Star · K2
BD+37 3172
BD+37 3172 is a supergiant star of spectral type K2 in the constellation Lyra, 1,480 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Lyra |
|---|---|
| Distance | 1,480 light-years (453.8 pc) |
| Apparent magnitude | magnitude 9.29 |
| Absolute magnitude | magnitude 1.01 |
| Spectral type | K2 |
| Surface temperature | 4,500 K |
| Luminosity | 692 L☉ |
| Radius | 50.2 R☉ |
| Mass | 3.75 M☉ |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 18h 35m 15.7s |
| Declination (J2000) | +38° 06′ 55″ |
| Space velocity (relative to the Sun) | 59.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.29. Visible from the whole Northern Hemisphere and south to latitude 52° S. North of latitude 52° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 546. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 26 million years.
The Sun seen from there
From a planet around BD+37 3172, the Sun would look like a star of magnitude 13.11, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Planets
- BD+37 3172 b 1,890-day orbit · 12.4 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.