Deep Sky Object in Autumn
Around vdB150, LBN535, LDN1235 (Shark Nebula in Cepheus)
Click on image to enlarge
| Date & Time: | Sep 21 2025, from 23:55 to 25:47 JST(+0900) |
| Composed 15 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: | Furudono town, Fukushima pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Objects around Shark Nebula
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This image captures a faint nebula with a unique shape, located 4.5 degrees northeast of β Cephei.
The emission nebula LBN 535 extends about 2.5 degrees east to west, and at its northeastern end lie the reflection nebula vdB 150 and the dark nebula LDN 1235.
Because these nebulae resemble the profile of a shark facing left, they are affectionately known by the nickname "Shark Nebula."
However, the nebula itself is extremely faint and can only be seen in long-exposure images.
It represents part of the large molecular cloud known as the Cepheus Flare, which spreads across the northern region of Cepheus, and happens to present this striking appearance.
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| vdB150 / Reflection Nebula |
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| R.A. | 22h 09m 40.1s (2000.0) |
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| Dec. | +73°23' 27" (2000.0) |
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| Apparent Size | 5.7' |
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| Real Size | 1.7 light yrs. |
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| Magnitude | - |
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| Distance | 1000 light yrs. |
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| LBN 535 / Molecular Cloud, type 6 R |
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| R.A. | 22h 01m 00.0s (2000.0) |
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| Dec. | +72°54' 00" (2000.0) |
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| Apparent Size | 155.0×30.0' |
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| Real Size | 45×10 light yrs. |
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| Magnitude | - |
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| Distance | 1000 light yrs. |
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| LDN1235 / Dark Nebula |
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| R.A. | 22h 14m 55.0s (2000.0) |
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| Dec. | +73°25' 00" (2000.0) |
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| Apparent Size | 10.2×4.2' |
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| Real Size | N/A |
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| Magnitude | - |
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| Distance | N/A |
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