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Old 19-02-2019, 04:06 PM
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Andy01 (Andy)
My God it's full of stars

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M67 - The King Cobra Cluster

Was at the end of an imaging run, it was still clear with an hour or so of darkness left so heck, why not point the scope at some random DSO and see what I get?

Turns out that this is M67 - an open cluster located in Cancer – it is much smaller than it’s larger neighbour M44 -The Beehive Cluster, and while not the oldest open cluster (with an age estimated to be 4 billion years), it is close at about 800-900 ly distance.

M67 has more than 100 stars similar to the Sun, and numerous red giants.
It appears roughly the same size as the full Moon.

M67 has a lovely mix of blue & yellow stars, dunno if I can spot the cobra though?

It's absolutely short on integration time, but sometimes it's nice to take a snap just for the fun of it!
10x120 sec RG&B from my light polluted suburban backyard, processed in APP & PS.
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Last edited by Andy01; 19-02-2019 at 06:02 PM. Reason: added details
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Old 19-02-2019, 04:39 PM
Placidus (Mike and Trish)
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Well worth the effort. A ripper of a cluster. The star colours are lovely.

Minor: the background seems a bit mottled. That could be due to severe light pollution and ageing flats. Given that there's no nebulosity, you could probably just pull a slider in photoshop and make the background go away.

Four billion years seems utterly antique for an open cluster. Getting up towards globular cluster territory. Open clusters normally fall apart after just a few million years.

Best,
MnT
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Old 19-02-2019, 06:04 PM
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Andy01 (Andy)
My God it's full of stars

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Quote:
Originally Posted by Placidus View Post

Minor: the background seems a bit mottled. Given that there's no nebulosity, you could probably just pull a slider in photoshop and make the background go away.
Done, thanks! Given the lack of integration time - it's likely to be a result of the LP, and a known (required) firmware upgrade to the camera that I hav'nt installed yet
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Old 19-02-2019, 08:22 PM
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Nice point and click picture Andy
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Old 20-02-2019, 07:31 AM
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Quote:
Originally Posted by Placidus View Post

Four billion years seems utterly antique for an open cluster. Getting up towards globular cluster territory. Open clusters normally fall apart after just a few million years.

Best,
MnT

Yes, it's a weird cluster. At one time there was speculation that it could be an evaporated globular cluster, but that seems not to be the case.
Some info here https://en.wikipedia.org/wiki/Messier_67
and a nice wide field shot here, which looks very globular clusterish
https://apod.nasa.gov/apod/ap070809.html
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Old 20-02-2019, 12:05 PM
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Beautiful mix of star colours there - lovely shot.
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Old 20-02-2019, 12:36 PM
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4-5 exquisitely small PGC galaxies just visible in there too, so Skysafari tells me.
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