[Iaude] MPEC M104: COMET C/2022 L4 (PANSTARRS)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Wed Jun 29 20:47:20 EDT 2022


M.P.E.C. 2022-M104                                Issued 2022 June 30, 00:44 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/2022 L4 (PANSTARRS)                           

     R. Weryk reports cometary activity of an asteroidal NEOCP candidate 
(initially reported by Pan-STARRS 2 on Jun. 4 UT) in three 60-second gri-band
follow-up images obtained by CFHT (568), noting a very condensed 0".1 coma and
a broad 4" tail at position angle 60-120 deg.  Weryk also reports additional
activity in follow-up from CFHT on Jun. 6 UT, noting a condensed 0".1 coma
and a broad 4" tail at position angle 60-110 deg.

Observations:
    CK22L040* C2022 06 04.39626417 04 16.676-12 19 59.48         21.40wUEM104F52
    CK22L040  C2022 06 04.40654417 04 15.087-12 20 04.08         21.04wUEM104F52
    CK22L040  C2022 06 04.41688017 04 13.465-12 20 08.12         21.88wUEM104F52
    CK22L040  C2022 06 04.42718917 04 11.898-12 20 12.25         20.81wUEM104F52
    CK22L040  C2022 06 04.48439117 04 02.915-12 20 36.02         21.58GVEM104F52
    CK22L040  C2022 06 04.48502117 04 02.819-12 20 36.46         21.38GVEM104F52
    CK22L040 KC2022 06 05.34116917 01 50.732-12 26 26.48         20.73GVEM104I52
    CK22L040 KC2022 06 05.34291317 01 50.437-12 26 27.35         20.29GVEM104I52
    CK22L040 KC2022 06 05.34465817 01 50.171-12 26 27.78         21.19GVEM104I52
    CK22L040 ^C2022 06 05.53626417 01 20.466-12 27 45.49         21.45GVEM104568
    CK22L040 ^C2022 06 05.53807417 01 20.214-12 27 45.97         20.38GVEM104568
    CK22L040 ^C2022 06 05.53998417 01 19.924-12 27 46.90         20.82GVEM104568
    CK22L040 ^C2022 06 05.54885417 01 18.560-12 27 50.42         20.21GVEM104568
    CK22L040 ^C2022 06 05.55147417 01 18.134-12 27 51.41         21.52GVEM104568
    CK22L040 |C2022 06 06.11675 16 59 51.27 -12 31 38.5          21.1 GVEM104807
    CK22L040 |C2022 06 06.12784 16 59 49.52 -12 31 43.1          21.0 GVEM104807
    CK22L040 |C2022 06 06.13153 16 59 48.92 -12 31 44.6          21.1 GVEM104807
    CK22L040 KC2022 06 06.30033816 59 22.870-12 32 56.30         21.48GVEM104I52
    CK22L040 KC2022 06 06.31025016 59 21.330-12 33 01.20               VEM104I52
    CK22L040 ^C2022 06 06.43270316 59 02.488-12 33 49.46         21.07GVEM104568
    CK22L040 ^C2022 06 06.43747316 59 01.737-12 33 51.38         20.72GVEM104568
    CK22L040 ^C2022 06 06.44623316 59 00.363-12 33 54.97         20.57GVEM104568
    CK22L040 KC2022 06 07.38525 16 56 36.01 -12 40 13.6          21.4 RoEM104691
    CK22L040 KC2022 06 07.39951 16 56 33.79 -12 40 19.6          21.3 RoEM104691
    CK22L040 KC2022 06 07.41377 16 56 31.62 -12 40 25.5                oEM104691
    CK22L040  C2022 06 10.26518016 49 16.639-12 59 19.06         21.0 GVEM104654
    CK22L040  C2022 06 10.33013416 49 06.725-12 59 43.34         20.6 GVEM104654
    CK22L040  C2022 06 10.36339716 49 01.704-12 59 56.72         21.0 GVEM104654
    CK22L040  C2022 06 10.38393016 48 58.568-13 00 04.84         21.0 GVEM104654
    CK22L040 KC2022 06 11.30663 16 46 39.23 -13 06 05.1          21.7 RoEM104291
    CK22L040 KC2022 06 11.32285 16 46 36.74 -13 06 11.6                oEM104291
    CK22L040 KC2022 06 11.33905 16 46 34.30 -13 06 17.2                oEM104291
    CK22L040 ^C2022 06 20.42009016 24 35.888-14 02 23.28         21.36GVEM104568
    CK22L040 ^C2022 06 20.42129816 24 35.718-14 02 23.74         21.62GVEM104568
    CK22L040 ^C2022 06 20.42250516 24 35.550-14 02 24.11         21.62GVEM104568
    CK22L040 1C2022 06 20.53742 16 24 19.71 -14 03 01.5                VEM104Q62
    CK22L040 1C2022 06 20.54856 16 24 18.16 -14 03 05.4          20.7 GVEM104Q62
    CK22L040 KC2022 06 25.09692116 14 07.40 -14 29 04.1                XEM104W62
    CK22L040 KC2022 06 25.11540516 14 05.00 -14 29 11.6                XEM104W62
    CK22L040 KC2022 06 25.13327516 14 02.55 -14 29 15.9                XEM104W62
    CK22L040 ^C2022 06 27.25723516 09 31.181-14 40 53.25         22.49GVEM104568
    CK22L040 ^C2022 06 27.25844416 09 31.028-14 40 53.59         22.12GVEM104568
    CK22L040 ^C2022 06 27.25965516 09 30.875-14 40 54.01         22.15GVEM104568

Observer details:
291 LPL/Spacewatch II.  Observer J. V. Scotti.  1.8-m f/2.7 reflector + CCD.
568 Mauna Kea.  Observers K. Ejercito, Z. Bailey, Y. Ramanjooloo, R.
    Wainscoat, H. Januszewski, T. Burdullis, L. Wells, H. Flewelling.
    Measurers R. Weryk, Y. Ramanjooloo, R. Wainscoat.  2.24-m University of
    Hawaii reflector + CCD, 3.6-m Canada-France-Hawaii Telescope + CCD.
654 Table Mountain Observatory, Wrightwood-PHMC.  Observers N. Evans, P. Choi,
    N. Saini, C. Zhai, R. Trahan, M. Shao.  1.0-m Reflector + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch.  Observer J. V. Scotti.  0.9-m
    f/3 reflector + CCD.
807 Cerro Tololo Observatory, La Serena.  Observers T. Linder, R. Holmes, L.
    Horn.  1.00-m f/10.0 astrograph + CCD.
F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz, I.
    Smith, K. Chambers, T. Dukes.  Measurers K. Chambers, S. Chastel, T. de
    Boer, J. Fairlamb, H. Gao, M. Huber, C.-C. Lin, E. Magnier, Y.
    Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station.  Observer G. J. Leonard.
    Measurers E. J. Christensen, D. Fay, J. B. Fazekas, D. C. Fuls, A. R.
    Gibbs, A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M.
    Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A. Serrano, F. C. Shelly,
    K. W. Wierzchos.  1.0-m prime focus + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD.
W62 Comet Hunter Observatory2, New Ringgold.  Observer J. Maikner.  0.30-m
    f/3.8 Riccardi-Honders + CCD.

Orbital elements:
    C/2022 L4 (PANSTARRS)                                                       
Epoch 2022 Aug. 9.0 TT = JDT 2459800.5                                          
T 2021 Dec. 8.71152 TT                                  Rudenko                 
q   3.0149292            (2000.0)            P               Q                  
z  +0.0037045      Peri.  125.31732     +0.34671122     -0.74314716             
 +/-0.0000004      Node    66.04963     -0.92492136     -0.37230057             
e   0.9888311      Incl.  141.22854     +0.15592246     -0.55598974             
>From 43 observations 2022 June 4-27, mean residual 0".3.                        
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2022 05 31    17 15 36.1 -11 49 36   2.4643  3.4543   165.2     4.3  21.3
...
2022 06 15    16 37 30.0 -13 29 32   2.5392  3.5259   163.8     4.6  21.5
...
2022 06 23    16 18 44.3 -14 17 15   2.6288  3.5656   153.2     7.4  21.6
...
2022 06 29    16 05 55.3 -14 50 11   2.7161  3.5961   145.0     9.3  21.7
2022 06 30    16 03 54.3 -14 55 27   2.7322  3.6013   143.6     9.6  21.7
2022 07 01    16 01 55.5 -15 00 39   2.7487  3.6064   142.2     9.9  21.8
...
2022 07 07    15 50 49.1 -15 30 46   2.8556  3.6376   134.1    11.6  21.9
...
2022 07 15    15 38 06.8 -16 08 26   3.0165  3.6800   123.8    13.3  22.1
...
2022 07 30    15 20 29.6 -17 14 38   3.3580  3.7619   105.7    15.1  22.4

M. P. C. Staff               (C) Copyright 2022 MPC           M.P.E.C. 2022-M104




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