[vsnet-chat 4575] Re: HD 235749 (was Re: new Tycho variables...)

["Sebastian Otero" <varsao@sinectis.com.ar>]

> > HD 235749 / 8.81, 1.71 ; 8.93, 1.60
> > This one seems to be an ordinary red variable deserving attention !!!
>
>    Not an ordinary red variable!  The star has a composite spectrum
> of OB+M (according to the LS catalog), and is cataloged as an emission
> line object.  VV Cep-type?  Symbiotic-like object?
>
>    The object has a NSV name: NSV25855 (9.01-9.30V).  Those who are
> going to make observing reports on this object are strongly recommended
> to use this designation.
>
> Regards,
> Taichi Kato

Very interesting!
I didn't make any identification but to search for photometry !!

In spite of the faint NSV range, PEP(V) magnitudes and even Tycho 2
magnitude (V= 8.91) are brighter.
Actually the star is included in a list of VV Cep-type stars observed
photometrically in Miroscnichenko and Ivanov, 1993, from which the NSV
magnitudes comes from. The color of the star was measured between 1.57 and
1.76 (B-V).
But the star was first classified as VV Cep by Barbier as early as 1971.
So the amplitude is greater than catalogued:  8.8 - 9.3 V at least.


Regards,
Sebastian.


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