Star · K5 III
BD+20 274
BD+20 274 is a supergiant star of spectral type K5 III in the constellation Pisces, 3,915 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Pisces |
|---|---|
| Distance | 3,915 light-years (1,200 pc) |
| Apparent magnitude | magnitude 9.52 |
| Absolute magnitude | magnitude −0.88 |
| Spectral type | K5 III |
| Surface temperature | 4,300 K |
| Luminosity | 91.2 L☉ |
| Radius | 17.3 R☉ |
| Mass | 0.8 M☉ |
| Metallicity [Fe/H] | -0.46 |
| Right ascension (J2000) | 1h 43m 40.9s |
| Declination (J2000) | +21° 00′ 19″ |
| Space velocity (relative to the Sun) | 22.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.52. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° 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 1890 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 69 million years.
The Sun seen from there
From a planet around BD+20 274, the Sun would look like a star of magnitude 15.23, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Planets
- BD+20 274 b 578-day orbit · 13 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.