On Sunday, Apr 27, 2003, at 22:42 US/Mountain, Patrick Wiggins wrote:
SLAS member Roger Butz caught an unusual sundog on film a few years back.
While the picture has been submitted to the SLAS site, for now you can see it as image #003 at
I was very curious about this photo of Roger Butz' having not seen anything like it myself. I found a good website ( http://www.sundog.clara.co.uk/atoptics/phenom.htm ) which has examples- both photographic and simulated - of all sorts of atmospheric phenomena. In Roger's photo you see the 22 degree radius Halo and another halo easily seen on the left side of the photo coming out of his 'fist'. This arc continues through his fist and can be traced through the bottom right portion of the photo. (The other 'arcs' in the photo - top right, left, and again near the right side of the fist- appear to be only clouds.) This second halo is the unusual bit. From the photos available on the website this second arc appears to be a Parhelic Circle, though there are no parhelia (sundogs) as far as I can tell in the photo. The Parhelic Circle is always very white (compared to the colors in the 22 degree Halo) and often mistaken for clouds. When it is complete it goes all around the sky. http://www.sundog.clara.co.uk/halo/circum.htm http://www.sundog.clara.co.uk/halo/parcirc.htm If anyone else has any other ideas and photographic examples of what the second halo is I would be very interested to hear. Dave Bennett
After looking at these fabulous images from the South Pole, I no longer think that second halo in Roger's photo is a Parhelic Circle. First, it doesn't emerge from a Sundog (parhelia) and secondly it does not appear to have the huge radius that the Parhelic Circle would have. Anybody else want to take a shot? http://www.sundog.clara.co.uk/halo/nnspsun.htm http://www.sundog.clara.co.uk/halo/nnspzen.htm http://www.sundog.clara.co.uk/halo/nnspan.htm On Monday, Apr 28, 2003, at 13:08 US/Mountain, David L Bennett wrote:
On Sunday, Apr 27, 2003, at 22:42 US/Mountain, Patrick Wiggins wrote:
SLAS member Roger Butz caught an unusual sundog on film a few years back.
While the picture has been submitted to the SLAS site, for now you can see it as image #003 at
I was very curious about this photo of Roger Butz' having not seen anything like it myself. I found a good website ( http://www.sundog.clara.co.uk/atoptics/phenom.htm ) which has examples- both photographic and simulated - of all sorts of atmospheric phenomena.
In Roger's photo you see the 22 degree radius Halo and another halo easily seen on the left side of the photo coming out of his 'fist'. This arc continues through his fist and can be traced through the bottom right portion of the photo. (The other 'arcs' in the photo - top right, left, and again near the right side of the fist- appear to be only clouds.)
This second halo is the unusual bit. From the photos available on the website this second arc appears to be a Parhelic Circle, though there are no parhelia (sundogs) as far as I can tell in the photo. The Parhelic Circle is always very white (compared to the colors in the 22 degree Halo) and often mistaken for clouds. When it is complete it goes all around the sky.
http://www.sundog.clara.co.uk/halo/circum.htm
http://www.sundog.clara.co.uk/halo/parcirc.htm
If anyone else has any other ideas and photographic examples of what the second halo is I would be very interested to hear.
Dave Bennett
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I'm not sure, but probably it has something to do with ice crystals high aloft. By coincidence, my article mentioning "brilliant halos and arcs" in the sky relating to Hurricane Nora was in today's Deseret News. Check out this URL: http://deseretnews.com/dn/view/0,1249,485033328,00.html Best wishes, Joe Joe Bauman science & military reporter Deseret News bau@desnews.com (801) 237-2169
Internal reflections in the camera lens? Brent --- David L Bennett <dlbennett@mac.com> wrote:
After looking at these fabulous images from the South Pole, I no longer think that second halo in Roger's photo is a Parhelic Circle. First, it doesn't emerge from a Sundog (parhelia) and secondly it does not appear to have the huge radius that the Parhelic Circle would have. Anybody else want to take a shot?
http://www.sundog.clara.co.uk/halo/nnspsun.htm http://www.sundog.clara.co.uk/halo/nnspzen.htm http://www.sundog.clara.co.uk/halo/nnspan.htm
On Monday, Apr 28, 2003, at 13:08 US/Mountain, David L Bennett wrote:
On Sunday, Apr 27, 2003, at 22:42 US/Mountain, Patrick Wiggins wrote:
SLAS member Roger Butz caught an unusual sundog
on film a few years
back.
While the picture has been submitted to the SLAS site, for now you can see it as image #003 at
I was very curious about this photo of Roger Butz' having not seen anything like it myself. I found a good website (
http://www.sundog.clara.co.uk/atoptics/phenom.htm ) which has examples- both photographic and simulated - of all sorts of atmospheric phenomena.
In Roger's photo you see the 22 degree radius Halo and another halo easily seen on the left side of the photo coming out of his 'fist'. This arc continues through his fist and can be traced through the bottom right portion of the photo. (The other 'arcs' in the photo - top right, left, and again near the right side of the fist- appear to be only clouds.)
This second halo is the unusual bit. From the photos available on the website this second arc appears to be a Parhelic Circle, though there are no parhelia (sundogs) as far as I can tell in the photo. The Parhelic Circle is always very white (compared to the colors in the 22 degree Halo) and often mistaken for clouds. When it is complete it goes all around the sky.
http://www.sundog.clara.co.uk/halo/circum.htm
http://www.sundog.clara.co.uk/halo/parcirc.htm
If anyone else has any other ideas and photographic examples of what the second halo is I would be very interested to hear.
Dave Bennett
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http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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it's still a mystery...I'll have to talk to Rog to get a better idea how big the secondary ring was. If it were right on a parhelia I'd say it was the Parhelic Circle... FYI, a Moondog is called a paraselene...Selene being the Greek Moon goddess...plural is paraselenae...learn something new everyday. Kim and I saw some at Riverside last year as well as a Lunar Tangent Arc. I'll post some pics on my website soon. Dave On Monday, April 28, 2003, at 07:13 PM, Patrick Wiggins wrote:
Brent Watson wrote:
Internal reflections in the camera lens?
I don't think so. Roger said he saw the extra ring naked eye.
Patrick
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participants (4)
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Brent Watson -
David L Bennett -
Joe Bauman -
Patrick Wiggins