Deep Sky Object in Summer
Sh2-120 & Sh2-121 (Diffused Nebulae in Cygnus)
Click on image to enlarge
| Date & Time: | Jul 16 2021, from 25:57 to 26:42 JST(+0900) |
| Composed 10 shots with 5 minutes exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-V4 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN |
| Digital Camera: | Canon EOS 6D (Remodeled) |
| Location: | Koumi town, Nagano pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648) |
| Device Size...36×24mm, Sensitivity...ISO3200 |
| Sh2-120 / Diffused Nebula, type E |
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| R.A. | 21h 03m 44.5s (2000.0) |
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| Dec. | +49°51' 55" (2000.0) |
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| Apparent Size | 1.0' |
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| Real Size | Approx. 7 light yrs. |
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| Magnitude | - |
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| Distance | 24500 light yrs. |
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| Other IDs | - |
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| Sh2-121 / Diffused Nebula, type E |
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| R.A. | 21h 05m 15.6s (2000.0) |
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| Dec. | +49°39' 42" (2000.0) |
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| Apparent Size | 1.0' |
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| Real Size | Approx. 4 light yrs. |
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| Magnitude | - |
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| Distance | 14700 light yrs. |
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| Other IDs | - |
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This image has captured two tiny H-alpha nebulae paralleling with an interval of 20 arc minutes at about 5 degrees north of the North American Nebula (NGC7000) in Cygnus.
Nebulae in upper right-hand side and lower left-hand side have IDs of Sh2-120 and Sh2-121 respectively.
Both nebulae have spans of at most an arc minute and are floating from 15 to 25 thousand light years away.
You can attract notice on a lane of dark nebula crossing just west of the nebulae.
This image has been cropped with an equivalent focal length of 700mm.
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