Star · M0V
K2-129
K2-129 is a main-sequence star of spectral type M0V in the constellation Sagittarius, 90.2 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sagittarius |
|---|---|
| Distance | 90.2 light-years (27.7 pc) |
| Apparent magnitude | magnitude 13.65 |
| Absolute magnitude | magnitude 11.44 |
| Spectral type | M0V |
| Surface temperature | 3,460 K |
| Luminosity | 0.0148 L☉ |
| Radius | 0.36 R☉ |
| Mass | 0.36 M☉ |
| Right ascension (J2000) | 19h 16m 35.7s |
| Declination (J2000) | −25° 38′ 47″ |
| Space velocity (relative to the Sun) | 41.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.65. Visible from the whole Southern Hemisphere and north to latitude 64° N. South of latitude 64° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1936. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around K2-129, the Sun would look like a star of magnitude 7.04, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Planets
- K2-129 b 8.24-day orbit · 1.04 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gumala 2.36 light-years
- Gl 757 6.33 light-years
- HIP 96124 6.80 light-years
- Ascella 8.40 light-years
- GJ 4097 10.3 light-years
- HIP 94595 10.9 light-years
- HIP 93072 13.5 light-years
- WISE J195500.42-254013.9 13.7 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.