Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  11 Sgr  ·  11.15  ·  12.96  ·  13 Sgr)  ·  13 mu. Sgr  ·  14.04  ·  17 Sgr  ·  21 Sgr  ·  24 Sgr  ·  28 Sgr  ·  30 Sgr  ·  4 Sgr  ·  55 Ser  ·  58 Oph  ·  Al Thalimain  ·  Alnam (μ Sgr  ·  B102  ·  B272  ·  B274  ·  B276  ·  B277  ·  B279  ·  B280  ·  B281  ·  B282  ·  B284  ·  B297  ·  B301  ·  B307  ·  B310  ·  And 1451 more.
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Nebula Alley Mosaic, John Noble
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Nebula Alley Mosaic

Getting plate-solving status, please wait...
Nebula Alley Mosaic, John Noble
Powered byPixInsight

Nebula Alley Mosaic

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Description

I've been in a bit of an astro slump for the past two months, too busy at work and at home to enjoy it. Added to that the smoke haze has been bad and it doesn't get dark until well past my bed time. I've been really remis in following Astrobin of late and boy those emails pile up if you don't check daily!

Anyway I finally sat down and processed some data I gather in the Outer Banks (Bortle 2/3 site) in late May and early June. I decided to go on a mosaic spree with my Askar 200 mm f4 and a Rokinon 135 mm f2 (that my wife kindly bought for my birthday), I used the ASI6200 MM with the 400 mm and the ASI2600 MC with the 135 mm. Both mounted on my AM5 travel mount. The Askar is a fantastic piece of equipment. The 135 mm - well perhaps I got a bit of a dud - I was totally underwhelmed by the optical performance at f2 and when stopped down to f2.8 very bad coma etc even on the APSC chip. Next time I'll try it at f4, perhaps I'm being to harsh on it! Anyway I only use the 135 mm data for color so all the stars and details come from the Askar.

This is a 4 panel mosaic of my favorite area of sky 30 minutes on each panel 5 min sub exposures. I stitched then together using spectrophotometric mosaic which is just amazing!  I used blur exterminator on the luminance but not the color (I did try it but the results were worse than the uncorrected version).

Thanks for looking.

John

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Nebula Alley Mosaic, John Noble

In these public groups

ZWO ASIAIR PRO USERS
Multiscope Setup