NGC4395 - Spiral Galaxy in Canes Venatici

ngc4395 in Canes Venatici

Here is the LRGB image:



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From Wikipedia:

NGC 4395 is a nearby low surface brightness spiral galaxy located about 14 million light-years (or 4.3 Mpc) from Earth in the constellation Canes Venatici. The nucleus of NGC 4395 is active and the galaxy is classified as a Seyfert Type I known for its very low-mass supermassive black hole. It is one of the lowest

Physical characteristics: NGC 4395 has a halo that is about 8′ in diameter. It has several patches of greater brightness running northwest to southeast. The one furthest southeast is the brightest. Three of the patches have their own NGC numbers: 4401, 4400, and 4399 running east to west.

The galaxy is highly unusual for Seyfert galaxies, because it does not have a bulge and is considered to be a dwarf galaxy.

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Scope: Planewave 12.5" CDK
Camera: Apogee U16M w Astrodon GenII LRGB
Mount: Paramount ME (MKS 5000 upgrade)
Luminance 18x10 min
H-Alpha 13x20min
12/15/12 x 10 min each RGB
Images acquired w TheSkyX Professional and CCD-Commander

PixInsight processing:
RGB: Gradient Removal, SPCC, BlurX, Curves, HistogramTransformation, masked Saturation boost, Local Histogram Transformation, ACDNR
Lum: Gradient Removal, BlurX, Curves, HistogramTransformation, masked Saturation boost, Local Histogram Transformation, ACDNR
H-Alpha: StarX, Curves, Histogram Transformation

Photoshop processing:
Luminance enhanced with a duplicated HPass filter layer (layer mask to just enhance the galaxy) then this was added to RGB as a luminance layer.
Starless H-Alpha was then added to this result using Lighten blend mode and added ONLY to the red channel

Click on the image to see a larger version.

Lucknow, Ontario, Canada
May 2024