S Ursae Minoris

S Ursae Minoris (S UMi) is a long period variable star in the constellation Ursa Minor, ranging from magnitude 7.5 to fainter than 13.2 over a period of 331 days.^[3]

S Ursae Minoris

The visual band light curve of S Ursae Minoris, from AAVSO data[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Ursa Minor
Right ascension	15h 29m 34.5775s[2]
Declination	+78° 38′ 00.2742″[2]
Apparent magnitude (V)	7.5-<13.2[3]
Characteristics
Spectral type	M6e-M9e[3]
Variable type	long period variable[3]
Astrometry
Proper motion (μ)	RA: −30.986±0.303[2] mas/yr Dec.: 7.006±0.309[2] mas/yr
Parallax (π)	2.5455±0.1578 mas[2]
Distance	1,280 ± 80 ly (390 ± 20 pc)
Other designations
S UMi, HD 139492, HIP 75847[4]
Database references
SIMBAD	data