M13 - The
Great Globular Cluster
Photo: 27.07.2003, 8" F6 Newtonian, 69x15sThe
brightest globular cluster on northern sky. It
contains almost 1 million stars. The diameter of
the cluster is around 150ly, distance 22800ly.
|
A, Detailed Photos
B, Wide Angle Photos
A, Detailed Photos
Click the
picture to see full resolution photo (1.27"/pixel). |
M13
- The Great Globular Cluster 27.07.2003 (26.07.2003,
22:27 - 22:48 UT)
Resolution: 1.905 arcsec/pixel
Camera: Vesta 680 SC3.2
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F6
Exposure: 69x15s (gain 100%, Amp OFF), 16xDF, no
cooling
Captured and processed by K3CCDTools, then in
Corel PhotoPaint
Seeing: hazy, lim.magnitude for naked eye 3.5,
temperature 20°C
Processing:
1, summed in X2 mode in K3CCDTools
2, histogram + gamma 1.6, resampled to 100% and
67% size
3, adaptive unsharp mask in PhotoPaint (50%)
|
Click the
picture to see full resolution photo (1.27"/pixel). |
M13
- The Great Globular Cluster 27.07.2003 (26.07.2003,
22:48 - 23:01 UT)
Resolution: 1.905 arcsec/pixel
Camera: Vesta 680 SC3.2
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F6
Exposure: 69x15s + 71x8s (gain 100%, Amp OFF), 16xDF
Captured and processed by K3CCDTools, then in
Corel PhotoPaint.
Seeing: hazy, lim.magnitude for naked eye 3.5,
temperature 20°C
Processing:
1, separately 2 AVI sequences (15s, 8s exposures)
summed in X2 mode in K3CCDTools
2, histogram + gamma 1.6
3, results 15s + 8s stacked stacked together
4, resampled to 100% and 67% size
5, adaptive unsharp mask in PhotoPaint (50%) |
Click the
picture to see full resolution photo (0.96"/pixel). |
M13
- The Great Globular Cluster 24.08.2002 (21:48 -
22:08 UT)
Resolution: 1.92 arcsec/pixel
Camera: Vesta 675 SC2
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F6
Exposure: 39x10s (gain 100%, Amp ON), 15xDF
Captured and processed by K3CCDTools, then in
Maxim DL Demo and Corel PhotoPaint.
Seeing: hazy, almost full Moon, lim.magnitude for
naked eye 3.5, temperature 17°C
Processing:
1, stacked in X2 mode in K3CCDTools
2, gamma 2.0 in MDL, resampled to 100% size
3, adaptive unsharp mask in PhotoPaint (75%)
4, gamma 1.10, unsharp mask 1,1,100%
|
Click the
picture to see full resolution photo (0.96"/pixel). |
The same AVI source as above,
but Registax software used. Resolution: 1.92 arcsec/pixel
Camera: Vesta 675 SC2
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F6
Exposure: 36x10s (gain 100%, Amp ON), 15xDF
Captured by K3CCDTools,
stacked and preprocesed by Registax,
then in Maxim DL Demo and Corel PhotoPaint.
|
Click the
picture to see full resolution photo (0.96"/pixel).
|
M13
- The Great Globular Cluster 11.10.2001 (18:49 UT)
Resolution: 1.92 arcsec/pixel
Camera: Vesta 675SC at prime focus
Telescope: 8" Orion Europa Newtonian
Exposure: 12x7s (gain 95%), 20xDF
Seeing: lim.magnitude for naked eye 4.5This
is my second deepsky object.
|
B, Wide Angle Photos
Click the
picture to see full resolution photo (1014x736
pixels, 4.74"/pixel). |
M13 (The Great Globular
Cluster) 30.09.2002 (21:01
- 21:27 UT)
Resolution: 14.2 arcsec/pixel
Camera: Nikon
Coolpix 995, f=18.8mm
Telescope: 80mm F5 Refractor, 25mm eyepiece
afocal
Result focal length: 300.8mm (~37X Zoom)
Result focal ratio: F3.76
Exposure: 12x60s (ISO200, incadescent -3), Noise
Reduction
Camera control: The
Force software
Processed by K3CCDTools,
then in Corel PhotoPaint.
Seeing: nice clear skies (in light poluted city),
but windy,
lim.magnitude for naked eye 4.5, temperature 11°C
This is my first astro photo with Nikon digital
camera and afocal projection.The field of view is
almost 1.5°. Unfortunatelly M13 was only 21°
above horizon.
The image is without flat field correction.
Processing details:
1, aligned and summed in K3CCDTools
2, histogram stretch 0-60%, gamma 1.3 in K3CCDTools
3, resized to 50% in Corel PhotoPaint, 75%
adaptive unsharp mask |
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permission of author.
Last Update:
27.07.2003
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