Qatar Exoplanet Survey: Qatar-6b - A Grazing Transiting Hot Jupiter

Khalid Al-Subai, Zlatan Tsvetanov, David W. Latham, Allyson Bieryla, Gilbert A. Esquerdo, Dimitrios Mislis, Stylianos Pyrzas, Emma Foxell, James McCormac, Christoph Baranec, Nicolas P.E. Vilchez, Richard West, Ali Esamdin, Zhenwei Dang, Hani M. Dalee, Amani A. Al-Rajihi, Abeer Kh Al-Harbi

Research output: Contribution to journalArticle

2 Citations (Scopus)


We report the discovery of Qatar-6b, a new transiting planet identified by the Qatar Exoplanet Survey (QES). The planet orbits a relatively bright (V = 11.44), early-K main-sequence star at an orbital period of P ∼ 3.506 days. An SED fit to available multi-band photometry, ranging from the near-UV to the mid-IR, yields a distance of d = 101 ±6 pc to the system. From a global fit to follow-up photometric and spectroscopic observations, we calculate the mass and radius of the planet to be M P = 0.67 ±0.07 M J and R P = 1.06 ±0.07 R J, respectively. We use multi-color photometric light curves to show that the transit is grazing, making Qatar-6b one of the few exoplanets known in a grazing transit configuration. It adds to the short list of targets that offer the best opportunity to look for additional bodies in the host planetary system through variations in the transit impact factor and duration.

Original languageEnglish
Article number52
JournalAstronomical Journal
Issue number2
Publication statusPublished - 1 Feb 2018



  • planetary systems
  • planets and satellites: detection
  • planets and satellites: fundamental parameters
  • techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Al-Subai, K., Tsvetanov, Z., Latham, D. W., Bieryla, A., Esquerdo, G. A., Mislis, D., Pyrzas, S., Foxell, E., McCormac, J., Baranec, C., Vilchez, N. P. E., West, R., Esamdin, A., Dang, Z., Dalee, H. M., Al-Rajihi, A. A., & Al-Harbi, A. K. (2018). Qatar Exoplanet Survey: Qatar-6b - A Grazing Transiting Hot Jupiter. Astronomical Journal, 155(2), [52].