NGC 6188 and a PN NGC 6164 plus a bit of Dust

[avandonk]

A bit of clear sky at last.

Details
Canon 5DH, Canon 300mm F2.8L at f3.5 with external aperture. ISO 1600. Hutech LPR filter.
Exposures 20x(15s, 30s, 60s and 120s). Usual HDR method. No enhancement. I don't even think the colours are correct as I have been up all night. So any advice gratefully accepted.

Large Image 8MB FoV 7.0 x 4.6 degrees

http://d1355990.i49.quadrahosting.com.au/2010_04/ngc6188.jpg

Anyone know what the very red 'stars' are? See small image two a crop from bottom left.

Bert

[multiweb]

:eyepop: Awesome Bert. I have 4h on two panels in RGB with the ED80 on this one from this Tuesday. I can only hope it comes out as good as this one. :thumbsup::thumbsup::thumbsup:

[DavidU]

Damn nice shot! I would be interested in what those red stars are.

[JD2439975]

Another lovely wide field Bert, despite the sleep deprivation.

As for the red cluster found out it's Westerlund 1.
And ripped from wiki... (NOTE: don't try the hyperlinks, they won't work).

Westerlund 1 (sometimes abbreviated Wd1) is the most massive compact young star cluster (http://www.iceinspace.com.au/wiki/Star_cluster) known in the local group of galaxies (http://www.iceinspace.com.au/wiki/Local_group) and is about 3.5-5 kpc (http://www.iceinspace.com.au/wiki/Kiloparsec) away from Earth. It was discovered by Bengt Westerlund in 1961[1] (http://www.iceinspace.com.au/forum/#cite_note-0) but remained largely unstudied for many years due to high interstellar extinction (http://www.iceinspace.com.au/wiki/Interstellar_extinction) (absorption) in its direction.
The cluster contains a large number of rare, evolved high-mass stars including 6 yellow hypergiants (http://www.iceinspace.com.au/wiki/Yellow_hypergiant), 4 red supergiants (http://www.iceinspace.com.au/wiki/Red_supergiant), 24 Wolf-Rayet stars (http://www.iceinspace.com.au/wiki/Wolf-Rayet_stars), a luminous blue variable (http://www.iceinspace.com.au/wiki/Luminous_blue_variable), many OB supergiants (http://www.iceinspace.com.au/wiki/OB_star) and an unusual sgB[e] star (http://www.iceinspace.com.au/wiki/Be_star) that has been proposed as the remnant of a recent stellar merger[2] (http://www.iceinspace.com.au/forum/#cite_note-clark-1). In addition, X-ray (http://www.iceinspace.com.au/wiki/X-ray) observations have revealed the presence of the magnetar (http://www.iceinspace.com.au/wiki/Magnetar) CXO J164710.2-455216 (http://www.iceinspace.com.au/wiki/CXO_J164710.2-455216) (also known as the Westerlund 1 magnetar), a slow X-ray pulsar (http://www.iceinspace.com.au/wiki/Pulsar) that must have formed from a high-mass progenitor star[3] (http://www.iceinspace.com.au/forum/#cite_note-2)[4] (http://www.iceinspace.com.au/forum/#cite_note-3). Westerlund 1 is believed to have formed in a single burst of star formation, implying the constituent stars have the same age and composition.
Besides hosting some of the most massive and least-understood stars in the galaxy, it is useful as an analog to help astronomers determine what occurs within extragalactic super star clusters (http://www.iceinspace.com.au/wiki/Super_star_cluster).

The brightest O7-8V main sequence (http://www.iceinspace.com.au/wiki/Main_sequence) stars in Wd1 have V-band photometric (http://www.iceinspace.com.au/wiki/Photometry_(astronomy)) magnitudes (http://www.iceinspace.com.au/wiki/Apparent_magnitude) around 20.5, and therefore at visual wavelengths Wd1 is dominated by highly luminous post-Main Sequence stars (V-band magnitudes of 14.5-18, absolute magnitudes (http://www.iceinspace.com.au/wiki/Absolute_magnitude) -7 to -10), along with less-luminous post-Main Sequence stars of luminosity class (http://www.iceinspace.com.au/wiki/Luminosity_class#Yerkes_spectral_cl assification) Ib and II (V-band magnitudes of 18-20). Due to the extremely high interstellar reddening towards Wd1, it is very difficult to observe in the U- and B-bands, and most observations are made in the R- or I-bands at the red end of the spectrum or in the infra red (http://www.iceinspace.com.au/wiki/Infra_red). Stars in the cluster are generally named using a classification introduced by Westerlund[5] (http://www.iceinspace.com.au/forum/#cite_note-4), although a separate naming convention is often used for the Wolf-Rayet stars.

Very interesting, active region.
Nice place to visit but you wouldn't want to live there. :lol:

Justin

[tornado33]

Very nice image. I must image that area with the lens, Ive done so in the past but not with the aperature stop. The detail and resolution in the image is amazing.
Perhaps I should image W1 cluster in the 10 inch too as a separate project
Scott