By Kit-fun Ho | 2021-05-15
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On 05/14/2021 09:00 pm by Steven Bellavia | Southold, NY
A 24 million km long plume of gas is ejected from Mercury's thin atmosphere due to the sun, very much like a comet.
This is only visible using a narrowband filter that captures the bright yellow sodium light at 589nm.
Borg 90FL f/4 astrograph, ZWO ASI 183MM Pro camera, Edmund Optics 589nm , 10nm bandpass filter
20 x 60 - second photos calibrated with dark, flat and dark-flat frames
