Общие вопросы астрономии > Новости наблюдательной астрономии
Кентавр с комой!
ctac:
Странно, но почему-то на снимаках с MEADE плоскими полями виньетирование не исправилось, а вот на снимках с малым телескопом все Ок. Странно ???
Ну, по приезду в Москву еще поснимаю ;)
ctac:
2 IAUC с сообщениями о данном кентавре:
COMET P/2000 EC_98 = (60558):
> Circular No. 8656
>
> Central Bureau for Astronomical Telegrams
> INTERNATIONAL ASTRONOMICAL UNION
> Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
> IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
> CBAT@CFA.HARVARD.EDU (science)
> URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
> Phone 617-495-7440/7244/7444 (for emergency use only)
>
> (60558) 2000 EC_98
>
> Y.-J. Choi and P. R. Weissman, Jet Propulsion Laboratory,
> report the detection of a cometary coma on B, V, R, and I images of
> the Centaur object (60558) taken on 2005 Dec. 30.50 UT with the
> Palomar 5-m reflector (+ Large Format Camera); a 600-second R-band
> exposure shows a coma of total mag 17.5 extending about 20" from
> the nuclear condensation. Confirming images of the cometary nature
> were obtained by Choi on 2006 Jan. 1 and by D. Polishook on images
> obtained at Wise Observatory on Jan. 2. The object was discovered
> by Spacewatch (discovery observation below from MPEC 2000-E64 and
> MPS 11487).
>
> 2000 UT R.A. (2000) Decl. Mag.
> Mar. 3.41164 11 10 57.58 + 4 40 25.0 21.0
>
>
2006 January 17 (8660)
> COMET P/2000 EC_98 = (60558)
>
> Further to IAUC 8656, K. Kadota (Ageo, Saitama, Japan, 0.25-m
> reflector) reports a condensed, bright coma of diameter 1' (total
> mag 14.8) and no tail on CCD images taken on Jan. 7.8 UT
> (communicated via S. Nakano). R. Ligustri (Talmassons, Italy,
> 0.35-m reflector) finds an asymmetric coma of size 1'.3 x 0'.9
> extended towards the east in unfiltered CCD images taken on Jan.
> 9.17 UT. G. Sostero and E. Guido (remotely using a 0.25-m
> reflector near Mayhill, NM) report that R_c-band images taken on
> Jan. 10.49 show an uncondensed coma with diameter about 0'.9 and
> total mag 14.1, appearing slight elongated in the north-south
> direction. Visual total-magnitude estimates: Jan. 8.78, 14.4 (S.
> Yoshida, Ibaraki, Japan, 0.40-m reflector); 11.53, 14.4 (A. Hale,
> Cloudcroft, NM, 0.41-m reflector).
>
ched:
174P/ Echeclus = Эхекл
ched:
Неужели это случится? :-\
http://www.aerith.net/comet/catalog/0174P/2000EC98.html
P.S.: Йошида вот что пишет:
--- Цитата: S. Yoshida ---I updated the light curve including the future fading (just my imagination, of course :-)
--- Конец цитаты ---
ctac:
Дима, обрати внимание! В конце письма Йошида сравнивает Кентавра с 29Р, т.к. есть вероятность того, что вспышки имеют такую же периодичность!
Как там доклад? Его надо сделать до 18 марта - это уже дато проведения конференции "Космический патруль", что пройдет во Дворце.
9381
From: Seiichi Yoshida <comet@...>
Date: Thu Mar 2, 2006 5:46pm
Subject: Re: Update about 174P/Echeclus = (60558) = 2000 EC_98
seiichi_yosh...
Offline
Send Email
Dear colleagues,Giovanni Sostero wrote:> you might be interested about the status of the centaur-like object> 174P/Echeclus = (60558) = 2000 EC_98>> The unfilterd CCD photometry performed by us few hours ago, show that> in the position of the object there is a very faint and extended halo> of light, just few counts above the sky background; there isn't any> obvious central condensation. In this conditions is very difficult to> perform any measurement; anyway, assuming a total diameter of almost> 0.7' (or ~370,000 km at the comet distance) for the faint glow of> light, we found an integrated (ulfiltered) CCD magnitude ~15.4. The> equivalent afrho parameter (a proxy of the dust abundance within the> coma) for aperures with radius of ~200,000 km and ~90,000 Km is,> respectively, ~12,000 cm and ~6,400 cm (i.e. almost the same respect> one month ago).Thank you for your valuable observation report!I updated the light curve including the future fading (just myimagination, of course :-)It is encouraged to keep observation and see when it returns to theoriginal brightness.Maybe another outburst will happen in the future. Although it is sofaint as 21 mag after the current outburst ends, someone regularly tryto observe it like 29P? http://www.aerith.net/comet/catalog/0174P/2000EC98.html
Best regards,--Seiichi Yoshid
http://www.aerith.net/
Навигация
Перейти к полной версии