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
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