Archive for July, 2017

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Binocular double stars in Draco: my article in the August 2017 Sky & Telescope

July 6, 2017

This one came about by accident. In February, 2016, I went down to Borrego Springs, California, to give a talk at the Western Association of Vertebrate Paleontologists annual meeting. After the conference, I went up to camp for the night at Culp Valley Campground in Anza-Borrego Desert State Park. Anza-Borrego is a dark place to start with, and Culp Valley is up around 3500 feet and even farther from any towns or buildings, so it is stupid dark up there.

I got almost all the way around the sky with my binos that night, both in the early evening and then again before dawn. I was struck by how many nice binocular double stars there were in Draco. At first I was thinking I might use 3 or 4 of the best as the basis for a Binocular Highlight column, but pretty soon I was up to a dozen and I realized that I had enough ammo for an observing feature. I went back out this spring with a whole range of binoculars, up to and including mounted 15x70s, to re-observe and take notes. There are 20 doubles listed in the article, and although a few of them will require big binos to split cleanly, most can be split with 10×50 or even 7×35 binoculars, and a couple can probably be split with naked eyes if your vision is good.

If you want even more, or if you want to get a taste before you spring for a copy of the magazine, I also wrote an online feature with several more doubles that didn’t make the cut for the printed article. You can find that online feature here.

I’ve written for Sky & Tel on the Milky Way (twice), galaxies, and look-back time, and I’ve included individual double stars in Bino Highlight columns, but this is my first feature on double stars. What worked, what didn’t, what would you like to see in the future? The comment thread is open – I’ll look forward to hearing from you.

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