61 Cyg

[Davey-T]

Not much activity on the DS forum so I took this last night between the clouds, not a particularly pretty double but significant as the star used by Friedrich Bessel in 1838 to measure the distance to stars using parallax and he

came up with a distance of 10 lightyears

Dave

[Qualia]

Grreat image, Dave of Piazzi's Flying Star. I found the double quite a pleasing pair of yellow K type dwarfs.

[Astro Imp]

Nice capture, well done.

[cotterless45]

Love these stars, always makes me think of a pair of trapeze artists ! Nice capture,

Nick.

[Tiki]

Nice image. Bessel also discovered a function (zeroth order Bessel function) that happens to describe the pressure within a white dwarf. I have always hitherto assumed that Bessel was solely a mathematician.

[Davey-T]

Nice image. Bessel also discovered a function (zeroth order Bessel function) that happens to describe the pressure within a white dwarf. I have always hitherto assumed that Bessel was solely a mathematician.

Think there was a bit of math involved as the measured parallax was less than half an arc sec.

Dave