After the 7 stars of the Big Dipper and the 3 stars of Orion’s Belt, these 5 stars are likely the most well-known in the northern sky.
These are the 5 bright stars of Cassiopeia the queen, better known simply as “the W” in the sky. Her five stars come in a range of colours, from blue giant Segin at upper left to yellow giant Shedar at lower right.
Scattered around Cassiopeia you can also spot at least one bright red nebula, the “Pacman Nebula,” plus a faint patch of purple nebulosity just above central Navi, the middle star of the W also known as Gamma Cassiopeiae. A few wisps of fainter reddish nebulosity and lanes of dark dust wind around the queen’s celestial throne. The left side of the W – the back of the throne – is also home to several clumps of stars, nice open clusters suitable for binoculars or any telescope.
I shot this portrait of the Queen on Wednesday night, February 6, on a cool and frosty winter night in my backyard. For the set of 8 images that went into this stack I used a new tracking device, the iOptron SkyTracker. It’s a nifty little battery-powered tracker, compact but very solid. And it tracks very well. For this portrait I used a 135mm telephoto lens, and most, though not all, shots were very well tracked with pinpoint stars. A few frames showed a bit of trailing, not unusual for small portable tracking mounts. At $400 the little iOptron SkyTracker is a great accessory for anyone wanting to shoot constellations and the Milky Way with wide-angle to telephoto lenses.
– Alan, February 7, 2013 / © 2013 Alan Dyer