A Planetary Nebula in Scorpius
|Image exposure: |
|Image field of view: |
38.5 x 25 arcmin
|Image date: |
For the last few months I’ve been using my Schmidt-Cassegrain telescope, taking advantage of its narrow field of view to image the small objects which don’t suit my wider field refracting ‘scope.
Some of these have been planetary nebulae – and I’m hot on the trail for more of these beautiful end of life death throes of stars, before I go wide -field again in a few months time.
This is an annular (toroid) type planetary nebula, viewed pole-on, with an age of about 20-24,000 years, which is short by astronomical standards but longish for this transitional class of object.
The central star is a white dwarf with an unseen main sequence companion in a close 0.17 day orbit. Ref. The separation of about 1.26 solar radius is an indication that the two stars might be sharing a common envelope.
Here is a clickable cropped version:
The classic regular ring structure is interesting , bearing in mind the complication of a double star system at the centre. All the other stars in the image are either foreground or background to the nebula.
|Telescope:||Meade LX-90 200mm Schmidt-Cassegrain |
(deforked); 2000 mm f/l @ f/10.
|Optics:||Astronomik light pollution filter.|
|Mount & Guiding:||SkyWatcher EQ6-R Pro mount.|
|Imaging camera:||ZWO ASI 071 MC cooled.|
Images © Roger Powell
ABOVE US ONLY SKY : amateur astronomy in australia