Star · M4 V
Onkaria
Onkaria is a main-sequence star of spectral type M4 V in the constellation Ophiuchus, 47.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | GJ 1214 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 47.8 light-years (14.6 pc) |
| Apparent magnitude | magnitude 14.67 |
| Absolute magnitude | magnitude 13.84 |
| Spectral type | M4 V |
| Surface temperature | 3,100 K |
| Luminosity | 0.0039 L☉ |
| Radius | 0.216 R☉ |
| Mass | 0.182 M☉ |
| Age | 3.0 billion years |
| Metallicity [Fe/H] | 0.24 |
| Right ascension (J2000) | 17h 15m 18.7s |
| Declination (J2000) | +4° 57′ 41″ |
| Space velocity (relative to the Sun) | 65.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.67. Visible from the whole Northern Hemisphere and south to latitude 85° S. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1978. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 847 thousand years.
The Sun seen from there
From a planet around Onkaria, the Sun would look like a star of magnitude 5.66, in the direction where our sky has the constellation Orion. It would be visible to the naked eye.
Planets
- GJ 1214 b 1.58-day orbit · 2.73 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.