- Source: Epsilon Tucanae
Epsilon Tucanae (ε Tuc, ε Tucanae) is a solitary star in the southern constellation of Tucana. With an apparent visual magnitude of +4.50, it is faintly visible to the naked eye. Based upon an annual parallax shift of 8.74 mas as seen from Earth, it is located around 373 light years from the Sun.
Levenhagen and Leister (2008) classified this star as B8 V, indicating a blue-white hued B-type main sequence star. However, Hiltner, Garrison, and Schild (1969) listed it with a classification of B9 IV, suggesting it may be a more evolved subgiant star. It is a rapidly rotating Be star that is an estimated 78% of the way through its main sequence lifetime. The projected rotational velocity is 300 km/s, which is giving it an oblate shape with an equatorial bulge that is an estimated 36% larger than the polar radius. It has a weak magnetic field with a strength of 74±24 G.
It is the last star in the Hipparcos catalogue, HIP 118322, from the Hipparcos (1989–1993) astrometry satellite.
References
Kata Kunci Pencarian:
- Daftar planet luar surya yang ditemukan pada tahun 2019
- Epsilon Tucanae
- Tucana
- Eta Tucanae
- Superluminal communication
- List of star systems within 150–200 light-years
- List of star systems within 70–75 light-years
- List of brightest natural objects in the sky
- List of star systems within 100–150 light-years
- Solar analog
- Stellar designations and names
