[Iaude] MPEC Q34: COMET P/2018 P3 (PANSTARRS)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Sat Aug 18 16:17:17 EDT 2018


M.P.E.C. 2018-Q34                                Issued 2018 Aug. 18, 19:54 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 P3 (PANSTARRS)

     R. Weryk (F51) reported that the Aug. 8 images of this object showed a
~1".3 FWHM (compared to the stellar 1".05) and a 6" tail in P.A. 255.
R. Wainscoat (568, Aug. 10) reported images with a 1".05 FWHM (stellar 0".75)
and a 10" tail slightly south of west.
 
Observations:
    PK18P030* C2018 08 08.54438 00 14 07.672-17 14 22.51         21.0 wUEQ034F51
    PK18P030  C2018 08 08.55556 00 14 07.993-17 14 24.62         20.9 wUEQ034F51
    PK18P030  C2018 08 08.56676 00 14 08.316-17 14 26.77         20.8 wUEQ034F51
    PK18P030  C2018 08 08.57793 00 14 08.639-17 14 28.81         20.8 wUEQ034F51
    PK18P030 KC2018 08 10.42287 00 15 05.34 -17 20 26.2          20.0 GUEQ034734
    PK18P030 KC2018 08 10.42762 00 15 05.45 -17 20 27.0          20.0 GUEQ034734
    PK18P030 KC2018 08 10.43238 00 15 05.58 -17 20 27.8          20.0 GUEQ034734
    PK18P030 _C2018 08 10.55190900 15 09.180-17 20 49.77         20.8 GVEQ034568
    PK18P030 _C2018 08 10.55286400 15 09.203-17 20 49.96         20.5 GVEQ034568
    PK18P030 _C2018 08 10.55381400 15 09.227-17 20 50.15         20.6 GVEQ034568
    PK18P030 1C2018 08 12.62745 00 16 04.55 -17 27 45.1                VEQ034Q62
    PK18P030 1C2018 08 12.63122 00 16 04.62 -17 27 45.6          20.9  VEQ034Q62
    PK18P030 KC2018 08 13.05554500 16 14.67 -17 29 25.3          20.2 GVEQ034L01
    PK18P030 KC2018 08 13.09710600 16 15.51 -17 29 34.6          20.1 GVEQ034L01
    PK18P030 HC2018 08 14.36537 00 16 43.91 -17 34 02.9          20.4 RoEQ034691
    PK18P030 HC2018 08 14.38024 00 16 44.16 -17 34 06.3          20.0 RoEQ034691
    PK18P030 HC2018 08 14.39575 00 16 44.41 -17 34 10.0          20.1 RoEQ034691
    PK18P030 KC2018 08 17.04608 00 17 32.49 -17 43 55.1          19.2 GVEQ034104
    PK18P030 KC2018 08 17.06068 00 17 32.72 -17 43 58.7          19.2 GVEQ034104
 
Observer details:
104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri, G. Succi.
    Measurers P. Bacci, L. Tesi, G. Fagioli.  0.6-m f/4.0 reflector + CCD.
568 Mauna Kea.  Observers R. J. Wainscoat, D. Woodworth.  Measurers
    M. Micheli, R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch.  Observer R. A. Mastaler.
    0.9-m f/3 reflector + CCD.
734 Farpoint Observatory, Eskridge.  Observer G. Hug.  0.69-m reflector + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
    M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
    M. Huber, E. Magnier, Y. Ramanjooloo, R. Wainscoat, C. Waters, R. Weryk.
    1.8-m Ritchey-Chretien + CCD.
L01 Visnjan Observatory, Tican.  Observers K. Korlevic, F. Hrzenjak,
    G. Kervina, E. Pettarin, A. Dragovic.  Measurer E. Pettarin.  1.0-m f/2.9
    reflector + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
 
Orbital elements:
    P/2018 P3 (PANSTARRS)
Epoch 2018 Oct. 9.0 TT = JDT 2458400.5
T 2018 Oct.  9.17341 TT                                 MPCW
q   1.7584133            (2000.0)            P               Q
n   0.18817644     Peri.  305.64225     +0.98784415     -0.08005280
a   3.0159621      Node    59.29738     +0.13369662     +0.87485504
e   0.4169644      Incl.    8.91519     -0.07930411     +0.47772398
P   5.24
>From 22 observations 2018 Aug. 8-17, mean residual 0".4.

    P/2018 P3 (PANSTARRS)
Epoch 2024 Jan. 11.0 TT = JDT 2460320.5
T 2024 Jan. 3.87192 TT                                  MPCW
q   1.7526383            (2000.0)            P               Q
n   0.18846410     Peri.  305.76939     +0.98773478     -0.08136879
a   3.0128924      Node    59.24725     +0.13488181     +0.87459526
e   0.4182871      Incl.    8.92079     -0.07865690     +0.47797725
P   5.23
>From 22 observations 2018 Aug. 8-17, mean residual 0".4.

    P/2018 P3 (PANSTARRS)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Oct.  9.16420 TT                                 MPCW
q   1.7584844            (2000.0)            P               Q
n   0.18820878     Peri.  305.63483     +0.98785374     -0.07993260
a   3.0156166      Node    59.29782     +0.13359065     +0.87487161
e   0.4168740      Incl.    8.91522     -0.07936330     +0.47771377
P   5.24
>From 22 observations 2018 Aug. 8-17, mean residual 0".4.

Ephemeris:
    P/2018 P3 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 07 19    23 56 47.4 -16 36 19   1.1348  1.8847   122.3    27.1  20.5
...
2018 08 03    00 10 37.3 -16 58 41   0.9999  1.8446   132.6    23.9  20.2
...
2018 08 11    00 15 21.7 -17 22 13   0.9391  1.8259   138.4    21.6  20.0
...
2018 08 17    00 17 31.7 -17 43 36   0.8992  1.8133   143.0    19.6  19.9
2018 08 18    00 17 46.1 -17 47 21   0.8931  1.8113   143.8    19.3  19.8
2018 08 19    00 17 58.5 -17 51 08   0.8871  1.8093   144.5    18.9  19.8
...
2018 08 25    00 18 29.5 -18 13 57   0.8544  1.7983   149.1    16.8  19.7
...
2018 09 02    00 17 17.6 -18 41 54   0.8199  1.7856   154.8    13.9  19.6
...
2018 09 17    00 10 13.7 -19 06 55   0.7859  1.7682   161.5    10.4  19.5

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-Q34



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