Star · A
HIP 42540
HIP 42540 is a main-sequence star of spectral type A in the constellation Vela, 247.1 light-years from the Sun.
| Constellation | Vela |
|---|---|
| Distance | 247.1 light-years (75.8 pc) |
| Apparent magnitude | magnitude 5.20 |
| Absolute magnitude | magnitude 0.80 |
| Spectral type | A |
| Surface temperature | 10,480 K |
| Luminosity | 60.7 L☉ |
| Radius | 2.37 R☉ |
| Mass | 2.94 M☉ (estimated) |
| Right ascension (J2000) | 8h 40m 19.2s |
| Declination (J2000) | −40° 15′ 50″ |
| Space velocity (relative to the Sun) | 29.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.20). Visible from the whole Southern Hemisphere and north to latitude 50° N. South of latitude 50° S it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1779. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around HIP 42540, the Sun would look like a star of magnitude 9.23, in the direction where our sky has the constellation Cygnus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.