Deep Sky Object in Summer
M27 (Dumb-bell Nebula in Vulpecula)

Date & Time: Sep 23 2006, from 19:50 to 20:19 JST(+0900)
Composed 4 shots with 9 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D70 (Remodeled)
Location: Ooizumi vil., Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3008×2000)
CCD Sensitivity...ISO1250

M27 (NGC6853) / Planetary Nebula, type IIIa
R.A.19h 59m 36.0s (2000.0)
Dec.+22° 43' 00" (2000.0)
Apparent Size8×4'
Real Size2.26×1.13 light yrs.
Distance970 light yrs.
M27 (NGC6853), "Dumbbell Nebula" is a noted planetary nebula in the constellation of Vulpecula just south of Cygnus. Its odd shape has given this nickname. The nebula is bright and large, we can enjoy the humorous figure easily only with binoculars. I think good simile for this nebula is an apple's core.
The nebula is about 970 light years away, and luminous owing to a white dwarf star at the center with magnitude of 13.

⇒ Display the spectral profile of M27
(in new window)

M24(Star-cloud in Sagittarius)

M57(Ring Nebula)

Copyright(c) 2006 by Naoyuki Kurita, All rights reserved.
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