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What's that?

TheMan

By TheMan
in Imaging - Deep Sky

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Sunshine

Sunshine

Posted
Posted
50 minutes ago, TheMan said:

slapped that into a planetarium and it said this.

notice the galaxy in question NGC3621 in the lower right box with relation to M83, it matches your image right on. The problem is scale though, relative to their positions in Stellarium, 3621 should not be visible in the image you took.

Screen Shot 2019-01-12 at 10.20.11 PM.png

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Demonperformer

Demonperformer

Posted
Posted

NGC 5253?

I'm hopeless at navigating dense star fields, particularly ones I don't know, but if you draw a line from HD118646 to HD118600, it is on the opposite side of that line to M83, at a distance of about 113' from M83.

On my screen the distance between these two stars is ~25mm and the distance from M83 to the galaxy is ~175mm, which is 7x the distance. The actual distance between the two stars is about 17' so the galaxy is about 7x17' from M83, which works out at 119'. Given the by-gosh-and-by-golly guestimates I have used, that would put it within striking distance.

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Demonperformer

Demonperformer

Posted
Posted

Just taken a few more careful measurements:

Star distance on image 26mm = 17' 07.7" = 17.12'; centre of M83/Galaxy distance = 169mm = 6.5x star distance = 111.3'

Distance M 83/NGC 5253 = 113.3', which puts my figures within 2% of the actual distance, so I will stick my neck out and hereby remove the '?' from my previous post!

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