Star · M
GJ 3721
GJ 3721 is a main-sequence star of spectral type M in the constellation Coma Berenices, 90.8 light-years from the Sun.
| Other names | HIP 60343 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 90.8 light-years (27.8 pc) |
| Apparent magnitude | magnitude 11.35 |
| Absolute magnitude | magnitude 9.13 |
| Spectral type | M |
| Surface temperature | 4,030 K |
| Luminosity | 0.0527 L☉ |
| Radius | 0.47 R☉ |
| Mass | 0.479 M☉ (estimated) |
| Right ascension (J2000) | 12h 22m 21.3s |
| Declination (J2000) | +25° 10′ 12″ |
| Space velocity (relative to the Sun) | 98.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.35. Visible from the whole Northern Hemisphere and south to latitude 65° S. North of latitude 65° 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 1935. 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 GJ 3721, the Sun would look like a star of magnitude 7.05, in the direction where our sky has the constellation Sculptor. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3717 3.51 light-years
- GJ 3725A 3.68 light-years
- GJ 3726C 5.28 light-years
- HIP 60448 7.10 light-years
- HIP 60357 7.23 light-years
- GJ 3720 7.66 light-years
- SDSS J120602.51+281328.7 9.26 light-years
- HIP 61099 9.60 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.