Pi Ursae Minoris

The Bayer designation Pi Ursae Minoris (π UMi / π Ursae Minoris) is shared by two star systems, π¹ Ursae Minoris and π² Ursae Minoris, in the constellation Ursa Minor. They are separated by 0.64° on the sky.

π¹ Ursae Minoris

Starbox short
name=π¹ Ursae Minoris
epoch=J2000.0
constell=Ursa Minor
ra=15^h 29^m 23.77^s
dec=+80° 27' 00.3"
spectral=G0IV-V+G8IV-V
appmag_v=+6.58
dist_ly=70.8 ± 1.1
dist_pc=21.7 ± 0.3
names=HR 5829, HD 139777 +
HD 139813, BD+80 480 +
BD+80 481, HIP 75809 +
HIP 75829, SAO 2556 +
SAO 2558, GC 20929 +
GC 20935, ADS 9696,
CCDM 15293+8027

Pi-1 Ursae Minoris is a triple star system approximately 70.8 light years from Earth. The system is dominated by a binary pair of two yellow G-type subgiants which are 32 arcseconds apart and have apparent magnitudes of +6.9 and +7.8. They also have an 11th magnitude companion, Pi-1 Ursae Minoris C, which is 135 arcseconds away.

π² Ursae Minoris

Starbox short
name=π² Ursae Minoris
epoch=J2000.0
constell=Ursa Minor
ra=15^h 39^m 38.72^s
dec=+79° 58' 59.2"
spectral=F2
appmag_v=+6.89
dist_ly=384 ± 42
dist_pc=118 ± 13
names=HD 141652, BD+80 487,
HIP 76695, SAO 2588,
GC 21163, ADS 9769,
CCDM 15396+7959

Pi-2 Ursae Minoris is a binary star approximately 384 light years from Earth. The primary component, Pi-2 Ursae Minoris A, is a yellow-white F-type star with an apparent magnitude of +6.89. The companion star, Pi-2 Ursae Minoris B, has an apparent magnitude of +8.3 and is 0.67 arcseconds from the primary. The binary star completes one orbit every 188 years.