Thursday, May 18, 2017

made colour image of BU 284

Rendered multi-star system HD 167287 aka β 284 aka SAO 161217 in colour using the LRGB data from Tuesday night.

multi-star BU 284 in colour

Tried something different this time in FITS Liberator. After applying the ArcSin stretch, I moved the black point slightly left to the first full dip. I moved the white point far to the right essentially including all the detected data. And I did NOT hit the Auto Scaling button. I saved the images at that point. The TIFFs looked much brighter than what I've done in the past. 

Simple processing in Photoshop: import, copy into layers, align, colourised each layer, set the RGB layers to screen, set the luminance layer, then a single Levels and Curves to the top, bumped the saturation 5%, and—to a copied layer—applied a 0.5 pixel blur .

This attractive image shows A, B, C, D, E, G/P, H/Q and R are all blue-white. F is a pale orange.

Hard to say what the colour is for dim S. Is it orange?!

It looks like the stars in ARA 741 are also blue-white.

Love the little string of 3 stars at the top of the image, red, orange, and blue!

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Rhonda likes the colourful little equilateral triangle at the top-left.

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