Star · B8III
129 Tau
129 Tau is a giant star of spectral type B8III in the constellation Taurus, 895.6 light-years from the Sun.
| Other names | HIP 27265 |
|---|---|
| Constellation | Taurus |
| Distance | 895.6 light-years (274.6 pc) |
| Apparent magnitude | magnitude 6.00 |
| Absolute magnitude | magnitude −1.19 |
| Spectral type | B8III |
| Surface temperature | 10,960 K |
| Luminosity | 412 L☉ |
| Radius | 5.64 R☉ |
| Mass | 5.08 M☉ (estimated) |
| Right ascension (J2000) | 5h 46m 45.5s |
| Declination (J2000) | +15° 49′ 21″ |
| Space velocity (relative to the Sun) | 23.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.00). Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1130. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
The Sun seen from there
From a planet around 129 Tau, the Sun would look like a star of magnitude 12.02, in the direction where our sky has the constellation Serpens. 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.