Deep Sky Object in Autumn
Around vdB152, LDN1217 (Wolf's Cave Nebula in Cepheus)
Click on image to enlarge
| Date & Time: | Sep 26 2025, from 22:13 to 23:49 JST(+0900) |
| Composed 12 shots with 8 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 light-pollution suppression filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial+Lacerta M-GEN |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -10°C) |
| Location: | Tamura city, Fukushima pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Objects around Wolf's Cave Nebula
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This image captures the distribution of faint nebulae located about 3.8 degrees east of β Cephei.
The bluish reflection nebula visible toward the bottom of the frame is vdB 152, where the southern edge of the molecular cloud reflects the light of a 9th-magnitude blue star.
Extending northward from this point is the dark nebula LDN 1217, stretching for more than 50 arcminutes like a wisp of smoke.
Because of its unique appearance, it is sometimes nicknamed the "Wolf's Cave Nebula."
About 50 arcminutes northeast of vdB 152 lies PK 111+11.1, which emits faint red Hα light.
Its shape is highly distorted, and it is classified as an evolved planetary nebula.
In addition, extending northeastward from vdB 152 is a filamentary nebula (LBN 538) that also emits Hα radiation.
Although its nature is not fully understood, it is thought to be part of a shock front generated by a nearby supernova explosion.
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| vdB152 / Reflection Nebula, type 3 R |
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| R.A. | 22h 13m 26.2s (2000.0) |
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| Dec. | +70°15' 16" (2000.0) |
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| Apparent Size | 10.0×3.0' |
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| Real Size | 4.0×1.2 light yrs. |
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| Magnitude | - |
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| Distance | 1400 light yrs. |
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| Other IDs | LBN531, Ced 201 |
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| LDN 1217 / Dark Nebula |
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| R.A. | 22h 13m 06.0s (2000.0) |
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| Dec. | +70°45' 00" (2000.0) |
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| Apparent Size | 28.2×52.2' |
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| Real Size | N/A |
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| Magnitude | - |
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| Distance | N/A |
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| PK 111+11.1 / Planetary Nebula |
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| R.A. | 22h 19m 33.9s (2000.0) |
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| Dec. | +70°56' 05" (2000.0) |
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| Apparent Size | 8.1' |
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| Real Size | 3.3 light yrs. |
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| Magnitude | - |
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| Distance | 1300 light yrs. |
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