Star · A7V
HIP 20156
HIP 20156 is a main-sequence star of spectral type A7V in the constellation Perseus, 259.0 light-years from the Sun.
| Constellation | Perseus |
|---|---|
| Distance | 259.0 light-years (79.4 pc) |
| Apparent magnitude | magnitude 5.46 |
| Absolute magnitude | magnitude 0.96 |
| Spectral type | A7V |
| Surface temperature | 7,900 K |
| Luminosity | 36.9 L☉ |
| Radius | 3.24 R☉ |
| Mass | 2.55 M☉ (estimated) |
| Right ascension (J2000) | 4h 19m 13.2s |
| Declination (J2000) | +50° 02′ 55″ |
| Space velocity (relative to the Sun) | 32.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.46). Visible from the whole Northern Hemisphere and south to latitude 40° S. North of latitude 40° 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 1767. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around HIP 20156, the Sun would look like a star of magnitude 9.33, in the direction where our sky has the constellation Norma. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 19134 16.5 light-years
- HIP 20332 16.8 light-years
- HIP 19949 18.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.