Star · M5
GJ 3730
GJ 3730 is a main-sequence star of spectral type M5 in the constellation Coma Berenices, 74.0 light-years from the Sun.
| Constellation | Coma Berenices |
|---|---|
| Distance | 74.0 light-years (22.7 pc) |
| Apparent magnitude | magnitude 14.18 |
| Absolute magnitude | magnitude 12.40 |
| Spectral type | M5 |
| Surface temperature | 3,650 K |
| Luminosity | 0.00423 L☉ |
| Radius | 0.163 R☉ |
| Mass | 0.176 M☉ (estimated) |
| Right ascension (J2000) | 12h 29m 27.7s |
| Declination (J2000) | +22° 59′ 48″ |
| Space velocity (relative to the Sun) | 18.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.18. Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N 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 1952. 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 GJ 3730, the Sun would look like a star of magnitude 6.61, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- CWISE J123228.86+225714.5 2.40 light-years
- GJ 3724 2.61 light-years
- GJ 3734 3.52 light-years
- GJ 3739 4.66 light-years
- GJ 1163 5.01 light-years
- CWISE J121557.87+270154.2 6.66 light-years
- GJ 9404 8.64 light-years
- GJ 1166A 10.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.