Star · G2
Buna
Buna is a main-sequence star of spectral type G2 in the constellation Andromeda, 195.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HD 16175 · HIP 12191 |
|---|---|
| Constellation | Andromeda |
| Distance | 195.7 light-years (60.0 pc) |
| Apparent magnitude | magnitude 7.28 |
| Absolute magnitude | magnitude 3.39 |
| Spectral type | G2 |
| Surface temperature | 5,980 K |
| Luminosity | 3.22 L☉ |
| Radius | 1.72 R☉ |
| Mass | 1.63 M☉ |
| Age | 3.3 billion years |
| Metallicity [Fe/H] | 0.30 |
| Right ascension (J2000) | 2h 37m 01.9s |
| Declination (J2000) | +42° 03′ 45″ |
| Space velocity (relative to the Sun) | 27.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.28); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 48° S. North of latitude 48° 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 the year 1830. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around Buna, the Sun would look like a star of magnitude 8.72, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Planets
- HD 16175 b 990-day orbit · 12.8 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.