GJ 1132 is a small red dwarf star away from
Earth in the constellation
Vela. In 2015, it was revealed to have a hot rocky Earth-sized planet orbiting it every 1.6 days.
In 2018, a second planet and a potential third were revealed.
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Planetary system
As of June 12, 2018, there are two confirmed exoplanets and one candidate exoplanet orbiting GJ 1132.
GJ 1132 b
GJ 1132 b is the innermost planet of the GJ 1132 system, as well as the smallest. It is very similar in size and mass to Earth, with a radius of 1.13 and a mass of 1.66 . It is slightly denser than Earth with 30% more surface gravity, meaning it has a rocky composition.[ Despite its physical similarities to Earth, it is considered too hot to be habitable, getting 19 times more sunlight due to its 1.6 day orbital period. , it remains unclear whether the planet has an atmosphere, with some studies finding evidence for an atmosphere,]
GJ 1132 c
GJ 1132 c was reported by Bonfils and colleagues using the HARPS
The High Accuracy Radial Velocity Planet Searcher (HARPS) is a high-precision echelle planet-finding spectrograph installed in 2002 on the ESO's 3.6m telescope at La Silla Observatory in Chile. The first light was achieved in February 2003. H ...
spectrograph on the ESO 3.6 m Telescope at the La Silla Observatory in Chile in June 2018. No transits of the planet were found, but it has a minimum mass of about 2.6 and gets 1.9 times the amount of sunlight as Earth with an equilibrium temperature of . It orbits outside the inner limit of GJ 1132's habitable zone (which ends at 1.6 times the stellar flux of Earth), but because the exact characteristics of the planet's atmosphere are unknown, it has been mentioned that it could still be potentially habitable. However, with a lack of transits, determining its atmospheric characteristics will be extremely difficult.[
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GJ 1132 d
An unconfirmed cold super-Earth candidate was also detected, with a minimum mass of about 8.4 and a low equilibrium temperature of . It has been designated GJ 1132 (d) with parenthesis because it is not considered a confirmed planet. Despite the signal having a false alarm probability of less than 0.01%, comparable to GJ 1132 b and c, it is close to the period of the star's magnetic cycle.[
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See also
*Wolf 1061
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Wolf 1061 (also known as HIP 80824 and V2306 Ophiuchi) is an M-class red dwarf star located about 14.1 light-years away in the constellation Ophiuchus. It is the 36th-closest-known star system to the Sun and has a relatively ...
References
{{Vela (constellation)
M-type main-sequence stars
Planetary systems with two confirmed planets
Vela (constellation)
1132
Year 1132 ( MCXXXII) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar.
Events
By place
Levant
* Summer – Imad al-Din Zengi, Seljuk governor (''atabeg'') of Aleppo and Mosul, marches ...