OGLE-2007-BLG-349(AB)b

OGLE-2007-BLG-349(AB)b
Exoplanet List of exoplanets

Artist's impression of OGLE-2007-BLG-349(AB)b (foreground) orbiting its parent stars (upper right).
Parent star
Star OGLE-2007-BLG-349
Constellation Sagittarius
Right ascension (α) 18h 05m 24s
Declination (δ) –26° 25′ 19″
Apparent magnitude (mV) 24.73[1]
Distance~8,000[2] ly
(2760 ± 380[1] pc)
Spectral type M / M[1]
Mass (m) A: 0.41 (± 0.07)[1] M☉
B: 0.30 (± 0.07)[1] M☉
Physical characteristics
Mass(m)80 (± 13)[1] M⊕
Observed separation
Projected separation (d) 2.59+0.43
−0.34[1] AU
Discovery information
Discovery date 22 September 2016
Discoverer(s) Hubble Space Telescope
Discovery method Gravitational microlensing
Discovery status Published
Other designations
OGLE-2007-BLG-349(AB)c
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

OGLE-2007-BLG-349(AB)b[note 1] is a circumbinary extrasolar planet about 8,000 light-years away in the constellation of Sagittarius.[2] It is the first circumbinary exoplanet to be discovered using the microlensing method of detecting exoplanets.[1]

Characteristics

Mass and orbit

OGLE-2007-BLG-349L(AB)b is a super-Neptune, an exoplanet that has a mass and radius larger than that of Neptune. It has a mass of around 80 M⊕.[1] This is somewhat close to the mass of Saturn, so OGLE-2007-BLG-349L(AB)b can also be considered a gas giant. It orbits at a distance of around 2.9 AU in a circumbinary orbit, meaning it orbits around two stars.

Host star

The planet orbits in a circumbinary (M-type) binary star system named OGLE-2007-BLG-349L. They orbit around each other roughly every 9 days.[1] The stars have masses of 0.41 and 0.30 M☉, respectively. The age of the system, radii and temperatures of the stars are not known. In comparison, the Sun is 4.6 billion years old[3] and has a surface temperature of 5778 K.[4]

The star's apparent magnitude, or how bright it appears from Earth's perspective, is 14.3. Therefore, it is too dim to be seen with the naked eye.

See also

Notes

  1. ↑ The paper incorrectly refers to the planet as planet "c", however, this is probably just an error and should not be confused with the "B" star. Alternatively it can be used to differ from the secondary star.

References

  1. 1 2 3 4 5 6 7 8 9 10 http://hubblesite.org/pubinfo/pdf/2016/32/pdf.pdf
  2. 1 2 https://exoplanets.nasa.gov/news/1389/hubble-finds-planet-orbiting-pair-of-stars-8000-light-years-away/
  3. ↑ Fraser Cain (16 September 2008). "How Old is the Sun?". Universe Today. Retrieved 19 February 2011.
  4. ↑ Fraser Cain (15 September 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.

Coordinates: 18h 05m 24s, −26° 25′ 19″


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