Eta Telescopii
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| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Telescopium |
| Right ascension | 19h 22m 51.1s |
| Declination | –54° 25′ 25″ |
| Apparent magnitude (V) | +5.03 |
| Distance | 155 ± 5 ly (47.7[1] pc) |
| Spectral type | A0 Vn[1] |
| Other designations | |
Eta Telescopii (η Tel, η Telescopii) is a star in the southern constellation of Telescopium. This is a white-hued A-type main sequence star with an apparent visual magnitude of +5.03. It is approximately 155 light years from Earth and is a member of the Beta Pictoris Moving Group of stars that share a common motion through space.
This star has 2.9 times the mass of the Sun and is radiating around 22 times the Sun's luminosity from its outer atmosphere at an effective temperature of 9,506 K. The age of the star is only about 30 million years. It is emitting an excess of infrared radiation that suggests the presence of a circumstellar disk of dust at an orbital radius of 25 AU from the host star.[1]
[edit] References
- ^ a b c Wyatt, M. C. et al. (July 2007), "Steady State Evolution of Debris Disks around A Stars", The Astrophysical Journal 663 (1): 365–382, arXiv:astro-ph/0703608, Bibcode 2007ApJ...663..365W, doi:10.1086/518404
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