Wednesday, December 10, 2014

Sun Pillar in Wildomar's Western Sky


Monday was another parhelia day. I saw a sundog in the morning and pulled over to take a quick picture. Upon examining the photos, I learned that my camera's landscape setting had overexposed and lost the color. A lesson I applied later in the day.

When driving home that evening, I saw a sun pillar. Based on the morning's experiment, I knew I had to not just pullover, but pull off the road where I could take my time with manual exposure settings to get the sun pillar:


The sun pillar is the column of light in the center, caused by the downward refraction of sunlight by ice crystals in the atmosphere. Light from the sun that would normally pass over my head is being bent downward so I see it as a column. I suspect the geometry refraction through ice crystals limits how high the pillar can be.

The phenomenon lasted for about 5 minutes, making timing critical.

jg

Monday, November 17, 2014

I loved AR2195, let it go, and now it's come back to me

AR 2195, the largest sunspot I've ever seen and photographed, rotated out of my view after Oct 28. Today, I captured it's return. The sunspot has shrunk, but it is still remarkable that it's visible.


jg

Saturday, November 15, 2014

Sunspot AR2192 sequence

I assembled my photos of sunspot AR2192 from October 20 to October 28, 2014 into this video:



I also added a reference to the size of Earth for comparison.

jg

Sunday, November 9, 2014

Wildomar is slipping into lightness

As is common for all the cities in my region, people tend to forget the lighting policies in place and upgrade or retrofit their businesses with lighting that fails to conform to the municipal codes. For example, this diagram illustrates the effect of poor choice of lighting fixtures recently installed at a business on Mission Trails Road in Wildomar:


Please note that I'm not criticizing the products or services of the business, just the lighting.

jg

Sunday, November 2, 2014

Season's Greetings

The first weather indicating a change of seasons has occurred, opening the start of the winter rainbow and sundog hunting season:

Superluminary Rainbow 
(superluminary refers to the duplicate violet bands)

Sundog on morning of 31 Oct. 2014

Prelude to the weather change on 30 Oct. 2014

jg

Sunday, October 26, 2014

Interrupting this Sunspot for an Eclipse

My sequence of images tracking sunspot AR2192 were interrupted by the moon, or a partial solar eclipse. Here's the partial eclipse at it's peak from last Thursday, 10/23/14:


Unlike the eclipse, the sunspot endures to this day,

I will post pictures of it soon.

jg

Tuesday, October 21, 2014

Still obsessing over the sunspot AR2192

Here are photos of sunspot AR2192 from today and yesterday. I wanted to see it it changed much since yesterday. I think not. Most of the difference appears to result from our changing angle of view as the rotating Sun brings the sunspot to the center.


Sunspot AT2192 on 21 October 2014

jg

Update: Photo from 22 Oct. 2014: