Galaxies I can image in 1hr?

[rocketandroll]

Hi all

Looks like I'm gonna get a bit of imaging time tonight as our astro club are running a public stargazing evening in a local park.

My plan is to use the 80ED for imaging this time and I recon I can get together an hour or so of subs on something.

That seemed enough to capture M51 ok... but I am wondering what other galaxies or galaxy clusters are viable with an hour of subs at ISO 1600?

Is the Leo Triplet bright enough to get something on that sort of length of exposure?

Any other suggestions?

Cheers

Ben

[Demonperformer]

Basically the important figure is the surface brightness. For M51 that is 12.9, so any galaxy that has the same sb or brighter should be ok.

So M65/66 should be ok, but M95/96 are both fainter.

HTH

[rocketandroll]

Cheers!

I have a list of magnitudes for the Messiers but not surface brightness... Is there anywhere online where such data is listed?

Ben

[Demonperformer]

NGC/IC Project Public Database

[rfdesigner]

I made up a list based on the total brigthness and apparent size for planning what to capture next. Data from Wikipedia so might be a little off here and there.

Mostly Galaxies plus a couple of other favorites.

Listed in order of surface brightness.

Messier object,Surface Brightness in Mag/sq arc sec

M1,20.8

M13,20.9

M32,21.1

M82,21.2

M83,21.3

M104,21.3

M66,21.5

M102/NGC5886,21.7

M51,21.7

M81,22.0

M31,22.2

M65,22.2

NGC 5128,22.2

M77,22.3

M64,22.3

M105,22.4

M95,22.4

M59,22.5

M108,22.5

M99,22.5

M88,22.5

M60,22.5

M87,22.6

M85,22.6

M84,22.6

M94,22.6

M86,22.7

M58,22.7

M58,22.7

M61,22.8

M89,22.8

M63,22.8

M49,22.8

M100,22.9

M90,22.9

M33,23.0

M91,23.0

M106,23.0

M109,23.1

M98,23.2

M110,23.5

NGC4889,23.6

M74,23.6

M101,23.7

Hope this helps

Derek

[rocketandroll]

No wonder I didn't find 101, right there at the bottom of the list :-)

Might have a stab at 81/82 then.

Cheers!! That's a BIG help!!

Ben

I made up a list based on the total brigthness and apparent size for planning what to capture next. Data from Wikipedia so might be a little off here and there.

Mostly Galaxies plus a couple of other favorites.

Listed in order of surface brightness.

M101,23.7

Hope this helps

Derek

[NickK]

M81 & 82 can be seen through a 13mm EP with lots of light pollution so you should be fine. The high angle also means you get less atmosphere!