Constellation tour in Summer

Date & Time: May 3 2005, from 22:57 to 23:38 JST(+0900)
Mosaic of 2 images with 20 minutes exposed
Optical: SMC TAKUMAR f=105mm F2.4, Aperture: F4.0, with Cokin Diffuser-1 filter
Auto-guided with Kenko SKYMEMO Equatorial
Camera: PENTAX 67
Film: Ektachrome E200 (+1EV pushed)
Location: Hitachi-Oota city, Ibaraki pref.

ASCII/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.

Guide for Deep Sky Objects

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.
Hercules Cluster(Abell 2151) ...A galactic cluster positioned around a border to Serpent Caput, 460 million ly away
Abell 2199 ...A galactic cluster with NGC6166 as a central galaxy, 395 million ly away


Serpens & Ophiuchus

Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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