![Drift Mode [composite] | by Steven Christenson](http://live.staticflickr.com/7244/7356102834_9466342c6e.jpg)
Drift Mode [composite]
I used a solar filter which renders the sun WHITE, not the orange you see here. The sun is SO bright that you have to stretch the data to see some of the grain, and orange/yellow helps to make the solar details easier to see. However since this is a STACK most of that good data is lost in the stacking process.
What is a stack? Photoshop people will know this as a "layer" but instead of using screen mode or lighten mode as one with a star trail, I used ***** mode.
For information about how Venus' motion differed according to your location on earth see: transitofvenus.nl/wp/where-when/local-transit-times/ enter "Trona Pinnacles, CA" in the search box. You'll notice from the slider that Venus doesn't move at a uniform speed. Lots of reasons including that the apparent motion of Venus across the face of the sun is due to a combination of: Venus' rotation around the sun; Earth's Rotation around the sun AND earth's rotation on it's axis. For super fun, enter "Manila, Phillipines" in the search box and you'll see something rather interesting. Advance the slider and you'll notice the ingress is slow but the egress is rapid. (It also makes a LOOP).
My results from Trona Pinnacles look quite linear - but I was using an Equatorial mount so was getting very little field rotation.
From our vantage point (Phil McGrew was with me), the motion was quite linear - see below for the forecast path.
© Copyright 2012, Steven Christenson
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All rights reserved. Curious what "all rights reserved means?" it means that without written permission you may not: copy, transmit, modify, use, print or display this image in any context other than as it appears in Flickr.
Drift Mode [composite]
I used a solar filter which renders the sun WHITE, not the orange you see here. The sun is SO bright that you have to stretch the data to see some of the grain, and orange/yellow helps to make the solar details easier to see. However since this is a STACK most of that good data is lost in the stacking process.
What is a stack? Photoshop people will know this as a "layer" but instead of using screen mode or lighten mode as one with a star trail, I used ***** mode.
For information about how Venus' motion differed according to your location on earth see: transitofvenus.nl/wp/where-when/local-transit-times/ enter "Trona Pinnacles, CA" in the search box. You'll notice from the slider that Venus doesn't move at a uniform speed. Lots of reasons including that the apparent motion of Venus across the face of the sun is due to a combination of: Venus' rotation around the sun; Earth's Rotation around the sun AND earth's rotation on it's axis. For super fun, enter "Manila, Phillipines" in the search box and you'll see something rather interesting. Advance the slider and you'll notice the ingress is slow but the egress is rapid. (It also makes a LOOP).
My results from Trona Pinnacles look quite linear - but I was using an Equatorial mount so was getting very little field rotation.
From our vantage point (Phil McGrew was with me), the motion was quite linear - see below for the forecast path.
© Copyright 2012, Steven Christenson
BLOG || Events || FaceBook || Twitter || 500px
All rights reserved. Curious what "all rights reserved means?" it means that without written permission you may not: copy, transmit, modify, use, print or display this image in any context other than as it appears in Flickr.