Star · M4.0 V
HN Lib
HN Lib is a main-sequence star of spectral type M4.0 V in the constellation Libra, 20.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | Gl 555 · HIP 71253 |
|---|---|
| Constellation | Libra |
| Distance | 20.4 light-years (6.25 pc) |
| Apparent magnitude | magnitude 11.32 |
| Absolute magnitude | magnitude 12.34 |
| Spectral type | M4.0 V |
| Surface temperature | 3,350 K |
| Luminosity | 0.0101 L☉ |
| Radius | 0.299 R☉ |
| Mass | 0.291 M☉ |
| Age | 4.4 billion years |
| Metallicity [Fe/H] | -0.18 |
| Right ascension (J2000) | 14h 34m 16.9s |
| Declination (J2000) | −12° 31′ 14″ |
| Space velocity (relative to the Sun) | 20.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.32. Visible from the whole Southern Hemisphere and north to latitude 77° N. South of latitude 77° S it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 2006. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 362 thousand years.
The Sun seen from there
From a planet around HN Lib, the Sun would look like a star of magnitude 3.81, in the direction where our sky has the constellation Aries. It would be visible to the naked eye.
Planets
- HN Lib b 36.1-day orbit · 2.2 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 570B 3.78 light-years
- Gl 570A 3.81 light-years
- GJ 581 4.32 light-years
- 2MASSW J1507476-162738 5.14 light-years
- WISEPA J154151.66-225025.2 6.68 light-years
- GJ 3877 6.74 light-years
- Gl 526 10.2 light-years
- Wolf 1061 10.4 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.