A Comet in Octans
|Exposure: 12 Minutes||Field of View: 19.4 x 19.4 arcmin||Image date: 2021-06-12|
It’s not often I would image anything in Octans – the constellation which is famous for including the South Celestial Pole but very little else. However, a comet was passing through the constellation about 8° from the Pole and I decided to have a hunt for it, in between a couple of other images I took last night.
It’s a faint and fuzzy ball of ice & rock, three astronomical units (457.1 million km) away. At magnitude 14.8, it is about 1,600 times less bright than the faintest stars you can see with the naked eye.
It’s at dead centre in the inverted image above. Now I’m off to look for something a bit brighter…..
Thanks for reading 🙃
Telescope & Imaging Details
|Telescope:||SkyWatcher Esprit 120 mm apochromatic 3-element refractor; 840 mm f/l @ f/7.|
|Optics:||Field flattener; ZWO Duo-band Hα (656nm) and [OIII] (500nm) filter.|
|Mount & Guiding:||SkyWatcher EQ6-R Pro mount; ZWO ASI120 guide camera.|
|Imaging camera:||ZWO ASI 071 MC Pro (CMOS 28.4mm 16 Mpx).|
|Software:||Control: Cartes du Ciel, ASCOM, EQMOD, PHD2. Imaging: SharpCap, Gimp.|
Images © Roger Powell
I’m one of the founder members of Macarthur Astronomical Society and current webmaster.