Rho Tucanae

Rho Tucanae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Tucana
Right ascension 00h 42m 28.37166s[1]
Declination −65° 28′ 04.9100″[1]
Apparent magnitude (V) +5.38[2]
Characteristics
Spectral type F6 V[3]
U−B color index +0.00[2]
B−V color index +0.50[2]
Astrometry
Radial velocity (Rv)33.962±0.796[4] km/s
Proper motion (μ) RA: +53.07[1] mas/yr
Dec.: +40.94[1] mas/yr
Parallax (π)24.37 ± 0.27 mas[1]
Distance134 ± 1 ly
(41.0 ± 0.5 pc)
Absolute magnitude (MV)+2.75[5]
Orbit[6]
Period (P)4.8202 d
Eccentricity (e)0.02
Periastron epoch (T)2419299.11 JD
Semi-amplitude (K1)
(primary)		26.1 km/s
Details
ρ Tuc A
Mass1.66[7] M☉
Luminosity9.7[8] L☉
Surface gravity (log g)3.64±0.11[4] cgs
Temperature6,034±54[4] K
Metallicity [Fe/H]−0.26[4] dex
Rotational velocity (v sin i)23.5±1.2[5] km/s
Age2.64[3] Gyr
ρ Tuc B
Mass0.33[7] M☉
Other designations
ρ Tuc, CP−66° 47, FK5 2047, HD 4089, HIP 3330, HR 187, SAO 248237[9]
Database references
SIMBADdata

Rho Tucanae (ρ Tuc, ρ Tucanae) is a binary star system in the southern constellation of Tucana. It is visible to the naked eye with a combined apparent visual magnitude of +5.38.[2] Based upon an annual parallax shift of 24.37 mas as seen from Earth, it is located 131 light years from the Sun.

This is a single-lined spectroscopic binary with a close, nearly circular orbit having a period of 4.82 days and an eccentricity of 0.02.[6] The primary member, component A, is a yellow-white hued F-type main sequence star with a stellar classification of F6 V.[3] It is around 2.6 billion years old and a member of the thin disk population.[3] The primary has about 1.66 times the mass of the Sun while the secondary is just 0.33 times the Sun's mass.[7]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Ibukiyama2002 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Kunder2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Reiners2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Pourbaiz2004 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Tokovinin2014 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).