| Date & Time: | Oct 21 2023, from 24:48 to 26:00 JST(+0900) |
| Composed 10 shots with 8 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with LPS-D1 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial & SBIG STV |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -20°C) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Sh2-181 / Diffused Nebula, type 6 R |
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| R.A. | 00h 49m 16.6s (2000.0) |
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| Dec. | +65°12' 43" (2000.0) |
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| Apparent Size | 15.0×8.0' |
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| Real Size | 28×15 light yrs. |
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| Magnitude | - |
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| Distance | 6500 light yrs. |
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| Other IDs | LBN 614 |
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| Sh2-182 / Reflection Nebula, type R |
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| R.A. | 00h 50m 11.8s (2000.0) |
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| Dec. | +64°45' 46" (2000.0) |
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| Apparent Size | 2.0' |
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| Real Size | 6 light yrs. |
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| Magnitude | - |
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| Distance | 11000 light yrs. |
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This is a faint Hα emission nebula and a reflection nebula located approximately 4.5 degrees north of γ Cassiopeiae.
The faint, red Hα emission nebula situated upper part of the frame is known as Sh2-181 and has a size of about 15 arc minutes.
Its elongated shape in the north-south direction can be barely discerned.
About 26 arc minutes south of Sh2-181, there is a smaller reflection nebula, Sh2-182, with a size of approximately 2 arc minutes.
In the upper left corner of the frame, in the northeast part of Sh2-181, you can detect an even fainter Hα region extending.
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Objects around Sh2-181, 182 |
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