[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

These images were all taken with the same telescope, camera, and  image-scale, and show the expansion of the Holmes coma over the last  3 weeks.
The camera orientation changes because in the last two because I  thought it better to align the long dimension of the frame  approximately NS, rather than approximately EW, in order to get more  length of coma in.

These are images I sent out yesterday, but Mark Crossley on the UK  Astro-Imaging forum has now made them into this rather nice collage,  combining them in their correct positions against a background  generated
from Skymap Pro, so I though I would share it.

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

久しぶりに観望できました。
月の昇る直前でしたが、肉眼でも十分に見えました。
コマはさらに拡大しており、135mm+DMK21AF04 の組み合わせでもいっぱいいっぱ
いになってきました

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

2007/11/29 12:18-12:34(UT)
FC100(D:100mm fl:800mm)+pentaprism+LV20mm+Nikon CoolPix995(ISO:400 NR:on fl:8.2mm) fl:330mm
exp.:30sec.*8frames sataked
comment:
月明かりの影響が少ないとまだ立派な見え方です。

≪広島市　中井健二≫

 The comet was quite difficult to see with the naked eye.
Through the  10x70
binoculars, it looked like a small patchy cloud slightly smaller than the  full moon.
I imaged Comet Holmes and then the full moon. I  compare with both objects
side by side. You can see the comet is  nearly the same size of the full moon.
So, I would say the coma is probably the  size of 30' - 35' arcmins in
diameter. Of course, from the darker sky, perhaps  it is a bit larger and surrounded
by the halo.

[Frank J Melillo  Holtsville NY U.S.A]

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

2007/11/23 12:19-12:20(UT)
FC100(D:100mm fl:800mm)+pentaprism+LV20mm+Nikon CoolPix995
ISO:400 NR:on fl:330mm
exp.:20sec.X1 30sec.X1 2frames staked
comment:
The black bristletail of the screen is caused by the camera.
It was troubled for the moonlight in age of the moon 13.5 and the comet to be light terribly and to find.

画面の黒いシミはカメラに起因するものです。
月齢13.5の月明かりと彗星が凄く淡くて見つけるのに苦労しました。

≪広島市　中井健二≫

2007/11/21 10:54-11:02(UT)
FC100+pentaprism+LV20mm+Nikon CoolPix995(ISO:400 NR:on fl:8.2mm) fl:330mm
exp.:31sec.X5 46sec.X1 6frames stacked
comment:
月齢11.5の月が近くにある。

≪広島市　中井健二≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

2007/11/17 12:39-12:48(UT)
FC100(D:100mm,fl:800mm)+EOS Kiss Digital
ISO:800 NR:non
exp.:30sec.X12
comment:
広島市の光害の中。上弦の月が南西にある。
30秒露出を12フレーム加算平均。
コマの視直径は眼視では32−33分。


≪広島市　中井健二≫

[Frank J Melillo  Holtsville NY U.S.A]

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

-Date: 14-11-2007
-Time: 22.30 UT
-Telescope: 70mm F/7.1 achromatic refractor
-Camera: SXV H-9 (L20.5'--R6.5'-G6.5'-B6.5')
-Location: Athens ''ZHN'' observatory

[Kolovos Dimitrios ,  Athens Greece]
《コロボス　デミトゥリオス  ギリシャ アテネ》

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

2007/11/12 14:58-15:00 (UT)
160mm Newtonian (F4.8)on Redusar
Nikon-D50　ISO:800
exp.:40sec.X4 25%Resize
on Kokubunji,Yokyo,Japan


Junichi Nakamura (Tokyo,Japan)
≪東京都　国分寺市　中村淳一≫

2007/11/12 21:39-21:51
FC100(100mm Referector)+EOS Kiss Dital(non NR)
fl:800mm
exp.:60sec.X8frames staked
comment:
コマの南側に淡い光芒が広がっている。


≪広島市　中井健二≫

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

It has certainly changed a lot since we first saw it,when it was easily
imageable with a DSLR in a light-polluted sky. The diffuse state now means it
needs quite long exposures. My DSLR shots are no longer very successful: here is
a mono CCD image,to same scale as previous sets with this equipment. On the
other hand,it does look like a proper comet to the naked eye now.


[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

2007/11/09 21:29-21:37
FC100+pentaprism+LV20mm+Nikon CoolPix995(ISO:400 NR:on fl:8.2mm) fl:330mm
exp.:31sec.X4,60sec.X1 5frames stacked
tarns.:1/10
comment:
薄雲を通しての撮影。核からジェットが出て紡錘状になっている。

≪広島市　中井健二≫

≪広島市　中井健二≫

2007/11/07 21:08-21:14
LX200GPS-25(254mm Schmidt Cassegrain f/10)
pentaprism+LV20mm+Nikon CoolPix995(ISO:400 NR:on fl:8.2mm) fl:1200mm
exp.:31sec.X5frames stacked
trans.:2-3/10
comment:
このシステムでは視野いっぱいに広がり限界。
視直径は20分＋α
4フレームを加算平均したものに1フレームをさらに加算平均して、トーンカーブ・レベル調整



≪広島市　中井健二≫

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

2007/11/02 21:43-21:47(JST) 4frames staked
LX200GPS-25(254mm Schmidt Cassegrain f/10)
pentaprism+LV20mm+Nikon CoolPix995(fl:8.2mm)
fl:1200mm ISO:400 NR:on
exp.:20sec.X4
comment:
原画では核からジェットのような光のスジが見えるが、加算平均すると消えてしまいそう。
南西の輪郭がボケている。尾が伸びているのだろうか？


≪広島市　中井健二≫

  COMET 17P/HOLMES DATE: Nov 01
23:35-01:04UT
230X01.83SEC/140X02.83SEX EXP)
COND:CLEAR/STEADY)
10IN NEWTON/ATK-1HS-11/f/4.8)


[バンディバ:オランダ]
[Ralf Vandebergh:Neighbourhood of Maastricht Netherlands]

This is something of a negative result,but maybe interesting. My idea was to
over-expose the comet for a long time in order to record a faint tail,if
present,beyond the outer coma. An image by Pete Lawrence suggested there should
be one. My conditions are,however,not well suited to such an experiment,being
very light-polluted. I used an Astronomik CLS (City Light Suppressant) filter on
an 80mm f5 telescope.

Despite exposing for 144 minutes,and doing an aggressive contrast stretch on
the stack,there is no evidence of a tail. The outer coma is slightly
asymmetrical,the isophotes bulging in the same direction as the inner coma is
seen to "blur",but there are no tail streaks as Pete was able to record (with
much shorter exposure) on the 29th. Has the CLS filter suppressed them,I
wonder,or have they gone?


[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[Nick James: United Kingdom]

27日と比較すると2倍の大きさに広がっています。
また、南西方向がボケてきた感じです。

≪神奈川県横浜市　米山誠一≫

≪神奈川県横浜市　米山誠一≫

Here is an even more detailed view of the structure of the central coma than I did last night,
this time with a C-14 plus focal reducer to bring it to an EFL of about 100 inches,about twice that used last night.
Again,the image is presented before and after sharpening.
Carefully-laid plans to do a really long exposure with a short focal length were scuppered on occasions both before and after
midnight by moving cloud,though there was a lot of clear sky about.

[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

     I'm happy to read some of the visual reports of  Comet Holmes. Some of
have taken great images! Keep up with your good work!!

I have posted my latest image. The coma had grown to  nearly 10' arc minutes
across. So,I took 4 mosaic photos,attached them  together and reduced to 75%
on the scale. WOW It is a beauty!  Otherwise,it wouldn't fit anymore in a
single frame.


[Frank J Melillo  Holtsville NY U.S.A]

DATE: OCT 31,2007
01:02-01:05UT
_________________
62X2.84SEC ATK-1HS/10IN NEWTON/f4.8'

COND:misty/moonlight/steady)
__________________________
NOTES:
streamers off the CC at p~45/
darker area at p~270).
large HALO/outer coma with
rare sharp border,incredible
sign visually)


[バンディバ:オランダ]
[Ralf Vandebergh:Neighbourhood of Maastricht Netherlands]

Comet Holmes 17P - Taken at 23:00 (Flackwell Heath - High Wycombe - UK)
Had cloud up until 10pm and then it just got better,either last night
was a lot more
Stable or im sure the comet has got brighter,around midnight it was
very easy to spot
Compared to the previous night.


[James Jefferson: United Kingdom]

2007/10/30 22:21-22:24 3frames staked
LX200GPS-25+pentaprism+LV20mm+Nikon CoolPix995(fl:8.2mm)ISO400 NR on
fl:1200mm
exp.:20sec.X3
comment:眼視では視直径10分くらい。南西の輪郭がボケている。

≪広島市　中井健二≫

Have only seen 3 comets in my time and this is indeed an excellent
example of something different.
Had a hard job of getting the settings and exposures right, will have
another go tonight.
Getting the gain right is the hardest job, this was a stack of 20
exposures at 12secs, gain low.

Still amazing night time object.


[James Jefferson: United Kingdom]

The excitement continues.

Here I have taken a close-up,fairly fast-frame rate sequence with a Lumenera
and a fast telescope (f4.8).

After stacking and sharpening,the jet structure first imaged,I think,by
Lazzarotti,is clear.


[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

    The sky condition was fair with some high clouds but I  decided not to
take any images tonight. I did see the comet through the 10x70  binoculars and
it seems that the coma grew a bit larger yet.

I have posted the images from Sunday night. The coma  itself grew larger
since Saturday nite. It nearly fill the whole frame! Also,there is a small
jet or stream from the nucleus. I used high pass/low power to  sharpen the
details around the nucleus.

Finally,I made a two night animation and you  really see the difference.




[Frank J Melillo  Holtsville NY U.S.A]

At last,after four days of continuous cloud and rain since the discovery of the
outburst by Santana,a clear night here in Edgware allowed me to see this
amazing object. It is unlike any comet I have seen before,though it reminds me
of the drawing of the fission of Biela's comet of 1846,the circular part.

The darker region within the remarkably sharp outer coma suggests a shell of
material has been ejected,planetary nebula-like,symmetrically at the outburst.
This character was also clear visually when I examined it through a Celestron
14. The nucleus is almost centred in this outer coma,but the inner coma is very
asymmetric about the nucleus.

The comet is so bright it is very easy to image. This 1 minute exposure with an
ordinary DSLR was tracked at siderial rate,using a 100mm refractor on an
Astro-Physics 1200 mount.





[David Arditti: Edgware Middlesex HA8 5LW: United Kingdom]

[Ian Sharp: West Sussex, United Kingdom]

Attached are a sequence that I have taken which shows the expansion
quite well. At this rate it will exceed my telescope field of view very
soon...

I'm giving a short presentation on this comet to the BAA meeting on
Wednesday night. I'm assuming that it is OK to use your images but if it
isn't please let me know!


[Nick James: United Kingdom]

２５日に見て以来３日たっていましたが、光度は衰えていませんでした。
手元にあった  Vixen　Cマウント  レデューサー  を使い、３０ｃｍF３として
DBKで撮影してみました。
筒外焦点距離が短く、適当なカメラアダプターが無いため、手でカメラを接眼部
に押しつけながらの
無謀な撮影となりました。
ダストの外周リングや核から吹き出るジェット？、及び核近傍のダストの濃淡が
わかります。


[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫

[Paolo R. Lazzarotti : Massa-City,Italy]

眼視のイメージ


少し強調


さらに強調

Use is free.
利用自由
[T.Ikemura Nagoya Aichi JAPAN]
 ≪愛知県名古屋市　池村俊彦≫

　ホームズ彗星は、今まで見た中でも特異な彗星でした。
１０月２５日には望遠鏡で見ると
惑星状星雲のような姿でしたが、２７日、２８日と日を追う毎にコマが広がっています。
昨晩、今晩と天候が悪くて見ていませんが、もう少し大きな姿を見ることができるのでは
と思っています。月光の影響も無くなるので期待しているところです。
撮影機材
310mm　Newtonian F6.5 レデューサ装着し、F5
CANON EOS Kiss Digital X
ISO=400 露出：13秒（10/27)　15秒（10/28)


[Ayauta-gun Kagawa-Prefecture Japan]
≪香川県　綾歌郡　瀧本郁夫≫

≪三重県熊野市　畑中明利≫

40ｃｍ  の再研磨が終り、一昨日届いたばかりで
早速組み立てて、晴れたので撮しました。
明るいので、F15直焦点で15秒で写りました。

≪三重県熊野市　畑中明利≫

≪神奈川県横浜市　米山誠一≫

≪神奈川県横浜市　米山誠一≫

１９時のNHKニュースで知り、早速観測してみました。
こんな形状の彗星は、これまで見たことがありません。
DMKとDBKで撮影し、LRGB処理してみました。
実際の色合いはもっと橙色がかっています。


[Hideo Einaga Kasai-City Hyogo-Prefecture Japan]
≪兵庫県　加西　永長英夫≫