Ищем кометы!

[Игорь]

http://spaceweathergallery.com/full_image.php?image_name=waldemar-skorupa-ISON_2013-11-16T05h09m_3x180s_1x120RGB_skorupa_1384606267.jpg

"A picture from spaceweather taken today 11/16." 

Прислали ссылку по эл. почте.

[Игорь]

И вот в черно-белом варианте  http://spaceweathergallery.com/indiv_upload.php?upload_id=89744&PHPSESSID=pm9gcltd2duplanqpb4nspnvi7

[Odissey]

Марк Твен наблюдал два возвращения кометы Галлея.
------------------------------------------------------------
Первый раз из окна роддома , а второй в год ухода в Лучший мир

[LeonidOS]

Вышел очередной CBET по комете ISON.

Вкратце, в нем говорится что что замеченная авторами (ну и не только ими) "дуга" перед кометой, может быть интерпретирована как распад ядра на 2 или более части... А крупные телескопы ее уже не достанут, как и тот же Хаббл...


                                                  Electronic Telegram No. 3715
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


COMET C/2012 S1 (ISON)
     H. Boehnhardt, C. Tubiana, N. Oklay, and J. B. Vincent, Max Planck
Institute for Solar System Research, Katlenburg-Lindau; and U. Hopp, C. Ries,
M. Schmidt, A. Riffeser, and C. Goessl, Astronomical Institute, Ludwig
Maximilian University, Munich, report the detection of coma wings in Laplace-
filter-processed CCD exposures of comet C/2012 S1 obtained with the 0.4-m
telescope of the Mt. Wendelstein Observatory on Nov. 14.16-14.21 and
16.16-16.21 UT.  The arclet-like wings appeared in opposite direction from
the nucleus at position angles 15 and 195 deg on Nov. 14 and at p.a. 25 and
205 deg on Nov. 16.  The coma wings extended straight from the nucleus for
about 4700 km on Nov. 14 and 13500 km on Nov. 16 on either side of the
extended radius vector and continued in streamers of the plasma tail.  No
coma wings were found in similar exposures obtained on Nov. 13.  The coma
wings suggest the presence of two or more sub-nuclei with individual
expanding atmospheres in the overall cometary coma and may indicate recent
nucleus splitting in the comet.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

[Игорь]

Посмотрим сегодняшние оценки, но похоже что блеск встал, по крайней мере о росте блеска на величину в сутки речи уже не идет. Вполне возможно что вспышка была вызвана разделением ядра кометы с лавинообразным освобождением огромных запасов летучих веществ из внутренних каверн ядра. А дуга это их резкое торможение солнечным ветром.

[Игорь]

http://groups.yahoo.com/neo/groups/Comet-Images/conversations/topics/10887

Ison Nov. 16 LRGB (2)

Hello

A LRGB image from this morning showed after outburst a deep blue outer coma.
I was surprised that the coma was smaller in the green channe

http://cometpieces-at.webnode.at/#a2012s120131117lrgblastweb-jpg

Best Regars
Michael Jäger

[Игорь]

Якуб Черный, так же пишет о том, что такая форма может быть следствием кратковременного, мощного выброса газа и пыли. Подобное наблюдалось у кометы Лавджоя (C/2011 W3), в момент начала распада ее ядра. В случае Лавджоя после этого события, блеск кометы падал на 1-2 величины в сутки. Будем следить...

[Игорь]

C/2010 X1 (Elenin)         P/2011 NO1 (Elenin)
C/2012 S1 (ISON)          P/2011 R3 (Novichonok-Gerke)
C/2013 N4 (Borisov)         P/2013 V3 (Nevski)
C/2013 V2 (Borisov)

Это кометы России и Украины. Слева долгопериодические, справа - короткопериодические.
Жирным выделены кометы сети ISON.

[Игорь]

http://www.isoncampaign.org/karl/ison-final-countdown

Comet ISON Enters the Final Countdown

We’re now less than two weeks away from comet C/2012 S1 (ISON) reaching perihelion and, if we’re honest, we are still none the wiser as to how the situation might play out!

Last week, the CIOC’s Matthew Knight wrote an excellent blog post detailing the three possible outcomes for ISON in the coming days: imminent disintegration, disintegration at perihelion, or survival. Since he wrote that, and indeed in just the past 24-hours or so, comet ISON has undergone a dramatic shift in nature, with a brightness increase of at least an order or two of magnitude, and soaring rates of dust and gas being released from its nucleus. In light of this new development, we can now say with absolute certainty that comet ISON will definitely do one of those things that Matthew said it might do…

OK, that was vague. But the truth is, although this new development is tremendously exciting, it still doesn’t help us answer either of the questions that everyone wants to know: namely, how bright will comet ISON be, and will it survive perihelion?

The problem is that we don’t yet know why ISON has so suddenly and dramatically changed in brightness and production rates.

It could simply be that ISON has realized it’s a near-Sun comet (soon to be a sungrazer) and is beginning to “turn on” accordingly. After all, if it is to reach the lofty brightness goal of magnitude -3 to -5 that we long predicted (OK, guessed) that it might, then it has a lot of work to do in the next two weeks! This is actually a very likely scenario, and if true means that the first of Matthew’s scenarios – imminent disintegration – will not be the case.

But this requires the comet’s nucleus to remain in tact, and this brings us nicely to the second possibility: comet ISON’s nucleus has fragmented. We always said this could happen, and it perhaps has. If so, it will still be several days before we know for sure. When comet nuclei fall apart, it’s not like a shrapnel-laden explosion; the chunks simply drift apart from one-another at slightly different speeds. Given that ISON’s nucleus is shrouded in such a tremendous volume of light-scattering dust and gas right now, it will be almost impossible to determine this for at least a few days and perhaps not until the comet reaches the field of view of the NASA STEREO HI-1A instrument on November 21, 2013. We will have to wait for the chunks to drift apart a sufficient distance, assuming they don't crumble first.

If ISON’s nucleus has fragmented, the chances of any substantial chunk of nucleus surviving the extreme close brush with the Sun on November 28 are really quite small – but still not impossible. And even if ISON’s nucleus does fall apart completely, Matthew painted us a promising picture in his second scenario with a comet that still graces our December night skies with an extensive and beautiful tail.

So even in the face of adversity and the unknown, there is still hope that we will see a vivid naked-eye comet in the night skies in Northern Hemisphere. And even if not, we have already obtained unprecedented scientific knowledge of this comet with data from ten different spacecraft to date, and a vast wealth of ground-based observations from professional and amateur astronomers. In this sense, cometary science has already won. It just remains to be seen how big that win will be.

Follow us on the CIOC website through perihelion week as Matthew and I will be feverishly working, analyzing, blogging and tweeting as much as possible from atop Kitt Peak in Arizona.

This image, taken by Juanjo González Díaz on November 14, 2013, shows clearly some of the beautiful structures that have suddenly appeared in comet ISON's tail. Is this the beginning of a spectacular show, or the beginning of the end for comet ISON?

[LeonidOS]

Похоже что часть хвоста оторвалась. Хорошо видна дуга, уже без какой либо обработки.

[Игорь]

http://www.astronews.ru/cgi-bin/mng.cgi?page=news&news=4953

Комета Исон видна невооруженным глазом

Звездное шоу начинается. Согласно сообщениям множества обозревателей, комета Исон (ISON) теперь видна невооруженным глазом. Так называемая «комета столетия» до сих пор считалась скорее «разочарованием столетия», - но внезапная вспышка активности за две недели до прохождения перигелия значительно повысила ее яркость.

Яркость объекта в ночном небе измеряется в величинах: чем ниже порядок величины, тем выше яркость объекта. Наименьшая яркость объекта, которую может уловить человеческий глаз, равна +6,5.

В понедельник, согласно известному наблюдателю за кометами, Джон Бортлу (John Bortle), яркость кометы Исон составляла +8,5 – она была более чем в 6 раз менее яркой для того, чтобы ее можно было увидеть невооруженным глазом. Однако в среду утром яркость кометы неожиданно возросла до +7,3. Но еще больший сюрприз ждал Бортла утром в четверг.

"В 4:45 утра я уже собирался уходить, как вдруг мое внимание привлекла необычная пятнистая звезда. Я вначале подумал, что у меня что-то со зрением. Но нет, «пятнистая звезда» на самом деле находилась на месте кометы! По пути к месту назначения яркость кометы вдруг подскочила до 5.4 – она стала на целых две величины ярче, чем 24 часа назад! А с понедельника ее яркость выросла на три величины!"

Всего за 72 часа яркость кометы Исон выросла в 16 раз.

Наблюдения Бортла подтверждает Карл Хергенротер (Carl Hergenrother), действующий координатор отдела комет Ассоциации Наблюдателей за Луной и Планетами.

"За последние несколько дней яркость Исон значительно вырола. По последним данным, она сейчас держится на уровне от 5.7 до 6.1. Я сам наблюдал ее сегодня утром в бинокли 10x50 и 30x125, и увидел симпатичный «леденец» с очень конденсированной сине-зеленой комой и длинным, узким хвостом. Длина хвоста была около 1 градуса, даже в 10x50. Вероятно, яркость будет увеличиваться, так как вспышка кометы сейчас находится на начальной стадии".

Наблюдатель из Лонг-Айленда Деннис Уайлд (Dennis Wilde) так же впечатлен: "Исон, хотя и не такого размера, как полная Луна, - очень впечатляющее зрелище. Ее кома была компактной с очень заметным ядром необыкновенно яркого зеленого цвета. Рядом с комой хвост был узким и ярким, и слегка расширялся – почти до 3,5 градусов – к концу. Я наблюдал за комой в бинокль с увеличением в 490 раз и она была очень плотной и яркой. Нет никаких признаков того, что начинается распад".

[Игорь]

"Крылья", более детально.

Обработка Larson-Sekanina + ложные цвета для максимального выделения крыльев.
Красные "штрихи" это конечно не обломки кометы, а звезды фона.

Жар-птица  

http://www.zagadochnaya-sila.ru/persons/199-slavyan/584-zhar-ptica.html

[Игорь]

Заметка в Индии:

http://articles.timesofindia.indiatimes.com/2013-10-02/pune/42614621_1_international-scientific-optical-network-mass-campaign-workshops

Sky-watchers gear up for International Scientific Optical Network comet

PUNE: The Maharashtra leg of the national campaign on comet International Scientific Optical Network (ISON) started on Tuesday with a workshop for science communicators at the SM Joshi Hall.

Demonstrations of simple experiments in astronomy, sessions on how to observe the comet in the early morning sky and lectures were held during this day-long workshop.

The campaign titled 'Eyes on ISON' is being coordinated in the city by a number of popular science groups, astronomy clubs, reputed institutions like the Inter-university Centre for Astronomy and Astrophysics among others.

The campaign is mainly a consortium of astrophysicists, amateur astronomers, science activists and artist-designers who have come together for a mass campaign on the comet's trail. It includes generating open-source digital resource material, conducting country-wide workshops and plans to work towards incorporating learning science in schools.

Niraj Ramanujam of the National Centre for Radio Astrophysics (NCRA) said, "Eyes on ISON is a nation-wide campaign on the comet which is expected to be visible to the naked eye in the morning sky an hour before dawn from October-end to January-end 2014. Scientists do not know yet how bright it will be, but some predict that it will become very bright, with a long tail."

The national campaign aims to reach out to 15 to 20 million school students across the country. Resource material on the campaign is also available on www.eyesoncometison.in. has also been prepared with contents of the workshops, demonstrations and information on the comet. the re-source material has also been made available for free access on a dedicated website for the campaign, which is www.eyesoncometison.in.

Ramanujam said, "Following this workshop, the participants will be organising workshops in schools and public spaces in their respective districts. These district workshops will lead to public events on the ground, in schools and other public places which include

Astronomy festivals, sky watching camps, poster exhibitions are some of the things planned."

For the Maharashtra leg of this campaign, the organisers have prepared the resource material in Marathi. The two-day workshop will end on Wednesday with a public event where eminent astrophysicist Jayant Narlikar will speak on the topic - an experiment test of astrology, followed by a panel discussion and a question-answer session. It will be held at the College of Engineering, Pune auditorium between 5 and 7pm.

[Игорь]

Еще июльская заметка на сайте НАСА с расписанием движения кометы ИСОН (есть видеоролик):

http://www.nasa.gov/content/goddard/timeline-of-comet-ison-s-dangerous-journey/

A Timeline Of Comet ISON’s Dangerous Journey

[Игорь]

Индийская кампания по наблюдению кометы ИСОН:

http://eyesoncometison.in/

Eyes on ISON Campaign, India

Comet ISON is a large Sun-grazing comet whose perihelion will occur on November 29, 2013. This comet is coming into our neighbourhood for the very first time and bears fingerprints of the history of our solar system. While exactly how bright it will get is uncertain, this is nevertheless an exciting opportunity to involve school-going children and the public of India on a massive scale to track the comet.

To this end, a consortium of astrophysicists, amateur astronomers, science activists and artist-designers have come together to catalyse an India-wide mass campaign on the comet’s trail. The activities of the campaign, spanning a period from October to February and beyond, are aimed at sharing the excitement of science with the public, having school children learn science by doing and discovering, and furthering public ownership of science.

The campaign is conducting a country-wide cascading set of training workshops, and working towards incorporating “learning science by doing” into the school curriculum, in the spirit of the Right To Education Act 2009.

The multi-lingual resource material on this website is freely downloadable. An acknowledgement to “Eyes on ISON Campaign, India” will be deeply appreciated.

Comet ISON: Its Name

ISON stands for International Scientific Optical Network, a group of observatories in ten countries who have organized to detect, monitor, and track objects in space. ISON is managed by the Keldysh Institute of Applied Mathematics, part of the Russian Academy of Sciences.

Здесь выложены индийские снимки кометы ИСОН  http://eyesoncometison.in/picsfromindia.html

Images of Comet ISON taken with Hanle Telescope by Margarita Safonova, Indian Institute of Astrophysics