Great triangle in summer
|Constellation tour in Summer
|Date & Time: ||Sep 20 2014, from 19:37 to 19:47 JST(+0900)
|Composed 4shots with 3 minutes exposed|
|Optical: ||SIGMA 18-35mm F1.8 DC HSM (f=18mm, F2.8)
|with Astronomik CLS-CCD filter|
|Auto-guided with VIXEN ATLUX Equatorial
|Digital Camera: ||Canon EOS 550D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
The "Great triangle in summer" is a huge triangle being a good mark to explorer in summer night skies.
The triangle consists of Altair in Aquila, Vega in Lyra, and Deneb in Cygnus.
The triangle has the meridian transit around the zenith at many countries in Northern Hemisphere,
so we can see this asterism fairly long period in a year. We can see it at dawn east sky in February, and still appreciate going down to evening western horizon in December.