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Re: [comets-ml] Comet 2007 W1 Boattini obs

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  • John Drummond
    Here s a photo of Boattini from Friday 4th April 2008 (.40 UT) through the 16 Newtonian @ f5.2 with an SBIG STL11000M CCD. A nucleus is evident in the photo,
    Message 1 of 5 , Apr 5, 2008
      Here's a photo of Boattini from Friday 4th April 2008 (.40 UT) through the 16" Newtonian @ f5.2 with an SBIG STL11000M CCD. A nucleus is evident in the photo, but this is probably a by product of processing - as I also couldn't clearly see a nucleus through my other 16" (Dob)...

      1 minute sub exposures - 5 x luminance, 3 x RGB. The FOV = ~1 degree by .66 degrees.

      http://www.possumobservatory.co.nz/comet_boatini-2007w1-41cm@f5,2-1min-5lum-1x1,3rgb-2x2-25c-080404-drummond-web.jpg
      or
      http://tinyurl.com/6k3nwc

      Cheers

      John Drummond
      Possum Observatory (IAU Code: E94)
      Gisborne, New Zealand
      E 177° 53', S 38° 38'
      Email: john_drummond@...
      Website: http://www.possumobservatory.co.nz
      Images: http://www.possumobservatory.co.nz/latest_images-all-continuing.htm



      ----- Original Message -----
      From: David Seargent
      To: comets-ml@yahoogroups.com
      Sent: Saturday, April 05, 2008 6:03 PM
      Subject: Re: [comets-ml] Comet 2007 W1 Boattini obs


      Michael Mattiazzo wrote

      My visual observation of comet C/2007 W1 Boattini this evening
      2008 April 2.40 UT: m1=10.1, Dia.=4', DC=2...25x100mm B...Michael Mattiazzo
      (Castlemaine, Victoria)
      This comet appears brighter than its predicted ephemeris by nearly a full
      magnitude.

      Michael and all,

      Exactly! In large binoculars, the comet is a good magnitude brighter than predicted. On April 3, I made it 9.9 in a 10-cm binocular telescope at 25x.

      But it is very diffuse and without much condensation.

      Regards,

      David Seargent

      [Non-text portions of this message have been removed]





      [Non-text portions of this message have been removed]
    • Mr Wyatt
      Just making my obs for W1. C/2007 W1 Boattini Date: 08/04/06 Time: 12:33 UT Inst: 10 f/5 dob, 40mm plossl Est mag: 9.2 Est dia: 7.79 DC: 3 No tail was
      Message 2 of 5 , Apr 6, 2008
        Just making my obs for W1.

        C/2007 W1 Boattini

        Date: 08/04/06
        Time: 12:33 UT
        Inst: 10" f/5 dob, 40mm plossl

        Est mag: 9.2
        Est dia: 7.79'
        DC: 3

        No tail was observed visually, the central condensation is a little
        stronger, im really surprised at how this comet is changing in the space of
        48 hours since my last obs.
        Diameter estimate was obtained using drift timings, i also estimated the
        diameter using fraction of FOV and made it out at 8' (1/12th FOV)

        Cheers!
        Chris Wyatt
        Walcha, NSW
        Australia


        -----Original Message-----
        From: comets-ml@yahoogroups.com [mailto:comets-ml@yahoogroups.com]On
        Behalf Of John Drummond
        Sent: Sunday, 6 April 2008 9:14 AM
        To: Comet-Images@yahoogroups.com; comets-ml@yahoogroups.com
        Subject: Re: [comets-ml] Comet 2007 W1 Boattini obs


        Here's a photo of Boattini from Friday 4th April 2008 (.40 UT) through the
        16" Newtonian @ f5.2 with an SBIG STL11000M CCD. A nucleus is evident in the
        photo, but this is probably a by product of processing - as I also couldn't
        clearly see a nucleus through my other 16" (Dob)...

        1 minute sub exposures - 5 x luminance, 3 x RGB. The FOV = ~1 degree by
        .66 degrees.


        http://www.possumobservatory.co.nz/comet_boatini-2007w1-41cm@f5,2-1min-5lum-
        1x1,3rgb-2x2-25c-080404-drummond-web.jpg
        or
        http://tinyurl.com/6k3nwc

        Cheers

        John Drummond
        Possum Observatory (IAU Code: E94)
        Gisborne, New Zealand
        E 177° 53', S 38° 38'
        Email: john_drummond@...
        Website: http://www.possumobservatory.co.nz
        Images:
        http://www.possumobservatory.co.nz/latest_images-all-continuing.htm

        ----- Original Message -----
        From: David Seargent
        To: comets-ml@yahoogroups.com
        Sent: Saturday, April 05, 2008 6:03 PM
        Subject: Re: [comets-ml] Comet 2007 W1 Boattini obs

        Michael Mattiazzo wrote

        My visual observation of comet C/2007 W1 Boattini this evening
        2008 April 2.40 UT: m1=10.1, Dia.=4', DC=2...25x100mm B...Michael
        Mattiazzo
        (Castlemaine, Victoria)
        This comet appears brighter than its predicted ephemeris by nearly a full
        magnitude.

        Michael and all,

        Exactly! In large binoculars, the comet is a good magnitude brighter than
        predicted. On April 3, I made it 9.9 in a 10-cm binocular telescope at 25x.

        But it is very diffuse and without much condensation.

        Regards,

        David Seargent

        [Non-text portions of this message have been removed]

        [Non-text portions of this message have been removed]




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