of the Sky - South Polar
near Winton, Qld, Australia
Instrument: Canon 17 - 40mm L @ 17mm at f/4.5
Platform: Robotic Barn Door
Camera: Canon 10D @ ISO800
Location: Near Winton, Queensland, Australia (-22 S Latitude)
Elevation: 700 ft.
Sky: Seeing 9/10, Transparency 10/10
Outside Temperature: 45F
Processing Tools: Photoshop CS, Maxim DL, PixInsight, Pixmantec RAW
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In the Southern Hemisphere, the
entire sky appears to rotate each day around a point equal to
your southerly latitude above the southern horizon. At -22 S
latitude, this point is fairly low in the sky. The left panel
is with the trackers drive turned on for the ten minutes of exposure.
Can you find Sigma Octans - the South Star? It is not so obvious
as the northerly counterpart, Polaris.
The right panel tells the
whole story. With the drive turned off, the sky's rotation shows
stars as arcs around the south pole, with Sigma Octans near the
center of the rotation. Look at the larger images to see the
very center of the rotation. Sigma is off the pole about a degree.
Still Cant find the Pole
or Sigma? Click HERE for a labeled chart I made!