Star · G8 V

Copernicus

Copernicus is a main-sequence star of spectral type G8 V in the constellation Cancer, 41.1 light-years from the Sun. It is orbited by 5 confirmed exoplanet(s).

Other names	ρ¹ Cnc · 55 Cnc · Gl 324A · HIP 43587
Constellation	Cancer
Distance	41.1 light-years (12.6 pc)
Apparent magnitude	magnitude 5.96
Absolute magnitude	magnitude 5.46
Spectral type	G8 V
Surface temperature	5,200 K
Luminosity	0.635 L☉
Radius	0.98 R☉
Mass	1.02 M☉
Age	10.0 billion years
Metallicity [Fe/H]	0.39
Right ascension (J2000)	8h 52m 35.8s
Declination (J2000)	+28° 19′ 51″
Space velocity (relative to the Sun)	42.1 km/s

In the sky

Visible to the naked eye under a dark sky (apparent magnitude 5.96). 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 728 thousand years.

The Sun seen from there

From a planet around Copernicus, the Sun would look like a star of magnitude 5.33, in the direction where our sky has the constellation Microscopium. It would be visible to the naked eye.

Planets

55 Cnc e 0.737-day orbit · 1.88 R⊕
55 Cnc b 14.7-day orbit · 13.9 R⊕
55 Cnc c 44.4-day orbit · 8.51 R⊕
55 Cnc f 261-day orbit · 7.59 R⊕
55 Cnc d 4,800-day orbit · 13 R⊕

Neighbours

Its nearest neighbours in the catalogue (within 20 light-years):

55 Cnc B 0.11 light-years
Gl 316.1 8.26 light-years
2MASSI J0825196+211552 8.52 light-years
WISEA J083011.95+283716.0 8.71 light-years
Gl 359 8.98 light-years
Gl 356B 9.10 light-years
11 LMi 9.10 light-years
Gl 353 9.13 light-years

Open in the simulation

Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.