[vsnet-alert 26136] Re: RS Ophiuchi eruption confirmed

[Hiroyuki Maehara]

According to Kojima-san, RS Oph was in quiescence on Aug 8.487.

object         YYYYMMDD(UT)   mag      code
OPHRS          20210808.487   117c     TKo

Observer: Tadashi Kojima (Gunma, Japan)
Instruments: f.l.=300mm lens + Canon EOS 6D


On Mon, Aug 09, 2021 at 13:48:59, JBD wrote:
> I would like to propose this spectrum of RS-OPH done despite cloud cover 
> of more than 25% and done with an alpy-600.
> 
> Stacks of 9 images of 500 sec.
> 
> Jean-Bruno Desrosiers (JBD)
> Observatoire du Mont St-Joseph.
> http://omsj.info | AAVSO: DJED
> Latitude : N45.26' | Longitude : O71 06'
> 
> Le 2021-08-09 à 00:01, Kirill Sokolovsky a écrit :
> > YYYYMMDD(UT) mag
> > 20210809.12432  4.77V
> >
> > Preliminary photometry with the 0.6m telescope of Michigan State 
> > University.
> > Assuming V= 9.34 for the comparison star HD 162215.
> >
> > Best wishes,
> > Kirill Sokolovsky
> >