Department of Physics and Astronomy

Hicks Building Starlight Xpress Oculus All-Sky Camera

Auto-exposure techniques are used to take images every five minutes.

Exposure times start at 5, 10, 15, etc, minutes past the hour and range from 0.001 to 120 seconds based on the brightness of the sky around zenith.

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Click on the image to get a full resolution sized version.

sxoc.png Image information:

If the sky is clear, exposure times will tend towards the 120 seconds maximum. Very cloudy skies will have short exposure times.
If the image is all white and the exposure time is sub-second, then the sky is too bright. Subsequent exposures should show more detail.
The Hicks Observatory dome can be seen upside down at the top of the image and the main part of the Hicks Building is seen to the upper right.
North is up, East is to the left. Zenith is in the centre of the image and the North Celestial Pole (NCP) is just below the Hicks Observatory dome.

Start of exposure timestamp: 2017-10-21 20:55:02 UTC
Exposure time: 88.4 seconds
Resolution: 1040x1392
Binning: 1x1

Image count statistics (range: 0 - 65535):
minimum: 2471
maximum: 61014
average: 41425
standard deviation: 13164
outer region maximum: 3627

100x100 pixel zenith region count statistics (range: 0 - 65535):
zenith region minimum: 23178
zenith region maximum: 39891
zenith region average: 28815
zenith region standard deviation: 2684

sun altitude (degrees): -35.1171
day/twilight/night status: night

Example Images

sxoc_clear.png clear sky, 120 second exposure
sxoc_clear_with_moon.png clear sky with the moon, 60 second exposure
sxoc_partially_cloudy.png partially cloudy sky with the moon rising, 40 second exposure
sxoc_cloudy.png cloudy sky, 50 second exposure
sxoc_rain.png overcast sky with rain, 15 second exposure
sxoc_high_humidity.png clear sky but with very high humidity, 77 second exposure