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> 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. Astro-ph/0308329 describes eclipsing binary with late K star and a brown dwarf as components. The brown dwarf secondary does not seem to be established with certainty, though. One might also want to look to astro-ph/0301322 for a brown dwarf microlens candidate and astro-ph/0306398 for a mysterious unexplained 46 min modulation in one young brown dwarf. Anyway, brown dwarfs are too red, too faint and have too low amplitude for me to observe. Best regards, Ondrej Pejcha > 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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