Saturday, January 27, 2018

returned to STF 1327 (Halifax)

I wanted to triple-check colours and positions of the companions of Σ1327 so I asked the Burke-Gaffney Observatory to image the multi-star system in the constellation of Cancer.

multi-star system STF 1327 in luminance

Luminance only, 4 seconds subexposures, 10 stacked shots. FITS Liberator, GIMP. North is up; east is left.

I observed this system 16 Feb '14. And we sorted out the odd details on 16 Apr '14.

A and B are very close together. SkyTools says they are 5.5 arc-seconds apart, which is nearly the resolution limit of this imaging system. Still, there's a gap, a black line between. B is north-east of A. C is much further away, to the north. In luminance, B and C seem equally bright. C and D, at 2.2" and a high Δm, are not resolved.

I look forward to inspecting the results with the LRGB colour data.


Imaged again on 5 Mar '21 and processed in colour.

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