## NOCTUARY – February 2013 Edition

Gallery: Comet Lemmon . . . . . . . . . . . . . … . . . 02
A selection of photographs of the lovely Comet Lemmon that
graced the deep southern skies during January and February.

From the Archimedes Archives . . . . . . . . . . . . 03
Interesting bits and pieces to pique the astronomically curious.

Deep-sky Highlight: The Blue Planetary . . . . 06
A deep-sky gem hiding in Centaurus.

Dark Emu Rising . . . . . . . . . . . . . . . . . . . . . . .. . . 07
The spectacular dark nebula complex known to some as the Dark
Emu rises, in pursuit of the Large and Small Magellanic Clouds.

Astrophotography tutorial (Part 2) . . . . . . .  . . 09
The second installment of Brett du Preez’s astrophotography
tutorial takes a personal detour.

Jargon Jambalaya . . . . . . . . . . . . . . . . . . . . . . . . 13
Some astrojargon explained.

The Tale of Hydra . . . . . . . . . . . . . . . . . . . . . . . . . 16
A convoluted story surrounds the largest, and one of the most
ancient, constellations.

A South African Champion . . . . . . . . . . . .  . . . . 24
The nearest star to the solar system has been seen by few people.
Use this finder chart to catapult yourself amongst the elite.

Noise vs. ISO in Astrophotography . . . . . . . . . 25
What’s the best ISO setting to use on your DSLR when taking
astrophotos? Here’s one way of finding out.

Briefly Noted . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
Some housekeeping announcements and other stuff that didn’t
fit in elsewhere: Lacaille’s Sky – On the Cover – Noctuary