Star · F5IV
HIP 21459
HIP 21459 is a subgiant star of spectral type F5IV in the constellation Taurus, 142.1 light-years from the Sun.
| Constellation | Taurus |
|---|---|
| Distance | 142.1 light-years (43.6 pc) |
| Apparent magnitude | magnitude 6.01 |
| Absolute magnitude | magnitude 2.81 |
| Spectral type | F5IV |
| Surface temperature | 6,990 K |
| Luminosity | 6.37 L☉ |
| Radius | 1.72 R☉ |
| Mass | 1.59 M☉ (estimated) |
| Right ascension (J2000) | 4h 36m 29.1s |
| Declination (J2000) | +23° 20′ 27″ |
| Space velocity (relative to the Sun) | 46.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.01). Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1884. 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 HIP 21459, the Sun would look like a star of magnitude 8.03, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 21637 1.52 light-years
- HIP 21380 4.78 light-years
- WISEA J044105.56+213001.5 5.48 light-years
- HIP 21256 5.71 light-years
- CWISE J043941.41+202514.8 7.66 light-years
- HIP 20557 8.17 light-years
- HIP 22350 9.21 light-years
- κ² Tau 9.28 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.