Deep Sky Object in Winter
Horse Head Nebula & NGC2024 in Orion
Click on image to enlarge
| Date & Time: | Dec 10 2021, from 24:49 to 26:16 JST(+0900) |
| Composed 18 shots with 5min. exposed |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-V4 Light-pollution suppression filter |
| Auto-guided with TAKAHASHI JP Equatorial & SBIG STV |
| Digital Camera: | Canon EOS 6D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648) |
| Sensitivity...ISO2500 |
There are two unique diffused nebulae around ζ Ori (Altanik).
Firstly, a faint and vast one spread at south of Altanik is famous as "The Horsehead Nebula, Barnard 33",
a reddish nebula as a background of the horsehead-shaped dark cloud is registered in a catalogue as IC434,
that is spread to about 3.5 degree SW, around The Great Orion Nebula M42. It's extremely difficult to detect with our eyes.
The other one just east of Altanik, NGC2024 is able to be seen with naked eyes in good conditioned sky (of course needs binoculars or scopes).
It has about a same size with full moon, and complicated shaped dark filaments divide the nebula into two parts of east and west.
The gaseous nebula has a nickname of "The Christmas Tree Nebula" in English, but has no popular name in Japan.
This image has been cropped with an equivalent focal length of 700mm.
To Close-up of Horse-head Nebula
To Close-up of NGC2024
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Objects around Horse head nebula
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| B33 / Dark Nebula, type 4 Ir |
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| R.A. | 05h 41m 1.8s (2000.0) |
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| Dec. | -02° 24' 40" (2000.0) |
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| Apparent Size | - |
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| Real Size | N/A |
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| Magnitude | - |
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| Distance | 1300 light yrs. |
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| Other IDs | LDN1630 |
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| IC434 / Diffused Nebula, type 1 E |
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| R.A. | 05h 41m 0.0s (2000.0) |
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| Dec. | -02° 24' 00" (2000.0) |
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| Apparent Size | 60×10' |
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| Real Size | 22.7×3.8 light yrs. |
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| Magnitude | - |
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| Distance | 1300 light yrs. |
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| Other IDs | LBN954 |
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| NGC2024 / Diffused Nebula, type 1 E |
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| R.A. | 05h 41m 54.0s (2000.0) |
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| Dec. | -01° 51' 00" (2000.0) |
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| Apparent Size | 30' |
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| Real Size | 11 light yrs. |
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| Magnitude | - |
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| Distance | 1300 light yrs. |
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| Other IDs | Sh2-277 |
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