Nu¹ Arae
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- For other star systems with this Bayer designation, see Nu Arae.
| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Ara |
| Right ascension | 17h 50m 28.2s |
| Declination | −53° 36' 44" |
| Apparent magnitude (V) | +5.68 |
| Distance | 820 ly (250 pc) |
| Spectral type | B2V+B3V |
| Other designations | |
Nu1 Arae (Nu1 Arae / ν1 Ara / ν1 Arae) is a triple star system approximately 820 light years from the Earth. The primary component, ν1 Arae A, is an eclipsing binary of which both components are detached blue-white B-type main sequence dwarfs which do not fill their Roche lobes. A third companion, the 9th magnitude ν1 Arae C, orbits the binary with a separation of 12.3 arcseconds. The mean brightness of the system is +5.67, but because of the eclipses, ν1 Arae is a variable star and its brightness varies from magnitude +5.66 to +6.18 with a period equal to the orbital period of the binary, which is 3.17 days.
The system is sometimes referred as Upsilon1 Arae (υ1 Arae).
