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Hi guys,
Les, thanks for the SINBAD work. Yes, I have no doubt it is Gum 46.
Andrew, I've had a closer look at Albert's (avandonk) brilliant image and I estimate it to be around 2 arc min in size (about what you expected). The overly enlarged image (my apologies Albert) shows the distinctive Gum 46 shape. The larger field shows it position. The top bright star is Beta Crucis, with the open cluster Tr20 centre right. Gum 46 is in the bottom right corner. The brightish star between the neb and cluster is 5th mag iota Crucis. To give you an idea of the scale Beta and Iota are 1° 20' apart.
Bojan, does this image help you sort out your 'red' star?
Gum 46 seems to have a reasonable surface brightness - has anyone observed it?
Regards
Glenn
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