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  1. #1
    Martin R. Howell's Avatar
    Martin R. Howell Guest

    Default Virtual Moon Atlas's "minimum instrument" recommendation




    Tonight, the skies cleared up just a bit to reveal a bright and quite
    nearly 11 day old moon. I grabbed my 7 x 50 binoculars to take a look at
    it about 15 minutes ago, and was struck by a strikingly beautiful wide
    arc-like feature with its open side facing the illuminated part of the
    moon. I was gazing at the 242 x 157 mile dimensioned crater shaped
    formation "Sinus Iridum," and was able to see enough detail to make it a
    really fascinating object through my binos. Virtual Moon Atlas, which
    provided me with the just cited info, also asserts that the minimum
    instrument for this object is 10x binoculars. . .and therein lies my
    quandary. I was able to thoroughly appreciate the view of Sinus Iridum
    through an instrument with an objective almost a third smaller than the
    "minimum instrument" suggested by VMA. Hmmmmmm. I wonder how good a job
    the minimum instrument must do to meet that criteria.



    --
    Martin R. Howell
    "Photographs From the Universe of Amateur Astronomy"
    http://members.isp.com/universeofama...nomy%40isp.com

  2. #2
    William Hamblen's Avatar
    William Hamblen Guest

    Default Virtual Moon Atlas's "minimum instrument" recommendation

    On Wed, 18 May 2005 22:49:00 -0700, "Martin R. Howell"
    <martinhowell@ilikestarsisp.com> wrote:


    I think the authors of the VMA made their minimum instrument
    recommendations non-minimum enough so that they would not disappoint
    their readers.


 

 

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