I took another set of this little planetary tonight and compared
it to the shot in this thread I took in May last year.
Tonight's set survived a 2x resample before deconvolution and
some sharpening. Deconv sure shows up non-round stars in
your set
A bit of further reading about PK315-0.1 or He-2/111 as it's probably more
commonly known) here by Andrew James of ASNSW. (Enchilada)
http://www.blackskies.org/nsp16.htm
A few facts about He-2/111 : Magnitude 13 , roughly 2000 years old
according to the velocity of the expanding shell.
quote:>>
'While the observed nebulosity is expanding at 24kms-1, Meaburn and Walsh (1989) found
that some regions close to the PNN have an outflow velocity as high as 370km.sec.-1 -
likely one of the fastest "superwind" PNe shell velocities ever measured.<<
Will be almost unobservable in about 500 years due to the proper motion
of Alpha Centauri which lies very nearby, at 46 arc min East.
Steve