Ngc6231

[TrevorW]

Target: NGC 6231
Camera: QHY 8 OSC uv/ir nose piece
Exposure Capture: Maxim
Scope: GSO 8” RC
Mount: EQ6 Pro
Exposure Setting: Gain 2 offset 109
Exposures: 13 x 360s total 78m taken 9/05/10
Seeing: good no moon
Guiding: Orion Starshoot Autoguider using PHD
Focus: Maxim, and mask
Stacking: DSS 3darks, 10flats, 10 bias frames
Processing: PS CS3, Maxim DL.

Note: I previously did this in ealy April per link below but the framing and data collected this time around are better I think

http://www.iceinspace.com.au/forum/a...se.php?a=74856

Right Ascension 16 : 54.0 (h:m)
Declination -41 : 48 (deg:m)
Distance 5.9 (kly)
Visual Brightness 2.6 (mag)
Apparent Dimension 15 (arc min)

Info: Situated in the Scorpius
NGC 6231 is an open cluster located near Zeta Scorpii. Zeta 1 (HR 6262) is a member of this star cluster. (Its brighter apparent partner, Zeta 2 (HR 6271), is only 150 ly from Earth and so is not a cluster member.) This cluster is estimated about 3.2 million years old, and is approaching the Solar System at 22 km/s. Very young stars including it, belong to the Scorpius OB association. Zeta1 Scorpii (spectral type O8 and magnitude 4.71.) is the hottest star in it. It was discovered by Giovanni Batista Hodierna before 1654. Hodierna listed it as Luminosae in his catalogue of deep sky observations. This catalogue was included in his book De Admirandis Coeli Characteribuse published in 1654 at Palermo. It was independently observed by other astronomers after Hodierna

[desler]

Yes trevor, better data makes for nice images. Nicely done!


Darren

[renormalised (Carl)]

Nice shot, Trevor. Stars look good

[TrevorW]

Thanks Darren and Carl

longer subs would be the go to get more stars

[Hagar (Doug)]

Nice image Trevor, It is quite an improvement on the original image.

Well done.

[multiweb (Marc)]

Top shot Trev I'll go against the flow on this one though. I know you're going for more subs and more stars but I liked the soft tones on the first rendition. Just harsher processing on this one. But hey that's me.

[rogerg (Roger)]

I'm going with Marc, I prefer the softer processing of the other one however, this one does have rounder stars.

anyhow, nice cluster of stars

[TrevorW]

Thanks Marc and Roger on reflection you are right as I psuhed the processing on this one due to a reflection appearing so I reposted another version to my pbase site (under open clsuters) hope thats better

Cheers