BETA CYGNI

DOUBLE STAR IN CYGNUS

(Image centered at: ra 19:31.32 / dec + 28:00)

  October 2020 - Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Double Star

VISUAL BRIGHTNESS: 2,9

APPARENT SEPARATION: 34,3 arc seconds

DISTANCE: 430 light years

IMAGE INFORMATION

SCOPE: ORION OPTICS UK 8" f5 Newtonian w/Televue Paracorr working at f5,75

CAMERA: QSI 583 WS

MOUNT: SKY WATCHER NEQ6

FILTERS: Baader LRGB Set

SKY CONDITIONS: Urban Skies

EXPOSURES: LRGB (10,10,10,10) all bin 1x1 

OBJECT DESCRIPTION AND IMAGE SESSION

The primary star, Albireo Aa, is believed to be itself a triple star system. Is a bright yellow giant star of spectral type K2II. It has an apparent magnitude of 3,28. It is around 14,52 solar masses and a radius of about 69 time the size of the Sun. Albireo is cooler than our Sun with a surface temperature of 4.270 K  average but is approximately 1200 brighter than our Sun.

Albireo B has around 3,84 solar masses and a radius calculated in 2,59 times the size of our Sun. It is pretty much hotter than Albireo Aa, since it has an average surface of 13,200 K. Albireo B is 230 times brighter than our Sun and it has been estimated to be much younger at around 100 million years.

Beta Cygni though is not the second brighter star in its constellation. It is actually fainter than Gamma Cygni, Delta Cygni and Epsilon Cygni.