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Pluto, four days apart, 



Pluto, four days apart

Technical card

Imaging telescope or lens:Planewave Instruments 24" CDK

Imaging camera:SBIG STX KAF-16803

Software:MaximDL 5

Filter:Baader Luminance

Resolution: 3213x1621

Dates:Oct. 26, 2016

Frames: 3x60"

Integration: 0.1 hours

Avg. Moon age: 25.70 days

Avg. Moon phase: 15.73%

Locations: driveway, Daytona Beach, FL, United States


Two images, taken four days apart, showing the apparent motion of Pluto through the star-field. I hadn't done this in years, and the first time I tried I felt a little bit like Clyde. The fact that we have now sent a spacecraft past that little dot is even more mind-stretching. Because of the low elevation angle, I had to make several attempts to finally have two nights of decent seeing so that the stars didn't look terrible. Here the stellar FWHM is ~2 arcsec, helped by the relatively short exposure times, as well as selecting the best three images from a number of exposures on each night. Pluto is about 14th mag and appears to approach a ~9th mag star in the 10/30/16 frame. The FOV is ~12.5 arcminutes across, showing Pluto's apparent motion as ~1 arcmin/day. North is up, East to the left, processing in Maxim, slight gamma stretch to bring up the background stars a little.



License: None (All rights reserved)


Pluto, four days apart,