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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
[1] AU
Discovery information
Discovery date22 September 2016
Discoverer(s) Hubble Space Telescope
Discovery method Gravitational microlensing
Discovery statusPublished
Other designations
OGLE-2007-BLG-349(AB)c [note 1]
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

OGLE-2007-BLG-349(AB)b [note 1] [3] 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]



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 [4] [5] and has a surface temperature of 5778 K. [6] 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


  1. 1 2 The initial paper intentionally refers to the planet as planet "c", as their solution to "an apparent inconsistency" in exoplanet naming convention. Other sources, such as the NASA Exoplanet Archive and Extrasolar Planets Encyclopaedia, refer to it as planet "b".


  1. 1 2 3 4 5 6 7 8 9 10 Bennett, D. P.; Rhie, S. H.; Udalski, A.; Gould, A.; Tsapras, Y.; Kubas, D.; Bond, I. A.; Greenhill, J.; Cassan, A. (September 21, 2016). "The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c". The Astronomical Journal . 152 (5). arXiv: 1609.06720 Freely accessible. Bibcode:2016AJ....152..125B. doi:10.3847/0004-6256/152/5/125.
  2. 1 2 "Hubble finds planet orbiting pair of stars 8,000 light-years away". NASA Goddard Space Flight Center . Retrieved September 4, 2017.
  3. "OGLE-2007-BLG-349(AB) b". Extrasolar Planets Encyclopaedia . Retrieved September 4, 2017.
  4. Bonanno, A.; Schlattl, H.; Paternò, L. (August 2002). "The age of the Sun and the relativistic corrections in the EOS". Astronomy & Astrophysics . 390 (3): 1115–1118. arXiv: astro-ph/0204331 Freely accessible. Bibcode:2002A&A...390.1115B. doi: 10.1051/0004-6361:20020749 Freely accessible. ISSN   0004-6361.
  5. Connelly, James N.; Bizzarro, Martin; Krot, Alexander N.; Nordlund, Åke; Wielandt, Daniel; Ivanova, Marina A. (November 2, 2012). "The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk". Science . 338 (6107): 651–655. Bibcode:2012Sci...338..651C. doi:10.1126/science.1226919. ISSN   0036-8075. PMID   23118187.
  6. Williams, D. R. (July 1, 2013). "Sun Fact Sheet". NASA Goddard Space Flight Center . Retrieved September 4, 2017.

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