http://www.astromeeting.de/miscellaneous/050315mmarathon.htmhttp://www.astromeeting.de/miscellaneous/050315mmarathon1024.htm독일 천문가가 CCD메시에 마라톤을 했더군요. 108개.
성과도 중요하겠지만 눈길을 끄는 것은 non-GOTO 로 했다는 사실입니다.
Small
http://www.astromeeting.de/miscellaneous/050315mmarathon1024.htm
Large
http://www.astromeeting.de/miscellaneous/050315mmarathon.htm
=================================================
Date: Mon, 28 Mar 2005 16:42:14 -0000
From: "Stefan Seip" <stefan.seip@t-online.de>
Subject: Photographic Messier Marathon
Hi folks.
In the night between March 15 and 16, 2005 I wanted to find out:
How many Messier objects can I manage to image in one single night?
See the result here:
Small (about 370 kilobyte):
http://www.astromeeting.de/miscellaneous/050315mmarathon1024.htm
Large (about 1 megabyte):
http://www.astromeeting.de/miscellaneous/050315mmarathon.htm
All times are UT (Universal Time). You may count 108 objects (The
hole Messier catalog are 110). M30 und M55 are missing, because they
are under the horizon the hole night and they are not observable from
Germany at all at that time of the year.
Stuttgart (Germany), Astro-Physics 155mm F/7 refractor, SBIG STL- 11000 CCD camera, no GOTO-Mount ( ).
I operated the camera in 3x3 binning mode. For the collage I croped
the images more or less, so the image scale is not the same for every
object. The exposure time was at least 60 seconds - up to 6x 60
seconds for critical or beautiful objects, if the timeframe allowed
that. I used no tracking control at all since the mount is able to
track one minute without guiding.
The conditions were everything but fair. The moon and a hazy sky made
my life not easier. I continued with imaging until the faintest star,
which was visible with the naked eye (fst) reaches 3.0 mag. From 1:45
to 2:45 UT the clouds won and I had to interrupt my job. After that
it clears up again and I had to work very hard to catch up the time
I´ve had lost.
I used a red filter for very dim objects near the horizon in the dawn
to increase the image contrast.
Unfortunately I forgot M52 in the evening! After I realized that, it
was too late: M52 was hidden by a house in the north-west direction.
I calculated if and when M52 would be visible for me in the morning
again. And indeed: Between two trees I should be able to grab M52 in
the morning, but only in a time frame of about 10 minutes. At 4:32 UT
I really got it at the right time and the right place.
Summary: A lot of stress and hectic (especially with the weather),
but with a lot of fun too. Particularly in the evening and in the
morning it is a battle with the sinking objects respectively with the
break of dawn.
Assembling the poster is time consumption as well. There are many
different kind of objects, imaged during very different sky
conditions. Therefore I had to process every single image in a
special way.
My recompense is if you enjoy the image. That is what I wish you now.
Stefan
http://www.astromeeting.de
성과도 중요하겠지만 눈길을 끄는 것은 non-GOTO 로 했다는 사실입니다.
Small
http://www.astromeeting.de/miscellaneous/050315mmarathon1024.htm
Large
http://www.astromeeting.de/miscellaneous/050315mmarathon.htm
=================================================
Date: Mon, 28 Mar 2005 16:42:14 -0000
From: "Stefan Seip" <stefan.seip@t-online.de>
Subject: Photographic Messier Marathon
Hi folks.
In the night between March 15 and 16, 2005 I wanted to find out:
How many Messier objects can I manage to image in one single night?
See the result here:
Small (about 370 kilobyte):
http://www.astromeeting.de/miscellaneous/050315mmarathon1024.htm
Large (about 1 megabyte):
http://www.astromeeting.de/miscellaneous/050315mmarathon.htm
All times are UT (Universal Time). You may count 108 objects (The
hole Messier catalog are 110). M30 und M55 are missing, because they
are under the horizon the hole night and they are not observable from
Germany at all at that time of the year.
Stuttgart (Germany), Astro-Physics 155mm F/7 refractor, SBIG STL- 11000 CCD camera, no GOTO-Mount ( ).
I operated the camera in 3x3 binning mode. For the collage I croped
the images more or less, so the image scale is not the same for every
object. The exposure time was at least 60 seconds - up to 6x 60
seconds for critical or beautiful objects, if the timeframe allowed
that. I used no tracking control at all since the mount is able to
track one minute without guiding.
The conditions were everything but fair. The moon and a hazy sky made
my life not easier. I continued with imaging until the faintest star,
which was visible with the naked eye (fst) reaches 3.0 mag. From 1:45
to 2:45 UT the clouds won and I had to interrupt my job. After that
it clears up again and I had to work very hard to catch up the time
I´ve had lost.
I used a red filter for very dim objects near the horizon in the dawn
to increase the image contrast.
Unfortunately I forgot M52 in the evening! After I realized that, it
was too late: M52 was hidden by a house in the north-west direction.
I calculated if and when M52 would be visible for me in the morning
again. And indeed: Between two trees I should be able to grab M52 in
the morning, but only in a time frame of about 10 minutes. At 4:32 UT
I really got it at the right time and the right place.
Summary: A lot of stress and hectic (especially with the weather),
but with a lot of fun too. Particularly in the evening and in the
morning it is a battle with the sinking objects respectively with the
break of dawn.
Assembling the poster is time consumption as well. There are many
different kind of objects, imaged during very different sky
conditions. Therefore I had to process every single image in a
special way.
My recompense is if you enjoy the image. That is what I wish you now.
Stefan
http://www.astromeeting.de
