NGC2359 - Thors Helmet - a photo on Flickriver

            NGC 2359 (also known as Thor's Helmet) is an emission nebula in the constellation Canis Major. The nebula is approximately 11.96 thousand light years away and 30 light-years in size. The central star is the Wolf-Rayet star WR7, an extremely hot giant thought to be in a brief pre-supernova stage of evolution. It is similar in nature to the Bubble Nebula, but interactions with a nearby large molecular cloud are thought to have contributed to the more complex shape and curved bow-shock structure of Thor's Helmet.

It is also catalogued as Sharpless 2-298 and Gum 4.

The nebula has an overall bubble shape, but with complex filamentary structures. The nebula contains several hundred solar masses of ionised material, plus several thousand more of unionised gas. It is largely interstellar material swept up by winds from the central star, although some material does appear to be enriched with the products of fusion and is likely to come directly from the star.The expansion rate of different portions of the nebula varies from 10km/s to at least 30km/s, leading to age estimates of 78,500 - 236,000 years. The nebula has been studied at radio and x-ray wavelengths, but it is still unclear whether it was produced at the class O main sequence stage of development, as a red supergiant, luminous blue variable, or mainly as a Wolf-Rayet star.

Details:
Mount: Avalon Linear Fast reverse
Telescope: Orion Optics ODK10
Camera: QSI683 with Astrodon 3nm Ha and OIII filters

30x1800s Ha
25x1800s OIII

27.5 hours of total exposure
   

Taken on: December 27, 2015

Tags:

Sara Wager

Astrophotography

Astronomy

Astrodon

astronomia

Cosmos

DSO

Deep space

deep sky

deep sky DSO

emission

emission nebula

Gum4

Sh2-298

Thors

Helmet

nebula

nebulosity

nebulae

Stars

star

Space

Sky

Skies

Universe

ODK10

Orion Optics

Takahashi

QSI

QSI683

Avalon LInear fast reverse

Avalon

observatory

swagastro

NGC2359 « less

Sets appears in: • Astrophotography

Groups appears in: • Night Images • Astrophotography - Astronomy - Astrophysics more » • Long Exposure • After Dark - Night Photography • Astronomy • Gazing Into Outer Space • Nature - Astronomy • Deepsky • Night Sky, The • Galaxies & Stars Group ( Planets, Moons & Comets too!) • Astro Art • SPACE LOVERS • Deep Space Astrophotography • Astronomia • Cosmos • SightsAbove • Amateur Astronomy • Astronomy 123 • Space for All • Astronomical Images • TMI: your ART & NATURE **NO PEOPLE OR MAN-MADE OBJECTS** P1♥C1 • Astro-Photography and Similars • Astronomy, Stars, Planets and Space • OUT OF THIS WORLD • ASTROPHOTO • astro-photography • World Astronomy • astrophotoinsight • Astronomy for all • The Night Sky • Astrophotos • Insight Astronomy Photographer of the Year • The Lights Of The Night Sky • The Cosmos • Universe II • Narrowband Astrophotography • Sky @ Night • Night Sky Observations • Astronomy Photos • Astronomers Talk • Astrofotografia / Astrophotography • BBC Sky at Night and Stargazing Live • ASTROFOTOGRAFIA ASTROPHOTOGRAPHY • Sentinel of the Kosmos - Kaleidoscope to Astrophotography ★ • Starry Night Astrophotography • Astrofotógrafos del Mundo / World´s Astrophotographers • VirtualAstro • Universe Today • Sequence Generator • Backyard Astrophotography • Astronomy and Space Science - For Explorers of All Ages • Stars n' Stuff • Nebulae • BudgetAstro • Stargazy Island - Astronomy Group • APOD Submissions • astronomy on flickr • Flickr's Chosen Few ( F.C.F. ) !!TOTALLY CLOSED!! . • Astro Space • Astronomy Central • Amateur Astro-Photography • Deep Sky • Astrophotography - The Solar System and Beyond • AAPOD Submissions • Astro For Fun • Astrophotography And Nightscapes UK • StarStaX • Global Star Party • See & Be Seen • Night Photography and Long Exposure • The ONLY Amateur Astrophotography Ebook • Cinematic Reality • Best Award Distributors (Only on Invitation!) • The Universe: Astronomy Photography « less

Stats: 17,479 views / 88 comments

Link to this photo view:
Link to this photo large view: