[Iaude] MPEC L36: COMET P/2018 L1 (PANSTARRS)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Fri Jun 8 19:41:19 EDT 2018


M.P.E.C. 2018-L36                                Issued 2018 June 8, 23:31 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 L1 (PANSTARRS)

    This object was reported as a possible comet by R. Weryk who described a
possible short tail to the SE in the F51 June 3 images.  G. Hug (H36) reported
that the object was diffuse with a 8"-10" circular coma in images obtained
on June 4.1 UT.  Weryk later reported that the object was clearly a comet ion
images on June 6.3 UT, with a FWHM 40% larger than neighbouring stars and a
~ 6" tail in P.A. 100.  H. Sato (Q62) reported a 8" strongly-condensed coma,
but no tail in images on June 6.4 UT.
 
Observations:
    PK18L010  C2018 05 18.22708 13 07 03.51 -21 35 34.7                UEL036G96
    PK18L010  C2018 05 18.23240 13 07 03.41 -21 35 32.6          18.8 GUEL036G96
    PK18L010  C2018 05 18.23772 13 07 03.26 -21 35 29.0          19.0 GUEL036G96
    PK18L010  C2018 05 18.24304 13 07 03.09 -21 35 26.2          19.2 GUEL036G96
    PK18L010* C2018 06 03.28457 13 04 11.558-19 27 54.11         20.0 wUEL036F51
    PK18L010  C2018 06 03.29557 13 04 11.563-19 27 49.46         19.9 wUEL036F51
    PK18L010  C2018 06 03.30658 13 04 11.579-19 27 44.76         20.0 wUEL036F51
    PK18L010 KC2018 06 04.12843 13 04 15.47 -19 22 02.0          18.9 GUEL036H36
    PK18L010 KC2018 06 04.13618 13 04 15.55 -19 21 58.3          18.8 GUEL036H36
    PK18L010  C2018 06 04.15860 13 04 15.64 -19 21 50.3          19.0 GUEL036I52
    PK18L010 KC2018 06 04.16031 13 04 15.53 -19 21 48.5          18.5 GUEL036H36
    PK18L010  C2018 06 04.16663 13 04 15.73 -19 21 45.8          19.4 GUEL036I52
    PK18L010  C2018 06 04.17486 13 04 15.68 -19 21 42.5          19.0 GUEL036I52
    PK18L010  C2018 06 04.18321 13 04 15.77 -19 21 39.2          19.2 GUEL036I52
    PK18L010 1C2018 06 04.48975 13 04 17.42 -19 19 27.3                vEL036Q62
    PK18L010 1C2018 06 04.49293 13 04 17.44 -19 19 26.0                vEL036Q62
    PK18L010 1C2018 06 04.49615 13 04 17.46 -19 19 24.7          18.8 wvEL036Q62
    PK18L010 9C2018 06 04.91259 13 04 20.24 -19 16 38.9          19.1 VUEL036G40
    PK18L010 9C2018 06 04.92407 13 04 20.33 -19 16 34.5          19.2 VUEL036G40
    PK18L010 9C2018 06 04.93774 13 04 20.34 -19 16 28.5          19.1 VUEL036G40
    PK18L010 (C2018 06 04.94360 13 04 20.42 -19 16 26.5          19.1 GUEL036G40
    PK18L010 (C2018 06 04.94694 13 04 20.42 -19 16 25.1          19.2 GUEL036G40
    PK18L010 HC2018 06 05.23814 13 04 22.44 -19 14 27.1          19.2 RoEL036691
    PK18L010 HC2018 06 05.24178 13 04 22.49 -19 14 25.7          19.4 RoEL036691
    PK18L010 HC2018 06 05.24541 13 04 22.56 -19 14 24.2          19.2 RoEL036691
    PK18L010 HC2018 06 06.16254 13 04 30.34 -19 08 16.7          19.1 RoEL036691
    PK18L010 HC2018 06 06.17192 13 04 30.36 -19 08 12.9          19.3 RoEL036691
    PK18L010 HC2018 06 06.18125 13 04 30.45 -19 08 09.0          19.4 RoEL036691
    PK18L010 ^C2018 06 06.34178913 04 31.774-19 07 04.44         19.72GVEL036568
    PK18L010 ^C2018 06 06.34296513 04 31.781-19 07 03.97         19.71GVEL036568
    PK18L010 ^C2018 06 06.34414013 04 31.790-19 07 03.48         19.71GVEL036568
    PK18L010  C2018 06 07.19840 13 04 40.65 -19 01 30.9          18.6 GUEL036I52
    PK18L010  C2018 06 07.20688 13 04 40.74 -19 01 27.4          19.2 GUEL036I52
    PK18L010  C2018 06 07.22756 13 04 41.02 -19 01 19.6          18.8 GUEL036I52
    PK18L010 (C2018 06 07.93637 13 04 49.34 -18 56 47.8          19.1 GUEL036G40
    PK18L010 (C2018 06 07.94323 13 04 49.40 -18 56 45.1          19.0 GUEL036G40
 
Observer details:
568 Mauna Kea.  Observers R. Wainscoat, C. Wipper, A. Petric.  Measurers
    R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
691 Steward Observatory, Kitt Peak.  Observer A. F. Tubbiolo.  0.9-m f/3
    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.
G40 Slooh.com Canary Islands Observatory.  Observers B. Lutkenhoner, K. Dankov.
    0.5-m f/6.8 Corrected Dall-Kirkham + CCD.
G96 Mt. Lemmon Survey.  Observers H. Groeller, R. A. Kowalski.  Measurers
    B. M. Africano, E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    H. Groeller, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard,
    R. L. Seaman, F. C. Shelly.  1.5-m reflector + 10K CCD.
H36 Sandlot Observatory, Scranton.  Observer G. Hug.  0.56-m reflector + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observers J. A. Johnson,
    D. C. Fuls, H. Groeller.  Measurers B. M. Africano, E. J. Christensen,
    D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson,
    R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly.
    1.0-m 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 L1 (PANSTARRS)
Epoch 2018 Nov. 18.0 TT = JDT 2458440.5
T 2018 Nov. 12.56594 TT                                 MPCW
q   1.8854738            (2000.0)            P               Q
n   0.14209546     Peri.   17.86403     +0.27946339     +0.94243042
a   3.6370497      Node   268.67580     -0.90182240     +0.19198790
e   0.4815925      Incl.   10.58494     -0.32957027     +0.27379838
P   6.94
>From 36 observations 2018 May 18-June 7, mean residual 0".4.

    P/2018 L1 (PANSTARRS)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Nov. 12.60605 TT                                 MPCW
q   1.8850448            (2000.0)            P               Q
n   0.14202788     Peri.   17.88097     +0.27996372     +0.94229133
a   3.6382034      Node   268.68889     -0.90170100     +0.19247046
e   0.4818748      Incl.   10.58207     -0.32947781     +0.27393826
P   6.94
>From 36 observations 2018 May 18-June 7, mean residual 0".4.

Ephemeris:
    P/2018 L1 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 05 09    13 11 57.5 -22 55 04   1.4920  2.4372   153.5    10.7  19.7
...
2018 05 24    13 05 08.8 -20 46 51   1.5094  2.3672   138.8    16.4  19.6
...
2018 06 01    13 04 07.6 -19 44 17   1.5357  2.3307   131.1    19.1  19.6
...
2018 06 07    13 04 38.6 -19 02 44   1.5616  2.3038   125.5    21.0  19.6
2018 06 08    13 04 50.3 -18 56 20   1.5664  2.2994   124.6    21.3  19.6
2018 06 09    13 05 03.7 -18 50 06   1.5713  2.2950   123.6    21.6  19.6
...
2018 06 15    13 07 03.0 -18 16 13   1.6029  2.2686   118.3    23.2  19.6
...
2018 06 23    13 11 22.0 -17 41 02   1.6500  2.2343   111.6    25.0  19.6
...
2018 07 08    13 24 09.7 -17 05 56   1.7487  2.1725   100.2    27.4  19.6

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-L36



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