Sky at Night Magazine - - THE SKY GUIDE -

Once you’ve re­cov­ered from try­ing to lo­cate the elu­sive Collinder 89, re­turn to the line be­tween Pro­pus and Te­jat Pos­te­rior. The first half of the line, start­ing at Pro­pus, marks the lo­ca­tion of su­per­nova rem­nant IC 443, the Jel­ly­fish Ne­bula, a firm as­tropho­tog­ra­phy favourite. Vis­ually this ob­ject is a chal­lenge and the use of an OIII fil­ter is highly rec­om­mended. A south­ern ‘cres­cent’ can just about be seen vis­ually with a 10-inch scope. IC 443 is be­lieved to be the re­sult of a su­per­nova that oc­curred some­time be­tween 3,000 and 30,000 years ago. The ex­plo­sion shock­wave is in­ter­act­ing with a molec­u­lar cloud present in the re­gion. SEEN IT

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