Heart of the Heart in SOHb (David McClain)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1805

Heart of the Heart in SOHb, David McClain

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Heart of the Heart in SOHb

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Heart of the Heart in SOHb

Raw SHO frames courtesy of Deep Sky West Remote Observatory in New Mexico, USA. (deepskywest.com) Data obtained with FSQ 106EDXiii / QSI683wsg / Lodestar / Paramount MyT.

24.5 hrs total integration (17x1800s H, 16x1800s O, 16x1800s S). The palette shows the weaker lines in the emission spectrum, eliding H-alpha entirely, but incorporating SII, OIII, and H-beta.

Processing in PixInsight.

Palette:

R = S

G = O + (7/20) * (23/25) * H

B = (11/20) * O + (7/20) * H

The factor (7/20 * H) comes from the ratio of Ha/Hb = 2.87. The factor 23/25 on it in O comes from the synthesis of the 486 nm H-beta line. That color is 23 parts G for every 25 parts B. And the term (11/20 * O) in B comes from the color of the OIII primary line at 500.7 nm blended with the secondary line at 495.9 nm, where the color has 11 parts B for every 20 parts G.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	1168236
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Heart of the Heart in SOHb

Heart of the Heart in SOHb

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Heart of the Heart in SOHb

Heart of the Heart in SOHb

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