Star · M4.5 V
55 Cnc B
55 Cnc B is a main-sequence star of spectral type M4.5 V in the constellation Cancer, 40.9 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | Gl 324B |
|---|---|
| Constellation | Cancer |
| Distance | 40.9 light-years (12.6 pc) |
| Apparent magnitude | magnitude 13.14 |
| Absolute magnitude | magnitude 12.65 |
| Spectral type | M4.5 V |
| Surface temperature | 3,290 K |
| Luminosity | 0.0078 L☉ |
| Radius | 0.274 R☉ |
| Mass | 0.26 M☉ |
| Age | 10.0 billion years |
| Metallicity [Fe/H] | 0.16 |
| Right ascension (J2000) | 8h 52m 40.8s |
| Declination (J2000) | +28° 19′ 02″ |
| Space velocity (relative to the Sun) | 40.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.14. Visible from the whole Northern Hemisphere and south to latitude 62° S. North of latitude 62° 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 1985. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 726 thousand years.
The Sun seen from there
From a planet around 55 Cnc B, the Sun would look like a star of magnitude 5.32, in the direction where our sky has the constellation Microscopium. It would be visible to the naked eye.
Planets
- 55 Cnc B b 6.8-day orbit · 1.69 R⊕
- 55 Cnc B c 33.7-day orbit · 2.16 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Copernicus 0.11 light-years
- Gl 316.1 8.28 light-years
- 2MASSI J0825196+211552 8.45 light-years
- WISEA J083011.95+283716.0 8.61 light-years
- Gl 359 8.94 light-years
- Gl 356B 9.04 light-years
- 11 LMi 9.04 light-years
- Gl 353 9.16 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.