Constellation tour in Summer |
Date & Time: | Mar 20 2020, from 25:58 to 26:23 JST(+0900) |
Composed 6 shots with 5 minutes exposed | |
Optical: | AF zoom-Nikkor 24-85mm (f=24mm, stop: F4.0) |
with IDAS LPS-P2-FF Light-pollution suppression & Kenko PRO Softon[A] filters | |
Auto-guided with TAKAHASHI EM-200 Equatorial | |
Digital Camera: | Canon EOS 600D (Remodeled) |
Location: | Ooizumi, Hokuto city, Yamanashi pref. |
Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456) |
Sensitivity...ISO800 |
Astroarts StellaNavigator |
The Hercules is a fairly large constellation in summer, but isn't very obvious.
"Hercules" is a name of Greek hero, and the constellation is represented as a kneeling man with his head turning south. Though the constellation is faint, a fairly strained shape of "H" that forms Hercules' body is a good mark to find that. Alpha Herculis, Ras Algethi, is positioned at the kneeler's head has a magnitude of 3, ancient Chinese had regarded the star as the Emperor's seat, and they had observed this field very carefully whether there was any novae or comets. |
M13 | ...One of the finest Globular Clusters in summer skies |
M92 | ...Medium-sized globular cluster between Hercules's legs, 36 thousand ly. away |
NGC6210 | ...Small and elliptic planetary nebula 4deg. NE of beta Her. |
Abell 2147, 2152 | ...Two galaxy clusters paralleled with a deg.-interval positioned on a boundary to Serpens Caput |
Hercules Cluster(Abell 2151) | ...A galactic cluster positioned around a border to Serpent Caput, 460 million ly away |
Abell 2197 | ...A galactic cluster with NGC6160 & 6173 as central galaxies, 420 million ly away |
Abell 2199 | ...A galactic cluster with NGC6166 as a central galaxy, 395 million ly away |
Sh2-73 | ...Dimmed molecular cloud distributed at 4.5deg. west of βHer, on a boundary on Serpens Caput |
Aquila |
Serpens & Ophiuchus |
Copyright(c) 2020 by Naoyuki Kurita, All rights reserved. | ||
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