MarkS Posted May 22, 2016 Report Share Posted May 22, 2016 NGC 4038 and 4039 are two interacting galaxies in Corvus, about 50 million light years away. They are currently in a starburst phase, and it is estimated that they started to interact about 900 milliom years ago and that the antennae formation started around 300 million years ago. The cores of the pair are about 4 arcminutes in diameter, and the antennae span about 20 arcminutes. The galaxies are listed as magnitude 11, but the antennae are very tenuous. This image was shot with the ASA10N in f/6.8 configuration with all subs binned x2, giving a plate scale of 1.3"/px and an effective focal ratio of about f/3.4. Total exposure 5 hours 20min LRGB. Camera Moravian G2-8300; DDM85A mount. SQL reading only fair at 21.2, and seeing also only fair, at ~3". Processed in Pixinsight and Photoshop. Mark Link to comment Share on other sites More sharing options...
astrosirius Posted May 23, 2016 Report Share Posted May 23, 2016 Wooo Mark, it's really amazing, I like very much the balance colour that have you could extract taking into consideration the total amount exposure is not too much for this tiny and weak Galaxy. Best regards, Luis Link to comment Share on other sites More sharing options...
GeorgeCarey Posted May 23, 2016 Report Share Posted May 23, 2016 Great image. I can only dream of SQM 21.2. My best ever was 20.11 What is your best SQM? Link to comment Share on other sites More sharing options...
MarkS Posted May 23, 2016 Author Report Share Posted May 23, 2016 Thanks Luis and George. George, best at my usual site is 21.59. Best I have measured - unfortunately not visited much because it is 700km away - was 21.78(!) Mark Link to comment Share on other sites More sharing options...
afesan Posted May 24, 2016 Report Share Posted May 24, 2016 Great image Mark !!!! . Lovely one ! Link to comment Share on other sites More sharing options...
john32712 Posted May 25, 2016 Report Share Posted May 25, 2016 Spectacular Mark! Link to comment Share on other sites More sharing options...
MarkS Posted May 26, 2016 Author Report Share Posted May 26, 2016 Antonio and John, Thanks for looking and your comments. Link to comment Share on other sites More sharing options...
rbrecher Posted June 16, 2016 Report Share Posted June 16, 2016 That is a great shot! Link to comment Share on other sites More sharing options...
rbrecher Posted June 16, 2016 Report Share Posted June 16, 2016 Thanks for reporting on your conditions. My seeing is also about 3" most of the time. My SQM readings are usually around 20.5-20.9. Link to comment Share on other sites More sharing options...
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