R Ursae Minoris

R Ursae Minoris

A visual band light curve for R Ursae Minoris, plotted from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Minor
Right ascension 16h 29m 57.8923s[2]
Declination +72° 16′ 49.166″[2]
Apparent magnitude (V) 8.5-11.5[3]
Characteristics
Spectral type M7IIIe[3]
Variable type semiregular variable[3]
Astrometry
Proper motion (μ) RA: 11.973±0.085[2] mas/yr
Dec.: 13.976±0.092[2] mas/yr
Parallax (π)2.6648 ± 0.0629 mas[2]
Distance1,220 ± 30 ly
(375 ± 9 pc)
Absolute magnitude (MV)+2.461[4] (var)
Details
Mass1.71[5] M☉
Radius686[6] R☉
Surface gravity (log g)−0.46[5] cgs
Temperature2,875[5] K
Metallicity [Fe/H]+0.07[5] dex
Other designations
R UMi, BD+72°732a, HD 149683, HIP 80802[7]
Database references
SIMBADdata

R Ursae Minoris is a star in the constellation Ursa Minor. A red giant of spectral type M7IIIe, it is a semiregular variable ranging from magnitude 8.5 to 11.5 over a period of 325 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 edr3 was invoked but never defined (see the help page).
  3. ^ a b c d Watson, Christopher (4 January 2010). "RR Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
  4. ^ Cite error: The named reference gontcharov2011 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference starhorse2 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference kervella2022 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).