Re: how bright would the James Webb scope be

From: George Roberts (gr@gr5.org)
Date: Mon Dec 14 2009 - 16:34:28 UTC

  • Next message: Marco Langbroek: "SATOBS ML (4353), 13 Dec 2009 (pt. II): USA 198"

    Yes - very faint!  Four times farther than the moon!  It's pretty hard to see
    objects in geosynch orbit and this would be about 40 times farther away than
    geosynch.  On the other hand it should be almost always flaring as the solar
    panels and sun shield will face back towards both the earth and the sun which
    are all lined up.  So if a geosat can flare to mag 4, and this is 40 times
    farther away, wouldn't it be 40^2 times fainter (1600 times fainter) or about 8
    magnitudes fainter?
    
    - George Roberts
    http://gr5.org
    
    
    ----- Original Message ----- 
    From: "Kevin Fetter" <kfetter@yahoo.com>
    To: <seesat-l@satobs.org>
    Sent: Monday, December 14, 2009 8:08 AM
    Subject: how bright would the James Webb scope be
    
    
    > Some one asked on another list, who bright the  James Webb scope be.
    >
    > Info on the space telescope.
    >
    > http://www.jwst.nasa.gov/about.html
    >
    > I said it would be faint, but I could be wrong.
    >
    > Kevin
    >
    >
    >      __________________________________________________________________
    > Looking for the perfect gift? Give the gift of Flickr!
    >
    > http://www.flickr.com/gift/
    >
    > -------------------------------------------------------------------------
    > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:
    > http://www.satobs.org/seesat/seesatindex.html
    >
    > 
    
    -------------------------------------------------------------------------
    Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive:  
    http://www.satobs.org/seesat/seesatindex.html
    



    This archive was generated by hypermail 2b29 : Mon Dec 14 2009 - 16:35:12 UTC