Mu2 Octantis

For other stars with this Bayer designation, see μ Octantis.
HD 196067
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Octans
Right ascension 20h 41m 44.102s[1]
Declination −75° 21′ 02.88″[1]
Apparent magnitude (V) +6.51[2]
Characteristics
Spectral type G1V[3]
U−B color index +0.26[4]
B−V color index +0.62[4]
Astrometry
Radial velocity (Rv)−10.90±0.2[5] km/s
Proper motion (μ) RA: 156.404[1] mas/yr
Dec.: −162.214[1] mas/yr
Parallax (π)25.0327 ± 0.0205 mas[1]
Distance130.3 ± 0.1 ly
(39.95 ± 0.03 pc)
Absolute magnitude (MV)3.28[3]
Details[3]
Mass1.29±0.08 M☉
Radius1.73±0.21 R☉
Luminosity3.73 L☉
Surface gravity (log g)4.24±0.03 cgs
Temperature6,017±46 K
Metallicity [Fe/H]+0.18±0.04 dex
Rotation26±3 days
Rotational velocity (v sin i)1.45 km/s
Age3.3±0.6 Gyr
Other designations
μ2 Oct A, CD−75°1173, HD 196067, HIP 102125, HR 7864, SAO 257836, CCDM J20417-7521A, 2MASS J20414409-7521029
Database references
SIMBADdata
Exoplanet Archivedata

Mu2 Octantis (μ2 Oct) is a binary star system of two G-type main-sequence stars. It shares the designation μ with μ1 Octantis, from which it is separated by 50 arcminutes.

Mu2 Octantis has a 29% higher mass than the sun, and is slightly hotter. Its radius is 73% more than the Sun's and it is nearly four times as luminous.

This star is a member of a wider binary star system. The two components are gravitationally bound and separated at 17 arcseconds in our sky, corresponding to 740 astronomical units (AU). The semimajor axis of the stars' orbit is 932 AU.[3] The companion star is HD 196068,[6] another G-type main-sequence star with an apparent magnitude of 7.18.[3]

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ "* mu.02 Oct". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 August 2017.
  3. ^ a b c d e Cite error: The named reference Marmier2013 was invoked but never defined (see the help page).
  4. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. ^ "HD 196068". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 August 2017.