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VSX J205126.1+440523 (Alert Notice 425) Has faded from detection

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mgw's picture
VSX J205126.1+440523 (Alert Notice 425) Has faded from detection

Alert 425 highlighted two YSO's - HBC 722 and VSX J205126.1+440523 discovered last year.  The two objects have produced very different light curves over the past 9 months.  HBC 722 has faded about 1 mag and been relatively constant over the past 5 months.  VSX J2051+44 (also known as V2492 Cyg) had rapid Imag variations between ~13.5 to 18.5.  But on June 9 it faded beyond magnitude 21 (using a Clear filter).  During it ~250 days of outburst the brightness appeared to exhibit an ~61 day period variance,  but this is not definite.  Dr. Aspin published a paper in the Astonomical Journal 141:196 (23pp), 2011 June titled "V2492 Cygni: The Early Evolution of the 2010 Outburst" which people may enjoy reading.  I'd encourage others to take occasional images to see if V2492 Cyg goes back into outburst.

pox's picture

Wow - looks like some pretty amazing stuff is happening there.

Even if this is no longer visible in conventional amateur equipment, I would encourage even us visual observers to keep a constant watch for when (if!) it brightens again.

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