Alpha Centauri Bc

Alpha Centauri Bc

Exoplanet		List of exoplanets Size comparison Earth Alpha Centauri Bc
Parent star
Star		Alpha Centauri B
Constellation		Centaurus
Right ascension	(α)	14h 39m 35.0803s
Declination	(δ)	-60° 50′ 13.761″
Apparent magnitude	(mV)	+1.33
Distance		4.366 ± 0.007 ly (1.339 ± 0.002 pc)
Spectral type		K1 V
Mass	(m)	0.907 M☉
Radius	(r)	0.865 R☉
Temperature	(T)	5260 K
Metallicity	[Fe/H]	160%
Age		6 ± 1 Gyr
Physical characteristics
Radius	(r)	0.92±0.06[1] R⊕
Orbital elements
Semi-major axis	(a)	0.10[1] AU
Eccentricity	(e)	<0.24[1]
Orbital period	(P)	12.4[1] d
Discovery information
Discovery date		2013
Discoverer(s)		Demory et al.[1]
Discovery method		Transit[1]
Discovery status		Unconfirmed

Alpha Centauri Bc is a suspected exoplanet orbiting Alpha Centauri B, part of Alpha Centauri system, the closest system to our own. It is located about 4.4 light-years away and is not in the habitable zone. It was first announced in 2013, and was the second proposed exoplanet in the system, after Alpha Centauri Bb. It would have an orbital period of approximately 12 Earth days, longer than that of Bb, now proven to not exist, and far smaller than that of Mercury.^[1][2]

References

1. LePage, Andrew (March 28, 2015). "Has Another Planet Been Found Orbiting Alpha Centauri B?". Drew ex Machina. Retrieved September 5, 2015.
2. Aron, Jacob (March 28, 2015). "Twin Earths may lurk in our nearest star system". New Scientist. Reed Business Information, Ltd. Retrieved September 5, 2015.