Star · K1 III
HD 1690
HD 1690 is a supergiant star of spectral type K1 III in the constellation Cetus, 2,572 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 1692 |
|---|---|
| Constellation | Cetus |
| Distance | 2,572 light-years (788.7 pc) |
| Apparent magnitude | magnitude 9.19 |
| Absolute magnitude | magnitude −0.29 |
| Spectral type | K1 III |
| Surface temperature | 4,370 K |
| Luminosity | 33.1 L☉ |
| Radius | 21.7 R☉ |
| Mass | 1.86 M☉ |
| Age | 6.7 billion years |
| Metallicity [Fe/H] | -0.27 |
| Right ascension (J2000) | 0h 21m 13.3s |
| Declination (J2000) | −8° 16′ 52″ |
| Space velocity (relative to the Sun) | 54.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.19. Visible from the whole Southern Hemisphere and north to latitude 82° N. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 547 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 46 million years.
The Sun seen from there
From a planet around HD 1690, the Sun would look like a star of magnitude 14.31, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Planets
- HD 1690 b 533-day orbit · 12.5 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.