RT Trianguli Australis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum Australe |
| Right ascension | 16h 34m 30.89188s [1] |
| Declination | −63° 08′ 00.8395″ [1] |
| Apparent magnitude (V) | 8.1-9.79[2] |
| Characteristics | |
| Evolutionary stage | Type II Cepheid |
| Spectral type | F8:(R)-G2I-II[2] |
| Astrometry | |
| Proper motion (μ) | RA: -4.00 ± 1.48[3] mas/yr Dec.: -14.25 ± 1.43[3] mas/yr |
| Parallax (π) | 1.26 ± 1.50[3] mas |
| Other designations | |
RT Trianguli Australis, or RT TrA, is a BL Herculis variable (type II Cepheid) in the constellation of Triangulum Australe.[1] It ranges between apparent magnitudes 8.1 and 9.79 over a period of 22 days.[2] It is unusual in that it is a carbon-rich type II Cepheid.[4]
References
- 1 2 3 SIMBAD, RT Trianguli Australis (accessed 13 July 2014)
- 1 2 3 Watson, Christopher (4 January 2010). "RT Trianguli Australis". AAVSO Website. American Association of Variable Star Observers. Retrieved 13 July 2014.
- 1 2 3 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ↑ Wallerstein, George; Matt, Sean; Gonzalez, Guillermo (2000), "The Carbon Cepheid RT Trianguli Australis: Additional Evidence of Triple-α and CNO Cycling", Monthly Notices of the Royal Astronomical Society 311 (2): 414–22, Bibcode:2000MNRAS.311..414W, doi:10.1046/j.1365-8711.2000.03064.x
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