Star · G7III
θ¹ Tau
θ¹ Tau is a giant star of spectral type G7III in the constellation Taurus, 131.7 light-years from the Sun.
| Other names | HIP 20885 |
|---|---|
| Constellation | Taurus |
| Distance | 131.7 light-years (40.4 pc) |
| Apparent magnitude | magnitude 3.84 |
| Absolute magnitude | magnitude 0.81 |
| Spectral type | G7III |
| Surface temperature | 4,860 K |
| Luminosity | 59.6 L☉ |
| Radius | 10.9 R☉ |
| Mass | 2.92 M☉ (estimated) |
| Right ascension (J2000) | 4h 28m 34.5s |
| Declination (J2000) | +15° 57′ 44″ |
| Space velocity (relative to the Sun) | 48.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.84). 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 November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1894. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around θ¹ Tau, the Sun would look like a star of magnitude 7.86, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 20485 4.53 light-years
- CFHT-Hy-21 4.58 light-years
- HIP 21543 6.88 light-years
- HIP 20679 7.61 light-years
- HIP 20745 8.36 light-years
- HIP 20086 8.74 light-years
- HIP 20719 10.0 light-years
- HIP 20527 10.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.