Petri Kehusmaa Astroblog » Nebulae http://www.kehusmaa-astro.com All pictures Copyright by Petri Kehusmaa Thu, 08 Jul 2010 12:21:58 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 More data for M16 http://www.kehusmaa-astro.com/2010/07/08/more-data-for-m16 http://www.kehusmaa-astro.com/2010/07/08/more-data-for-m16#comments Thu, 08 Jul 2010 12:21:35 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=183 We shot some more RGB frames for M16 with NG Telescope. Now the total exposure time for LRGB is 215 minutes.

M16-LRGB-scaled-v2.1.4
]]> http://www.kehusmaa-astro.com/2010/07/08/more-data-for-m16/feed 0 M17 Swan Nebula with NG Telescope http://www.kehusmaa-astro.com/2010/06/27/m17-swan-nebula-with-ng-telescope http://www.kehusmaa-astro.com/2010/06/27/m17-swan-nebula-with-ng-telescope#comments Sun, 27 Jun 2010 07:37:49 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=181 Latest image from Australia is M17 alias Swan Nebula. This is a narrowband image taken with Ha, OIII and SII filters. Exopsures are Ha:OIII:SII=120:20:40. Ha was also used as luminance layer in Photoshop.

M17 Narrowband with HST palette
]]> http://www.kehusmaa-astro.com/2010/06/27/m17-swan-nebula-with-ng-telescope/feed 0 M8 Lagoon Nebula with NG Telescope http://www.kehusmaa-astro.com/2010/06/16/m8-lagoon-nebula-with-ng-telescope http://www.kehusmaa-astro.com/2010/06/16/m8-lagoon-nebula-with-ng-telescope#comments Wed, 16 Jun 2010 13:35:22 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=178 RGB image of this great looking nebula. Exposures RGB=25:15:20 minutes only!

M8
]]> http://www.kehusmaa-astro.com/2010/06/16/m8-lagoon-nebula-with-ng-telescope/feed 0 M20 with NG Telescope and Extra Data http://www.kehusmaa-astro.com/2010/06/15/m20-with-ng-telescope-and-extra-data http://www.kehusmaa-astro.com/2010/06/15/m20-with-ng-telescope-and-extra-data#comments Tue, 15 Jun 2010 14:07:10 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=175 Me and J-P Metsävainio were able to get some more images for this nebula. Here is updated version with new data added.

M20
]]> http://www.kehusmaa-astro.com/2010/06/15/m20-with-ng-telescope-and-extra-data/feed 0 M16 with NG Telescope http://www.kehusmaa-astro.com/2010/05/20/m16-with-ng-telescope http://www.kehusmaa-astro.com/2010/05/20/m16-with-ng-telescope#comments Thu, 20 May 2010 19:16:44 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=167 This is v0.1 of this beautiful nebula. Mora data needs to be acquired.

Acquired with NG Telescope (operated by Bert Candusio)
Images: J-P Metsävainio / Petri Kehusmaa
Processing: Petri Kehusmaa

M16-HaOIIILRGB
]]> http://www.kehusmaa-astro.com/2010/05/20/m16-with-ng-telescope/feed 0 M20 with 16″ RCOS NG Telescope http://www.kehusmaa-astro.com/2010/05/20/m20-with-16-rcos-ng-telescope http://www.kehusmaa-astro.com/2010/05/20/m20-with-16-rcos-ng-telescope#comments Thu, 20 May 2010 19:10:49 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=164 Today I was able to continue using this magical telescope in Australia. Scope was operated by Bert Candusio locally and I used the control computer with VNC.

Image data by J-P Metsävainio and Petri Kehusmaa.

Image processing by Petri Kehusmaa

M20LRGBv3
]]> http://www.kehusmaa-astro.com/2010/05/20/m20-with-16-rcos-ng-telescope/feed 0 M42 Revisited http://www.kehusmaa-astro.com/2009/12/09/m42-revisited http://www.kehusmaa-astro.com/2009/12/09/m42-revisited#comments Wed, 09 Dec 2009 06:19:39 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/?p=150 I’m going through my old images and reprocessing them with new tricks I’ve learned after watching Adam Block’s DVD. Here is M42 from last year.

M42 Revisited
]]> http://www.kehusmaa-astro.com/2009/12/09/m42-revisited/feed 0 M16 http://www.kehusmaa-astro.com/2008/08/03/m16 http://www.kehusmaa-astro.com/2008/08/03/m16#comments Sun, 03 Aug 2008 16:44:46 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/2008/08/03/m16 M16

This nebula is very hard to image at these latitudes where it rise only about 15 degrees above horizon and summer night skies are still very pale. Anyway, I gave it a try and somehow succeeded to have even colors. The blue channel images were almost unusable but I managed to get something out of them. Imaged with 8″ SCT and STL-11000. Total exposure 160 minutes.

]]> http://www.kehusmaa-astro.com/2008/08/03/m16/feed 0 Final M42 from Season 2007-2008 http://www.kehusmaa-astro.com/2008/07/02/m42-from-season-2007-2008 http://www.kehusmaa-astro.com/2008/07/02/m42-from-season-2007-2008#comments Wed, 02 Jul 2008 13:55:56 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/2008/07/02/m42-from-season-2007-2008 I combined my latest image with earlier M42 image and was able to get total of 3.5 hours of exposure. This is the result and will be my final for season 2007-2008. Next time I will return to this on November.

* WPG2 CANNOT LOCATE GALLERY2 ITEM ID 497 *

]]> http://www.kehusmaa-astro.com/2008/07/02/m42-from-season-2007-2008/feed 0 M42 sub exposures from January http://www.kehusmaa-astro.com/2008/07/01/m42-sub-exposures-from-january http://www.kehusmaa-astro.com/2008/07/01/m42-sub-exposures-from-january#comments Tue, 01 Jul 2008 12:47:55 +0000 Petri Kehusmaa http://www.kehusmaa-astro.com/2008/07/01/m42-sub-exposures-from-january Rainy days might be rewarding after all. I had some time to browse through my image directories and found 1 minute sub exposures taken on January. I put them together (HaRGB) and here is the result. Total exposure time is 50 minutes. More details in my image gallery (click image).

M42
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