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Contains:  eta Car nebula, NGC 3372
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Carina Nebula, 





    
        

            Jeff
Carina Nebula

Carina Nebula

Technical card

Imaging telescope or lens:SkyWatcher Esprit 120ED APO

Imaging camera:ZWO ASI094MC Pro

Mount:Software Bisque Paramount MX

Guiding telescope or lens:William Optics 50mm Guide Scope

Software:PixInsight

Resolution: 3000x3800

Dates:Jan. 5, 2018

Frames:
12x300"
16x600"

Integration: 3.7 hours

Avg. Moon age: 18.63 days

Avg. Moon phase: 84.05%

Astrometry.net job: 2924156

RA center: 161.174 degrees

DEC center: -59.753 degrees

Pixel scale: 1.170 arcsec/pixel

Orientation: 356.669 degrees

Field radius: 0.787 degrees

Data source: Backyard

Description

Reprocessed data from January 2018.

Summarised from Wikipedia:

The Carina nebula is bright at magnitude +1.0, and spans an area of 120×20 arcminutes. Some of its interesting features are the Keyhole Nebula just above the centre of this this image, and the Homunculus Nebula (just to the left) surrounding the massive star system Eta Carinae. Eta Carinae contains at least two stars and has a combined luminosity more than five million times that of the Sun.

Previously a 4th-magnitude star, Eta Carina brightened in 1837 to become brighter than Rigel marking the start of the "Great Eruption" (resulting in the Homunculus Nebula). By March 1843 it became the second-brightest star in the sky fading well below naked eye visibility after 1856. In a smaller eruption, it reached 6th magnitude in 1892 before fading again. It has brightened consistently since about 1940. According to Wikipedia, its magnitute has recently increased from 4.8 in 2011, to 4.6 in 2013, then 4.3 in 2018.

Will Eta Carinae be the next to blow!

The overwhelming probability is that the next supernova observed in the Milky Way will originate from an unknown white dwarf or anonymous red supergiant, very likely not even visible to the naked eye. Nevertheless, the prospect of a supernova originating from an object as extreme, nearby, and well-studied as Eta Carinae arouses great interest.

When Eta Carinae eventually blows, it is not expected to produce a gamma-ray burst and its axis is not currently aimed near Earth. A gamma-ray burst in any case would need to be within a few light years of Earth to have any significant effects.

A typical core collapse supernova at the distance of Eta Carinae would peak at an apparent magnitude around −4, similar to Venus. At 7,500 light-years away it is unlikely to directly affect terrestrial lifeforms, as they will be protected from gamma rays by the atmosphere and from cosmic rays by the magnetosphere. The main damage would be restricted to the upper atmosphere, the ozone layer, spacecraft (including satellites), and any astronauts in space.

Comments

Author

jcoldrey
Jeff
License: Attribution Creative Commons
1780
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Carina Nebula, 





    
        

            Jeff