Blue-white subgiant · Tucana
ε Tucanae
Also known as: ε Tuc, HIP 118322
mag 4.5370 light-years
About
ε Tucanae is a blue-white subgiant of magnitude 4.5 in Tucana, about 370 light-years away.
How to find it
- ε Tucanae is in the constellation Tucana.
- Best evenings: around early November it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
- Where on Earth: it is seen well, at least 10° up, from south of 14° N.
When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.
What you will see
- EyesVisible from the suburbs on a clear night, but lost in bright city skies.
- Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
- Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.
Stars look the same in any instrument: brighter and sharper, but never bigger.
Facts
| Designation | ε Tucanae (ε Tuc) |
|---|---|
| Hipparcos number | HIP 118322 |
| Type | Blue-white subgiant |
| Spectral type | B9IV |
| Colour | WhiteB−V colour index −0.07 |
| Magnitude | 4.5The smaller the number, the brighter. |
| Distance | 370 light-yearsThe light you see left it around 1650. |
| Proper motion | 0.053″ per year across the sky |
| Constellation | Tucana |
| Right ascension (J2000) | 23h 59m 54.9s |
| Declination (J2000) | −65° 34′ 38″ |
Sources and credits
Star data: HYG Database by David Nash, CC BY-SA 4.0. All data sources →