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M101 maximum wavelength

  1. Sep 27, 2007 #1
    What is the maximum wavelength of m101 seen from the Earth by eye?
  2. jcsd
  3. Sep 27, 2007 #2


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    Do you mean longest wavelength? If so, that would be red (~700 nm). The H-alpha is the most intense emission line.

    http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?letter=.&classic=YES&bibcode=1985AJ.....90..192D&page=&type=SCREEN_VIEW&data_type=PDF_HIGH&send=GET&filetype=.pdf [Broken]

    If you mean brightest wavelength, I haven't a clue.
    Last edited by a moderator: May 3, 2017
  4. Sep 28, 2007 #3
    longest, thanks
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