Mu Herculis - AN's Double Star of the month for July

[chiltonstar]

Quite a challenge, but worth a look!

I found it quite easily naked eye to the W of Lyra using SkySafari. With the 180 mak at x70, the star is a pretty double with a bright mag 3.5 yellowish white primary, with a faint blueish secondary* well separated from it. At x270, the faint secondary is obviously not a single star, and at x450 with averted vision it could be seen as touching figure of eight. Slightly easier to see the split of the faint pair by running the main star off the edge of the field and leaving the drive on with the fainter pair visible.

CDSA lists the mags as 3.5, 10.2, 10.7.

Finished off with 10 minutes on Saturn before it went behind a roof.

Chris

*The blue colour of the secondary pair may be Purkinje effect of course.