Star · M4
Ross 128
Ross 128 is a main-sequence star of spectral type M4 in the constellation Virgo, 11.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | Gl 447 · HIP 57548 |
|---|---|
| Constellation | Virgo |
| Distance | 11.0 light-years (3.37 pc) |
| Apparent magnitude | magnitude 11.12 |
| Absolute magnitude | magnitude 13.48 |
| Spectral type | M4 |
| Surface temperature | 3,190 K |
| Luminosity | 0.00362 L☉ |
| Radius | 0.197 R☉ |
| Mass | 0.168 M☉ |
| Age | 5.0 billion years |
| Metallicity [Fe/H] | -0.02 |
| Right ascension (J2000) | 11h 47m 44.5s |
| Declination (J2000) | +0° 48′ 17″ |
| Space velocity (relative to the Sun) | 38.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.12. Visible from the whole Northern Hemisphere and south to latitude 89° S. 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 2015. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 195 thousand years.
The Sun seen from there
From a planet around Ross 128, the Sun would look like a star of magnitude 2.47, in the direction where our sky has the constellation Pisces. It would be visible to the naked eye.
Planets
- Ross 128 b 9.87-day orbit · 1.11 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Wolf 359 3.90 light-years
- Gl 473A 4.34 light-years
- Gl 473B 4.73 light-years
- GJ 3622 5.75 light-years
- Lalande 21185 6.59 light-years
- WISE J085510.83-071442.5 7.63 light-years
- Gl 388 8.42 light-years
- Luhman 16 9.07 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.