| Date & Time: | Apr 9 2022, from 26:08 to 26:48 JST(+0900) |
| Composed 6 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 JP Equatorial+SBIG STV |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -20°C) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Abell 45 / Planetary Nebula, type IIIb |
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| R.A. | 18h 30m 16.1s (2000.0) |
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| Dec. | -11°36' 56" (2000.0) |
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| Apparent Size | 4.8' |
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| Real Size | N/A |
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| Magnitude | - |
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| Distance | N/A |
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| Other IDs | PK 20-0.1 |
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| IC1287 / Reflection Nebula, type 3 R |
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| R.A. | 18h 31m 15.0s (2000.0) |
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| Dec. | -10°49' 15" (2000.0) |
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| Apparent Size | 18.0'×12.0 |
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| Real Size | 3.6 light yrs. |
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| Magnitude | - |
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| Distance | 690 light yrs. |
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| Other IDs | vdB124, LBN 76 |
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This star field covers around 3 degrees south of alpha Scuti. It corresponds to just east of a vast Hα nebula of Sh2-54 in Serpens, contains some minor nebulae.
In upper part of the image, a bluish reflection nebula of IC1287 has been distributed around a 6th magnitude star with a span of 18×12 arc minutes.
At about 50 arc minutes south of IC1287, you can detect an indistinct planetary nebula of Abell45.
Although the nebula has an apparent diameter of 5 arc minutes and is emitting reddish light, actually the light is NII line from the ionized nitrogen atoms, not Hα line from the hydrogen atoms.
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Nebulae & Star clusters around Abell45 & IC1287
Italic indicates ID of open clusters |
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