Star · K1III
Kaus Borealis
Kaus Borealis is a giant star of spectral type K1III in the constellation Sagittarius, 76.0 light-years from the Sun.
| Other names | λ Sgr · Gl 713.1 · HIP 90496 |
|---|---|
| Constellation | Sagittarius |
| Distance | 76.0 light-years (23.3 pc) |
| Apparent magnitude | magnitude 2.82 |
| Absolute magnitude | magnitude 0.98 |
| Spectral type | K1III |
| Surface temperature | 4,680 K |
| Luminosity | 56.1 L☉ |
| Radius | 11.4 R☉ |
| Mass | 2.87 M☉ (estimated) |
| Right ascension (J2000) | 18h 27m 58.3s |
| Declination (J2000) | −25° 25′ 18″ |
| Space velocity (relative to the Sun) | 48.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.82). Visible from the whole Southern Hemisphere and north to latitude 65° N. South of latitude 65° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1950. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around Kaus Borealis, the Sun would look like a star of magnitude 6.67, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- CWISE J185104.34-245232.1 8.33 light-years
- WISEA J190005.76-310810.9 12.0 light-years
- HIP 90611 13.3 light-years
- DENIS-P J1909081-193748 15.0 light-years
- HIP 93072 15.3 light-years
- GJ 4074 16.0 light-years
- Ascella 17.6 light-years
- HIP 92444 19.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.