K3's Astronomy - Deep Sky
"When I consider your heavens, the work of your fingers, the moon and the stars which You have set in place, what is Man that You are mindful of him?" -- Psalm 8:3,4

M45 - The Pleiades

Click the picture to see full resolution photo (968x681 pixels, 4.05"/pixel).
M45 - The Pleiades 11.01.2003 (21:14 - 22:13 UT)
Resolution: 8.1 arcsec/pixel
Camera: Nikon Coolpix 995, f=22.4mm
Telescope: 80mm F5 Refractor, 25mm eyepiece afocal
Result focal length: 358.4mm (~44X Zoom)
Result focal ratio: F4.48
Exposure: 42x20s (ISO400, sunny white balance), Noise Reduction
Camera control: The Force software
Processed by K3CCDTools, then in Corel PhotoPaint.
Seeing: windy, soft fog, Moon in first quarter, temperature -8C


Inspite of Moon in first quarter I decided to capture M45. The shine of Moon wiped faint details, but I am quite satisfied with results.
The image was processed without flat field correction.
Processing details:
1, Aligned and summed in K3CCDTools
2, Exported to FIT
3, R, G and B FIT files (planes) were stacked in Maxim DL Demo
4, Flatten background applied in Maxim DL Demo to suppress uneven field illumination
5, Resized to 50%, then gamma 2.0 applied
6, Histogram stretching - in 5 steps
7, Each step was saved into separate file
8, The files were summed in K3CCDTools again

See More detailed study about postprocessing M45 and analysis of captured image
M45 - The Pleiades 11.11.2001 (0:51 UT)
Resolution: 46.2 arcsec/pixel
Camera: Vesta 675SC at photo tripod
Objective: 2/50 Flexon
Exposure: 25x3s (gain 100%), 25xDF
Seeing: lim.magnitude for naked eye 4.5

The Pleiades is well known open star cluster visible even by naked eye.

Click the image to see the full size pictures (23.1"/pixel).

M45 - The Pleiades 11.11.2001 (01:47 UT)
Resolution: 46.2 arcsec/pixel
Camera: Vesta 675SC at photo tripod
Objective: 2/50 Flexon
Exposure: 30x5s (gain 100%), 25xDF
Seeing: lim.magnitude for naked eye 4.5

The same night, but longer exposure.

Click the image to see the full size pictures (23.1"/pixel).

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Last Update: 12.01.2003