S Ursae Minoris

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]
Distance1,280 ± 80 ly
(390 ± 20 pc)
Other designations
S UMi, HD 139492, HIP 75847[4]
Database references
SIMBADdata

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]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  3. ^ a b c d Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
  4. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).