Star · A0
Izar
Izar is a supergiant star of spectral type A0 in the constellation Boötes, 235.9 light-years from the Sun.
| Other names | ε Boo · HIP 72105 |
|---|---|
| Constellation | Boötes |
| Distance | 235.9 light-years (72.3 pc) |
| Apparent magnitude | magnitude 2.35 |
| Absolute magnitude | magnitude −1.95 |
| Spectral type | A0 |
| Surface temperature | 4,830 K |
| Luminosity | 769 L☉ |
| Radius | 39.7 R☉ |
| Mass | 6.06 M☉ (estimated) |
| Right ascension (J2000) | 14h 44m 59.2s |
| Declination (J2000) | +27° 04′ 27″ |
| Space velocity (relative to the Sun) | 25.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.35). Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1790. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.2 million years.
The Sun seen from there
From a planet around Izar, the Sun would look like a star of magnitude 9.13, in the direction where our sky has the constellation Fornax. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 561 9.37 light-years
- HIP 71094 12.6 light-years
- HIP 70609 18.2 light-years
- 2MASSW J1449378+235537 18.4 light-years
- GJ 3872 18.8 light-years
- HIP 73178 19.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.