Star · A8V
σ¹ Cnc
σ¹ Cnc is a main-sequence star of spectral type A8V in the constellation Cancer, 221.4 light-years from the Sun.
| Other names | HIP 43584 |
|---|---|
| Constellation | Cancer |
| Distance | 221.4 light-years (67.9 pc) |
| Apparent magnitude | magnitude 5.67 |
| Absolute magnitude | magnitude 1.51 |
| Spectral type | A8V |
| Surface temperature | 7,980 K |
| Luminosity | 22.4 L☉ |
| Radius | 2.48 R☉ |
| Mass | 2.21 M☉ (estimated) |
| Right ascension (J2000) | 8h 52m 34.6s |
| Declination (J2000) | +32° 28′ 27″ |
| Space velocity (relative to the Sun) | 12.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.67). Visible from the whole Northern Hemisphere and south to latitude 58° S. North of latitude 58° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1805. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.9 million years.
The Sun seen from there
From a planet around σ¹ Cnc, the Sun would look like a star of magnitude 8.99, in the direction where our sky has the constellation Microscopium. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 44118 5.98 light-years
- PSO J135.0395+32.0845 13.5 light-years
- HIP 44330 16.2 light-years
- HIP 44169 18.7 light-years
- HIP 42976 20.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.