PH1b

For other uses, see PH-1.
PH1b [1] / Kepler-64b
Discovery
Discovered byPlanet Hunters
Discovery siteKepler space telescope
Discovery date15 October 2012 [2]
Transit[2]
Orbital characteristics
0.634 ± 0.011 [3] AU
138.506+0.107
−0.092[3] d
Semi-amplitude(20.69±0.31)×103[3]
StarKepler-64 / PH1 [1]
Physical characteristics
6.18±0.17[3] R🜨
Mass0.08–0.14 [3] MJ
(20–50 [3] ME)
Temperature481 K (208 °C; 406 °F)

PH1b (standing for "Planet Hunters 1"), or by its NASA designation Kepler-64b,[4] is an extrasolar planet found in a circumbinary orbit in the quadruple star system Kepler-64. The planet was discovered by two amateur astronomers from the Planet Hunters project of amateur astronomers using data from the Kepler space telescope with assistance of a Yale University team of international astronomers. The discovery was announced on 15 October 2012.[5][6] It is the first known transiting planet in a quadruple star system,[7] first known circumbinary planet in a quadruple star system,[8] and the first planet in a quadruple star system found. It was the first confirmed planet discovered by PlanetHunters.org.[2] An independent and nearly simultaneous detection was also reported from a revision of Kepler space telescope data using a transit detection algorithm.[9]

  1. ^ a b Cite error: The named reference PCMag was invoked but never defined (see the help page).
  2. ^ a b c "PH1 : A planet in a four-star system". PlanetHunters. 15 October 2012. Retrieved 20 October 2012.
  3. ^ a b c d e f Cite error: The named reference arXiv was invoked but never defined (see the help page).
  4. ^ "Kepler Mission Manager Update". 2015-04-15.
  5. ^ "Citizen Astronomers Discover Planet with Four Suns". Voice of America. 16 October 2012.
  6. ^ "Planet with four suns discovered". Yahoo News. 15 October 2012. Archived from the original on 2012-10-18. Retrieved 20 October 2012.
  7. ^ Cite error: The named reference SpaceRef-2012-10-14 was invoked but never defined (see the help page).
  8. ^ Clavin, Whitney (15 October 2012). "Citizens Discover Four-Star Planet with NASA's Kepler". NASA JPL. Retrieved 20 October 2012.
  9. ^ Kostov, V. B.; McCullough, P. R.; Hinse, T. C.; Tsvetanov, Z. I.; Hébrard, G.; Díaz, R. F.; Deleuil, M.; Valenti, J. A. (2013-01-01). "A Gas Giant Circumbinary Planet Transiting the F Star Primary of the Eclipsing Binary Star KIC 4862625 and the Independent Discovery and Characterization of the Two Transiting Planets in the Kepler-47 System". The Astrophysical Journal. 770 (1): 52. arXiv:1210.3850. Bibcode:2013ApJ...770...52K. doi:10.1088/0004-637X/770/1/52. ISSN 0004-637X. S2CID 119279690.