| Constellation tour in Autumn |
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| Date & Time: | Aug 7 2005, 26:32 JST(+0900), 20min. Exp. |
| 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: | Koumi town, Nagano pref. |
 ASCII/Astroarts StellaNavigator |
Cepheus is name of the ancient Ethiopian king, which of asterism can be found in the autumn's Milky Way just west of Cassiopeia's chair.
The constellation mainly consists of five stars with mostly third and fourth magnitude, and they forms a strained pentagon.
Constellation Cepheus is positioned at fairly northern region in the celestial sphere; there is the Polar star just outside of this picture downward.
The constellation includes various shaped diffuse and dark nebulae. The Cepheus is famous for the prototype of an important class of variables, delta Cephei, so-called "The Cepheid". The variable star Cepheid has the fixed period-luminosity relation. Studies in the period of pulsation and the apparent magnitude led astronomers to devise a method of gauging the distance to outer galaxies. So the variable is often compared to the Lighthouse in the universe, we couldn't see the remarkable progress in common astronomy without the Cepheid. |
Guide for Deep Sky Objects| IC1396 | .....Huge Diffused Nebula in the Milky Way |
| Dark nebulae around IC1396 | .....Wide-field image of distribution of dark nebulae in southern Cepheus. |
| IC1470 | .....Small diffused nebula near a boundary on Cassiopeia |
| NGC40 | .....Large reddish Planetary Nebula in NE region |
| NGC7139 | .....Small & red planetary nebula in pentagon of Cepheus |
| NGC7822 | ...Complicated H-alpha diffused nebula at the border to Cassiopeia |
| NGC6939 & NGC6946 | ...Open Cluster & spiral galaxy paralleled 0.7deg. apart around west edge. |
| NGC7023 | ...Tiny reflection nebula 6deg. NNW of alpha Cep. |
| NGC7133, NGC7142 | ...Reflection nebula & open cluster with 20' apart in central region |
| NGC7160 | ...A small open cluster in center of pentagon |
| NGC7235, NGC7261 | ...Two small open clusters in SE of pentagon |
| Sh2-129 | ...A dimmed semicircular diffused nebula 4 deg. west of IC1396 |
| Sh2-132 | ...Medium-sized diffused nebula 1 deg. SE of epsilon Cep |
| Sh2-135 | ...Small-sized diffused nebula in 1.5 deg. NW of zeta Cep. |
| Sh2-140 | ...Crescent-shaped nebula about 5deg. north of zeta Cep. |
| Sh2-142 | ...Small reddish nebula positioned in southeast edge of Cep. |
| Cave Nebula(Sh2-155) | ...Small diffused & dark nebula near a border to Cas. |
 Cassiopeia |
 Perseus |
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Copyright(c) 2005 by Naoyuki Kurita, All rights reserved. |
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