Star · F8V
4 Equ
4 Equ is a main-sequence star of spectral type F8V in the constellation Equuleus, 146.3 light-years from the Sun.
| Other names | HIP 104101 |
|---|---|
| Constellation | Equuleus |
| Distance | 146.3 light-years (44.8 pc) |
| Apparent magnitude | magnitude 5.94 |
| Absolute magnitude | magnitude 2.68 |
| Spectral type | F8V |
| Surface temperature | 6,220 K |
| Luminosity | 7.39 L☉ |
| Radius | 2.34 R☉ |
| Mass | 1.65 M☉ (estimated) |
| Right ascension (J2000) | 21h 05m 26.7s |
| Declination (J2000) | +5° 57′ 29″ |
| Space velocity (relative to the Sun) | 41.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.94). Visible from the whole Northern Hemisphere and south to latitude 84° 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 1880. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around 4 Equ, the Sun would look like a star of magnitude 8.09, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- PSO J316.5156+04.1173 4.75 light-years
- HIP 104075 5.16 light-years
- HIP 105202 12.5 light-years
- HIP 102923 13.2 light-years
- HIP 103611 14.3 light-years
- HIP 104759 14.8 light-years
- Gl 828.4 18.6 light-years
- ULAS J211616.26-010124.3 19.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.