Gamma2 Fornacis

For other stars with this Bayer designation, see γ Fornacis.
γ2 Fornacis
Location of γ2 Fornacis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Fornax
Right ascension 02h 49m 54.1822s[1]
Declination −27° 56′ 31.123″[1]
Apparent magnitude (V) 5.389[2]
Characteristics
Evolutionary stage Main sequence[3]
Spectral type A1 V[4]
B−V color index 0.013±0.004[5]
Astrometry
Radial velocity (Rv)24.0±4.2[6] km/s
Proper motion (μ) RA: −47.053[1] mas/yr
Dec.: 20.932[1] mas/yr
Parallax (π)6.3134 ± 0.1330 mas[1]
Distance520 ± 10 ly
(158 ± 3 pc)
Absolute magnitude (MV)−0.35[5]
Details
Mass2.40+0.44
−0.38[2] M☉
Radius4.488[7] R☉
Luminosity117.073±0.111[7] L☉
Surface gravity (log g)3.50±0.25[2] cgs
Temperature9,000±500[2] K
Metallicity [Fe/H]−0.02[8] dex
Rotational velocity (v sin i)149[3] km/s
Age401+138
−170[2] Myr
Other designations
γ2 For, CD−28°903, HD 17729, HIP 13202, HR 845, SAO 168082[9]
Database references
SIMBADdata

Gamma2 Fornacis, a name Latinized from γ2 Fornacis, is a single[10] star in the southern constellation Fornax. It has a white hue and is faintly visible to the naked eye at night with an apparent visual magnitude of 5.4.[2] The distance to Gamma2 Fornacis is approximately 520 light years based on parallax.[1] It is drifting further away with a radial velocity of 24 km/s.[6] Gamma1 Fornacis is a 6th magnitude star about four degrees to the north.[11]

The stellar classification of Gamma2 Fornacis is A1 V,[4] which is notation for an A-type main-sequence star that, like the Sun, is generating energy through core hydrogen fusion. Comparison of its properties to theoretical models suggest an age of about 400[2] million years old. It has a high rate of spin, showing a projected rotational velocity of 149 km/s.[3] The star has 2.4[2] times the mass of the Sun and 4.5[7] times the Sun's radius. It is radiating 117[7] times the luminosity of the Sun from its photosphere at an effective temperature of roughly 9,000 K.[2]

  1. ^ a b c d e f Cite error: The named reference dr2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i Cite error: The named reference gullikson2016 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1982 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference pulkovo was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference mcdonald2017 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference starhorse 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).
  10. ^ Cite error: The named reference Eggleton_Tokovinin_2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Sinnott_Perryman_1997 was invoked but never defined (see the help page).