Star · M3.5 V
LTT 3780
LTT 3780 is a main-sequence star of spectral type M3.5 V in the constellation Hydra, 71.9 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Hydra |
|---|---|
| Distance | 71.9 light-years (22.0 pc) |
| Apparent magnitude | magnitude 13.10 |
| Absolute magnitude | magnitude 11.38 |
| Spectral type | M3.5 V |
| Surface temperature | 3,360 K |
| Luminosity | 0.0165 L☉ |
| Radius | 0.38 R☉ |
| Mass | 0.381 M☉ |
| Age | 3.1 billion years |
| Metallicity [Fe/H] | 0.06 |
| Right ascension (J2000) | 10h 18m 34.8s |
| Declination (J2000) | −11° 43′ 04″ |
| Space velocity (relative to the Sun) | 44.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.10. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1954. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around LTT 3780, the Sun would look like a star of magnitude 6.55, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Planets
- LTT 3780 b 0.768-day orbit · 1.33 R⊕
- LTT 3780 c 12.3-day orbit · 2.39 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 49366 6.00 light-years
- WISE J103907.73-160002.9 8.26 light-years
- HIP 52369 9.98 light-years
- DENIS J1004403-131818 10.1 light-years
- Gl 398.1 10.7 light-years
- CWISE J095316.32-094318.9 10.7 light-years
- 2MASS J09490860-1545485 12.0 light-years
- GJ 3581 12.7 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.