Star · M2.5
GJ 3634
GJ 3634 is a main-sequence star of spectral type M2.5 in the constellation Hydra, 66.5 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Hydra |
|---|---|
| Distance | 66.5 light-years (20.4 pc) |
| Apparent magnitude | magnitude 11.95 |
| Absolute magnitude | magnitude 10.40 |
| Spectral type | M2.5 |
| Surface temperature | 3,520 K |
| Luminosity | 0.02 L☉ |
| Radius | 0.43 R☉ |
| Mass | 0.45 M☉ |
| Age | 5.0 billion years |
| Right ascension (J2000) | 10h 58m 34.9s |
| Declination (J2000) | −31° 08′ 37″ |
| Space velocity (relative to the Sun) | 55.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.95. Visible from the whole Southern Hemisphere and north to latitude 59° N. South of latitude 59° S it never sets. 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 1959. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around GJ 3634, the Sun would look like a star of magnitude 6.38, in the direction where our sky has the constellation Pegasus. It would be visible to the naked eye.
Planets
- GJ 3634 b 2.65-day orbit · 2.83 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.