OGLE-2016-BLG-1190Lb

OGLE-2016-BLG-1190Lb
Exoplanet List of exoplanets

Example of a brown dwarf (artist concept)
Parent star
Star OGLE-2016-BLG-1190L[1]
Constellation Sagittarius
Right ascension (α) 17h 58m 53.0s[2]
Declination (δ) −27° 36′ 49″[2]
Distance22,000[3] ly
(6770.0[2] pc)
Spectral type G-dwarf star[3]
Mass (m) 0.88[2] M☉
Physical characteristics
Mass(m)13.38[1][2] MJ
Orbital elements
Semi-major axis(a) 2.17[2] AU
Eccentricity (e) 0.42[2]
Orbital period(P) 1223.6 [2] d
Inclination (i) 41.2[2]°
Time of transit (Tt) 2456989.8 (?)[2] JD
Discovery information
Discovery date 2017[1]
Discoverer(s) Ryu, Y.-H. et al[1]
Discovery method Gravitational microlensing[1]
Discovery site Spitzer Space Telescope[1]
Discovery status Published[1]
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

OGLE-2016-BLG-1190Lb is an extremely massive extrasolar planet, 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]

“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]

Comparison: most brown dwarfs are only slightly larger than Jupiter (10–15%) but up to 80 times more massive due to greater density. The Sun is not to scale and would be larger.

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 Ryu, Y.-H.; et al. (27 October 2017). "OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary". arXiv:1710.09974 [astro-ph.EP].
  2. 1 2 3 4 5 6 7 8 9 10 Staff (2017). "Planet OGLE-2016-BLG-1190L b". Extrasolar Planets Encyclopaedia. Retrieved 10 November 2017.
  3. 1 2 3 4 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.

Coordinates: 17h 58m 53.0s, −27° 36′ 49″

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