Star · B9V
Arkab Prior
Arkab Prior is a main-sequence star of spectral type B9V in the constellation Sagittarius, 389.3 light-years from the Sun.
| Other names | β¹ Sgr · HIP 95241 |
|---|---|
| Constellation | Sagittarius |
| Distance | 389.3 light-years (119.4 pc) |
| Apparent magnitude | magnitude 3.96 |
| Absolute magnitude | magnitude −1.42 |
| Spectral type | B9V |
| Surface temperature | 11,330 K |
| Luminosity | 542 L☉ |
| Radius | 6.05 R☉ |
| Mass | 5.49 M☉ (estimated) |
| Right ascension (J2000) | 19h 22m 38.3s |
| Declination (J2000) | −44° 27′ 32″ |
| Space velocity (relative to the Sun) | 14.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.96). Visible from the whole Southern Hemisphere and north to latitude 46° N. South of latitude 46° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1637. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.9 million years.
The Sun seen from there
From a planet around Arkab Prior, the Sun would look like a star of magnitude 10.21, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.