R Arae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 16h 39m 44.7306s[1] |
| Declination | −56° 59′ 39.867″[1] |
| Apparent magnitude (V) | 6.65[1] |
| Characteristics | |
| Spectral type | B9IV/V[1] |
| B−V color index | 0.09[1] |
| Variable type | Algol[2] |
| Astrometry | |
| Proper motion (μ) | RA: -8.34[1] mas/yr Dec.: -18.85[1] mas/yr |
| Parallax (π) | 8.06 ± 1.66[1] mas |
| Distance | approx. 400 ly (approx. 120 pc) |
| Absolute magnitude (MV) | 1.18 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
R Arae is an Algol-type eclipsing binary in the constellation Ara. Located approximately 124 parsecs (400 ly) distant,[1] it normally shines at magnitude 6.17, but during eclipses can fall as low as magnitude 7.32.[2] It has been suggested by multiple studies that mass transfer is occurring between the two stars of this system,[3][4] and the period of eclipses seems to be increasing over time.[4]
References
- 1 2 3 4 5 6 7 8 9 "R Arae". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 30 June 2014.
- 1 2 VSX (25 October 2010). "R Arae". AAVSO Website. American Association of Variable Star Observers. Retrieved 30 June 2014.
- ↑ Nield, K. M. (1991). "Observations and analysis of the Southern binary R Arae". Astrophysics and Space Science. 180 (2): 233. Bibcode:1991Ap&SS.180..233N. doi:10.1007/BF00648180.
- 1 2 Reed, P. A.; McCluskey Jr., G. E.; Kondo, Y.; Sahade, J.; Guinan, E. F.; GiméNez, A.; Caton, D. B.; Reichart, D. E.; Ivarsen, K. M.; Nysewander, M. C. (2010). "Ultraviolet study of the active interacting binary star R Arae using archivalIUEdata". Monthly Notices of the Royal Astronomical Society. 401 (2): 913. arXiv:0909.4047
. Bibcode:2010MNRAS.401..913R. doi:10.1111/j.1365-2966.2009.15741.x.
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