Star · A2V
σ And
σ And is a main-sequence star of spectral type A2V in the constellation Andromeda, 140.3 light-years from the Sun.
| Other names | HIP 1473 |
|---|---|
| Constellation | Andromeda |
| Distance | 140.3 light-years (43.0 pc) |
| Apparent magnitude | magnitude 4.51 |
| Absolute magnitude | magnitude 1.34 |
| Spectral type | A2V |
| Surface temperature | 9,500 K |
| Luminosity | 31.7 L☉ |
| Radius | 2.08 R☉ |
| Mass | 2.44 M☉ (estimated) |
| Right ascension (J2000) | 0h 18m 19.7s |
| Declination (J2000) | +36° 47′ 07″ |
| Space velocity (relative to the Sun) | 18.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.51). Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1886. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around σ And, the Sun would look like a star of magnitude 8.00, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 74 9.45 light-years
- HIP 118251 15.3 light-years
- HIP 118254 15.4 light-years
- 2MASSW J0030438+313932 15.9 light-years
- 2MASS J00150673+3006004 17.3 light-years
- HIP 1294 18.0 light-years
- HIP 2102 18.5 light-years
- HIP 4127 18.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.