Star · A2IV
40 Sex
40 Sex is a subgiant star of spectral type A2IV in the constellation Sextans, 381.8 light-years from the Sun.
| Other names | HIP 52913 |
|---|---|
| Constellation | Sextans |
| Distance | 381.8 light-years (117.1 pc) |
| Apparent magnitude | magnitude 6.61 |
| Absolute magnitude | magnitude 1.27 |
| Spectral type | A2IV |
| Surface temperature | 8,080 K |
| Luminosity | 28.3 L☉ |
| Radius | 2.72 R☉ |
| Mass | 2.36 M☉ (estimated) |
| Right ascension (J2000) | 10h 49m 17.3s |
| Declination (J2000) | −4° 01′ 26″ |
| Space velocity (relative to the Sun) | 32.5 km/s |
In the sky
Too faint for the naked eye (magnitude 6.61); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 86° N. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1644. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.8 million years.
The Sun seen from there
From a planet around 40 Sex, the Sun would look like a star of magnitude 10.17, in the direction where our sky has the constellation Pegasus. 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.