Deep Sky Object in Winter
Gum Nebula (Supernova Remnant in Puppis & Vela)
| Date & Time: | Dec 20 2014, from 26:49 to 27:18 JST(+0900) |
| Composed 10shots with 3 minutes exposed |
| Optical: | SIGMA 18-35mm F1.8 DC HSM (f=35mm, F2.8) |
| with Astronomik CLS-CCD filter |
| Auto-guided with VIXEN ATLUX Equatorial |
| Digital Camera: | Canon EOS 550D (Remodeled) |
| Location: | Ooizumi, Hokuto city, Yamanashi pref. |
| Camera Settings: | Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456) |
| Sensitivity...ISO800 |
| Gum Nebula / Supernova Remnant |
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| R.A. | 08h 34m (around center) |
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| Dec. | -45° 00' (around center) |
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| Apparent Size | 40×90° |
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| Real Size | 950 light yrs. |
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| Magnitude | - |
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| Distance | 1500 light yrs.(center)
300 light yrs.(closest region) |
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In lower southern sky in winter night, an extraordinary vast but dimmed gGum Nebulah is spreading out with a size of 40×90 degrees.
The nebula is positioned in the Milky Way of Puppis to Vela.
The nebula with name of an astronomer, who investigated about the nebula, is considered a supernova remnant exploded about from 10 to 30 thousand years ago.
In Japan, I can capture images of only northern part of Gum Nebula, but its low altitude of meridian transit make difficult to take pictures of the nebula clearly.
This image shows you a limited area of Gum Nebula around the border of Puppis and Vela, equivalent a part of northeast region.
A circular nebulosity in center has an ID of Gum17.
The Gum Nebula has been grouped into some regions and assigned ID numbers because it's too large to regard as single celestial object.
Its whole figure has ring structure, looks like a swollen Veil Nebula in Cygnus.
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Constellations around Gum Nebula |
Click on image to enlarge
Center of Gum Nebula (Around Gum 17)
| Date & Time: | Feb 6 2021, from 23:50 to 24:47 JST(+0900) |
| Composed 20shots with 3 minutes exposed |
| Optical: | AF zoom-Nikkor 80-200mmF2.8ED (f=135mm, stop: F4.0) |
| with Astronomik CLS-CCD-FF filter |
| Auto-guided with TAKAHASHI JP Equatorial |
| 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...ISO2000 |
| Gum 15 / Diffused Nebula, Type E |
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| R.A. | 08h 44m 36.0s (2000.0) |
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| Dec. | -41°17' 00" (2000.0) |
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| Apparent Size | 20.0' |
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| Real Size | N/A |
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| Magnitude | - |
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| Distance | N/A |
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| Othe IDs | RCW 32 |
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| Gum 17 / Diffused Nebula, TypeE |
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| R.A. | 08h 49m 00.0s (2000.0) |
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| Dec. | -42 00' 00" (2000.0) |
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| Apparent Size | 95.0×80.0' |
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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 | RCW 33 |
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This image shows you around the central region of the Gum Nebula just west of λ Vel including remarkably bright H-alpha nebulae of Gum 15 and Gum 17.
Gum 15 is the most striking round nebula with a diameter of about 20 arc minutes, and a 90 arc minutes-span nebula of Gum 17 is lying just southeast of Gum 15.
Additionally, a dimmed round Gum 14 and a filamentary Gum 12 are distributed at northwest and southwest of Gum 15, respectively.
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Nebulae around Gum 17 |
