tornado33
23-07-2005, 09:52 PM
Hi all.
With a short time of darkness before moonrise I tried for a new object, He2-111, a planetary nebula that continues the saga of deep southern objects being neglected by astro catalogues. Its is NOT in Uranometria at all. The other thing is that it is so close to Alpha Centauri that if I moved it to one side, I could fit it AND He2-111 in the same field. Its just to the west of Alpha Centauri. Heres the image http://www.users.on.net/~josiah/baader/He2-111cropped.jpg Ironically I had a satellite go through BOTH images (580 sec ISO 400 and 330 ISO 800 with Baader UHCS filter) When I took the first image I thought Id mistakenly imaged the Ant Nebula, as it looks very similar (but not as diffuse), but its in Norma. I cant understand why He2-111 isnt more well known considering its proximity to Alpha centauri, finding it manually was little trouble, with a map printed from Star Atlas Pro http://www.skylab.com.au/ Its far more detailed than my Unarometria Vol 2 (Southern sky) atlas.
Heres another shot of Eta Carina , with the Baader UHCS filter, its a 950 and 860 ISO 800 shot stacked and processed in Photoshop and Noiseware.
http://www.users.on.net/~josiah/baader/Etacarina%202x15iso800baadersmall.j pg It was getting lowish in the SW and rising moon starting to interfere.
I also tried for IC 4628 not expecting too much but was surprised to see it clearly visible in the unprocessed image as shown on the camera LCD, so I took another longer shot at a lower ISO and here it is http://www.users.on.net/~josiah/baader/IC4628baadersmall.jpg
1x 220sec ISO 1600 and 1x 630 sec ISO 800 stacked, processed in Photoshop and Noiseware. The moon was above the horizon by the time Id finished.
Nebula filters have revoloutionalised my astro imaging of emmission nebulae, its the next best thing to having a modified 300D camera. The reds in particular stand out, even in the unprocessed off the camera shots. The important thing with the filters is to treble the exposure times you would normally use, the aim is to get to the sky fog background (Histogram peak about 1/4 to 1/3 way along.)
Scott.
With a short time of darkness before moonrise I tried for a new object, He2-111, a planetary nebula that continues the saga of deep southern objects being neglected by astro catalogues. Its is NOT in Uranometria at all. The other thing is that it is so close to Alpha Centauri that if I moved it to one side, I could fit it AND He2-111 in the same field. Its just to the west of Alpha Centauri. Heres the image http://www.users.on.net/~josiah/baader/He2-111cropped.jpg Ironically I had a satellite go through BOTH images (580 sec ISO 400 and 330 ISO 800 with Baader UHCS filter) When I took the first image I thought Id mistakenly imaged the Ant Nebula, as it looks very similar (but not as diffuse), but its in Norma. I cant understand why He2-111 isnt more well known considering its proximity to Alpha centauri, finding it manually was little trouble, with a map printed from Star Atlas Pro http://www.skylab.com.au/ Its far more detailed than my Unarometria Vol 2 (Southern sky) atlas.
Heres another shot of Eta Carina , with the Baader UHCS filter, its a 950 and 860 ISO 800 shot stacked and processed in Photoshop and Noiseware.
http://www.users.on.net/~josiah/baader/Etacarina%202x15iso800baadersmall.j pg It was getting lowish in the SW and rising moon starting to interfere.
I also tried for IC 4628 not expecting too much but was surprised to see it clearly visible in the unprocessed image as shown on the camera LCD, so I took another longer shot at a lower ISO and here it is http://www.users.on.net/~josiah/baader/IC4628baadersmall.jpg
1x 220sec ISO 1600 and 1x 630 sec ISO 800 stacked, processed in Photoshop and Noiseware. The moon was above the horizon by the time Id finished.
Nebula filters have revoloutionalised my astro imaging of emmission nebulae, its the next best thing to having a modified 300D camera. The reds in particular stand out, even in the unprocessed off the camera shots. The important thing with the filters is to treble the exposure times you would normally use, the aim is to get to the sky fog background (Histogram peak about 1/4 to 1/3 way along.)
Scott.