Deep Sky Object in Winter
Around IC405, IC410 (Diffused Nebulae in Auriga)

Date & Time: Oct 12 2012, from 27:13 to 28:26 JST(+0900)
Mosaic of 3 flames of 3 shots composed with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with Astronomik CLS-CCD filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO1600

Objects around IC405, IC410

Objects around IC405,IC410
Italic indicates #'s of open clusters
This picture shows you faint diffused nebulae in the pentagon of Auriga, right and left parts are named IC405 and IC410 respectively. IC405 has a very faint band-shaped gas being stretched westward, and looks like a "comma" on the whole.
There is a bluish variable star "AE Aurigae" with 6th magnitude at the center of IC405, known as "The Runaway Star". The variable has born in The Great Orion Nebula (M42) and jumped from the nebula. The star is just passing through IC405 by chance, and brightening the nebula by giving energy and activating the hydrogen molecules. When AE Aurigae goes away from IC405 in far future, the nebula will lose its brilliancy and become a dark nebula.
You can find another compact diffused nebula of IC417 in left hand side of the image. The nebula is lying at over 3 times farther than two nebulae of IC405 and IC410, sometimes called "Spider Nebula" from its shape with several gaseous stripes.

To Monochrome emphasized image

IC405 / Diffused Nebula, type 2 E
R.A.05h 16m 12.0s (2000.0)
Dec.+34° 16' 00" (2000.0)
Apparent Size30×45'
Real Size19×12 light yrs.
Magnitude -
Distance2200 light yrs.
Other IDsLBN795
IC410 / Diffused Nebula, type 2 E
R.A.05h 22m 36.0s (2000.0)
Dec.+33° 31' 00" (2000.0)
Apparent Size23×20'
Real Size15×13 light yrs.
Magnitude -
Distance2200 light yrs.
Other IDsSh2-236, LBN807
IC417 / Diffused Nebula, type 2 E
R.A.05h 28m 17.0s (2000.0)
Dec.+34° 25' 00" (2000.0)
Apparent Size13×8.5'
Real Size26 light yrs.
Magnitude -
Distance7500 light yrs.
Other IDsSh2-234, LBN804



Copyright(c) 2012 by Naoyuki Kurita, All rights reserved.
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