11 Ursae Minoris

Coordinates: Sky map 15h 17m 05.8886s, +71° 49′ 26.044″
Source: Wikipedia, the free encyclopedia.
11 Ursae Minoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Minor
Right ascension 15h 17m 05.89154s[1]
Declination +71° 49′ 26.0375″[1]
Apparent magnitude (V) 5.15[2]
Characteristics
Spectral type K4 III[3]
Apparent magnitude (B) 6.664[2]
Apparent magnitude (J) 2.657[2]
Apparent magnitude (H) 1.931±0.192[2]
Apparent magnitude (K) 1.701±0.198[2]
B−V color index 1.514±0.004[2]
Distance
410 ± 6 ly
(126 ± 2 pc)
Absolute magnitude (MV)–0.37[4]
Details
Gyr
GCRV 8864[5]
Database references
Exoplanet Archive
data

11 Ursae Minoris is a single

apparent visual magnitude of 5.15.[2] It is moving closer to the Earth with a heliocentric radial velocity of −17.5 km/s.[1]

This is an aging

luminosity of the Sun from its swollen photosphere at an effective temperature of 4,358 K.[3]

11 Ursae Minoris is sometimes named Pherkard or Pherkad Minor, the later name to distinguish it from Pherkad (Major) which is γ Ursae Minoris. It has also been designated as γ1 Ursae Minoris, in which case the brighter Pherkad is called γ2 Ursae Minoris, but these names are rarely used.[7] 11 Ursae Minoris is the Flamsteed designation.

11 Ursae Minoris has a detected planet discovered in August 2009.[4]

Planetary system

11 Ursae Minoris b was discovered during a radial velocity survey of 62 K type Red giant stars using the 2m Alfred Jensch telescope of the Thuringian State Observatory in Germany.[4]

The 11 Ursae Minoris planetary system[4]
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 — —

See also

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644
    .
  3. ^
    S2CID 119427037
    .
  4. ^
    S2CID 9686080
    .
  5. ^ "11 UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 September 2012.
  6. S2CID 14878976
    .
  7. Bibcode:2004yCat.4027....0K
    .

External links


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