OBJECT

M31 - Andromeda Galaxy (+Ha on 15 Dec 13 - "mouse-over" image to see Ha!!!)     (image above is reduced-size | other sizes:  medium , original)

Distance:  2.5 million light years

Telescope Takahashi FS-60C @ f/6.2
Mount Takahashi EM200 Temma II
Camera QSI 540wsg @ -15C
Filters Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen 2
Guider SX Lodestar
Settings 9x15m Ha; 6x5m,10x4m L; 2x5m ea RGB (all bin1x1); AstroArt5, CS4 (cropped, 10xdarks/flats/fdarks/bias)
Date/Location

Notes
6,15 December 2013 - Las Cruces, NM

Published in YahooNews, 25 Jan 14 (screenshot).
Published in Space.com, 24 Jan 14 (screenshot).
     - 1st slot in Space.com "January 2014 Night Sky Photos"
     - Listed in Space.com "Amazing Pictures of M31"

Published
by Canadian Space Agency, 29 Jan 14 (screenshot).

Imaged over 2 nights. Most recent night (15 Dec: 2.25hrs Ha - Some details on "Ha" are in my blog, HERE), I had corrected the backfocal distance for flattener from earlier outing. Difference when Ha is added is only slight compared to origLRGB and not as apparent as M33Ha result from earlier in the year. For 6 Dec outing, here are my original comments: Just used Tak flattener as reducer adapter I had machined did not work out (backfocal distance was still a tad too long). Believe not optimal backfocal distance here, either (coma at corners was huge), so I still have some testing to do.

Copyright  Jeffrey O. Johnson

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