While we make a big deal of the two annual equinox and solstice events, most people don’t realize that there’s a point when the earth is closer to the sun than at any other time during the year (perihelion) or as far away as we can get from our local star (aphelion, pronounced “ap-helion,” not “afeelion”). Perihelion is always in the first few days of January in our current epoch; aphelion comes in early July.
The earth’s orbit is an ellipse, with the sun sitting on one of the two foci of that ellipse. Because it’s not exactly a circle, there are times during the year when the earth is a little closer or a little further away from the sun than average – about 3% closer. According to the web site In The Sky (http://in-the-sky.org) the earth was at perihelion at 06:59 EST, Saturday 4 January 2014. This was just before sunrise this morning (which took place at 7:52 AM EST here in Hamilton).
I went out to take a photo of the sun on the morning of perihelion 2014. I hadn’t been following the news, and so was pleasantly surprised to spot the big sunspot on the visible disk (AR 1944) in the camera view-finder.
The photo of the sun above was taken from the LaSalle Marina in Burlington, Ontario at 10 AM EST, 4 January 2014, three hours after perihelion. The large sunspot in the lower left has been designated AR 1944 and is one of the largest this cycle. Taken with a 150-500 mm Sigma telephoto zoom lens and 1.4x teleconverter on a Nikon D7000 body; solar filter was an Orion mylar filter for white light. Conditions were not ideal – a great deal of wind, quite cold, and high, diffuse clouds.
Copyright © 2014 David Allan Galbraith