56 Ursae Majoris

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56 Ursae Majoris
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major
Right ascension 11h 22m 49.58373s[1]
Declination +43° 28′ 57.7267″[1]
Apparent magnitude (V) 5.03[2]
Characteristics
Spectral type G7IIIBa0.3[3]
U−B color index +0.82[4]
B−V color index +1.02[4]
Astrometry
Radial velocity (Rv) 1.01 ± 0.05[5] km/s
Proper motion (μ) RA: -37.42[1] mas/yr
Dec.: -14.26[1] mas/yr
Parallax (π) 6.12 ± 0.27[1] mas
Distance 530 ± 20 ly
(163 ± 7 pc)
Orbit[5]
Period (P) 16460 ± 631 d
Eccentricity (e) 0.555 ± 0.016
Periastron epoch (T) 2451521 ± 35
Argument of periastron (ω)
(secondary)
286.8 ± 2.0°
Semi-amplitude (K1)
(primary)
3.84 ± 0.04 km/s
Other designations
BD+44° 2083, FK5 2908, HD 98839, HIP 55560, HR 4392, SAO 43719
Database references
SIMBAD data

56 Ursae Majoris (56 UMa) is a star in the constellation Ursa Major. Its apparent magnitude is 5.03.[2] It is a single-lined spectroscopic binary with an orbital period of about 45 years.[5]

References[edit]

  1. ^ a b c d e van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ Lu, Phillip K. (1991). "Taxonomy of barium stars". Astronomical Journal. 101: 2229–2254. Bibcode:1991AJ....101.2229L. doi:10.1086/115845. 
  4. ^ a b Fernie, J. D. (1983). "New UBVRI photometry for 900 supergiants". Astrophysical Journal Supplement Series. 52 (7–22). Bibcode:1983ApJS...52....7F. doi:10.1086/190856. 
  5. ^ a b c Pourbaix, D.; et al. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. arXiv:astro-ph/0406573Freely accessible. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213.