Deep Sky Object in Winter
Around IC405, IC410 (Diffused Nebulae in Auriga)
Click on image to enlarge
| Date & Time: | Sep 30 2017, from 27:16 to 27:54 JST(+0900) |
| Mosaic of 2 flames of 4 shots composed with 5 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial & SBIG STV |
| Digital Camera: | Canon EOS 6D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648) |
| Sensitivity...ISO2500 |
Objects around IC405,IC410
Italic indicates IDs 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.
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| IC405 / Diffused Nebula, type 2 E |
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| R.A. | 05h 16m 12.0s (2000.0) |
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| Dec. | +34° 16' 00" (2000.0) |
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| Apparent Size | 30×45' |
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| Real Size | 19×12 light yrs. |
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| Magnitude | - |
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| Distance | 2200 light yrs. |
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| Other IDs | LBN795 |
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|
| IC410 / Diffused Nebula, type 2 E |
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| R.A. | 05h 22m 36.0s (2000.0) |
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| Dec. | +33° 31' 00" (2000.0) |
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| Apparent Size | 23×20' |
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| Real Size | 15×13 light yrs. |
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| Magnitude | - |
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| Distance | 2200 light yrs. |
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| Other IDs | Sh2-236, LBN807 |
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|
| IC417 / Diffused Nebula, type 2 E |
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| R.A. | 05h 28m 17.0s (2000.0) |
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| Dec. | +34° 25' 00" (2000.0) |
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| Apparent Size | 13×8.5' |
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| Real Size | 26 light yrs. |
|---|
| Magnitude | - |
|---|
| Distance | 7500 light yrs. |
|---|
| Other IDs | Sh2-234, LBN804 |
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|
Click on image to enlarge
Wide-field image around IC405, IC410
| Date & Time: | Dec 9 2018, from 20:54 to 21:57 JST(+0900) |
| Mosaic of 2 flames that are RGB-composed from 3min.×10shots each |
| Optical: | (GB image) TAMRON SP 300mmF2.8 (Stop: F3.5) with IDAS LPS-P2 Light-pollution suppression filter |
| (R image) TAMRON SP 300mmF2.8 (Stop: F3.5) with R64 filter |
| Auto-guided with TAKAHASHI JP Equatorial |
| Digital Camera: | (GB image) Nikon D810A |
| (R image) Canon EOS 6D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF |
| Device Size...36×24 mm |
| Sensitivity...ISO1600(GB image), ISO500(R image) |
Objects around IC405,IC410
Italic indicates IDs of open clusters
|
This picture shows you a wide-field around IC405 and IC410 with a size of 8.0×6.2°.
You can see two major open clusters of M36 and M38 in east of those nebulae.
And other emission nebulae like Sh2-232 has positioned in eastern edge of the image.
Additionally you can appreciate that faint reddish nebulae have been distributed in the whole of this field.
|
Click on image to enlarge
Magnified image of IC405
| Date & Time: | Dec 4 2021, from 21:34 to 22:22 JST(+0900) |
| Composed 12 shots with 4 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial |
| CMOS Camera: | ZWO ASI183MC |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording format...32bit FITS(2×2 binning), converted to 16bit TIFF(2744×1836) |
| Device Size...13.2×8.8mm, Gain...400 |
This image shows you a magnified field of the northern part of IC405. A glittering star a bit lower central part is AE Aurigae (Runaway Star).
You can detect that the surrounding region is reflecting bluish light of the star directly, and the outer region is emitting reddish Hα light from the activated hydrogen atoms.
