Star · B2V
103 Tau
103 Tau is a main-sequence star of spectral type B2V in the constellation Taurus, 1,547 light-years from the Sun.
| Other names | HIP 23900 |
|---|---|
| Constellation | Taurus |
| Distance | 1,547 light-years (474.4 pc) |
| Apparent magnitude | magnitude 5.50 |
| Absolute magnitude | magnitude −2.88 |
| Spectral type | B2V |
| Surface temperature | 9,770 K |
| Luminosity | 1,610 L☉ |
| Radius | 14 R☉ |
| Mass | 7.49 M☉ (estimated) |
| Right ascension (J2000) | 5h 08m 06.6s |
| Declination (J2000) | +24° 15′ 55″ |
| Space velocity (relative to the Sun) | 20.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.50). 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 479. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 27 million years.
The Sun seen from there
From a planet around 103 Tau, the Sun would look like a star of magnitude 13.21, 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.