Pi Arae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 38m 05.51512s[1] |
| Declination | –54° 30′ 01.5643″[1] |
| Apparent magnitude (V) | +5.25[2] |
| Distance | 145.5 ± 1.6 ly (44.6 ± 0.5[1] pc) |
| Spectral type | A5 IV-V[3] |
| Other designations | |
Pi Arae (π Ara, π Arae) is the Bayer designation for a star in the southern constellation of Ara. It is approximately 145.5 light-years (44.6 parsecs) from Earth[1] and has an apparent visual magnitude of +5.25[2] The stellar classification of this star is A5 IV-V,[3] with the spectrum showing features of both a main sequence and a subgiant star. Pi Arae is roughly 170 million years old. It displays an excess emission of infrared radiation, which may be explained by a circumstellar disk of dust.[5]
References
- 1 2 3 4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- 1 2 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ↑ "HR 6549 -- Star", SIMBAD (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-31
- ↑ Morales, Farisa Y.; et al. (April 2011), "Common Warm Dust Temperatures Around Main-sequence Stars", The Astrophysical Journal Letters 730 (2): L29, Bibcode:2011ApJ...730L..29M, doi:10.1088/2041-8205/730/2/L29.
External links
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