Star · K5
HD 233604
HD 233604 is a supergiant star of spectral type K5 in the constellation Ursa Major, 2,838 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Ursa Major |
|---|---|
| Distance | 2,838 light-years (870.2 pc) |
| Apparent magnitude | magnitude 10.41 |
| Absolute magnitude | magnitude 0.71 |
| Spectral type | K5 |
| Surface temperature | 4,790 K |
| Luminosity | 56.2 L☉ |
| Radius | 10.9 R☉ |
| Mass | 1.5 M☉ |
| Age | 2.4 billion years |
| Metallicity [Fe/H] | -0.36 |
| Right ascension (J2000) | 9h 09m 48.8s |
| Declination (J2000) | +53° 34′ 06″ |
| Space velocity (relative to the Sun) | 110.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.41. Visible from the whole Northern Hemisphere and south to latitude 36° S. North of latitude 36° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 813 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 50 million years.
The Sun seen from there
From a planet around HD 233604, the Sun would look like a star of magnitude 14.53, in the direction where our sky has the constellation Indus. It would be invisible to the naked eye.
Planets
- HD 233604 b 192-day orbit · 12.7 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.