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[vsnet-newvar 2148] (fwd) Brown Dwarf 2MASSI J0746425+200032 Finder Chart



(fwd) Brown Dwarf 2MASSI J0746425+200032 Finder Chart

From: DWest61506@aol.com
Date: Sat, 13 Sep 2003 10:34:45 EDT
Subject: [vsnet-chat 6820] Brown Dwarf 2MASSI J0746425+200032 Finder Chart

It is time for small telescope astronomers to start observing Brown Dwarfs 
(BD), there are a few of them within our reach.  There are extremely faint 
compared to most stars we observe but they are within the reach of CCD cameras.  
Many BD's have been observed to exhibit flares and rotational effects.  I don't 
think any eclipsing BD has every been observed (someone correct me if I'm 
wrong here).  I provided a chart to hopefully stir some interest in this cutting 
edge of astronomy.

Brown Dwarf 2MASSI J0746425+200032 is just now coming back into the morning 
sky ready for observation.  I have made a finder chart and placed it at: 
http://hometown.aol.com/dwest61506/page85.html .  My initial CCD observation is at:  
http://hometown.aol.com/dwest61506/page86.html .  I measured the position of 
the BD at 07 46 42.37 +20 00 32.0 using GSC 1.1 comparison stars coordinates.

Depending on which type of CCD camera you use, your magnitudes will probably 
vary quiet a bit from mine.  Typical of a BD, V-Ic = 4.8, this is very red so 
any comparison star you choose won't be a good color match.  V mag of this BD 
is ~20.

Regards,
Doug West
http://hometown.aol.com/dwest61506/index.html


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