Star · ?
Gl 828.5
Gl 828.5 is a white dwarf of spectral type ? in the constellation Cepheus, 72.5 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 72.5 light-years (22.2 pc) |
| Apparent magnitude | magnitude 12.80 |
| Absolute magnitude | magnitude 11.07 |
| Spectral type | ? |
| Surface temperature | 9,880 K |
| Luminosity | 0.00434 L☉ |
| Radius | 0.012 R☉ |
| Mass | 0.6 M☉ (estimated) |
| Right ascension (J2000) | 21h 26m 57.7s |
| Declination (J2000) | +73° 38′ 45″ |
| Space velocity (relative to the Sun) | 34.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.80. Visible from the whole Northern Hemisphere and south to latitude 16° S. North of latitude 16° N 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 1954. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around Gl 828.5, the Sun would look like a star of magnitude 6.56, in the direction where our sky has the constellation Carina. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 842.2 3.73 light-years
- GJ 1266 6.24 light-years
- GJ 4170 6.68 light-years
- WISE J213512.63+731236.8 6.83 light-years
- CWISE J201221.32+701740.2 8.75 light-years
- TOI-6324 9.93 light-years
- HIP 109980 10.5 light-years
- GJ 4120 10.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.