Star · F5V
45 Boo
45 Boo is a main-sequence star of spectral type F5V in the constellation Boötes, 63.7 light-years from the Sun.
| Other names | Gl 578 · HIP 73996 |
|---|---|
| Constellation | Boötes |
| Distance | 63.7 light-years (19.5 pc) |
| Apparent magnitude | magnitude 4.93 |
| Absolute magnitude | magnitude 3.48 |
| Spectral type | F5V |
| Surface temperature | 6,730 K |
| Luminosity | 3.46 L☉ |
| Radius | 1.37 R☉ |
| Mass | 1.36 M☉ (estimated) |
| Right ascension (J2000) | 15h 07m 18.1s |
| Declination (J2000) | +24° 52′ 09″ |
| Space velocity (relative to the Sun) | 24.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.93). Visible from the whole Northern Hemisphere and south to latitude 65° S. North of latitude 65° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1962. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around 45 Boo, the Sun would look like a star of magnitude 6.28, in the direction where our sky has the constellation Fornax. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 579 1.64 light-years
- Gl 564 6.12 light-years
- η CrB 7.62 light-years
- HIP 75277 7.78 light-years
- 2MASSI J1526140+204341 7.95 light-years
- SDSS J151643.01+305344.4 8.22 light-years
- GJ 3913 8.47 light-years
- GJ 3878A 8.49 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.