Epoch J2000.0 Equinox J2000.0
|Right ascension||12h 33m 03.9061s|
|Declination||+44° 54′ 55.196″|
|Apparent magnitude (V)||12.26|
|Radial velocity (Rv)||−16.434 km/s|
|Proper motion (μ)|| RA: −11.622(8) mas/yr |
Dec.: 8.138(10) mas/yr
|Parallax (π)||3.4055 ± 0.0110 mas|
|Distance||958 ± 3 ly |
(293.6 ± 0.9 pc)
|Mass||1.022 ± 0.049 M☉|
|Radius||1.096 ± 0.056 R☉|
|Temperature||5580 ± 100.0 K|
|Metallicity [Fe/H]||0.26 ± 0.08 dex|
|Age||6.6 ± 1.8 Gyr|
HAT-P-36, also referred to as Tuiren is a 12th magnitude G-type main-sequence star estimated to be approximately 958 light-years away from Earth in the constellation Canes Venatici. HAT-P-36 is too faint to be seen with the naked eye, but it is possible to view it with binoculars or a small telescope. In 2012 a hot Jupiter-type exoplanet was discovered orbiting HAT-P-36 with an orbital period of about 1.3 Earth days. In December 2019, HAT-P-36 was named Tuiren and its planetary companion, HAT-P-36b, was named Bran as a result of Ireland's contribution to the 2019 NameExoWorlds campaign. Bran has a mass approximately 1.8 times that of Jupiter and a radius 1.2 times larger.
HAT-P-36 and its planet are named after characters from The Birth of Bran, a story in the book Irish Fairy Tales by James Stephens. The book is a re-telling of various stories from Irish folklore. Tuiren was the aunt of the mythical hero Fionn mac Cumhaill and was turned into a hound by the fairy Uchtdealbh after Tuiren married her husband. Bran and Sceólan were the two puppies mothered by Tuiren while she was a dog. They were cousins of Fionn mac Cumhaill. The names were proposed by John Murphy, a teacher at Regina Mundi College, Cork.
(in order from star)
|b (Bran)||≥1.832±0.099 MJ||0.0238±0.0004||1.327347±0.000003||0.063±0.032||86±1.3°||1.264±0.071 RJ|
HAT-P-36b (Bran) was discovered in 2012 by the HATNet Project using the transit method. A search for transit timing variation did not result in detection of additional planets in the system as at 2021. Surprisingly, a planetary orbital period increase by 0.014 seconds per year was detected by 2021.
- ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
- ^ a b c d e Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- ^ "HAT-P-36". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-02-23.
- ^ "IAU100 NameExoWorlds Approved Names" (PDF). NameExoWorlds. International Astronomical Union. Retrieved 24 July 2020.
- ^ a b "HAT-P-36". Open Exoplanet Catalogue. Retrieved 24 July 2020.
- ^ Smith, Niall (29 September 2019). "Sky Matters: Ireland has the chance to name a star and a planet - any ideas?". Irish Examiner. Retrieved 24 July 2020.
- ^ "TYC 3020-2195-1". Centre de Données astronomiques de Strasbourg. SIMBAD. Retrieved 24 July 2020.
- ^ Gorey, Colm (18 December 2019). "Cork teacher names exoplanet and star after Irish mythical dogs". Silicon Republic. Retrieved 24 July 2020.
- ^ "Planet HAT-P-36 b". Extrasolar Planets Encyclopaedia. Retrieved 24 July 2020.
- ^ Sonbas, E.; Karaman, N.; Özdönmez, A.; Er, H.; Dhuga, K. S.; Göğüş, E.; Nasiroglu, I.; Zejmo, M. (2022), "Probing Transit Timing Variations of three hot Jupiters: HATP-36b, HATP-56b, and WASP-52b", Monthly Notices of the Royal Astronomical Society, 509 (4): 5102–5116, arXiv:2111.05220, doi:10.1093/mnras/stab3270
- ^ Yalçınkaya, S.; Baştürk, Ö.; ElHelweh, F.; Esmer, E.M.; Yörükoğlu, O.; Yılmaz, M.; Şenavcı, H.V.; Kılıçoğlu, T.; Selam, S.O. (2021), "Analysis of the Most Precise Light Curves of HAT-P-36 Detrended from Spot Signals", Acta Astronomica, 71 (3), arXiv:2111.11531, doi:10.32023/0001-5237/71.3.3, S2CID 244488216