[vsnet-alert 25681] Re: Possible Nova in Sgr

walcom77 walcom77@gmail.com via vsnet-alert vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Thu Apr 8 05:59:13 JST 2021

Dear Andrew

Congrats for the discovery of V6595 SAGITTARII = NOVA SAGITTARII 2021 No. 2.

Our blog post about this transient:


Direct link to our image of this nova:


Direct link to an animation showing a comparison between our image and
the archive POSS1 plate (1996-09-12):


With kind regards,

Ernesto Guido, Adriano Valvasori, Marco Rocchetto

On Mon, Apr 5, 2021 at 12:22 AM Andrew Pearce <a.tpearce at bigpond.com> wrote:
> I’d like to report a discovery of a possible nova in Sagittarius.  I was using a Canon 1100D DSLR camera with a 100mm f/2.8 lens.  Total exposure time was 20 seconds (2 x 10s images stacked).
> Apr 4.825 UT
> RA 17 58 16.7
> Dec -29 14 49
> Unfiltered magnitude estimate - 8.4
> I visually confirmed the suspect and estimated the magnitude as 8.8 on April 4.857 UT.
> I have not been able to perform astrometry as my DSLR images don’t allow it (10.8 arc sec per pixel).   The position is estimated off the image compared to Guide 9 data.
> The suspect is located close to V3895 Sgr but I’ve confirmed that it is distinct from it.
> The suspect was also seen on 2 other exposures (20s each) at the same time with no evidence of motion.
> Previous observations are shown below
> Apr 1.791  [11.0
> Mar 27.794 [11.0
> I have checked for minor planets via the Minor Planet Checker and there was no minor planets within 10’ of the position to magnitude 12.  I have checked the DSS image and can see no star at the location down to approximate 17th mag.
> I have also checked the GCVS and the AAVSO VSX database and no known variable star is at this position (V3895 Sgr is close by).
> This has been reported to the CBAT.
> Regards
> Andrew Pearce
> W.Australia

More information about the vsnet-alert mailing list