[vsnet-alert 10464] Re: re-brightening of V1647 Ori = McNeil's nabula

[Taichi Kato]

Re: Subject: [vsnet-alert 10463] re-brightening of V1647 Ori = McNeil's nabula

>   Itagaki-san reported the brightening of V1647 Ori (= IRAS 05436-0007
> = variable star which lights up the McNeil's nebula (IAUC 8284, 8396))
> to mag about 16.7 (unfiltered CCD) on Aug. 26 (detail will be reported
> later).  It was brightened to mag around 15-16 (including nebulosity,
> unfiltered CCD) on 2004 Jan. 23, but faded to mag around 19 (Rc) on
> 2005 Oct. (J.A. Acosta-Pulido et al., 2007).  Confirmation and further
> observation is urgently needed.  

    The object is more likely an EX Lup-type object rather than
an FU Ori-type object.  Repeated outbursts are not vrey unexpected
(see e.g. V1118 Ori, V1143 Ori).  In any case, further observations
are encouraged.