Star · G2V
η CrB
η CrB is a main-sequence star of spectral type G2V in the constellation Corona Borealis, 58.3 light-years from the Sun.
| Other names | Gl 584A · HIP 75312 |
|---|---|
| Constellation | Corona Borealis |
| Distance | 58.3 light-years (17.9 pc) |
| Apparent magnitude | magnitude 4.99 |
| Absolute magnitude | magnitude 3.73 |
| Spectral type | G2V |
| Surface temperature | 6,060 K |
| Luminosity | 2.86 L☉ |
| Radius | 1.53 R☉ |
| Mass | 1.3 M☉ (estimated) |
| Right ascension (J2000) | 15h 23m 12.3s |
| Declination (J2000) | +30° 17′ 16″ |
| Space velocity (relative to the Sun) | 19.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.99). Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1968. 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 η CrB, the Sun would look like a star of magnitude 6.09, in the direction where our sky has the constellation Fornax. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- η CrB 2.47 light-years
- SDSS J152039.82+354619.8 5.67 light-years
- GJ 3923 6.67 light-years
- Gl 579 7.72 light-years
- GJ 3919 7.75 light-years
- WISE J152305.10+312537.6 8.11 light-years
- ρ CrB 8.71 light-years
- 45 Boo 8.77 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.