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OGLE-2016-BLG-1190Lb is an extremely massive exoplanet, with a mass about 13.4 times that of Jupiter (MJ), or is, possibly, a low mass brown dwarf, orbiting the G-dwarf star OGLE-2016-BLG-1190L, located about 22,000 light years from Earth, in the constellation of Sagittarius, in the galactic bulge of the Milky Way.[1][3][4]

OGLE-2016-BLG-1190Lb
Discovery
Discovered byRyu, Y.-H. et al[1]
Discovery siteSpitzer Space Telescope[1]
Discovery date2017[1]
Detection method
Gravitational microlensing[1]
Orbital characteristics
Semi-major axis
2.17 AU (325,000,000 km)[2]
Eccentricity0.42[2]
Orbital period (sidereal)
1223.6 [2] d
Inclination41.2[2]
StarOGLE-2016-BLG-1190L[1]
Physical characteristics
Mass13.38[1][2] MJ

    “Since the existence of the brown dwarf desert is the signature of different formation mechanisms for stars and planets, the extremely close proximity of OGLE-2016-BLG-1190Lb to this desert raises the question of whether it is truly a ‘planet’ (by formation mechanism) and therefore reacts back upon its role tracing the galactic distribution of planets," according to astronomers reporting the findings.[1][5]


    Discovery


    The host star was discovered in June 2016 by the Optical Gravitational Lensing Experiment (OGLE) collaboration; the Spitzer Space Telescope observed the microlensing event a few days after its discovery. OGLE-2016-BLG-1190Lb is the first exoplanet discovered by microlensing with the Spitzer space telescope and the first exoplanet discovered lying near the planet/brown dwarf boundary.[1][3] In addition, the discovery "is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar," according to the initial reported study.[1]


    See also



    References


    1. Ryu, Y.-H.; et al. (27 October 2017). "OGLE-2016-BLG-1190Lb: The FirstSpitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary". The Astronomical Journal. 155: 40. arXiv:1710.09974. doi:10.3847/1538-3881/aa9be4. S2CID 54706921.
    2. Staff (2017). "Planet OGLE-2016-BLG-1190L b". Extrasolar Planets Encyclopaedia. Retrieved 10 November 2017.
    3. Nowakowski, Tomasz (6 November 2017). "Extremely massive exoplanet discovered in the Milky Way's bulge". Phys.org. Retrieved 10 November 2017.
    4. Bartels, Meghan (7 November 2017). "A Giant Exoplanet Is Hiding At The Center of the Milky Way Galaxy". Newsweek. Retrieved 10 November 2017.
    5. Wehner, Mike (7 November 2017). "Astronomers just spotted a planet so huge they aren't even sure it's really a planet". BGR. Retrieved 10 November 2017.




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