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  1. #1
    Willie R. Meghar's Avatar
    Willie R. Meghar Guest

    Default Comet SWAN: Oct. 23rd (U.T.) Observation



    Using tripod-mounted 25x100 binoculars beneath a magnitude 6.5 (at
    zenith) sky I observed Comet C/2006 M4 (SWAN) from 2:05 until 2:30
    U.T.

    The bright, round coma was estimated to have a diameter between 6 and
    7 (closer to 7) minutes of arc. The coma was suspected to have a
    slightly greenish color. It was much brighter at its center; but in
    the binoculars the center was non-stellar in appearance.

    A (very) faint tail 1.0 degrees in length was visible extending in a
    narrow, straight line from the comet's head in a north-northwest
    direction.

    The comet was at an altitude of 29 degrees near the midpoint of this
    observation.

    Willie R. Meghar
    Observational Notes at:
    http://meghar.blogspot.com/

  2. #2
    Willie R. Meghar's Avatar
    Willie R. Meghar Guest

    Default Comet SWAN: Oct. 23rd (U.T.) Observation

    I wrote:


    In case it's relevant to anyone: Change "north-northwest" to
    "north-northeast." I had my sketch labeled correctly; and I had it
    right in my blog (I just checked!); but confusion struck when I made
    the saa posting.

    One of these days I hope to eliminate "east" and "west" from my
    astronomical vocabulary. The terms: "preceding" and "following" tend
    to be more intuitive and less prone to confusion.

    By the way, there's a nice little group of sunspots near the sun's
    north-preceding limb ;-)

    Willie R. Meghar
    Observational Notes at:
    http://meghar.blogspot.com/

 

 

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