Proxima Centauri b

Exoplanet, rocky planet

Star: Proxima Centauri

Distance from the star: 0.05 AU

Orbit around star: 11.18427 days

Basic characteristic

Mass: 1.2 M Earth

Size: 1.1 R Earth | 0.1 R Jupiter

Density: 4859 kg/m3 | 88 % Earth

Temperature: 234 K | -39 °C

Year of discovery: 2016 (radial velocity)

Other designations of this exoplanet
Alpha Centauri C b, CCDM J14396-6050C b, GCTP 3278.00 b, Gliese 551 b, HIP 70890 b, LFT 1110 b, LHS 49 b, LPM 526 b, LTT 5721 b, NLTT 37460 b, V645 Centauri b

Comparison

When comparing to the Solar system planets, Proxima Centauri b has 1.17 times the mass of Earth and it orbits its star closer than Mercury orbits the Sun.

	Mercury	Venus	Earth	Mars	Jupiter	Saturn	Uranus	Neptune
Mass	21.33	1.44	1.17	10.66	0	0.01	0.08	0.07
Size	2.87	1.16	1.1	2.08	0.1	0.12	0.28	0.29
Density	0.9	0.93	0.88	1.19	3.91	6.98	3.86	2.81
Distance	0.13	0.07	0.05	0.03	0.01	0.01	0	0
Temperature	0.53	0.32	0.81	1.13	1.44	1.76	3	3.25

Proxima Centauri system structure

Exoplanet Proxima Centauri b orbits star Proxima Centauri, which has much lower mass than Sun. It is one of 3 known exoplanets orbiting this star.

Proxima Centauri		8700 AU
	Proxima Centauri d unconfirmed	0.03 AU	0.3 M⊕		5.2 days
	Proxima Centauri b	0.05 AU	1.2 M⊕	1.1 R⊕	11.2 days
	Proxima Centauri c	1.48 AU	7.8 M⊕		1928 days