LVAS October '17 Challenge, M15

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Apollo XX
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LVAS October '17 Challenge, M15

Unread post by Apollo XX » Sun Nov 19, 2017 11:34 am

For the LVAS October Observer’s Challenge I was able to observe Messier 15, also known as the NGC 7078, several times. I was also able to use several different telescopes, including 80mm Binos and 4.5”, 8”, and 12.5” reflectors.

Because of its relatively nearby position to M15, I also observed M2 every time I viewed M15. I found Messier 15 to be a spectacular object in the 12.5” scope, but less so as the aperture went down, whereas Messier 2 seemed to hold up better in the smaller aperture instruments. In the large scope, M15 exhibited aan extremely bright core, with many dense regions of stars splaying away from the core in all directions. M2, by comparison, exhibited a more evenly illuminated core – not as bright as M15 – and didn’t have the ragged regions of stars in the halo. M15’s vividness in the eyepiece dropped off significantly in the smaller instruments, while M2’s more even illumination caused the cluster to hold its shape even down to 4” of aperture. Both objects were easily visible in 20 x 80mm binoculars.

I found these to be interesting objects to view together, especially consider their ages – 12 and 13 billion years old respectively – and the fact that they are nearly equal in size, distance, and magnitude. M15’s more loosey-goosey structure hurts it in small scopes, but it’s a large instrument showpiece.

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Mike M.
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AndyG
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Re: LVAS October '17 Challenge, M15

Unread post by AndyG » Sun Nov 19, 2017 12:40 pm

Great report Mike, I always enjoy reading your LVAS challenge reports.

Bob M had M15 up in his big dob at the Rehoboth school event and it was a pretty sight.
Andy
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Apollo XX
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Re: LVAS October '17 Challenge, M15

Unread post by Apollo XX » Mon Nov 20, 2017 6:06 pm

Thanks Andy! Glad you enjoy the reports.
Mike M.
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