|
|
Click the image for a wide field
0.85 arcsec/pixel display.
|
Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.643 arcsec / pixel. Shown
resampled to 2.57 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
internal filter wheel, AstroDon Filters |
|
Acquisition Data |
6/8/2008 and 6/9/2008
Chino Valley... with CCDAutoPilot3 |
|
Exposure |
Lum
120 min. (24 x 5 min. bin 1x1)
RGB 120 min. ( 8 x 5 min. bin 2x2) each |
|
Software |
CCDSoft,
CCDStack, Photoshop CS w/ the Fits Liberator plugin, Russell
Croman's GradientXTerminator and Noel
Carboni's actions.
CCDStack to register,
normalize, data reject, combine and sharpen.
PhotoShop for the
color combine. |
|
Comment |
North is to the
top.
Of the
150 or
so globular clusters that survive today, M3 is one of the largest
and brightest, easily visible in the Northern hemisphere with
binoculars. M3 contains about half a million stars, most of which
are old and red. The existence of young blue stars in M3 once posed
a mystery, but these blue stragglers are now thought to form via
stellar interactions.
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══════════════════════════════════
|
Instrument |
Celestron C11 @ F/6.1
(1705 mm) 1.087 arcsec / pixel |
|
Mount |
Losmandy G11 |
|
Camera |
SBIG ST-7 with
CFW-8A color wheel |
|
Acquisition Data |
5/12/06 to 5/14/06
Near downtown Seattle |
|
Exposure |
Lum
150 min (20 x 5 min)
Red 50 min (10 x 5, bin 2 x 2)
Green 50 min (10 x 5, bin 2 x 2)
Blue 67.5 min (9 x 7.5, bin 2 x 2)
|
|
Software |
CCDSoft, CCDOPS,
The DitherMat was used to dither the luminance layer,
Photoshop CS w/ the Fits Liberator plug-in, GradientXTerminator and
Paint Shop Pro. |
|
Comment |
Of the
150 or
so globular clusters that survive today, M3 is one of the largest
and brightest, easily visible in the Northern hemisphere with
binoculars. M3 contains about half a million stars, most of which
are old and red. The existence of young blue stars in M3 once posed
a mystery, but these blue stragglers are now thought to form via
stellar interactions.
North is to the
bottom. I think is looks better up side down. |
|
