Four MW globular clusters

[Dangerous-Dave]

Hi folks, I imaged these on Sunday (19/4/09) and Tuesday (21/4/09) nights with my OMC140 and 20D. M3/M13 were imaged on Sunday night, when the seeing was better, and M53/M92 on Tuesday. The latter were much more of a processing challenge on account of their smaller size and lower brightness.

M3, Canes Venatici

Orion Optics OMC140, Canon EOS20D, Astronomik CLS clip filter, 13x300s at ISO1600, darks/flats/offsets subtracted.

M13, Hercules

Orion Optics OMC140, Canon EOS20D, Astronomik CLS clip filter, 19x300s at ISO1600, darks/flats/offsets subtracted

M53, Coma Berenices

Orion Optics OMC140, Canon EOS20D, Astronomik CLS clip filter, 22x300s at ISO1600, darks/flats/offsets subtracted.

M92, Hercules

Orion Optics OMC140, Canon EOS20D, Astronomik CLS clip filter, 17x300s at ISO1600, darks/flats/offsets subtracted.

Here are the parameters for those of you interested in putting these things into context.

M          NGC/IC     Const         RA  (2000)    DEC           dist/Sun    dist/GC     Mag     Size
M3         NGC5272    Canes Ven    13:42:11.2    +28:22:32    33.9 kly    39.8 kly    6.19    18.0'
M13        NGC6205    Hercules     16:41:41.5    +36:27:37    25.1 kly    28.4 kly    5.78    20.0'
M53        NGC5024    Coma Ber     13:12:55.3    +18:10:09    58.0 kly    59.6 kly    7.61    13.0'
M92        NGC6341    Hercules     17:17:07.3    +43:08:11    26.7 kly    31.3 kly    6.44    14.0'

kly = thousands of light years

' = arc min

GC = galactic centre

[moocher]

Nice collection of globs you have there Dave, seems like the OMC is well suited to those....

Alan:)

[steve51450]

that's a great set of globs

[steppenwolf]

A very nice collection, Dave - I especially like the M13. I normally enjoy taking images of these globulars but I have to say that my latest attempt at M3 on Tuesday night was a complete flop and I have yet to figure out what went wrong!

Well done anyway, great to see them nicely presented.

[Doc]

Very nicely done and processed.

A big thumbs up.

[MaCross]

Well done Dave!

[Sam]

Great Globs, it's nice to see them all together like that.

[Psychobilly]

Globulicious....

Tonight - I have a cunning plan.... and I have booked tomorrow off work to hopefully make use of the last clear night of the weekend .....

Weather forecasts don't yah just..... :):)

[omneferuss]

I like! ..it's good to compare them like this, same scale, side by side, and see different characteristics between them.. and their vital statistics for reference too!

Top job !

[blinky]

They are really nice globs! Must get out and try to catch some myself.....

[trudie]

Great images Dave.

[Dangerous-Dave]

Thanks for the kind comments folks. Here is a montage of all four for quick comparison:

It's a shame more people overlook globs in favour of gas and galaxies so much. I remember being really inspired by shots of Omega Centauri, M13 and 47 Tucanae, reading Astronomy in the 1980s.

[saturn5]

Dont have a lot of interest in globs myself but these are superb Dave.