Star · M
GJ 4203A
GJ 4203A is a main-sequence star of spectral type M in the constellation Aquarius, 55.1 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 55.1 light-years (16.9 pc) |
| Apparent magnitude | magnitude 13.35 |
| Absolute magnitude | magnitude 12.21 |
| Spectral type | M |
| Surface temperature | 3,540 K |
| Luminosity | 0.00598 L☉ |
| Radius | 0.205 R☉ |
| Mass | 0.205 M☉ (estimated) |
| Right ascension (J2000) | 21h 33m 48.5s |
| Declination (J2000) | +1° 47′ 03″ |
| Space velocity (relative to the Sun) | 58.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.35. Visible from the whole Northern Hemisphere and south to latitude 88° S. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 977 thousand years.
The Sun seen from there
From a planet around GJ 4203A, the Sun would look like a star of magnitude 5.97, in the direction where our sky has the constellation Hydra. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- SDSS J212413.89+010000.3 3.16 light-years
- LSPM J2116+0234 4.97 light-years
- GJ 4204B 7.55 light-years
- GJ 4216 7.74 light-years
- GJ 4202 8.28 light-years
- 2MASS J21373742+0808463 8.35 light-years
- Gl 828.2 8.41 light-years
- Gl 824 8.54 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.