Calibrating the metallicity of M dwarfs in wide physical binaries with F-, G-, and K-primaries - I: High-resolution spectroscopy with HERMES: stellar parameters, abundances, and kinematics (англ.) // Monthly Notices of the Royal Astronomical Society, Volume 479, Issue 1, p.1332-1382. — VizieR -External archives - (radius: 6 arcsec) для eta UMi - Binaries with F, G or K primaries and M dwarfs (Montes+, 2018) - 2018MNRAS.479.1332M (самый подробный источник о втором компоненте), 09.2018. — doi:10.1093/mnras/sty1295.
Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric. Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomal // Astronomy & Astrophysics, Volume 623, id.A72, 23 pp.. — VizieR - External archives - (radius: 6 arcsec) для eta UMi - Binarity of Hipparcos stars from Gaia pm anomaly (Kervella+, 2019) - 2019A&A...623A..72K (ссылка данных на источник)., 03.2019. — doi:10.1051/0004-6361/201834371. — Bibcode: 2019A&A...623A..72K.
Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants // The Astronomical Journal, Volume 153, Issue 1, article id. 21, 19 pp. (2017).. — Abundances in the local region. II. F, G, and K dwarfs (Luck+, 2017) -2017AJ....153...21L, 01.2017. — doi:10.3847/1538-3881/153/1/21. — Bibcode: 2017AJ....153...21L.
Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric. Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomal // Astronomy & Astrophysics, Volume 623, id.A72, 23 pp.. — VizieR - External archives - (radius: 6 arcsec) для eta UMi - Binarity of Hipparcos stars from Gaia pm anomaly (Kervella+, 2019) - 2019A&A...623A..72K (ссылка данных на источник)., 03.2019. — doi:10.1051/0004-6361/201834371. — Bibcode: 2019A&A...623A..72K.
Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants // The Astronomical Journal, Volume 153, Issue 1, article id. 21, 19 pp. (2017).. — Abundances in the local region. II. F, G, and K dwarfs (Luck+, 2017) -2017AJ....153...21L, 01.2017. — doi:10.3847/1538-3881/153/1/21. — Bibcode: 2017AJ....153...21L.
nasa.gov
ntrs.nasa.gov
Jack W. Rhoads. A Reduced Star Catalog Containing 537 Named Stars. — Jet propulsion laboratory California institute of technology Pasadena, California.. — 1971. — ISBN ISBN https://ntrs.nasa.gov/search.jsp?R=19720005197.