Star · K0 III/IV
HD 4917
HD 4917 is a giant star of spectral type K0 III/IV in the constellation Cetus, 653.9 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 3975 |
|---|---|
| Constellation | Cetus |
| Distance | 653.9 light-years (200.5 pc) |
| Apparent magnitude | magnitude 8.03 |
| Absolute magnitude | magnitude 1.52 |
| Spectral type | K0 III/IV |
| Surface temperature | 4,800 K |
| Luminosity | 28.6 L☉ |
| Radius | 5.01 R☉ |
| Mass | 1.32 M☉ |
| Metallicity [Fe/H] | 0.18 |
| Right ascension (J2000) | 0h 51m 06.3s |
| Declination (J2000) | −12° 55′ 39″ |
| Space velocity (relative to the Sun) | 29.3 km/s |
In the sky
Too faint for the naked eye (magnitude 8.03); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 77° N. South of latitude 77° S 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 1372. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around HD 4917, the Sun would look like a star of magnitude 11.34, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Planets
- HD 4917 b 401-day orbit · 13.5 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.