Star · M3
Gl 403
Gl 403 is a main-sequence star of spectral type M3 in the constellation Leo, 43.2 light-years from the Sun.
| Constellation | Leo |
|---|---|
| Distance | 43.2 light-years (13.2 pc) |
| Apparent magnitude | magnitude 12.67 |
| Absolute magnitude | magnitude 12.06 |
| Spectral type | M3 |
| Surface temperature | 3,580 K |
| Luminosity | 0.00644 L☉ |
| Radius | 0.209 R☉ |
| Mass | 0.211 M☉ (estimated) |
| Right ascension (J2000) | 10h 52m 05.1s |
| Declination (J2000) | +13° 59′ 56″ |
| Space velocity (relative to the Sun) | 71.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.67. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° 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 1983. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 766 thousand years.
The Sun seen from there
From a planet around Gl 403, the Sun would look like a star of magnitude 5.44, in the direction where our sky has the constellation Aquarius. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- CWISEP J102201.27+145520.2 5.52 light-years
- GJ 3631 6.63 light-years
- ULAS J102940.52+093514.6 7.11 light-years
- Gl 410 7.34 light-years
- GJ 3666 7.40 light-years
- Gl 427 9.66 light-years
- WISE J102557.72+030755.7 9.92 light-years
- 2MASSI J1047538+212423 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.