Monday, March 24, 2025
Melotte 15 in heart nebula, IC 1805
I shot material for this new photo back in February, 10 hours of exposures total for three narrowband color channels. (H-alpha, O-III and S-II)
MELOTTE 15
Click for a large image, 2000 x 2000 pixels
A mapped color image from a light emitted by an ionized elements,
sulfur=red, hydrogen=green and oxygen=blue
A Closeup
Click for a large image, 2000 x 2000 pixels
Click for a large image, 2000 x 2000 pixels
Melotte 15 in the Heart Nebula
Click for a large image, 2000 x 2500 pixels
Technical details
Processing workflow
Image acquisition, MaximDL v6.5
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS
Levels and curves in PS
Imaging optics,
Celestron EDGE 14" with 0.7 Focal reducer
Mount,
MesuMount Mark II
Cameras,
Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters,
Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 10h
H-alpha, 18 x 1200 s, binned 1x1 = 6 h
O-III, 6x 1200 s, binned 2x2 = 2h
O-III, 6x 1200 s, binned 2x2 = 2h
S-II, 6 x 1200 s. binned 2x2 = 2h
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