David's Astronomy Pages CCD Images - Session 903 (2021-08-04)

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Session Notes

M57 - Planetary Nebula (Ring Nebula)     Variable Stars (photometric monitoring) - CI Cyg     Nearby Stars (astrometric monitoring) - None

- Late Evening Session (1.0 hours) - Summer sky conditions - Main aims of the session were to acquire a selection of targets as conditions allowed and make attempt to image the outer envelope of M57 planetary nebula - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 9.0°C (min) - CCD Temperature:  -10°/-15°C - Notes from 2021-08-04 >>    [ Local Files >> ]   -

M57 - Planetary Nebula (Ring Nebula)

M57 (Lyra) Dual Band Target hoping to capture faint outer envelope (inspired by

CCD Image  (50% size, log scale) 10 x 120s exposure (average combine), 3x3 binning, DB Filter 2021-08-04 23:13 UT (#903004-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M57 Inner Envelope - Detail

CCD Image  (150% size, log scale, cropped) Image details as above

M57 Outer Envelope - Detail Very faint outer envelope is highlighted by blue colour in this false colour image Image taken with Optolong L-eNhance Dual Narrowband Deep Sky Imaging Filter (filter designed to effectively isolate the H-Alpha, H-Beta, and Oxygen III nebula emission to counter the impact from light polluted skies)

False Colour CCD Image  (100% size, log scale, cropped) Inverse Spectrum Image details as above

CCD Image  (100% size, log scale, cropped) Image details as above

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