Westerlund 1 LRGB and L-IR807-GB Comparison – Brisbane 29th July 2016

[Dennis]

I was browsing my observing lists in SkyTools 3 Professional Edition and came across the Open Cluster Westerlund 1 in Ara and fitted an Astronomik ProPlanet 807 IR-pass filter in the filter wheel to compare an LRGB series with an L-IR807-GB series.

http://www.astronomik.com/en/photogr...07-filter.html

I captured 10 subframes at 60 secs for each of the 5 filters and used CCDStack to calibrate, align and stack the frames. These are more or less straight out of the ST2000XM with minimal processing in CS6.

I also made a lo-res animation for an interesting comparison.



SkyTools Data
Westerlund 1
Open Cluster
aka OCL 985
R.A.: 16h47m04.0s Dec.: -45°50'36" (2000) in Ara
Magnitude: unknown
Size: 3.0'
Distance: 17000 ly
Apparent RA: 16h48m17.7s, Apparent Dec: -45°52'18"

Cheers

Dennis

[Stevec35 (Steve)]

Interesting Dennis! I've often been tempted to have a go at this one myself but have never got round to it.

Cheers

Steve

[Dennis]

Originally Posted by Stevec35

Interesting Dennis! I've often been tempted to have a go at this one myself but have never got round to it.

Cheers

Steve

Thanks Steve, this is one of the brighter and easier “of the off the beaten track” objects.

Cheers

Dennis