Автор Тема: Ищем кометы!  (Прочитано 326362 раз)

Игорь

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Re: Ищем кометы?
« Ответ #75 : Март 15, 2011, 23:00:55 »
Вот она, красотка! Мчит аж хвостик распустила!  ^-^
500mm f/8.3 МАК + SBIG STL-1001E, 12 кадров по 3 минуты в L фильтре, 200% кроп.

LeonidOS

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Re: Ищем кометы?
« Ответ #76 : Март 16, 2011, 21:38:34 »
Да там уже все запущено... А сколько писем...  >:( И если бы от вменяемых людей...
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LeonidOS

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Re: Ищем кометы?
« Ответ #77 : Март 16, 2011, 23:01:15 »
Как я писал ранее комета C/2010 X1 вблизи своего перигелия будет отлично видна на снимках космического коронографа SOHO. Как мне сообщил Карл Бэттэмс (Karl Battams, Naval Research Laboratory), планируется провести специальные наблюдения в 4-х различных фильтрах. Более того, оценивается техническая возможность временного перенацеливания космического аппарата STEREO-B на комету, входе их тесного сближения в конце июля – начале августа. Максимальное сближение произойдет 31 июля, в 13:00 UT. Расстояние между объектами составит всего 7.4 млн. км (0.04956 а.е.). Космический аппарат может пройти сквозь пылевой и ионный хвосты кометы. Второй вариант представляет большую угрозу для космического аппарата. Будем надеяться что эти наблюдения состоятся и будут успешными.
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ДЧ

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Re: Ищем кометы?
« Ответ #78 : Март 17, 2011, 00:03:56 »
А сколько писем...  >:( И если бы от вменяемых людей...

установка фильтра на слово "нибиру" может решить часть проблем

M

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Re: Ищем кометы?
« Ответ #79 : Март 17, 2011, 09:47:32 »
Насчет перенацеливания... достаточно смелое намерение. Не ожидал такого услышать.

LeonidOS

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Re: Ищем кометы?
« Ответ #80 : Март 17, 2011, 13:10:21 »
Ну если только самую малость, тогда нужно еще убирать коричневых карликов, магнитные полюса, землетрясения  ;D
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Игорь

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Re: Ищем кометы?
« Ответ #82 : Март 31, 2011, 09:19:40 »
Dear Sir/Madam,
   Iґm writting you from a Spanish website to request your help in order to get some confirmation for some news weґre preparing. Weґre writting a post about the recent discovery of comet "C-2010 X1". The thing is that the only information we have about the man who discovered this object, in december 2010, is that heґs called Leonid Elenin, who did the discovery in your observatory (http://en.wikipedia.org/wiki/C/2010_X1). And, in fact, the only similar name we could find about this case. No more official information is available in the internet, which is quite weird.
We would be very appreciated to you for any information we can get and any contact.
Thank you very much for your time and wish to hear from you as soon as possible.
Yours faithfully,
 
Rafael L. Garcнa del Valle

Игорь

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Re: Ищем кометы?
« Ответ #83 : Апрель 01, 2011, 01:49:55 »
 Книга "C/2010 X1 (Elenin) - первая комета в новейшей истории России"   :D

Напечатана первая, "тестовая" книга. Снимки прилагаю.

     В конце декабря 2010 года российская астрономическая общественность была взбудоражена впечатляющим открытием - наш соотечественник, сотрудник института прикладной математики им. Келдыша Леонид Еленин, в ходе обзорных наблюдений на обсерватории ISON-NM обнаружил новую комету. Исследования орбиты кометы в первое время после открытия показали, что объект может стать настолько ярким, что его можно будет легко наблюдать с использованием биноклей. Эта комета стала первой кометой в истории новой, постсоветской России. Основная цель данной книги - рассказать об этом замечательном открытии и помочь Вам, любители астрономии, в успешных наблюдениях этого великолепного объекта вблизи максимума его блеска, когда комета должна "отрастить" симпатичный хвостик (октябрь 2011 года; приводятся поисковые карты и описания условий видимости объекта). Кроме того, в книге приводится краткая информация о кометах и о способах их наблюдений. В заключение даётся эксклюзивное интервью с первооткрывателем хвостатой странницы - астрономом Леонидом Елениным. Книгу предваряет предисловие известного в России любителя астрономии Тимура Крячко.
     Даже когда комета Еленина пройдёт максимум, книга будет иметь методическо-историческую ценность; т.к. в книге приводится краткая информация о кометах, небольшая методика визуальных наблюдений комет, а также подробная история открытия и ранних наблюдений кометы C/2010 X1 (Elenin).

     Объём издания - 78 страниц.
     Для оформления заказа пишите мне личное сообщение или на электронный адрес - artnovich@inbox.ru

***

Содержание книги:

Содержание
Благодарности
Предисловие
1. Несколько слов о хвостатых гостьях
2. Краткая методика визуальных наблюдения комет
2.1. Оценивание интегрального блеска кометы
2.1.1. Метод Сидгвика
2.1.2. Метод Морриса
2.2. Оценивание диаметра комы
2.2.1. Метод дрейфа
2.2.2. Метод сравнения
2.3. Оценивание степени конденсации (DC)
2.4. Определение параметров кометных хвостов
3. C/2010 X1 (Elenin): первая комета в новейшей россий-ской истории
3.1. Обсерватория ISON-NM: путь к открытию
3.1.1. Общие принципы обзорных наблюдений
3.1.2. Принципы работы на удаленном телескопе
3.2. История открытия
3.3. История наблюдений и исследований
3.4. Взгляд вперед: описание условий видимости коме-ты Еленина в будущем
3.5. Эфемерида кометы и карта ее пути по небу
4. Интервью с астрономом Леонидом Елениным
Заключение

« Последнее редактирование: Апрель 01, 2011, 02:01:00 от Игорь »

Игорь

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Re: Ищем кометы?
« Ответ #84 : Апрель 04, 2011, 21:12:49 »
LeonidOS:

Комета C/2010 X1 (Elenin) может быть изучена с помощью одного из самых больших радиотелескопов Мира – Аресибо. Об этом стало известно совсем недавно. На мое письмо ответил Лэнц Беннер (Lance Benner), занимающийся лоцированием АСЗ с помощью 70-и метрового радиотелескопа Голдстоун (Goldstone). C его слов следует что лоцирование кометы с расстояния в 0.23 а.е. сложная задача для их радиотелескопа, для этой цели больше подойдет гигантский 300-метровый радиотелескоп Аресибо.

По словам Эллен Хоувелл (Ellen Howell), подобная работа на Аресибо проводилась и в 30-50% случаев была успешна. В комитет распределяющий наблюдательное время уже отправлена заявка на 4 наблюдательные ночи в период с 27 сентября по 10 ноября 2011 года. Надеюсь что эти наблюдения все же состоятся и они будут успешными!


Игорь

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Re: Ищем кометы?
« Ответ #85 : Апрель 10, 2011, 22:23:22 »
LeonidOS:

8 апреля на нашей обсерватории были проведены очередные наблюдения кометы C/2010 X1 (Elenin). Анализ результатов наблюдения говорит о быстром росте комы. Помимо внутренней, компактной газовой оболочки, на снимке видна и формирующаяся более разряженная внешняя кома, ее диаметр превышает 1 угловую минуту дуги, т.е. 80 000 км! Возможно что такой быстрый рост комы связан с «наложением» на нее пылевого хвоста кометы, который после противостояния так и  остается невидимым для земного наблюдателя.

Блеск кометы так же превысил рубеж 16-й звездной величины и по оценке Артема Новичонка составил 15.4m. Такая оценка подверждается первыми визуальными наблюджениями кометы, полученными Якубом Коукалом (Jakub Koukal) и Хуаном Гонсалесом (Juan José González), 4 и 5 апреля соответственно. Стоит отметить, что другой известный визуальный наблюдатель комет Алан Хейл (Alan Hale), ставший в 1995 году соавтором открытия кометы Хейла-Боппа, не смог обнаружить комету Еленина 5 апреля в свой 41-см рефлектор…

На снимке запечатлено и еще одно событие – сближение кометы Еленина и астероида 4336 Jasniewicz. Здесь близкое расположение объектов, которые разделяет всего 11 угловых минут, не оптический обман, а реальное, физически близкое расположение двух небесных тел. В момент съемки, дистанция между кометой и 6-и километровым астероидом, составляла всего 1 495 000 км (0.01 а.е.), что превышает среднюю дистанцию от Земли до Луны (LD) всего  в 3.9 раза. Максимальное сближения двух объектов состоялось на несколько часов раньше, они сблизились до 1 120 000 км (0.008 а.е.).

Игорь

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Re: Ищем кометы?
« Ответ #86 : Апрель 11, 2011, 01:59:59 »
http://astrobob.areavoices.com/2011/04/04/comet-elenin-will-not-destroy-the-earth/

Comet Elenin will not destroy the Earth

I did a search for Comet Elenin the other day and was surprised at how much gloom-and-doom blather has been written about this modest comet. The misinformation covers the full range of nonsense – everything from the name ‘Elenin’ being a coded message for ‘Extinction Level Event Notable Impact Nemesis’ to the comet being a secret brown dwarf star called Nibiru (which doesn’t exist). Some are even spreading the rumor that Leonid Elenin the person doesn’t actually exist.

Come on people!

Let’s shed a little light. Comet C/2010 X1 (Elenin) was discovered by Russian amateur Leonid Elenin on December 10, 2010. Although he lives in Lyubertsy, Russia, like many amateur astronomers, Elenin takes astrophotos ‘remotely’ using telescopes that can be controlled by a home computer. The night of his discovery he was taking routine photos of the sky at the independent Russian remote observatory ISON-NM (International Scientific Optical Network) near Mayhill, New Mexico.

By the way, Elenin is real guy who lives near Moscow, loves astronomy and studies asteroids and variable stars. He
a researcher at the Keldysh Institute of Applied Mathematics and volunteers at the International Astronomical Search Collaboration. Elenin also hosts a great website, where he frequently posts updates about his comet.

Elenin’s photos showed an extremely faint, tiny, teardrop-shaped fuzzball. After additional observations, astronomers determined that the comet’s orbit would bring it near the Earth later this summer, when it might become bright enough to see with the naked eye.

When I heard the news, I cheered. While naked eye comets aren’t rare, they’re not common either, with one making an appearance every couple years. Each is a joy to follow. Every comet observer hopes a bright one will show interesting activity in its nucleus and develop a pretty tail. People love a nice comet – remember Hale-Bopp back in 1997? A thing of beauty.

Further study of Comet Elenin’s orbit appeared to indicate that it was making its first-ever visit to the inner solar system. This happens routinely with comets, since, like your in-laws, so many come from great distances. Other comets, like Halley’s for instance, travel on closed oval orbits called an ellipses and revisit the Earth’s vicinity periodically. These are called the periodic comets.

Leonid Elenin has studied the orbit of his comet closely and predicts that gravitational tugs from the giant planets Jupiter and Saturn will likely reshape its orbit into a very long, cigar-shaped ellipse. The closed track would return the comet for another visit in about 10,000 years. Further observations will no doubt refine Elenin’s orbit and narrow the possibilities.

Comet Elenin orbits nearly in the same plane as the planets do. It’s currently in the constellation Leo the Lion and still very faint at 16th magnitude, well below the visual limit of most amateur telescopes. As it slowly moves closer to the sun, the comet should become visible in large scopes by early summer. Right now, it’s cruising out beyond Mars in the asteroid belt some 180 million miles from Earth and looks like a small, fuzzy spot in photographs.

On September 5, the comet will be near the orbit of Mercury and closest to the sun. Unfortunately, from our vantage point on Earth, Elenin will appear in the same direction in the sky as the sun and be lost in the solar glare. Things get better later that month, when the comet moves away from the sun’s direction and makes an appearance in the morning sky at dawn in Leo the Lion.

Closest approach to Earth happens on October 17 when the comet will be 21 million miles away from Earth and 2.4 million miles above our orbit. While we might appear close to each other in the diagram above, we’re still millions of miles apart. After that, we each go our separate ways as Elenin plunges back into deep space.

Here are some more facts:

* Comet Elenin doesn’t appear to be any different from numerous other comets. It’s orbiting the sun in a predictable manner.

* Much baloney has been sliced about the comet or its tail striking the Earth and wreaking havoc. The truth is Comet Elenin is so tiny, its gravitational effect on Earth is practically zero. Even at closest approach it’s still 21 million miles away. Every few years we get almost that close to Venus (23.7 million miles), a rocky planet nearly the same size as our own, and don’t suffer any ill effects. Like the comet, its pull on Earth is tiny, tiny, tiny.

What about a meteor shower from the comet’s tail? After all, most meteors we see originate from comet dust lost through their tails. Elenin appears to cross right through Earth’s orbit in the diagram above. Unfortunately my little picture doesn’t show the third dimension, but this one does.

The comet actually passes above our orbit, missing Earth in the vertical direction by some 2.4 million miles. The chance for an impact is zero. Even stray meteors are extremely unlikely. We’re close but not that close. Keep this in mind too – comet tails point away from the sun. When Elenin and Earth are closest, its tail will be directed back and away from us as depicted in the diagram above.

Even if Earth were to pass through the tail, at worst we’d see a meteor shower. That would be awesome!

I’ll settle on getting up before dawn with binoculars in hand, enjoying the subtle beauty of our fuzzy visitor while trying to comprehend the amazing fact that it arrived in Duluth’s sky after a journey of billions of miles.



Comet Elenin photographed on April 2 by German astrophotographer Bernhard Häusler. Because the comet moves in relation to the stars, the stars appear trailed during the exposure. Credit: Bernhard Bernhard Häusler

Russian amateur astronomer Leonid Elenin

An animation of Comet Elenin in March compiled from multiple still photographs. Credit: Bernhard Häusler

This simplified diagram shows Comet Elenin as it swings through the inner solar system, passing by Earth on the dates shown. The two bodies are closest on October 17. Positions shown are approximate. Illustration: Bob King

Игорь

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Re: Ищем кометы?
« Ответ #87 : Апрель 11, 2011, 02:04:19 »
http://crisisboom.com/2011/04/04/astronomers-comet-elenin/

Astronomers: Comet Elenin may produce greatest meteor showers in history

The unusual Comet Elenin is expected to pass within 21 million miles of Earth on October 16, 2011 and speeding by at more than 85,000 mph—so fast it could travel from Earth to the Moon in less than five hours.

Discovered by amateur Russian astronomer Leonid Elenin in Lyubertsy, Russia on December 10, 2010—who accessed the International Scientific Optical Network’s robotic observatory near Mayhill, New Mexico—the astronomical community has erupted with the excited possibility the celestial traveller could generate the most spectacular meteor showers ever recorded.

Although the comet’s path is expected to change as it draws closer to the sun, astronomical calculations appear to show Elenin’s perihelion occurring well inside Earth’s orbit by September 5th.

Astronomers believe the comet will be visible with a good pair of field binoculars about the middle of August. After then it should become visible in the Northern hemisphere’s predawn sky with the naked eye.

Comet watchers claim that the huge dust trail behind Elenin might become very bright with the tail glowing across the night sky.

The Earth is expected to pass through the giant tail, and the debris may generate fantastic meteor showers for as long as two and a half months.

Comet generates controversy and conspiracy theories

Recently, a growing number of conspiracy theories have sprung up around the discovery of the long-period comet. Some are linking its appearance on the other side of the sun to the 9.0 earthquake that devastated northern Japan. Others believe it may fulfill the “prediction” some read into the end of the Mayan calendar on December 21, 2012.

A few, with private channels to unnamed professional sky watchers claim the comet’s orbit is unstable and may encounter dark bodies such as the cometary debris known as the “Taurid objects.” They go on to argue that Elenin carries a huge cloud of material with it and if the orbital path remains consistent the Earth will collide with that debris.

Of course, many astronomers anticipate that happening. It’s why there would be astounding meteor showers after the comet’s passing.

Elenin’s orbital path seems to be constantly changing, however, as it falls inwards towards the sun.  As one observer has noted, when  Leonid Elenin discovered the comet calculations indicated it would pass by Earth at a distance almost nine times the distance of the Sun. Now, however, recalculations reveal that distance has significantly shrunk to as low as 0.15 AU.
Further perturbations in Elenin’s orbital path may be affected by it’s passage through the Oort belt—a huge halo of cometary bodies, giant asteroids and debris that encircles the outer solar system.

Will it strike Earth as some fear? No way, says Ray Villard of Space.com ["Will Earthbound Comet Fulfill 2012 Prophecy?"].
Villard points out that “The closest ever-recoded flyby of Earth was comet Lexell in 1770, which passed at 1.4 million miles. On Jan. 26th that year a magnitude 9.0 earthquake took place off the west coast of the North America.”

Comets and earthquakes again. Could there really be a connection after all?

Although some insist there is a connection ["NASA's Website Accidentally Predicts Another Catastrophic Earthquake in 2011"] virtually all astronomers and geophysicists say no way.

So what can be expected? Well, if all goes right the greatest night time sky show seen in hundreds of years will occur.

krypton

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Re: Ищем кометы?
« Ответ #88 : Апрель 14, 2011, 16:32:52 »
So-So Prospects for Comet Elenin

Цитировать
Last December, comet-lovers got a bit of an adrenaline rush when they learned that a new object, Comet Elenin (C/2010 X1), might reach naked-eye brightness a week or so after it reaches perihelion on September 10th.

It's still early in the game, but reports from visual and photographic observers over the past few weeks have tempered expectations somewhat.

S&T

Игорь

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Re: Ищем кометы?
« Ответ #89 : Май 06, 2011, 21:02:53 »
http://www.jpl.nasa.gov/news/news.cfm?release=2011-135

Comet Elenin: Preview of a Coming Attraction

May 04, 2011

You may have heard the news: Comet Elenin is coming to the inner-solar system this fall. Comet Elenin (also known by its astronomical name C/2010 X1), was first detected on Dec. 10, 2010 by Leonid Elenin, an observer in Lyubertsy, Russia, who made the discovery "remotely" using the ISON-NM observatory near Mayhill, New Mexico. At the time of the discovery, the comet was about 647 million kilometers (401 million miles) from Earth. Over the past four-and-a-half months, the comet has – as comets do – closed the distance to Earth's vicinity as it makes its way closer to perihelion (its closest point to the sun). As of May 4, Elenin's distance is about 274 million kilometers (170 million miles).

"That is what happens with these long-period comets that come in from way outside our planetary system," said Don Yeomans of NASA's Near-Earth Object Program Office at NASA's Jet Propulsion Laboratory in Pasadena, Calif. "They make these long, majestic, speedy arcs through our solar system, and sometimes they put on a great show. But not Elenin. Right now that comet looks kind of wimpy."

How does a NASA scientist define cometary wimpiness?

"We're talking about how a comet looks as it safely flies past us," said Yeomans. "Some cometary visitors arriving from beyond the planetary region – like Hale-Bopp in 1997 -- have really lit up the night sky where you can see them easily with the naked eye as they safely transit the inner-solar system. But Elenin is trending toward the other end of the spectrum. You'll probably need a good pair of binoculars, clear skies, and a dark, secluded location to see it even on its brightest night."

Comet Elenin should be at its brightest shortly before the time of its closest approach to Earth on Oct. 16 of this year. At its closest point, it will be 35 million kilometers (22 million miles) from us. Can this icy interloper influence us from where it is, or where it will be in the future? What about this celestial object inspiring some shifting of the tides or even tectonic plates here on Earth? There have been some incorrect Internet speculations that external forces could cause comet Elenin to come closer.

"Comet Elenin will not encounter any dark bodies that could perturb its orbit, nor will it influence us in any way here on Earth," said Yeomans. "It will get no closer to Earth than 35 million kilometers [about 22 million miles]. "

"Comet Elenin will not only be far away, it is also on the small side for comets," said Yeomans. "And comets are not the most densely-packed objects out there. They usually have the density of something akin to loosely packed icy dirt.

"So you've got a modest-sized icy dirtball that is getting no closer than 35 million kilometers," said Yeomans. "It will have an immeasurably miniscule influence on our planet. By comparison, my subcompact automobile exerts a greater influence on the ocean's tides than comet Elenin ever will."

Yeomans did have one final thought on comet Elenin.

"This comet may not put on a great show. Just as certainly, it will not cause any disruptions here on Earth. But there is a cause to marvel," said Yeomans. "This intrepid little traveler will offer astronomers a chance to study a relatively young comet that came here from well beyond our solar system's planetary region. After a short while, it will be headed back out again, and we will not see or hear from Elenin for thousands of years. That's pretty cool."

NASA detects, tracks and characterizes asteroids and comets passing relatively close to Earth using both ground- and space-based telescopes. The Near-Earth Object Observations Program, commonly called "Spaceguard," discovers these objects, characterizes a subset of them, and predicts their paths to determine if any could be potentially hazardous to our planet.

JPL manages the Near-Earth Object Program Office for NASA's Science Mission Directorate in Washington, DC. JPL is a division of the California Institute of Technology in Pasadena.

More information about asteroids and near-Earth objects is at: http://www.jpl.nasa.gov/asteroidwatch , and on Twitter: @asteroidwatch .

DC Agle (818) 393-9011
Jet Propulsion Laboratory, Pasadena, Calif.
agle@jpl.nasa.gov


Trajectory of comet Elenin. Image credit: NASA/JPL-Caltech