czsky/en/star/Kruger_60.md

name	constellation	created_by	created_date	updated_by	updated_date
Kruger 60	Cep	editor.cs	2022-01-21 17:00:00	skybber	2022-01-23 13:42:38.399054

though invisible to the naked eye, otherwise a well-known and interesting binary star. It lies 43' south of δ Cephei. A minimum of 120mm binoculars and high magnification will be needed to resolve the main component of 9.8mag brightness and its companion 11.3mag, as they lie 2.4 arc seconds apart. It is located at a distance of only 13.1 light years, making it one of our closest binaries. The mutual orbit of these red dwarfs is only 44.5 years. Their mean distance is 1.4 billion km, which is equivalent to the Sun-Saturn distance. The mass of the main star is about 0.25 of the mass of the Sun, and the mass of its companion is only 0.15 of the mass of the Sun, and their luminosities are even smaller.