Star · K1 V(P)
HD 103197
HD 103197 is a main-sequence star of spectral type K1 V(P) in the constellation Centaurus, 185.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 57931 |
|---|---|
| Constellation | Centaurus |
| Distance | 185.8 light-years (57.0 pc) |
| Apparent magnitude | magnitude 9.40 |
| Absolute magnitude | magnitude 5.62 |
| Spectral type | K1 V(P) |
| Surface temperature | 5,250 K |
| Luminosity | 0.47 L☉ |
| Radius | 0.88 R☉ |
| Mass | 0.8 M☉ |
| Age | 9.1 billion years |
| Metallicity [Fe/H] | 0.22 |
| Right ascension (J2000) | 11h 52m 53.0s |
| Declination (J2000) | −50° 17′ 34″ |
| Space velocity (relative to the Sun) | 22.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.40. Visible from the whole Southern Hemisphere and north to latitude 40° N. South of latitude 40° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1840. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.3 million years.
The Sun seen from there
From a planet around HD 103197, the Sun would look like a star of magnitude 8.61, in the direction where our sky has the constellation Cassiopeia. It would be invisible to the naked eye.
Planets
- HD 103197 b 47.8-day orbit · 5.83 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.