Mu1 Octantis

For other stars with this Bayer designation, see μ Octantis.
μ1 Octantis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Octans
Right ascension 20h 42m 02.9873s[1]
Declination −76° 10′ 50.131″[1]
Apparent magnitude (V) 5.98 ± 0.01[2]
Characteristics
Spectral type F6 II/III[3]
U−B color index +0.11[4]
B−V color index +0.44[4]
Astrometry
Radial velocity (Rv)−36 ± 4[5] km/s
Proper motion (μ) RA: +190.891[1] mas/yr
Dec.: −9.479[1] mas/yr
Parallax (π)9.7399 ± 0.0241 mas[1]
Distance334.9 ± 0.8 ly
(102.7 ± 0.3 pc)
Absolute magnitude (MV)+0.97[6]
Details
Mass1.36+0.26
−0.19[7] M☉
Radius4.68+0.15
−0.32[7] R☉
Luminosity34.3[8] L☉
Surface gravity (log g)3.23+0.11
−0.07[7] cgs
Temperature6,521[8] K
Metallicity [Fe/H]+0.19[9] dex
Age900[9] Myr
Other designations
μ1 Oct, 50 G. Octantis, CD−76°1054, CPD−76°1434, GC 28731, HD 196051, HIP 102162, HR 7863, SAO 257838, LTT 8161
Database references
SIMBADdata

Mu1 Octantis, Latinized from μ1 Octantis, is a solitary star in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.98,[2] allowing it to be faintly visible to the naked eye under ideal conditions. Located 335 light years away,[1] it is approaching the Sun with a heliocentric radial velocity of −36 km/s.[5]

This object is an F-type star with the blended luminosity class of a giant star and a bright giant.[3] At present it has 1.36 times the mass of the Sun[7] but has expanded to 4.68 times its girth.[7] It radiates at 34.3 L☉ from its enlarged photosphere at an effective temperature of 6,521 K,[8] giving it a yellow white glow. Mu1 Octantis is metal enriched and has an age of 900 million years.[9]

  1. ^ a b c d e f Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).