SIMBAD references

2004IBVS.5571....1S - IAU Inform. Bull. Var. Stars, 5571, 1 (2004/October-0)

XX Ophiuchi in deep minimum after 37 years.

SOBOTKA P.

Abstract (from CDS):

XX Ophiuchi is a unique object, which is very difficult to classify. This star only slowly varied around the maximum magnitude (V approx 9 mag) during the past 37 years. In March 2004, the brightness started to fade by 0.2 mag per month. I stress the urgent need of the spectroscopic observations during this minimum.

Abstract Copyright: ∼

Journal keyword(s): photometry, deep minimum

CDS comments: = 2005BAVSR..54.40

Simbad objects: 2

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