WASP-161 , also named Tislit , is an F-type main-sequence star about 1,162 light-years (356 parsecs ) away in the constellation Puppis . With an apparent magnitude of 11.1, it is much too faint to be visible to the naked eye . It hosts one known exoplanet .
Nomenclature
The designation WASP-161 comes from the Wide Angle Search for Planets .
This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU , which assigned each country a star and planet to be named. This system was assigned to Morocco ; it was chosen because it hosts the first exoplanet with a discovery team led by a Moroccan astronomer.[ 6] Tislit and Isli lakes in the Atlas Mountains of Morocco, near Imilchil . The names mean bride and groom in the Amazigh language , in reference to a heartbroken couple of local legend.[ 7] [ 8]
Planetary system
The planet WASP-161b, later named Isli, is a massive hot Jupiter , discovered using the transit method as part of the Wide Angle Search for Planets (WASP).[ 4] Cadi Ayyad University , used other telescopes, including TRAPPIST-North at the Oukaïmeden Observatory , TRAPPIST-South , and SPECULOOS-South , to confirm the planet initially detected by WASP.[ 6] [ 4]
A 2022 study reported evidence for transit-timing variations of WASP-161b, possibly due to orbital decay or precession ,[ 9] [ 10] [ 11]
References
^ Roman, Nancy G. (1987). "Identification of a constellation from a position" . Publications of the Astronomical Society of the Pacific 99 (617): 695. Bibcode :1987PASP...99..695R . doi :10.1086/132034 Constellation record for this object at VizieR .^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27 – L30 . Bibcode :2000A&A...355L..27H . ISSN 0004-6361 . S2CID 17128864 . ^ a b c d e Barkaoui, K.; Burdanov, A.; et al. (February 2019). "Discovery of Three New Transiting Hot Jupiters: WASP-161 b, WASP-163 b, and WASP-170 b" . The Astronomical Journal 157 (2): 43. arXiv :1807.06548 Bibcode :2019AJ....157...43B . doi :10.3847/1538-3881/aaf422 ^ "WASP-161" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 24 June 2025 .^ a b "WASP-161" . WASP Planets . 14 July 2019. Retrieved 24 June 2025 .^ "Approved names" . NameExoWorlds IAU . Retrieved 24 June 2025 .^ "Morocco" . NameExoWorlds IAU . Retrieved 24 June 2025 .^ Yang, Fan; Chary, Ranga-Ram (December 2022). "Tentative Evidence for Transit-timing Variations of WASP-161b" . The Astronomical Journal 164 (6): 259. arXiv :2204.12306 Bibcode :2022AJ....164..259Y . doi :10.3847/1538-3881/ac9e50 ^ Shan, Su-Su; Yang, Fan; et al. (February 2023). "TESS Timings of 31 Hot Jupiters with Ephemeris Uncertainties" . The Astrophysical Journal Supplement Series 264 (2): 37. arXiv :2111.06678 Bibcode :2023ApJS..264...37S . doi :10.3847/1538-4365/aca65f ^ Maciejewski, G.; Sierzputowska, J.; Golonka, J. (November 2023). "Search for Planets in Hot Jupiter Systems with Multi-Sector TESS Photometry. IV. Null Detections in 12 Systems" . Acta Astronomica 73 (2): 159– 177. arXiv :2312.03319 Bibcode :2023AcA....73..159M . doi :10.32023/0001-5237/73.2.3
