Tuesday, September 08, 2020

split T Cyg (Halifax)

On the evening of 13 Jun '20, from the backyard, with the C8, I tried to split T Cygni (BU 677). I did not successful see the allies of the triple. This seemed odd as they were not overly tight to the primary nor were they terribly dim. Used every ocular in the arsenal.

Sounds like a job for BGO!

Centring on TYC 02695-3170 1, I collected photons of T Cyg. And there they are...

double star T Cygni in luminance

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

The B star is close in, at the 8 o'clock position, or south-east.

The C star, slightly dimmer, is at 5 o'clock. That's south-west.

Pretty easy... I wonder why I wasn't able to tag them with my rig? Was I tired? Bad seeing? Cloud? Too much contrast? Was I on the right star?!

Huh. There's another star! About the same separation as C, but on the diffraction spike to the west, so with a position angle of 270. It's really dim though.

Left of centre, to the east, there is the obvious, tight, faint pair, oriented nearly north-south. I had identified that before with the WDS as ES 249.

Once again, there are a ton of doubles and triples in the area...

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