Star · F8
HD 28109
HD 28109 is a main-sequence star of spectral type F8 in the constellation Hydrus, 457.4 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Other names | HIP 20295 |
|---|---|
| Constellation | Hydrus |
| Distance | 457.4 light-years (140.2 pc) |
| Apparent magnitude | magnitude 9.42 |
| Absolute magnitude | magnitude 3.69 |
| Spectral type | F8 |
| Surface temperature | 6,190 K |
| Luminosity | 2.71 L☉ |
| Radius | 1.43 R☉ |
| Mass | 1.23 M☉ |
| Age | 3.2 billion years |
| Metallicity [Fe/H] | 0.10 |
| Right ascension (J2000) | 4h 20m 57.1s |
| Declination (J2000) | −68° 06′ 10″ |
| Space velocity (relative to the Sun) | 16.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.42. Visible from the whole Southern Hemisphere and north to latitude 22° N. South of latitude 22° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1569. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8.1 million years.
The Sun seen from there
From a planet around HD 28109, the Sun would look like a star of magnitude 10.56, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Planets
- HD 28109 b 22.9-day orbit · 2.69 R⊕
- HD 28109 c 56-day orbit · 4.13 R⊕
- HD 28109 d 84.3-day orbit · 3.11 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.