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Home Space Remote sensing

Upcoming 2013 ISON comet might be the brightest ever – set to shine as a full moon

Tibi Puiu by Tibi Puiu
February 6, 2013
in Remote sensing, Space
Photograph of Comet West, one of the greatest comets of all-time, taken by an amateur astronomer. (c)  John Laborde
Photograph of Comet West, one of the greatest comets of all-time, taken by an amateur astronomer. (c) John Laborde

Discovered last year by Russian astronomers Vitaly Nevsky and Artyom Novichonok, the gigantic ISON comet is set to make its appearance later this year as it approaches the sun when it will become visible to the naked eye during the day, and as bright as a full moon during the night.

Astronomers estimate the comet will reach its ‘perihelion passage’ – the closest point to the sun on the comet’s passage – in late November and will appear in the Northern hemisphere sky. Scientists fave found similarities between the ISON coment and that of the Great comet in 1680, also known as ‘Kirch’s Comet’ or ‘Newton’s Comet’, when it was reported to be bright enough to be seen in the daytime. Astronomers are expecting something similar from ISON.

Estimates are very difficult to make, since there are a lot of factors at play. The ISON comet might, for instance, break up in multiple smaller pieces that would significantly dim its brightness during its approach to the sun. Still, scientists hope ice particles will vaporize in the comet’s body, resulting in the massive, bright tail.

Popular astronomy author Guy Ottewell said in his 2013 Astronomical Calendar that the comet resembles “…a lighted match at the sun’s edge,” during the day. “Using what formulas we can for magnitude, we have it reaching -12.6, the brightness of the full moon!”

Comet C/2012 S1 (ISON) photographed at the RAS Observatory. (c) Remanzacco Observatory/Ernesto Guido, Giovanni Sostero & Nick Howes
Comet C/2012 S1 (ISON) photographed at the RAS Observatory. (c) Remanzacco Observatory/Ernesto Guido, Giovanni Sostero & Nick Howes

Scientists have been able to track the origin of ISON to the Oort cloud, which is a bunch of frozen rock and ice which circles the sun at a distance which is 50,000 times larger than that of the Earth’s orbit or 1 light-year away. For those living in the Southern hemisphere, do not be too dishearten since you will still be able to enjoy Comet Pan-STARRS – a great astronomical event, thought maybe not as spectacular as ISON – which will be visible from January and reach its brightest in March.

UPDATE: video footage of the ISON comet passing through the solar system as captured by NASA’s Deep Impact spacracraft has been released.

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Tags: cometcomet pan-starrsISON comet
Tibi Puiu

Tibi Puiu

Tibi is a science journalist and co-founder of ZME Science. He writes mainly about emerging tech, physics, climate, and space. In his spare time, Tibi likes to make weird music on his computer and groom felines.

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