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Originally Posted by Lester
Well done Mistro, 
>snip
When I have viewed the double of Antares I would call it green how come here and others call it blue? 
Good one John. |
Hi Lester
Visually, Antares companion looks green because Antares is so bright and being red in colour, the eye is somehow fooled into seeing the much fainter companion appear as the complementary colour green. (Red/Green)
Photographically, the CCD is not fooled so the "true" colour, blue is revealed.
Cheers
Dennis