Tag Archives: 2017

61 Cygni – Binary Star System

61 Cygni is a famous binary star system located in the constellation Cygnus. The two stars, both dwarf stars that show a neat orange tint, and both are smaller and more faint than our Sun. The two stars take nearly 700 years to complete a single orbit around each other. They are also famous for exhibiting a large proper motion, motion across the sky as seen from Earth, of over 5 arc-seconds per year, it has been dubbed by some as “The Flying Star”. The large proper motion is at least partly addressed by the stars close proximity to the Earth, only about 11 light-years away.

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 800, 45 second exposure using Backyard EOS, no darks or bias frames, guided using a Canon 400mm lens with an attached ZWO ASI290MC camera. Image Date: September 9, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Additional information:

EarthSky (http://earthsky.org/brightest-stars/61-cygni-suns-near-neighbor)

Wikipedia (https://en.wikipedia.org/wiki/61_Cygni)

Sky and Telescope (http://www.skyandtelescope.com/observing/on-the-move-with-barnards-star-and-61-cygni06032105/)

…Tom

Northern Hemisphere Morning Stars – September 19, 2017

A quick shot of the morning stars this morning, September 19, 2017 peaking out of the morning fog. The brighter stars have been highlighted.

Tech Specs: Canon 6D, Canon EF17-40mm f/4L USM, single 25 second exposure, ISO 4000, f/4, 17mm, tripod mounted. Location: Hickory Run State Park, Pennsylvania.

…Tom

Delta Cephei – Cepheid Variable Star and Double Star

Delta Cephei is the prototype Cepheid variable, a class of giant stars that change brightness with periods proportional to their luminosity. You can read more about the variable nature of this star at EarthSky (http://earthsky.org/brightest-stars/delta-cephei-the-kings-famous-variable-star). This image shows the visual binary system. Delta Cephei is the brighter, yellow-toned star, and the companion has a slight bluish color. The blue companion is about 40 arc seconds away and is magnitude 7.5.
 
Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 10 second single exposure using Backyard EOS, no darks or bias frames. Image Date: September 4, 2017. Location: The Dark Side Observatory in Weatherly, PA.
 
Additional Information:
…Tom

Zeta Lyrae – Double Star

I found myself wandering around with the telescope in a double star mood, it has been a long time since I viewed many of these and the first time imaging them. This is the binary system Zeta Lyrae, also referred to as Zeta 1 Lyrae and Zeta 2 Lyrae. The distance to this system is roughly 150 light years and their magnitudes are 4.3 and 5.7 respectively.

Tech Specs: Meade 12” LX90, Celestron CGEM-DX mount, Canon 6D stock camera, ISO 3200, 10 second single exposure using Backyard EOS, no darks or bias frames. Image Date: September 4, 2017. Location: The Dark Side Observatory in Weatherly, PA.

Additional information:

Wikipedia (https://en.wikipedia.org/wiki/Zeta1_Lyrae)

…Tom

Morning Stars – September 13, 2017

Here is a view from the morning of September 13, 2017 showing the moon and the winter stars shining more prominently in the morning skies. How many of the brighter stars can you name in this image? Venus is hidden in the clouds on the lower left.

Tech Specs: Canon 6D, Canon EF17-40mm f/4L USM lens, three image composite with each image being 8 seconds at ISO 3200, f/4, 17mm. Images pieced together using Microsoft Image Composite Editor (Microsoft ICE). Date: September 13, 2017 Location: Hickory Run State Park, Pennsylvania.

…Tom

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