Star · G8III
99 Tau
99 Tau is a giant star of spectral type G8III in the constellation Taurus, 587.4 light-years from the Sun.
| Other names | HIP 23068 |
|---|---|
| Constellation | Taurus |
| Distance | 587.4 light-years (180.1 pc) |
| Apparent magnitude | magnitude 5.79 |
| Absolute magnitude | magnitude −0.49 |
| Spectral type | G8III |
| Surface temperature | 4,500 K |
| Luminosity | 246 L☉ |
| Radius | 25.9 R☉ |
| Mass | 4.38 M☉ (estimated) |
| Right ascension (J2000) | 4h 57m 48.6s |
| Declination (J2000) | +23° 56′ 55″ |
| Space velocity (relative to the Sun) | 13.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.79). Visible from the whole Northern Hemisphere and south to latitude 66° S. North of latitude 66° 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 1439. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 10 million years.
The Sun seen from there
From a planet around 99 Tau, the Sun would look like a star of magnitude 11.11, in the direction where our sky has the constellation Ophiuchus. 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.