Star · A7V
79 Tau
79 Tau is a main-sequence star of spectral type A7V in the constellation Taurus, 157.4 light-years from the Sun.
| Other names | HIP 20901 |
|---|---|
| Constellation | Taurus |
| Distance | 157.4 light-years (48.3 pc) |
| Apparent magnitude | magnitude 5.02 |
| Absolute magnitude | magnitude 1.60 |
| Spectral type | A7V |
| Surface temperature | 8,050 K |
| Luminosity | 20.8 L☉ |
| Radius | 2.34 R☉ |
| Mass | 2.16 M☉ (estimated) |
| Right ascension (J2000) | 4h 28m 50.2s |
| Declination (J2000) | +13° 02′ 51″ |
| Space velocity (relative to the Sun) | 40.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.02). Visible from the whole Northern Hemisphere and south to latitude 77° S. North of latitude 77° 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 1869. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around 79 Tau, the Sun would look like a star of magnitude 8.25, 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 20762 1.69 light-years
- HIP 20850 2.60 light-years
- HIP 21112 4.53 light-years
- HIP 20827 4.78 light-years
- HIP 21179 5.12 light-years
- HIP 20553 5.70 light-years
- 83 Tau 6.08 light-years
- HIP 20357 6.13 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.