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5
/ Re: (V=8.9 m) 27 2007 .
« : 15 Ноябрь 2007, 11:19:12 »

6
/ Re: 4- WinOccult
« : 15 Ноябрь 2007, 04:24:59 »

10
/ Re: 17P/Holmes
« : 27 Октябрь 2007, 04:49:12 »
     Date        UT      Diameter   Durn Star Mag  Elon      Star             Alt      R.A. (J2000)  Dec.
  y   m   d    h   m     km   "          mag  drop    o      No.                o    h  m   s      o  '   "

2007 Nov 27   19 37.1    11  0.01   1.1s 11.4  4.9  150  2UCAC 47963226        82   03 14 39.844  49 20 40.66
2007 Dec 17   14 31.9    11  0.01   1.1s 11.6  5.0  141  2UCAC 47384270        50   03  0 14.531  46 25 48.42
2008 Jan 29   23 43.6    11  0.01   0.8s 11.9  5.6  107  2UCAC 45774095        18   03 14 41.881  40 17 17.07
2008 Feb  3   21 33.7    11  0.01   0.7s 10.6  7.0  103  TYC 2852-02237-1u     32   03 19 22.321  39 48 56.93
http://www.poyntsource.com/New/Google2.htm.

11
/ Re: 17P/Holmes
« : 26 Октябрь 2007, 02:29:30 »
J.LecacheuxJ.LecacheuxJ.LecacheuxJ.LecacheuxJ.LecacheuxJ.Lecacheux

13
/ 17P/Holmes
« : 25 Октябрь 2007, 04:31:41 »
http://www.astronomy.ru/forum/index.php/topic,32377.msg584714.html#msg584714http://www.ka-dar.ru/forum/index.php/topic,415.msg10046.html#msg10046
Цитата: J.Lecacheux
The faint comet 17/P HOLMES is currently erupting in Perseus,reaching the magnitude V= 3.0 tonight (compared to magnitude +16 three days ago !)

As seen through a telescope, this is an expanding yellow cloud of dust, about 5" wide (fwhm), or 6000 km, reflecting the sunlight.

It looks like the planet Mars near the solar conjunction, when its diameter has shrinked down to 4", and when the seeing is bad.

Maybe will this dense bowl of dust occult some faint star of the Milky Way soon ?? ...
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Цитата: Dave Herald
I have just run a prediction for this comet, up to the end of Feb next year. There are a number of 11th mag events.... But there are two events involving 9th mag stars, as follows:

Nov 11 6h 30m Hip 16642, 9.6, RA 3 34 8.558, Dec +50 34 59.93
Nov 21 6h 35m Tyc2 3319-1585, 9.8, RA 3 21 57.492, Dec +50 34 59.93

The Nov 11 event passes over northern South America - with the 1" offset to the north crossing Florida and the coast of Texas. From the USA the star will pass within 2" of the nucleus.

The occultation path for the Nov 21 event just touches the Earth in central Asia in daylight. The star will pass about 1" from the nucleus as seen from Alaska, 2" from western Europe (in twilight) and 3" from Canada/USA.

I can proved an Occelmnt file for anyone that wants to view these events.

Dave Herald
Canberra, Australia
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15
/ Re: (V=8.9 m) 27 2007 .
« : 15 Октябрь 2007, 02:18:20 »
[IOTAoccultations] Photometry from John Grismore's record of Pluto appulse
--====----====----====----====----====----====----====----====----====----===--
   
John Grismore wrote a few weeks ago:
 
 > On 9/27/07 I recorded an hour of video of SAO160793 near Pluto's
 > close approach to that star.
 
 John has since posted the light curves of this star
 to the "Photos" section of the IOTAoccultations home page.
 
 John kindly sent me some subsections of his entire video record
 so that I could analyze them independently.  I concentrated on
 just one small section, a clip one minute long (called "clip18"
 on John's DVD).  You can read my report at
 
 http://spiff.rit.edu/richmond/occult/pluto_sep2007/pluto_sep2007.html
 
 My (weak) conclusion is that the measurements during this one short
 clip do not show a real change in the target star's brightness
 due to any sort of occultation.  However, the measurements are
 noisy enough that I can't draw any firm conclusions.  I suspect
 that the rest of the video might be similarly inconclusive ...
 though, again, that's speculation.

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