December 6, 2011 15:25
Comets Creutz is a family original solar comets, the same ones that sometimes get in a zone of visibility coronagraph Soho as "scraping" and falling on Sun objects. Usually these are small fragments, probably caused by the collapsed about a thousand years ago by the Sun a large object. These invisible dark comets become visible only when the suit directly to the surface of the sun and a few days grow long bright tails, later pulled down, evaporating, or falling "directly" into the light.
What is so interesting comet Creutz? primarily for its unpredictability. they can in a matter of days to increase its brightness, from "zero" to the brightness above the brightness of all other comets. as a rule, from the discovery of such an object, up to the maximum brightness passing a matter of days or hours. it is very different from normal comets, has opened on the approach and the "expected" for six months, a year or more. the existence of comets Creutz, after their discovery well as highly transient. they are burnt, like moths to a flame, approaching too close to the sun …
Visibility conditions such as comets also not to be confused with comets and compare other types. you will not see them "in the middle of the night sky", because their orbits are too close to the sun … in the end, despite the fact that they sometimes exceed the brilliance of all the other comets, in most cases, these objects are invisible to the naked eye from Earth. this is explained in the first place-low position in the sky during a possible likely, and the brevity of the period, just before dawn, usually within one day. and the second, the light of the sun naturally scores themselves glitter comet, so the naked eye can see only the brightest ones.
However, from time to time in the family there called Cretu "Superobekty." And about them now and will be discussed … I must say that the appearance of such an object had been waiting for the last few years and many astronomers have favored the probability of its occurrence in the coming years, in particular, stated this in my transferable once NASA article I published it in his diary that there were two reasons, prescription of an event, and an increase in original solar comets in recent years. suggesting the possibility of approach to the sun, "pack" original solar comets, which almost certainly will be bulldozed. and now, like it happened …
According to recent estimates, the brilliance of comet C/2011 W3 (LOVEJOY) reaches -8 m for 16 December this year. Amazing value! At least two times the brightness of Venus. For example, shine the brightest in decades Comet Hale-Bopp reached only -0.7 m however, it should be remembered that the conditions it seems quite different. and because there is no way to tell how they will generally favorable. so can destroy the comet is approaching the sun and do not dial the brightness. and can increase it even more and become visible during the day, next to the Sun! as was the famous comet Ikeya-Seki in 1965.
By the way, the current object rather it resembles. and appear brighter comet Creutz not appeared since that of 1965. the very same comet Ikeya-Seki was considered the brightest comet of the last millennium. formally present the comet could be the brightest in the last 50 years. Incidentally, C/2011 W3 fit even closer to the solar surface. If Ikeya-Seki perihelion was 450 thousand km, C/2011 W3 then it equals a total of 180 thousand miles! This makes even less predictable its shine and even more difficult conditions for observation. Besides it at maximum brightness, the comet will pass behind the Sun relative to the Earth, and the maximum brightness is projected to reach around 4 am MSK. December 16.