[Iaude] MPEC U285: COMET C/2023 Q2 (PANSTARRS)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Mon Oct 30 15:45:04 EDT 2023


M.P.E.C. 2023-U285                             Issued 2023 October 30, 19:42 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets, routine data on comets and natural satellites,
         and occasional editorial announcements.  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/2023 Q2 (PANSTARRS)                           

     R. Weryk reports cometary activity of an asteroidal NEOCP candidate
(initially reporte by Pan-STARRS 2 - F52 on Aug. 23 UT) in four 60-second
follow-up images taken by CFHT (T09) on Sep. 9 UT, noting a very condensed
coma and a broad 3" tail at position angle 65-120 deg. Weryk's follow-up
images from CFHT on Oct. 13 UT confirmed a very condensed 0".1 coma and
a broad 10" tail at position angle 30-100 deg. Prediscovery images from 
Pan-STARRS2 were reported from July 2023.

Observations:
    CK23Q020  C2023 07 06.57298119 41 25.860+61 54 27.28         21.08GVEU285F52
    CK23Q020  C2023 07 06.58698819 41 24.037+61 54 24.25         21.17GVEU285F52
    CK23Q020* C2023 08 23.25322018 15 42.953+51 55 52.05         21.14wXEU285F52
    CK23Q020  C2023 08 23.26593918 15 42.141+51 55 37.09         21.16wXEU285F52
    CK23Q020  C2023 08 23.27863718 15 41.331+51 55 21.90         21.62wXEU285F52
    CK23Q020  C2023 08 23.29131618 15 40.497+51 55 06.70         21.14wXEU285F52
    CK23Q020  C2023 08 23.38223318 15 34.588+51 53 18.13         20.87GVEU285F51
    CK23Q020  C2023 08 23.38305218 15 34.532+51 53 17.16         21.12GVEU285F51
    CK23Q020 1C2023 08 23.94594 18 14 59.19 +51 42 02.8          21.0 VXEU285033
    CK23Q020 1C2023 08 23.94832 18 14 59.04 +51 42 00.0          21.3 VXEU285033
    CK23Q020 1C2023 08 23.95046 18 14 58.90 +51 41 57.4          21.2 VXEU285033
    CK23Q020 KC2023 08 24.07975718 14 51.01 +51 39 23.2          20.7 VuEU285H21
    CK23Q020 KC2023 08 24.08255618 14 50.79 +51 39 19.4          21.0 VuEU285H21
    CK23Q020 KC2023 08 24.09386618 14 50.11 +51 39 06.2          20.6 VuEU285H21
    CK23Q020 pC2023 08 24.89733618 14 01.05 +51 22 56.4          20.7 GVEU285L01
    CK23Q020 KC2023 08 24.90007118 14 00.78 +51 22 53.4          20.9 GVEU285L01
    CK23Q020 pC2023 08 24.90238418 14 00.69 +51 22 50.5          21.0 GVEU285L01
    CK23Q020 pC2023 08 24.90492218 14 00.59 +51 22 48.0          20.8 GVEU285L01
    CK23Q020 pC2023 08 24.90746018 14 00.44 +51 22 45.5          20.6 GVEU285L01
    CK23Q020 KC2023 08 25.13515818 13 46.76 +51 18 09.4          21.0 VuEU285H21
    CK23Q020 KC2023 08 25.14214918 13 46.33 +51 18 00.6          20.9 VuEU285H21
    CK23Q020 KC2023 08 25.14494518 13 46.16 +51 17 57.2          20.9 VuEU285H21
    CK23Q020  C2023 08 25.29654418 13 37.077+51 14 53.41         20.9 GVEU285654
    CK23Q020  C2023 08 25.30297218 13 36.627+51 14 44.63         20.9 GVEU285654
    CK23Q020 KC2023 08 25.85252418 13 04.49 +51 03 36.1          20.5 GXEU285L01
    CK23Q020 KC2023 08 25.85877718 13 04.09 +51 03 28.4          20.3 GXEU285L01
    CK23Q020 KB2023 08 25.85912 18 13 04.12 +51 03 28.1          21.5 RZEU285106
    CK23Q020 KC2023 08 25.86571118 13 03.76 +51 03 19.1          20.2 GXEU285L01
    CK23Q020 KB2023 08 25.86628 18 13 03.66 +51 03 19.1          20.8 RZEU285106
    CK23Q020  C2023 08 29.29476018 09 56.519+49 52 34.59         21.08GVEU285F51
    CK23Q020  C2023 08 29.29557618 09 56.461+49 52 33.65         21.25GVEU285F51
    CK23Q020 1C2023 09 01.17487318 07 37.944+48 51 44.09               LEU285658
    CK23Q020 1C2023 09 01.18045118 07 37.699+48 51 37.13               LEU285658
    CK23Q020 1C2023 09 01.18490718 07 37.519+48 51 30.97               LEU285658
    CK23Q020 1C2023 09 01.18937518 07 37.297+48 51 25.37               LEU285658
    CK23Q020 1C2023 09 01.19383118 07 37.107+48 51 19.66               LEU285658
    CK23Q020 KC2023 09 01.80942818 07 09.61 +48 38 10.8                XEU285595
    CK23Q020 KC2023 09 01.82183018 07 09.09 +48 37 54.5          20.6 GXEU285595
    CK23Q020 KC2023 09 01.83461018 07 08.52 +48 37 38.3                XEU285595
    CK23Q020 KC2023 09 02.82808818 06 25.71 +48 16 19.0          20.6 GVEU285L06
    CK23Q020 KC2023 09 02.83259318 06 25.62 +48 16 13.6          20.3 GVEU285587
    CK23Q020 KC2023 09 02.83612318 06 25.45 +48 16 09.2          20.3 GVEU285587
    CK23Q020 KC2023 09 02.83965318 06 25.28 +48 16 04.3          20.5 GVEU285587
    CK23Q020 KC2023 09 02.84736218 06 24.87 +48 15 54.3          20.5 GVEU285L06
    CK23Q020 KC2023 09 02.88093 18 06 23.47 +48 15 11.3          20.4 GVEU285104
    CK23Q020 KC2023 09 02.89134 18 06 23.04 +48 14 57.0                VEU285104
    CK23Q020 KC2023 09 02.89796 18 06 22.76 +48 14 48.9          21.0 GVEU285104
    CK23Q020 KB2023 09 04.84347 18 05 04.966+47 32 42.47         19.1 GXEU285L38
    CK23Q020 KB2023 09 04.84773 18 05 04.829+47 32 37.03         19.2 GXEU285L38
    CK23Q020 KB2023 09 04.86192 18 05 04.296+47 32 18.20         20.5 GXEU285L38
    CK23Q020 KB2023 09 05.84701 18 04 27.605+47 10 50.38         18.9 GXEU285L38
    CK23Q020 KC2023 09 05.85735 18 04 27.15 +47 10 36.3          20.5 V EU285A77
    CK23Q020 KB2023 09 05.85765 18 04 27.149+47 10 36.41         19.6 GXEU285L38
    CK23Q020 KB2023 09 05.86829 18 04 26.810+47 10 21.65         20.4 GXEU285L38
    CK23Q020 KC2023 09 05.87884 18 04 26.32 +47 10 08.5          20.9 V EU285A77
    CK23Q020 KC2023 09 05.89956 18 04 25.53 +47 09 41.0          21.3 V EU285A77
    CK23Q020 0C2023 09 06.18700 18 04 15.32 +47 03 24.2                VEU285U94
    CK23Q020 0C2023 09 06.19697 18 04 14.98 +47 03 11.0          20.2 GVEU285U94
    CK23Q020 KB2023 09 06.83789 18 03 52.514+46 49 08.04         20.6 GXEU285L38
    CK23Q020 KC2023 09 06.84362 18 03 52.37 +46 49 01.1          20.9 RqEU285C10
    CK23Q020 KB2023 09 06.84853 18 03 52.190+46 48 54.14         20.9 GXEU285L38
    CK23Q020 KB2023 09 06.85918 18 03 51.859+46 48 40.10         20.7 GXEU285L38
    CK23Q020 KC2023 09 06.86909 18 03 51.47 +46 48 27.5          20.8 RqEU285C10
    CK23Q020 KC2023 09 06.89456 18 03 50.55 +46 47 53.9          20.7 RqEU285C10
    CK23Q020 1C2023 09 08.16114618 03 08.513+46 20 02.53               LEU285658
    CK23Q020 1C2023 09 08.16561318 03 08.391+46 19 56.74               LEU285658
    CK23Q020 1C2023 09 08.17008118 03 08.243+46 19 50.74               LEU285658
    CK23Q020 1C2023 09 08.17453718 03 08.131+46 19 44.76               LEU285658
    CK23Q020 1C2023 09 08.17900518 03 07.968+46 19 38.92               LEU285658
    CK23Q020 KB2023 09 08.83659 18 02 47.299+46 05 07.91         20.2 GXEU285L38
    CK23Q020 KB2023 09 08.86019 18 02 46.560+46 04 35.94         20.5 GXEU285L38
    CK23Q020 3C2023 09 09.23586418 02 35.161+45 56 19.49         20.95GVEU285T14
    CK23Q020 3C2023 09 09.23707518 02 35.124+45 56 17.90         20.97GVEU285T14
    CK23Q020 3C2023 09 09.23828618 02 35.085+45 56 16.28         21.01GVEU285T14
    CK23Q020 3C2023 09 09.23949718 02 35.049+45 56 14.67         20.95GVEU285T14
    CK23Q020 !C2023 09 13.17514 18 00 50.15 +44 28 41.7          20.6 RVEU285673
    CK23Q020 !C2023 09 13.18644 18 00 49.83 +44 28 26.2                VEU285673
    CK23Q020 !C2023 09 15.19019 18 00 06.62 +43 43 36.9          21.2 RVEU285673
    CK23Q020 !C2023 09 15.21288 18 00 06.16 +43 43 05.6                VEU285673
    CK23Q020  C2023 09 18.24689217 59 13.178+42 35 01.54         21.18wXEU285F51
    CK23Q020  C2023 09 18.25953717 59 12.977+42 34 44.46         21.16wXEU285F51
    CK23Q020  C2023 09 18.27216617 59 12.772+42 34 27.45         21.02wXEU285F51
    CK23Q020  C2023 09 18.28481017 59 12.570+42 34 10.29         21.07wXEU285F51
    CK23Q020 0C2023 09 21.16931217 58 35.612+41 29 23.14         20.70GVEU285G96
    CK23Q020 0C2023 09 21.17500017 58 35.544+41 29 15.00         20.32GVEU285G96
    CK23Q020 0C2023 09 21.18068117 58 35.508+41 29 07.73               VEU285G96
    CK23Q020 0C2023 09 21.18635217 58 35.454+41 29 00.06         20.93GVEU285G96
    CK23Q020 KB2023 09 22.89446 17 58 19.346+40 50 41.35         20.8 VZEU285J57
    CK23Q020 KB2023 09 22.91473 17 58 19.176+40 50 13.99         21.4 VZEU285J57
    CK23Q020 KC2023 09 24.84057 17 58 06.149+40 07 06.60         19.1 GXEU285L38
    CK23Q020 KC2023 09 24.86490 17 58 06.034+40 06 33.48         19.2 GXEU285L38
    CK23Q020 KC2023 09 26.15588 17 58 00.15 +39 37 44.8          20.1 RoEU285291
    CK23Q020 KC2023 09 26.17385 17 58 00.05 +39 37 20.3          20.1 RoEU285291
    CK23Q020 KC2023 09 26.17839 17 58 00.03 +39 37 14.4          20.3 RoEU285291
    CK23Q020 KC2023 10 03.10271 17 58 05.35 +37 04 02.6          20.6 RoEU285291
    CK23Q020 KC2023 10 03.10559 17 58 05.40 +37 03 58.5          20.7 RoEU285291
    CK23Q020 KC2023 10 03.10848 17 58 05.35 +37 03 54.5                oEU285291
    CK23Q020 KC2023 10 04.99096917 58 16.85 +36 22 48.2          19.9 GXEU285W62
    CK23Q020 KC2023 10 04.99486917 58 16.89 +36 22 42.9          19.8 GXEU285W62
    CK23Q020 KC2023 10 04.99841117 58 16.93 +36 22 38.6                XEU285W62
    CK23Q020 KB2023 10 08.81127317 58 52.304+35 00 19.31         20.7 VZEU285Y89
    CK23Q020 KB2023 10 08.82610017 58 52.476+34 59 58.78         19.6 VZEU285Y89
    CK23Q020 KB2023 10 08.84075817 58 52.797+34 59 41.70         21.3 VZEU285Y89
    CK23Q020 KC2023 10 09.10696 17 58 55.61 +34 53 59.0                VEU285691
    CK23Q020 KC2023 10 09.11284 17 58 55.67 +34 53 52.1          19.6 RVEU285691
    CK23Q020 KC2023 10 10.75676 17 59 16.20 +34 18 51.2          18.6 GVEU285C82
    CK23Q020 KC2023 10 10.76976 17 59 16.55 +34 18 32.5          20.0 GVEU285C82
    CK23Q020 KC2023 10 11.73016 17 59 29.69 +33 58 12.8          20.8 GVEU285C82
    CK23Q020 KC2023 10 11.74101 17 59 29.87 +33 57 59.5          20.9 GVEU285C82
    CK23Q020 KC2023 10 11.74102 17 59 29.91 +33 58 00.5          20.8 GVEU285C82
    CK23Q020 3C2023 10 13.22410817 59 52.177+33 26 49.70         20.87GVEU285T14
    CK23Q020 3C2023 10 13.22532017 59 52.196+33 26 48.13         20.89GVEU285T14
    CK23Q020 3C2023 10 13.22652817 59 52.212+33 26 46.66         20.85GVEU285T14
    CK23Q020 3C2023 10 13.22773817 59 52.234+33 26 45.19         20.82GVEU285T14
    CK23Q020  C2023 10 21.21392218 02 27.399+30 43 22.31         20.69wXEU285F51
    CK23Q020  C2023 10 21.22607618 02 27.670+30 43 07.99         20.92wXEU285F51
    CK23Q020  C2023 10 21.23821518 02 27.944+30 42 53.46         20.63wXEU285F51
    CK23Q020  C2023 10 21.25033618 02 28.210+30 42 39.00         20.64wXEU285F51
    CK23Q020 DC2023 10 29.08329 18 05 50.90 +28 10 52.5          20.7 GVEU285695
    CK23Q020 DC2023 10 29.09675 18 05 51.27 +28 10 37.3          20.8 GVEU285695
    CK23Q020 DC2023 10 29.11021 18 05 51.65 +28 10 22.0          20.8 GVEU285695

Observer details:
033 Karl Schwarzschild Observatory, Tautenburg.  Observers S. Melnikov, C.
    Hoegner, F. Ludwig, M. Hartmann, B. Stecklum.  Measurer B. Stecklum.
    1.34-m f/3 Schmidt + CCD.
104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers
    P. Bacci, L. Tesi, G. Fagioli.  0.60-m F4 Reflector + CCD.
106 Crni Vrh.  Observer H. Mikuz.  0.60-m f/3.3 reflector + CMO.
291 LPL/Spacewatch II.  Observers M. T. Read, C. Lejoly.  1.8-m f/2.7
    reflector + CCD.
587 Sormano.  Observer E. Colzani.  Measurer P. Sicoli.  0.5-m f/6.8 reflector
    + CCD.
595 Farra d'Isonzo.  Observers G. D'Agostino, G. Panterotto, E. Pettarin.
    Measurer G. D'Agostino.  0.61-m f/4.5 reflector + 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.
658 National Research Council of Canada.  Observers D. D. Balam, C. E. Spratt.
    Measurers D. D. Balam, D. W. E. Green.  1.82-m Reflector + CCD.
673 Table Mountain Observatory, Wrightwood.  Observer J. Pittichova.  1.0-m
    f/15 reflector + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch.  Observer J. V. Scotti.  0.9-m
    f/3 reflector + CCD.
695 Kitt Peak.  Observer J. V. Scotti.  2.3-m f/9 reflector + CCD.
A77 Observatoire Chante-Perdrix, Dauban.  Observer F. Kugel.  0.40-m f/2.8
    reflector + CCD.
C10 Maisoncelles.  Observer J.-F. Soulier.  0.30-m f/3.8 Newtonian reflector +
    CCD.
C82 Osservatorio Astronomico Nastro Verde, Sorrento.  Observer N. Ruocco.
    0.35-m f/6.3  Schmidt-Cassegrain + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, K. Chambers, T. Lowe, P.
    Minguez, A. Schultz, I. Smith.  Measurers S. Chastel, J. Fairlamb, M.
    Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, J.
    Bulger, H. Gao, C.-C. Lin, T. Lowe, E. Magnier, P. Minguez, A. Schultz, I.
    Smith.  1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala.  Observers J. Bulger, K. Chambers, T. Dukes, T.
    Lowe, P. Minguez, A. Schultz, I. Smith.  Measurers S. Chastel, J.
    Fairlamb, M. Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers,
    T. de Boer, J. Bulger, H. Gao, C.-C. Lin, T. Lowe, E. Magnier, P. Minguez,
    A. Schultz, I. Smith.  1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observer J. K. Hogan.  Measurers R. Bankowski, T. G.
    Fisher, X. Liao, B. G. McCaskill, I. A. Terentev, P. Maiorana, E.
    Chaghafi, M. T. Mazzucato, V. Gonano, 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.  1.5-m reflector + 10K CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Linder, R. Holmes, L. Horn.  0.76-m f/3.0 astrograph + CCD.
J57 Centro Astronomico Alto Turia, Valencia.  Observer A. Fornas.  Measurers
    A. Fornas, G. Fornas, E. Arce, V. Mas.  0.43-m f/6.8 Reflector 0.4m + CMO.
L01 Visnjan Observatory, Tican.  Observers K. Korlevic, M. Markovic, E.
    Pettarin.  Measurers K. Korlevic, E. Pettarin.  1.0-m f/2.9 reflector +
    CCD, 1.00-m f/2.9 reflector + CCD.
L06 Sormano 2 Observatory, Bellagio Via Lattea.  Observer G. Ventre.  Measurer
    P. Sicoli.  0.36m Schmidt Cassegrain + CCD.
L38 Gartensternwarte Schafsweide, Sehlde.  Observer A. Opitz.  0.35-m f/5.2
    Newton + CMO, 0.35-m f/4.6 Newton + CCD.
T14 Canada-France-Hawaii Telescope, Maunakea.  Observers R. Wainscoat, A.
    Acohido, T. Burdullis, L. Wells.  Measurers R. Weryk, R. Wainscoat.  3.6-m
    Canada-France-Hawaii Telescope + CCD.
U94 iTelescope Observatory, Beryl Junction.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
W62 Comet Hunter Observatory2, New Ringgold.  Observer J. Maikner.  0.30-m
    f/3.8 Riccardi-Honders + CCD.
Y89 Proxima Centauri Observatory, Valdin.  Observer R. Hahn.  0.36-m f/2.0
    reflector + CMO.

Orbital elements:
    C/2023 Q2 (PANSTARRS)                                                       
Epoch 2023 Sept. 13.0 TT = JDT 2460200.5                                        
T 2024 June 24.10809 TT                                 Rudenko                 
q   3.2093420            (2000.0)            P               Q                  
z  +0.0029628      Peri.  171.72941     +0.08122358     -0.23331460             
 +/-0.0000097      Node    92.68339     -0.96095077     +0.23970154             
e   0.9904914      Incl.  104.05411     -0.26453042     -0.94239454             
>From 121 observations 2023 July 6-Oct. 29, mean residual 0".4.                  
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2023 09 30    17 57 55.7 +38 12 21   4.0050  4.0708    86.6    14.2  20.6
...
2023 10 15    18 00 21.8 +32 49 49   4.0653  3.9892    78.6    14.2  20.6
...
2023 10 23    18 03 09.6 +30 08 00   4.1052  3.9467    73.9    14.0  20.5
...
2023 10 29    18 05 48.6 +28 12 28   4.1371  3.9153    70.3    13.8  20.5
2023 10 30    18 06 17.6 +27 53 43   4.1425  3.9101    69.7    13.8  20.5
2023 10 31    18 06 47.2 +27 35 08   4.1479  3.9050    69.1    13.7  20.5
...
2023 11 06    18 09 58.1 +25 46 50   4.1804  3.8742    65.4    13.5  20.5
...
2023 11 14    18 14 44.2 +23 31 22   4.2228  3.8339    60.5    13.0  20.5
...
2023 11 29    18 24 55.8 +19 45 37   4.2927  3.7606    51.6    11.9  20.4

M. P. C. Staff               (C) Copyright 2023 MPC           M.P.E.C. 2023-U285




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