Star · M0
Gl 819B
Gl 819B is a main-sequence star of spectral type M0 in the constellation Aquarius, 56.6 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 56.6 light-years (17.4 pc) |
| Apparent magnitude | magnitude 10.20 |
| Absolute magnitude | magnitude 9.00 |
| Spectral type | M0 |
| Surface temperature | 3,820 K |
| Luminosity | 0.076 L☉ |
| Radius | 0.629 R☉ |
| Mass | 0.525 M☉ (estimated) |
| Right ascension (J2000) | 21h 07m 10.2s |
| Declination (J2000) | −13° 55′ 27″ |
| Space velocity (relative to the Sun) | 43.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.20. Visible from the whole Southern Hemisphere and north to latitude 76° N. South of latitude 76° S it never sets. 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 1969. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around Gl 819B, the Sun would look like a star of magnitude 6.03, in the direction where our sky has the constellation Cancer. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 819A 0.07 light-years
- 2MASSI J2104149-103736 3.34 light-years
- Gl 817 4.40 light-years
- WISEA J211456.86-180519.0 4.62 light-years
- Gl 811.1 5.73 light-years
- Gl 830 5.85 light-years
- Gl 826.1 8.16 light-years
- Gl 828.2 8.60 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.