Star · A4IV
HIP 4709
HIP 4709 is a subgiant star of spectral type A4IV in the constellation Cassiopeia, 345.7 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 345.7 light-years (106.0 pc) |
| Apparent magnitude | magnitude 6.40 |
| Absolute magnitude | magnitude 1.27 |
| Spectral type | A4IV |
| Surface temperature | 8,700 K |
| Luminosity | 30.3 L☉ |
| Radius | 2.42 R☉ |
| Mass | 2.41 M☉ (estimated) |
| Right ascension (J2000) | 1h 00m 31.0s |
| Declination (J2000) | +70° 58′ 59″ |
| Space velocity (relative to the Sun) | 38.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.40). Visible from the whole Northern Hemisphere and south to latitude 19° S. North of latitude 19° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1680. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.1 million years.
The Sun seen from there
From a planet around HIP 4709, the Sun would look like a star of magnitude 9.96, in the direction where our sky has the constellation Musca. 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.