20 July 2004

20 July 2004

Observing LocationParkchester (South Condominium oval), The Bronx, NY
Atmospheric ConditionsAbout 50% fair weather cumulus cover. Warm and dry air.
InstrumentsCanon 15x50 Image Stabilized binoculars
Baader AstroSolar filter film in home made cell
Observing PartyCharlie Ridgway

TargetSun
Time20Jul04; 1348 EDT
CategorySun
CommentsThere is a huge sunspot on the face of the sun right now. spaceweather.com says that it is the size of the planet Jupiter. I can not remember seeing anything this big, even the umbra is big.

The picture below was taken with my Nikon CoolPix 950 digital camera. The camera was hand held behind one of the binocular eyepieces. The right limb is slightly darkened because the optical axes of the binoculars and camera were not perfectly aligned. Through the binoculars I could see more detail in all of the sunspots but the detail in the picture is noticeably lacking in the sunspots on the right hand side.


This image is the area of sunspot complex 652. It is magnified about 4x from the size of the picture originally captured. The penumbra around the sunspots is very evident. The photograph is not resolving the granularity that was evident in the "surface" of the sun, particularly near the limb, so you can't see the area surrounding the penumbra where I was not detecting any granularity.

Here is a SOHO satellite image of the sun taken a few minutes after my image.

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This is my personal record of my astronomical observations. It was written for my personal reference. The only reason it is in a blog is that a blog is a very convenient way to get the records formatted more or less uniformly and they will, hopefully, have greater longevity at Google where the servers are backed up than on my hard drive which never gets backed up. I occasionally include copyrighted material in my posts. I do this to make it convenient for me to access things I think I might want to refer to again. I think of this like making a photocopy of something I read that I put in a file where I can find it when I want it. As I understand copyright law, as explained in the DVD series Copyright Compliance by Chip Taylor Communications, this use is allowed under the Fair Use doctrine since I am not making any money on this blog, I don’t publicize the blog, and only occasionally post small excerpts of copyrighted works.


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