HD_191939

HD 191939

HD 191939

Star in the constellation Draco

HD 191939 is a single yellow (G-type) main-sequence star, located approximately 174 light-years away in the constellation of Draco, taking its primary name from its Henry Draper Catalogue designation.

Quick Facts Constellation, Right ascension ...

Characteristics

HD 191939 is a Sun-like G-type main-sequence star, likely older than the Sun and relatively depleted in metals.

Planetary system

In 2020, an analysis carried out by a team of astronomers led by astronomer Mariona Badenas-Agusti of the TESS project confirmed the existence of three gaseous planets, all smaller than Neptune, in orbit around HD 191939.[4] Another non-transiting gas giant planet designated HD 191939 e was detected in 2021, along with a substellar object on a highly uncertain, 9 to 46 year orbit.[3] In 2022, a sixth planet, with a mass comparable to Uranus, was discovered in the system's habitable zone.[6] The 2021 study also suggested the possible presence of an additional non-transiting planet with a period of 17.7 days,[3] but the 2022 study did not support this.[6]

More information Companion (in order from star), Mass ...

See also

References

  1. [1]
    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.
  2. [2]
    "HD 191939 - Star - SKY-MAP". news.sky-map.org.
  3. [3]
    Lubin, Jack; et al. (2022). "TESS-Keck Survey. IX. Masses of Three Sub-Neptunes Orbiting HD 191939 and the Discovery of a Warm Jovian plus a Distant Substellar Companion". The Astronomical Journal. 163 (2): 101. arXiv:2108.02208. Bibcode:2022AJ....163..101L. doi:10.3847/1538-3881/ac3d38. S2CID 236924440.
  4. [4]
    Badenas-Agusti, Mariona; Günther, Maximilian N.; Daylan, Tansu; Mikal-Evans, Thomas; Vanderburg, Andrew; Huang, Chelsea X.; Matthews, Elisabeth; Rackham, Benjamin V.; Bieryla, Allyson; Stassun, Keivan G.; Kane, Stephen R.; Shporer, Avi; Fulton, Benjamin J.; Hill, Michelle L.; Nowak, Grzegorz; Ribas, Ignasi; Pallé, Enric; Jenkins, Jon M.; Latham, David W.; Seager, Sara; Ricker, George R.; Vanderspek, Roland K.; Winn, Joshua N.; Abril-Pla, Oriol; Collins, Karen A.; Pere Guerra Serra; Niraula, Prajwal; Rustamkulov, Zafar; Barclay, Thomas; et al. (2020). "HD 191939: Three Sub-Neptunes Transiting a Sun-like Star Only 54 pc Away". The Astronomical Journal. 160 (3): 113. arXiv:2002.03958. Bibcode:2020AJ....160..113B. doi:10.3847/1538-3881/aba0b5. S2CID 211069628.
  5. [5]
    "HD 191939". SIMBAD. Centre de données astronomiques de Strasbourg.
  6. [6]
    Orell-Miquel, J.; Nowak, G.; Murgas, F.; Palle, E.; Morello, G.; Luque, R.; Badenas-Agusti, M.; Ribas, I.; Lafarga, M.; Espinoza, N.; Morales, J. C.; Zechmeister, M.; Alqasim, A.; Cochran, W. D.; Gandolfi, D.; Goffo, E.; Kabáth, P.; Korth, J.; Livingston, J.; Lam, K. W. F.; Muresan, A.; Persson, C. M.; Van Eylen, V. (2023). "HD 191939 revisited: New and refined planet mass determinations, and a new planet in the habitable zone". Astronomy & Astrophysics. 669: A40. arXiv:2211.00667. Bibcode:2023A&A...669A..40O. doi:10.1051/0004-6361/202244120. S2CID 253197272.
Share this article:

This article uses material from the Wikipedia article HD_191939, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.