Friday, January 15, 2021

interested in STF 479 (Halifax)

Bright Moon time. I commanded BGO to image Σ479. This is from Haas. She describes this double star as a "close pair of white stars and a very wide brown-cherry star in an L-shape." Brown? Cherry-brown? Huh.

Aimed at HIP 18748 (or HD 25201) in Taurus.

triple star Struve 479 in luminance

Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; east is left.

A and B are at a 45 degree angle to one another. A is very slightly brighter to the north-west. B would have a PA around 135°. C looks like it is at about 240°. 7 or 8 times the AB separation.

SkyTools 3 Pro says this, from the Object Information box:

  • A is mag 6.5
  • B is mag 7.9, 7.4" at 127°
  • C is mag 9.0, 58.3" at 242°

When I point to the stars in the Interactive Atlas, I get the magnitudes:
  • A 6.5
  • B 7.7
  • C 9.4
Those seem like better numbers.

Shot the colour data channels at 3 times the duration.

I will assemble in colour as soon as possible...


Check out all the observing reports on the Spirit of 33 page.

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