ПАРАД КОМЕТ

[ronatu]

A newly discovered comet could be the celestial spectacle of a century and light up the skies as bright as a full moon in 2013, its Russian discoverers say.
Amateur Russian skywatchers Artyom Novichonok and Vitali Nevski observed the object dubbed Comet ISON in September, Discovery.com reported.
"The object was slow and had a unique movement," Novichonok wrote on a comet-hunting blog.
"But we could not be certain that it was a comet, because the scale of our images are quite small and the object was very compact," he wrote of the object beyond the orbit of Jupiter.
However, follow-up observations confirmed the discovery.
In late 2013 Comet ISON is expected to pass extremely close to the sun, putting on a light show expected to be visible to the naked eye for skywatchers on Earth from early November through the first few weeks of January 2014.
The comet may be the brightest to appear in the sky since 1965 and may even be visible in daylight, the International Astronomical Union's Minor Planet Center predicted.

Если повезет это будут самые яркие объекты за последние 100 лет.

[ronatu]

Comet in 2013 could outshine the full moon
By Irene Klotz, Reuters
Posted: 12/31/2012 08:02:24 AM PST
Updated: 12/31/2012 08:02:56 AM PST

 

 
 
 
 
A comet blazing toward Earth could outshine the full moon when it passes by at the end of next year - if it survives its close encounter with the sun.
The recently discovered object, known as comet ISON, is due to fly within 1.2 million miles from the center of the sun on November 28, 2013, said astronomer Donald Yeomans, head of NASA's Near Earth Object Program at the Jet Propulsion Laboratory in Pasadena, Calif.
As the comet approaches, heat from the sun will vaporize ices in its body, creating what could be a spectacular tail that is visible in Earth's night sky without telescopes or even binoculars from about October 2013 through January 2014.
If the comet survives, that is.
Comet ISON could break apart as it nears the sun, or it could fail to produce a tail of ice particles visible from Earth.
Celestial visitors like Comet ISON hail from the Oort Cloud, a cluster of frozen rocks and ices that circle the sun about 50,000 times farther away than Earth's orbit. Every so often, one will be gravitationally bumped out from the cloud and begin a long solo orbit around the sun.
On September 21, two amateur astronomers from Russia spotted what appeared to be a comet in images taken by a 16-inch telescope that is part of the worldwide International Scientific Optical Network, or ISON, from which the object draws its name.

[ronatu]

Comet ISON's path is very similar to a comet that passed by Earth in 1680, one which was so bright its tail reportedly could be seen in daylight.
The projected orbit of comet ISON is so similar to the 1680 comet that some scientists are wondering if they are fragments from a common parent body.
"Comet ISON could be the brightest comet seen in many generations - brighter even than the full moon," wrote British astronomer David Whitehouse in The Independent.
In 2013, Earth has two shots at a comet show. Comet Pan-STARRS is due to pass by the planet in March, eight months before ISON's arrival.

NASA's Mars Curiosity rover may be able to provide a preview.

Comet ISON is due to pass by the red planet in September and could be a target for the rover from its vantage point inside Gale Crater.

[ronatu]

[ronatu]

Two 'Great Comets' in 2013, one of them 'Comet of the Century'

http://www.examiner.com/article/two-great-comets-2013-one-of-them-comet-of-the-century

[instml]

ronatu, ronatu     

http://novosti-kosmonavtiki.ru/forum/forum11/topic13257/

[Старый]

А из Москвы что-нибудь видно будет?

[instml]

Старый пишет:
А из Москвы что-нибудь видно будет?

Поведение комет сложно предсказать. Из Москвы вообще сложно что-либо увидеть, лучше из Подмосковья.

Пока в 2013 намечаются две кометы:

C/2011 L4 (PANSTARRS) начиная с середины марта
C/2012 S1 (ISON) начиная с ноября, возможно с максимальной яркостью как у полной Луны, но очень рядом с Солнцем на небе, далее, если комета переживает теснейшее сближение с Солнцем, она переходит на ночное небо с приличной яркостью

подробности http://novosti-kosmonavtiki.ru/forum/forum11/topic13257/

[Старый]

Конечно из подмосковья! Из самой средины подмосковных лесов.

[instml]

Старый пишет:
Конечно из подмосковья! Из самой средины подмосковных лесов.

Тогда больше шансов увидеть 2 кометы невооруженным глазом в 2013  

[Старый]

А будет хорошо видно? Высоко над горизонтом? Посредине ночи?

[pkl]

Так они что, одновременно будут на небе?

[Старый]

pkl пишет:
Так они что, одновременно будут на небе?

Да, одна в марте вторая в ноябре.

[instml]

Старый пишет:
А будет хорошо видно? Высоко над горизонтом? Посредине ночи?

Скорее низенько... По ISON возможны варианты, но перигелий у нее близкий, чуть больше 1 млн км от поверхности Солнца.

pkl пишет:
Так они что, одновременно будут на небе?

Нет.

[Старый]

instml пишет:
Скорее низенько... По ISON возможны варианты, но перигелий у нее близкий, чуть больше 1 млн км от поверхности Солнца.

Плохо.

[Assama]

Думаю, пора британским ученым выступить, что при переводе календаря Майя на современный ошиблись на год, и все будет в 2013. Когда на небе большая комета, в Конец света верится легче.

[ronatu]

Call me astro-scrooge if you like but it is far too early for astronomers to be making such predictions. Comets are notoriously fickle beasts. In the past they have disappointed as often as they have dazzled. Some of the web's more informed commentators have already noted this.

Ison was discovered on 21 September 2012 by astronomers Vitali Nevski and Artyom Novichonok using a 0.4 metre telescope located near Kislovodsk, Russia. The telescope forms part of the International Scientific Optical Network (Ison), which has given the comet its popular name. The comet's official designation is C/2012 S1 – not so catchy.

When discovered, it was as far away as Jupiter, five times as far from the sun as Earth.
By 28 November 2013, its orbit will have carried it to within 2m kilometres of the sun.
This is incredibly close. Inner planet Mercury never approaches the sun closer than 46m kilometres and yet its surface temperature reaches 700K (427C), hot enough to melt lead. A comet made of ice stands no chance.

Its frozen surface will turn into gas and escape into space. Some will create a gaseous coma around the mountain-sized nucleus; the rest will form the comet's tail. In general, the closer a comet comes to the sun, the brighter it becomes, because the more fiercely it is heated the more gas escapes. But this is not always the case. Every comet is an individual and there have been embarrassing letdowns in the past.

In 1989-90, everything was going well for Comet Austin until it crossed Mars's orbit. Then, for reasons that remain unclear, it simply failed to brighten much more, winding up some 250 times fainter than predicted.

The most infamous "dud" was Comet Kohoutek. First spotted in March 1973, astronomers thought it was entering the inner solar system for the first time and so would be loaded with pristine ice just ready to become an enormous tail. Time magazine called it "Comet of the Century" in its headline, paraphrasing astronomer Fred Whipple, who said that it "may well be the comet of the century". Both were proven wrong.

Kohoutek's nucleus partially broke up when it was still 20m kilometres from the sun and this may have been why it failed to live up to expectations. Even so, it became a naked eye object in the evening sky during January 1974 and, without the hype, it would have been perceived as a good comet.

This is worth bearing in mind for Ison and makes it an interesting case study for science communication. Can astronomers and the media accurately communicate the chance of a spectacular comet rather than imply the certainty of one?

Despite the tone of some reports, astronomers simply do not know enough about comets to make any firm predictions about Ison yet. As the year progresses we will know more; the comet will either continue to brighten or reach a plateau. This is an evolving situation and the comet could falter right at the very last. On 28 November Ison will pass 10 times more closely to the sun than Kohoutek, so there will be a strong chance it, too, will disintegrate.

Although it is too early to get really excited about Comet Ison, it's not too early to cross your fingers and hope.

[ronatu]

[ronatu]

И другой вариант:

[ronatu]

Открыватели