RU Ursae Minoris
Star
RU Ursae Minoris is a binary star system in the constellation Ursa Minor. Its apparent magnitude ranges from 10 to 10.66 over 0.52 days as one star passes in front of the other relative to observers on Earth. Wikipedia
Distance to Earth: 1,076 light years
Absolute bolometric magnitude (Mbol): 2.48 ± 0.12 (A); 5.37 ± 0.19 (B)
Apparent magnitude (V): 10 - 10.66
Semi-major axis (a): 3.99 ± 0.02 M☉