Daily Archives: January 7, 2014

M7: Open Star Cluster in Scorpius

Image Credit & Copyright: Lorand Fenyes

M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars, can be seen with the naked eye in a dark sky in the tail of the constellation of the Scorpion (Scorpius). M7 contains about 100 stars in total, is about 200 million years old, spans 25 light-years across, and lies about 1000 light-years away. The above deep image, taken last June from Hungary through a small telescope, combines over 60 two-minute exposures. The M7 star cluster has been known since ancient times, being noted by Ptolemy in the year 130 AD. Also visible are a dark dust cloud and literally millions of unrelated stars towards the Galactic center.
NASA APOD 07-Jan-2014

NGC 2359: Thor’s Helmet nebula

e46aad3731b6bab0055ab5d57b5f318a.1824x0_q100_watermark_watermark_opacity-5_watermark_position-6_watermark_text-Copyright Alistair S
NGC 2359
 (also known as Thor’s Helmet) is an emission nebula in the constellation Canis Major. The nebula is approximately 15,000 light-years away and 30 light years in size. The central star is the Wolf-Rayet star HD 56925, an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. It is similar in nature to the Bubble Nebula, interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor’s Helmet.

Imaging telescopes or lenses: Home made 10inch Serrurier Truss
Imaging cameras: SBIG STF8000M STF8000M
Mounts: Skywatcher NEQ6 Pro NEQ 6 PRO
Software: Cyanogen Maxim DL, Startools
Filters: Baader Planetarium O3 8.5nm 36mm, Baader Planetarium Ha 7nm 36mm
Accessories: Starlight Xpress SX USB Filter Wheel 7x36mm, Teleskop-Service TS9-OAG off axis guider
Resolution: 3208×2357
Dates: Jan. 4, 2014
Locations: Melbourne
Baader Planetarium Ha 7nm 36mm: 6×600″ -25C bin 1×1
Baader Planetarium O3 8.5nm 36mm: 6×600″ -25C bin 1×1
Integration: 2.0 hours

2 hours of Ha and O3 mapped as LRGB -> O3.Ha.O3.O3
Stacked in Maxim, processed in Startools.

Autor: Alistair Symon

AstroPhotography of the day by SPONLI
7 January 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.