[Iaude] MPEC J23: COMET C/2020 H6 (ATLAS)

mpec at marsden.cfa.harvard.edu mpec at marsden.cfa.harvard.edu
Sat May 2 22:03:35 EDT 2020


M.P.E.C. 2020-J23                                   Issued 2020 May 3, 01:56 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/2020 H6 (ATLAS)                             

     This object was reported on Apr. 23 UT by J. Robinson and A. Fitzsimmons
on behalf of ATLAS (T05) as being cometary, noting a 10" coma.  Additional
reports of cometary features are as follows:

OC   Date        Reporter           Coma    Tail    PA          Exposures
323  2020-04-26  P. Camilleri         5"                         5x120s
Q62  2020-04-28  E. Guido            10"                        10x120s

Observations:
    CK20H060* C2020 04 22.34303311 55 23.71 -49 22 30.8          18.18cVEJ023T05
    CK20H060  C2020 04 22.34626011 55 23.54 -49 22 28.9          18.82cVEJ023T05
    CK20H060  C2020 04 22.35186211 55 23.37 -49 22 25.8          18.80cVEJ023T05
    CK20H060  C2020 04 22.36251811 55 23.10 -49 22 19.2          18.64cVEJ023T05
    CK20H060 KC2020 04 24.38082 11 54 27.43 -49 01 43.0          18.8 VqEJ023E94
    CK20H060 KC2020 04 24.39092 11 54 27.11 -49 01 36.8          18.9 VqEJ023E94
    CK20H060 KC2020 04 24.40102 11 54 26.81 -49 01 30.6          18.8 VqEJ023E94
    CK20H060 KC2020 04 24.41066 11 54 26.53 -49 01 24.7          18.8 VqEJ023E94
    CK20H060 1C2020 04 24.63613 11 54 20.42 -48 59 04.9                VEJ023Q62
    CK20H060 1C2020 04 24.63950 11 54 20.27 -48 59 03.3          18.5 GVEJ023Q62
    CK20H060 KC2020 04 25.02345 11 54 10.30 -48 55 04.7          18.3 VUEJ023X31
    CK20H060 KC2020 04 25.02798 11 54 10.21 -48 55 01.1          18.2 VUEJ023X31
    CK20H060 KC2020 04 25.04588 11 54 09.66 -48 54 51.1          19.2 VUEJ023X31
    CK20H060 KC2020 04 25.38638311 54 00.76 -48 51 18.2          18.7 GVEJ023R57
    CK20H060 KC2020 04 25.39188311 54 00.62 -48 51 14.5          18.6 GVEJ023R57
    CK20H060 KC2020 04 25.39371811 54 00.52 -48 51 13.4          18.8 GVEJ023R57
    CK20H060 KC2020 04 25.39555211 54 00.44 -48 51 12.4          18.7 GVEJ023R57
    CK20H060 KC2020 04 26.50651 11 53 31.97 -48 39 34.2          18.8 VqEJ023323
    CK20H060 KC2020 04 26.53569 11 53 31.16 -48 39 16.3          18.6 VqEJ023323
    CK20H060 KC2020 04 27.51192 11 53 06.91 -48 28 58.1          19.3 VqEJ023323
    CK20H060 KC2020 04 27.55281 11 53 05.89 -48 28 31.2          18.6 VqEJ023323
    CK20H060  C2020 04 28.40834011 52 45.34 -48 19 23.6          18.7 GVEJ023474
    CK20H060  C2020 04 28.41231811 52 45.24 -48 19 20.9          18.7 GVEJ023474
    CK20H060  C2020 04 28.41629611 52 45.16 -48 19 18.3          18.8 GVEJ023474
    CK20H060 0C2020 04 28.43712 11 52 44.72 -48 19 05.2          19.1 GVEJ023Q62
    CK20H060 0C2020 04 28.44653 11 52 44.40 -48 18 59.3          19.6 GVEJ023Q62
    CK20H060 KC2020 04 28.54873 11 52 41.98 -48 17 53.6          19.2 VqEJ023323
    CK20H060 KC2020 04 28.57553 11 52 41.44 -48 17 37.3          17.5 VqEJ023323
    CK20H060 KC2020 04 29.13720 11 52 28.18 -48 11 34.4          18.4 VqEJ023X31
    CK20H060 KC2020 04 29.14410 11 52 28.00 -48 11 29.4          18.5 VqEJ023X31
    CK20H060 3C2020 04 29.14722 11 52 27.99 -48 11 27.9          18.8 GVEJ023W88
    CK20H060 KC2020 04 29.15148 11 52 27.85 -48 11 25.3          18.6 VqEJ023X31
    CK20H060 3C2020 04 29.15288 11 52 27.73 -48 11 24.0          18.6 GVEJ023W88
    CK20H060 3C2020 04 29.15866 11 52 27.64 -48 11 19.9          18.6 GVEJ023W88
    CK20H060 KC2020 04 29.54712 11 52 18.81 -48 07 08.9          18.7 VqEJ023323
    CK20H060 KC2020 04 29.57449 11 52 18.16 -48 06 51.6          18.4 VqEJ023323
    CK20H060 4C2020 04 30.00841 11 52 08.46 -48 02 09.3          18.4 VqEJ023W88
    CK20H060 4C2020 04 30.05006 11 52 07.46 -48 01 42.8          18.3 VqEJ023W88
    CK20H060  C2020 04 30.10058 11 52 06.25 -48 01 09.9          18.3 RqEJ023X74
    CK20H060  C2020 04 30.11434 11 52 05.91 -48 01 00.8          18.3 RqEJ023X74
    CK20H060  C2020 04 30.12815 11 52 05.63 -48 00 51.0          18.4 RqEJ023X74
    CK20H060  C2020 04 30.13174 11 52 05.53 -48 00 49.4          18.4 RqEJ023X74
    CK20H060  C2020 04 30.14560 11 52 05.17 -48 00 40.4          18.3 RqEJ023X74
    CK20H060  C2020 04 30.15943 11 52 04.80 -48 00 31.3          18.0 RqEJ023X74
    CK20H060 KC2020 04 30.54080 11 51 56.49 -47 56 22.0          18.8 VqEJ023E23
    CK20H060 KC2020 04 30.55437 11 51 56.08 -47 56 14.2          18.7 VqEJ023E23
    CK20H060 KC2020 04 30.56858 11 51 55.86 -47 56 03.4          18.5 VqEJ023E23
    CK20H060 KC2020 05 02.42976 11 51 16.37 -47 35 40.4          19.0 VqEJ023E23
    CK20H060 KC2020 05 02.44344 11 51 16.12 -47 35 31.2          19.2 VqEJ023E23
    CK20H060 KC2020 05 02.45733 11 51 15.85 -47 35 22.5          19.2 VqEJ023E23
    CK20H060 KC2020 05 02.95115 11 51 05.99 -47 29 54.6          18.5 VUEJ023X31
    CK20H060 KC2020 05 02.95617 11 51 05.88 -47 29 51.4          18.7 VUEJ023X31
    CK20H060 KC2020 05 02.96119 11 51 05.76 -47 29 48.2          18.4 VUEJ023X31

Observer details:
323 Perth Observatory, Bickley.  Observers P. Camilleri, J. Oey, R. Groom.  
    Measurer P. Camilleri.  0.34-m f/5 reflector + CCD.
474 Mount John Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M. 
   Kilmartin.  Measurer P. M. Kilmartin.  1.0-m f/7.7 reflector + CCD.
E23 Arcadia.  Observer A. Hidas.  0.35-m f/1.9 reflector + CCD.
E94 Possum Observatory, Gisborne.  Observer J. Drummond.  0.35-m f/10 
   Schmidt-Cassegrain + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observers H. Sato, A. Valvasori, E. 
   Guido.  0.51-m f/6.8 astrograph + CCD + f/4.5 focal reducer, 0.50-m f/6.8 
   astrograph + CCD + focal reducer.
R57 Aorangi Iti Observatory, Lake Tekapo.  Observers A. C. Gilmore, P. M. 
   Kilmartin.  Measurer P. M. Kilmartin.  0.35-m f/11 Schmidt-Cassegrain + CCD.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, J. Tonry, A. Heinze, H. 
   Weiland, H. Flewelling.  Measurers L. Denneau, J. Tonry, A. Heinze, H. 
   Weiland, H. Flewelling, B. Stalder, A. Fitzsimmons, J. Robinson, N. Erasmus. 
    0.5-m reflector + CCD.
W88 Slooh.com Chile Observatory, La Dehesa.  Observers B. Lutkenhoner, G. 
   Gasparovic, Y. Chen.  Measurers B. Lutkenhoner, G. Gasparovic, Y. Chen, G. 
   Y. Gasparovic.  0.43-m f/6.8 Corrected Dall-Kirkham + CCD.
X31 Galileo Galilei Observatory, Oro Verde.  Observer C. Fornari.  0.40-m f/8 
   Ritchey-Chretien + CCD.
X74 Observatorio Campo dos Amarais.  Observer L. S. Amaral.  0.3-m f/4 
   reflector + CCD.

Orbital elements:
    C/2020 H6 (ATLAS)                                                           
T 2021 Oct. 1.29404 TT                                  Rudenko                 
q   4.6890842            (2000.0)            P               Q                  
                   Peri.   20.53028     -0.74370815     +0.38340220             
                   Node   213.80530     -0.66255533     -0.31369265             
e   1.0            Incl.   79.83077     +0.08898659     +0.86867697             
>From 53 observations 2020 Apr. 22-May 2.                                        
                                                                                
Ephemeris:
Date    TT    R. A. (2000) Decl.     Delta      r    Elong.  Phase   m1    m2
2020 04 03    12 06 26.1 -52 12 19   5.5890  6.3050   132.3     6.7  18.7
...
2020 04 18    11 57 33.7 -50 05 09   5.4816  6.2318   135.0     6.5  18.6
...
2020 04 26    11 53 44.8 -48 44 54   5.4474  6.1932   134.4     6.7  18.6
...
2020 05 02    11 51 25.3 -47 40 25   5.4325  6.1643   133.0     6.9  18.6
2020 05 03    11 51 04.9 -47 29 23   5.4309  6.1595   132.7     6.9  18.6
2020 05 04    11 50 45.4 -47 18 16   5.4296  6.1547   132.4     6.9  18.6
...
2020 05 10    11 49 05.9 -46 10 21   5.4267  6.1261   130.1     7.2  18.5
...
2020 05 18    11 47 41.6 -44 37 30   5.4363  6.0882   126.2     7.7  18.5
...
2020 06 02    11 47 32.5 -41 42 46   5.4924  6.0178   116.8     8.7  18.5

M. P. C. Staff               (C) Copyright 2020 MPC           M.P.E.C. 2020-J23




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