Great triangle in summer

Constellation tour in Summer

Click on image to enlarge

Date & Time:	Jul 16 2021, from 26:14 to 26:40 JST(+0900)
	Composed 6 shots with 5 minutes exposed
Optical:	TAMRON 17-35mm Di OSD (f=17mm, stop: F3.5)
	with IDAS LPS-P2-FF Light-pollution suppression & Kenko PRO Softon Clear filters
	Auto-guided with EYEBELL CD-1 portable Equatorial
Digital Camera:	Canon EOS 550D (Remodeled)
Location:	Koumi town, Nagano pref.

Camera Settings:	Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
	Sensitivity...ISO800

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.

Crux

Scorpius

		Copyright(c) 2021 by Naoyuki Kurita, All rights reserved.
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