Upsilon Gruis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Grus |
| Right ascension | 23h 06m 53.62552s |
| Declination | −38° 53′ 32.2484″ |
| Apparent magnitude (V) | 5.614 |
| Characteristics | |
| Spectral type | A1V |
| B−V color index | +0.01 |
| Astrometry | |
| Radial velocity (Rv) | +16 km/s |
| Proper motion (μ) | RA: +34.31 mas/yr Dec.: +6.40 mas/yr |
| Parallax (π) | 11.45±0.56 mas |
| Distance | 280 ± 10 ly (87 ± 4 pc) |
| Absolute magnitude (MV) | +0.92 |
| Details | |
| Radius | 2.2 R☉ |
| Luminosity | 42 L☉ |
| Temperature | 10,141 ± 290 K |
| Rotational velocity (v sin i) | 320 km/s |
| Other designations | |
| υ Gru, CD−39°14936, HD 218242, HIP 114132, HR 8790, SAO 214313. | |
| Database references | |
| SIMBAD | data |
υ Gruis, Latinised as Upsilon Gruis, is a double star in the southern constellation of Grus. The apparent magnitude is 5.61, which is bright enough to be viewed with the naked eye. Located around 87 parsecs (280 ly) distant, the white-hued primary is an A-type main-sequence star of spectral type A1V, a star that is currently fusing its core hydrogen. it is spinning rapidly with a projected rotational velocity of 320 km/s. The companion is a magnitude 8.24 star at an angular separation of 0.90″ from the primary along a position angle of 205°, as of 2009.