Star · M4
Gl 398
Gl 398 is a main-sequence star of spectral type M4 in the constellation Sextans, 49.8 light-years from the Sun.
| Constellation | Sextans |
|---|---|
| Distance | 49.8 light-years (15.3 pc) |
| Apparent magnitude | magnitude 12.60 |
| Absolute magnitude | magnitude 11.68 |
| Spectral type | M4 |
| Surface temperature | 3,650 K |
| Luminosity | 0.00822 L☉ |
| Radius | 0.227 R☉ |
| Mass | 0.235 M☉ (estimated) |
| Right ascension (J2000) | 10h 36m 01.9s |
| Declination (J2000) | +5° 07′ 15″ |
| Space velocity (relative to the Sun) | 52.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.60. Visible from the whole Northern Hemisphere and south to latitude 85° S. 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 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 884 thousand years.
The Sun seen from there
From a planet around Gl 398, the Sun would look like a star of magnitude 5.75, 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):
- SDSS J104842.84+011158.5 4.42 light-years
- ULAS J102940.52+093514.6 4.59 light-years
- GJ 3631 5.56 light-years
- GJ 3637 5.85 light-years
- SDSS J104335.08+121314.1 8.13 light-years
- GJ 3633 8.38 light-years
- ULAS J101243.54+102101.7 8.67 light-years
- 2MASSI J1045240-014957 8.79 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.