          19.4 VqEA020C77
    PK18Y020 KC2019 01 01.89558 06 43 40.99 +27 46 14.1          18.4 RtEA020B49
    PK18Y020 KC2019 01 01.90405 06 43 40.66 +27 46 13.9          19.0 RtEA020B49
    PK18Y020 KC2019 01 01.90543 06 43 40.61 +27 46 13.5          19.0 RtEA020B49
    PK18Y020 KC2019 01 01.94819406 43 38.85 +27 46 07.7          18.0 GVEA020Z80
    PK18Y020 KC2019 01 01.95282406 43 38.69 +27 46 07.5          18.0 GVEA020Z80
    PK18Y020 KC2019 01 01.95745406 43 38.59 +27 46 06.2          18.1 GVEA020Z80
    PK18Y020 KC2019 01 01.96208306 43 38.45 +27 46 06.0          18.1 GVEA020Z80
    PK18Y020 KC2019 01 01.99604 06 43 37.02 +27 46 03.4          19.3 RrEA020106
    PK18Y020 KC2019 01 02.00109 06 43 36.86 +27 46 02.3          19.8 RrEA020106
    PK18Y020 KC2019 01 02.00613 06 43 36.63 +27 46 01.9          18.9 RrEA020106
    PK18Y020 ^C2019 01 02.33954406 43 23.934+27 45 27.04         19.36GVEA020568
    PK18Y020 ^C2019 01 02.34132806 43 23.862+27 45 26.84         19.33GVEA020568
    PK18Y020 ^C2019 01 02.34256906 43 23.813+27 45 26.70         19.37GVEA020568
 
Observer details:
106 Crni Vrh.  Observer S. Maticic.  0.6-m f/3.3 Deltagraph + CCD.
568 Mauna Kea.  Observers R. Wainscoat, C. Crowder, T. Burdullis.  Measurers
    R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
B49 Paus Observatory, Sabadell.  Observer J. Camarasa.  0.30-m f/4 Newtonian
    reflector + CCD.
C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4.0 reflector + CCD.
D29 Purple Mountain Observatory, XuYi Station.  Observers H. B. Zhao, B. Li,
    G. Zhaori, R. Q. Hong, L. F. Hu.  Measurers H. B. Zhao, B. Li, H. Lu,
    G. Zhaori.  1.04-m f/1.8 Schmidt + CCD.
G40 Slooh.com Canary Islands Observatory.  Observer B. Lutkenhoner.  0.43-m
    f/6.8 Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey.  Observers D. C. Fuls, 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.  1.5-m reflector + 10K CCD.
H06 iTelescope Observatory, Mayhill.  Observer H. Sato.  0.43-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  1.02-m
    Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican.  Observers K. Korlevic, V. Perovic, P. Kukic,
    M. Nikic, A. Radica.  Measurer K. Korlevic.  1.0-m f/2.9 reflector + CCD.
Z80 Northolt Branch Observatory.  Observer G. Wells.  Measurer D. Bamberger.
    0.25-m f/8.0 Ritchey-Chretien + CCD.
 
Orbital elements:
    P/2018 Y2 (Africano)
Epoch 2018 Dec. 28.0 TT = JDT 2458480.5
T 2018 Dec. 20.13276 TT                                 MPCW
q   3.8737559            (2000.0)            P               Q
n   0.04779072     Peri.  160.20995     -0.13920598     -0.97418333
a   7.5203894      Node   297.43991     +0.87944596     -0.03912025
e   0.4848996      Incl.   11.55229     +0.45518841     -0.22234310
P  20.62
>From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.

    P/2018 Y2 (Africano)
Epoch 2039 July 31.0 TT = JDT 2466000.5
T 2039 July 15.29180 TT                                 MPCW
q   3.8724654            (2000.0)            P               Q
n   0.04779547     Peri.  160.08114     -0.13606227     -0.97461089
a   7.5198916      Node   297.38464     +0.87965228     -0.03627978
e   0.4850371      Incl.   11.55239     +0.45573998     -0.22094656
P  20.62
>From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.

    P/2018 Y2 (Africano)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T 2018 Dec. 20.04936 TT                                 MPCW
q   3.8737038            (2000.0)            P               Q
n   0.04781661     Peri.  160.19814     -0.13899244     -0.97421094
a   7.5176747      Node   297.43911     +0.87945311     -0.03891911
e   0.4847205      Incl.   11.55325     +0.45523987     -0.22225739
P  20.61
>From 43 observations 2018 Dec. 10-2019 Jan. 2, mean residual 0".4.

Ephemeris:
    P/2018 Y2 (Africano)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 12 03    07 00 22.3 +28 24 02   3.0128  3.8752   146.8     8.0  19.8
...
2018 12 18    06 52 58.0 +28 08 50   2.9213  3.8738   163.2     4.2  19.7
...
2018 12 26    06 48 05.5 +27 57 47   2.8983  3.8739   171.6     2.1  19.7
...
2019 01 01    06 44 15.5 +27 47 52   2.8936  3.8744   175.3     1.2  19.7
2019 01 02    06 43 36.9 +27 46 04   2.8939  3.8745   175.1     1.2  19.7
2019 01 03    06 42 58.4 +27 44 14   2.8945  3.8747   174.7     1.3  19.7
...
2019 01 09    06 39 11.0 +27 32 22   2.9044  3.8756   169.6     2.6  19.7
...
2019 01 17    06 34 28.6 +27 14 30   2.9343  3.8775   161.0     4.7  19.7
...
2019 02 01    06 27 39.3 +26 36 16   3.0381  3.8825   144.5     8.5  19.8

Gareth V. Williams           (C) Copyright 2019 MPC           M.P.E.C. 2019-A20



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