NGC 2736
{{short description|Supernova remnant in the constellation Vela}}
{{ Planetary nebula |
| image = Image:Pencil hst big.jpg
| name = NGC 2736
| caption = Hubble Space Telescope image of NGC 2736
| type = Supernova Remnant
| epoch = J2000
| ra = {{RA|9|0|17}}{{cite web
| title=NASA/IPAC EXTRAGALACTIC DATABASE
| work=Results for NGC 2736
| url=http://nedwww.ipac.caltech.edu
| access-date=2007-04-03}}
| dist_ly = 815
| appmag_v = +12.0?
| size_v = 30'x7'
| constellation = Vela{{cite web
| title=Hubble Heritage Site
| work=Results for NGC 2736
| url=http://heritage.stsci.edu/2003/16/fast_facts.html
| access-date=2007-04-03}}
| radius_ly = ~5.0
| absmag_v =
| notes =
| names = NGC 2736, Pencil Nebula
}}
NGC 2736 (also known as the Pencil Nebula) is a small part of the Vela Supernova Remnant, located near the Vela Pulsar in the constellation Vela. The nebula's linear appearance triggered its popular name. It resides about 815 light-years (250 parsecs) away from the Solar System. It is thought to be formed from part of the shock wave of the larger Vela Supernova Remnant. The Pencil Nebula is moving at roughly {{convert|644000|km/h|mph|sigfig=3|abbr=off}}
History
File:The Pencil Nebula, a strangely shaped leftover from a vast explosion.jpg left over after a supernova explosion that took place about 11 000 years ago.]]
On 1 March 1835, John Herschel discovered this object at the Cape of Good Hope and described it as "eeF, L, vvmE; an extraordinary long narrow ray of excessively feeble light; position 19 ±. At least 20' long, extending much beyond the limits of the field...". This agrees perfectly with the ESO- Uppsala listing N2736 = E260-N14, a nebula with dimensions 30'x7', position angle of 20 and notes "Luminous filament". {{interlanguage link|Harold Corwin|fr|Harold Glenn Corwin|ru|Корвин, Гарольд Гленн}} adds that on the ESO IIIa-F film this nebula is the brightest patch of a huge supernova remnant (Gum Nebula) whose delicate whisps cover the field. A relatively bright star is immersed in N2736 (mentioned by Herschel).{{cite web|url=https://ngcicproject.observers.org/papers/rngc5.htm|archive-url=https://archive.today/19991012164140/http://www.ngcic.org/papers/rngc5.htm|url-status=live|archive-date=1999-10-12|title=CORRECTIONS TO THE RNGC:5|author=Steve Gottlieb|author-link=Steve Gottlieb (amateur astronomer)|access-date=2025-03-19}}{{cbignore}}
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See also
References
{{reflist}}
External links
{{commonscat}}
- [http://www.space.com/17558-the-pencil-nebula.html Space.com article about NGC 2736]
- [http://www.nasa.gov/vision/universe/starsgalaxies/pencil_nebula.html NASA feature ] {{Webarchive|url=https://web.archive.org/web/20100712064036/http://www.nasa.gov/vision/universe/starsgalaxies/pencil_nebula.html |date=2010-07-12 }}
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{{Vela (constellation)}}
{{DEFAULTSORT:NGC 2736}}
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