Friday, February 23, 2018

processed STF 1360 in colour

Processed HD 82159 in colour in Photoshop using the data gathered on 6 Feb. And I have to say, I do not see any notable colour in the A and B stars. When I zoom in they both look very pale yellow to me.

STF 1360 in full colour

Luminance 2x10 and RGB 2x20 each.

Checked the stellar classification of the A primary star and it is G5. That's not unlike our Sun. A yellowy star. SkyTools says the B companion is a K0, to the orange side. One class level apart so very similar.

C, at the 10 o'clock position, is very dim and looks grey.

D, the furthest out, brighter, looks blue-white.

The PPM 126514 star near the top-right of the image is pale orange.

I looked at the DSS Colored image in SIMBAD/Aladin. A looks white; B has a hint of orange. That's the opposite of my visual colour impressions.

The B-V index for A is 0.905; and B is 0.878.

The RASC Observer's Handbook says they are blue and green. Huh. The first visual observations left me thinking they were orange and blue. Wow.

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