11 Ursae Minoris

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11 Ursae Minoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Minor
Right ascension 15h 17m 05.89s
Declination +71° 49′ 26.0″
Apparent magnitude (V) 5.024
Characteristics
Spectral type K4III
Apparent magnitude (B) 6.415
Apparent magnitude (J) 2.876
Apparent magnitude (H) 2.091
Apparent magnitude (K) 1.939
B−V color index 1.391
Astrometry
Radial velocity (Rv) –17.87 km/s
Proper motion (μ) RA: 3.97 ± 0.23 mas/yr
Dec.: 9.65 ± 0.21 mas/yr
Parallax (π) 8.19 ± 0.19 mas
Distance 398 ± 9 ly
(122 ± 3 pc)
Absolute magnitude (MV) –0.37[1]
Details
Mass 1.8 ± 0.25[1] M
Radius 24.08 ± 1.84[1] R
Luminosity 185[citation needed] L
Surface gravity (log g) 1.60[1] cgs
Temperature 4340 ± 70[1] K
Metallicity 0.04 ± 0.04[1]
Age 1.56 ± 0.54[1] Gyr
Other designations
BD+72°678, GCRV 8864, HD 136726, HIP 74793, HR 5714, PPM 8870, SAO 8207
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

11 Ursae Minoris (11 UMi, Iota Ursae Minoris) is a 5th magnitude K-type giant star located approximately 398 light years away[2] in the constellation Ursa Minor. It is sometimes named Pherkard or Pherkad Minor, the later name to distinguish it from Pherkad (Major) which is Gamma Ursae Minoris. This star is 1.8 times more massive, 24 times bigger, and 185 times more luminous than our Sun. This star has a detected planet discovered in August 2009.[1]

The 11 Ursae Minoris planetary system[1]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥10.50 ± 2.47 MJ 1.54 ± 0.07 516.22 ± 3.25 0.08 ± 0.03

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Coordinates: Sky map 15h 17m 05.8886s, +71° 49′ 26.044″