Deep Sky Object in Autumn
Sh2-155 (Diffused Nebula in Cepheus)
Click on image to enlarge
| Date & Time: | Sep 23 2011, from 23:56 to 24:26 JST(+0900) |
| Composed 4 shots with 10 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 |
Click on image to enlarge
Close-up image of Sh2-155 (Cave Nebula)
| Date & Time: | Sep 30 2022, from 26:09 to 27:22 JST(+0900) |
| Composed 10 shots with 8 minutes exposed |
| Optical: | Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3) |
| with IDAS LPS-P1 Light-pollution suppression filter |
| Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN |
| Digital Camera: | Nikon D810A |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080) |
| Device Size...20×20mm |
| Sensitivity...ISO4000, White Balance...Daylight |
| Sh2-155 / Diffused Nebula, type 4 E |
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| R.A. | 22h 57m 00.0s (2000.0) |
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| Dec. | +62° 37' 00" (2000.0) |
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| Apparent Size | 14.0×11.0' |
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| Real Size | 40 light yrs. |
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| Magnitude | - |
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| Distance | 2380 light yrs. |
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| Other IDs | LBN529 |
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A small diffused nebula in eastern part of Cepheus is Sh2-155.
The nebula has a span of 14×11 arc minutes, and has a nickname of "Cave Nebula" because the distribution of dark nebula looks like a hole.
The field is near a border to Cassiopeia, we can find out various nebulae along the flow of Autumnal Milky Way.
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