ISS Over Mont-Megantic Observatory (APOD 18 Aug 2007)

iamlucky13 · Post by **iamlucky13** » Mon Aug 20, 2007 6:32 am

http://antwrp.gsfc.nasa.gov/apod/ap070818.html

The color in this photo is great (although probably enhanced). Also, it looks like the telescope was moving as the picture was taken. Notice some of the ribs appear translucent.

Did anybody else notice the star trails from the earth's rotation don't appear even remotely concentric? They seem to follow almost hyperbolic paths, and I think the curves are reflected about the center of the picture. Meanwhile, the ISS track is very straight.

Is this just a fisheye effect? If so, why does the ISS track, which would normally be sinusoidal (not hyperbolic) appear straight instead of smoothly curved or even "bent" by the effect.

BMAONE23 · Post by **BMAONE23** » Mon Aug 20, 2007 1:55 pm

Iamlucky13
I think you are right concerning the "Fish Eye" effect in the image.
It does appear thet Polar North is Up and out of the image.

Also, the translucent ribbing at the top of the observatory is likely due to the top portion being rotated during the time the camera lens was open.

bers99 · Post by **bers99** » Sun Sep 23, 2007 4:02 pm

BMAONE23 wrote:Iamlucky13
I think you are right concerning the "Fish Eye" effect in the image.
It does appear thet Polar North is Up and out of the image.

Also, the translucent ribbing at the top of the observatory is likely due to the top portion being rotated during the time the camera lens was open.

+1