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Ernie Mastroianni | all galleries >> Astrophotography >> Comets > Comet ISON
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08-OCT-2013

Comet ISON

The comet in the constellation Leo on Oct. 8. Earlier predictions thought it might be magnitude 10.5 by this date, but it is closer to magnitude 13.5 in this photo. The star closest to the comet is magnitude 12.7. Taken from my back yard in suburban Milwaukee with a Celestron 9.25, guided with a Questar 3.5 and taken with a Nikon D700 at prime focus and ISO 1250. This is a stack of four frames of 75 seconds each. The field of view is about 1/3 of a degree.

Nikon D700
75s iso 1250 f/10, focal length 2350mm. hide exif
Full EXIF Info
Date/Time08-Oct-2013 05:06:04
MakeNikon
ModelNIKON D700
Flash UsedNo
Focal Length85 mm
Exposure Time75.30 sec
Aperturef/2
ISO Equivalent1250
Exposure Bias
White Balance
Metering Mode
JPEG Quality
Exposure Program
Focus Distance

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