61 Cygni / ˈ s ɪ ɡ n i / is a binary star system in the constellation Cygnus, consisting of a pair of K-type dwarf stars that orbit each other in a period of about 659 years.

Aug 11, 2023 · 61 Cygni is a double star in the constellation Cygnus the Swan. It’s not a standout in brightness. Why go to the trouble of finding it? Stars are individuals, and there’s something …

61 Cygni, first star whose distance from Earth was measured. German astronomer Friedrich Wilhelm Bessel obtained a value of 10.3 light-years in 1838; the European Space Agency …

61 Cygni is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 61 Cygni double sysyem: 61 Cygni is distant …

Jun 3, 2015 · Our second featured star, 61 Cygni, is one of summer's best and brightest double stars — a gorgeous pair of orange-red dwarfs (magnitudes 5.2 and 6.0) located 11.4 light …

61 Cygni was the first star system (other than the Sun) to have its distance to Earth successfully calculated by Friedrich Wilhelm Bessel (1784-1846) using trigonometric parallax and the …

61 Cygni is a binary star system in the constellation Cygnus. The system consists of a pair of K-type dwarf stars that orbit each other in a period of about 659 years. The stars have an …

Sep 1, 2017 · We now know that 61 Cygni is a pair of orange (type K) main sequence stars, both of which are smaller, cooler, and older than our Sun. The primary sun, 61 Cygni A, shines at …

Jul 31, 2023 · 61 Cygni is a fifth-magnitude star that lies eight degrees south-east of Deneb (alpha [a] Cyg) and 1.7 degrees north-west of magnitude +3.7 tau (t) Cyg. The modern value for its …

61 Cygni-A is an orange-red main-sequence dwarf star of spectral type K3.5-5.0Ve. It has about 70 percent of a solar mass, 72 percent of its diameter and about 8.5 percent of its luminosity. It …