Image is here: https://www.astrobin...338128/?nc=user
This is the best seeing I have had at my dark sky for quite a while
but it was still pretty ordinary (about 2.7"). The Eight Burst Nebula is
an interesting and pretty object, but is rather small---about 1.5'.
Well worth going for if the seeing justifies it.
Telescope: 12.5" Plane Wave CDK
Camera: FLI Proline 16803 with a 49' x 49' FOV
Exposure: 80 min each of Ha, SII and OIII
The colour mapping is chosen to mimic RGB:
Ha+25% Sii -->Red
OIII +25% Ha -->Blue
FOV: 6' x 6', so there was some pretty severe cropping here.
Blurb: NGC 3132 is also known as the Southern Ring Nebula or, more
commonly, as the Eight-Burst Nebula because of its figure-8 appearance
through small telescopes. It is a very bright, asymmetric planetary
nebula of approximately 0.4 light years across and is about 2,000
light-years away in the southern constellation Vela. It is receding from
us at 49 kilometers per second.
This expanding cloud of gas is one of the nearest known planetary
nebulae. The gases expand away from the central star at a speed of about
14.4 kilometers per second. Interestingly, neither the unusual shape of
the surrounding cooler shell nor the structure and placements of the
cool filamentary dust lanes running across NGC 3132 are well understood.