Saturn au naturel (Rod Kennedy)

Contains: Solar system body or event

Saturn au naturel

Acquisition type: Lucky imaging

Saturn au naturel

Acquisition type: Lucky imaging

A softer Saturn with gentle processing. No barlow/powermate just 2.4µm pixels. No color re-balance, just straight RGB combine in Photoshop (very surprising). No de-rotation just living with rotational blurring (the "Saturn un natural" version may come later).

There were 15 repeats of taking 60 sec R data (@ average 48 fps), 60 sec G data (@ average 48 fps) and 60 sec B data (@ average 38 fps).

The motorised focuser made color filter dependent adjustments over a range of 0.57mm (570µm) as the filters are not parfocal at this F ratio. At F/10 the (worse-case) Critical Focus Zone (CFZ) is 200µm. (Previously using a 2.5x barlow the CFZ is over 1000µm and the filters would be parfocal.)

Because Saturn is relatively dim then not using a barlow/powermate seems to have given an advantage because more frames can be taken. Although the performance advantage is not that great. In contrast, with Jupiter it seems that using a barlow/powermate is better even though it is yields a crazy oversampling factor.

Thanks for looking!

Scope=LX200GPS

Camera=ZWO ASI183MM Pro

Diameter=18.19"

Magnitude=0.17

CMI=102.1° CMIII=107.3° (during mid of capture)

FocalLength=2750mm (F/10)

Resolution=0.18"

Original
Final
B

B

Description: My processing has improved from I don't know what the heck I am doing (2019) to I have a vague idea what I'm doing (2022). Now I need some non-existent spare time to Master WinJUPOS...

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Astrometry.net job	n/a
PixInsight job	n/a
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Saturn au naturel

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