Star · G2IV
HIP 104788
HIP 104788 is a subgiant star of spectral type G2IV in the constellation Cepheus, 139.4 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 139.4 light-years (42.8 pc) |
| Apparent magnitude | magnitude 6.38 |
| Absolute magnitude | magnitude 3.23 |
| Spectral type | G2IV |
| Surface temperature | 5,870 K |
| Luminosity | 4.68 L☉ |
| Radius | 2.09 R☉ |
| Mass | 1.47 M☉ (estimated) |
| Right ascension (J2000) | 21h 13m 42.5s |
| Declination (J2000) | +64° 24′ 14″ |
| Space velocity (relative to the Sun) | 37.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.38). Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 1887. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around HIP 104788, the Sun would look like a star of magnitude 7.98, 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):
- HIP 107233 8.76 light-years
- HIP 105992 9.14 light-years
- 4 Cep 9.56 light-years
- θ Cep 12.3 light-years
- TOI-1759 12.9 light-years
- HIP 108110 16.1 light-years
- 2MASS J22114470+6856262 19.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.