天兔座AF

天兔座AF，也稱為HD 35850，是位於天兔座的一顆F-型主序星，距離太陽系87.5光年（26.8秒差距）。它的視星等為6.3，接近在理想條件下 肉眼能見的極限。雖然一些研究認為它是一對分離僅7009314155528470000♠0.021 AU，非常靠近的光譜聯星；但其他人的研究沒有顯示聯星性質的證據，並且假設的聯興性質很可能是由於星斑的存在所產生的偽影。 天兔座AF是繪架座β移動星群的成員，其年齡年輕得驚人，僅約2,400萬歲。它擁有一個星周盤，並已知有一顆系外行星 。 在2023年，通過凱克天文台的儀器NIRC2，和甚大望遠鏡的光譜偏振高對比外行星研究（英语：Spectro-Polarimetric High-Contrast Exoplanet Research）（SPHERE）儀器的直接影像，在天兔座AF周圍的軌道上發現了一顆氣態巨行星的系外行星。它也在依巴谷衛星和蓋亞任務的天體量測數據中被探測到，從而可以準確量測其質量。光譜證據表明，天兔座AF b具有富含金屬的大氣層，帶有矽酸鹽雲。 已經對天兔座AF b進行了多項研究，發現了一些不同的參數。動態質量測量範圍的最新值從7000279999999999999♠2.8 MJ到 7000550000000000000♠5.5 MJ，行星的軌道傾角範圍從 6999872664625997166♠50°+9° −12°到7000171042266695444♠~98°，與前者的恆星傾角6999942477796076940♠54°+11° −9°一致，表明這是一個對齊的系統。所有的研究都發現這顆行星有一個相當偏心的軌道。 波江座51 繪架座β Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy & Astrophysics. 2022. arXiv:2208.00211 . doi:10.1051/0004-6361/202243940 .  已忽略未知参数|collaboration= (帮助) Gaia DR3 record for this source at VizieR. Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1: B/gcvs. Bibcode:2009yCat....102025S.  Gray, R. O.; Corbally, C. J.; et al. Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample. The Astronomical Journal. July 2006, 132 (1): 161–170. Bibcode:2006AJ....132..161G. S2CID 250741593. arXiv:astro-ph/0603770 . doi:10.1086/504637.  Mesa, D.; Gratton, R.; et al. AF Lep b: the lowest mass planet detected coupling astrometric and direct imaging data. Astronomy & Astrophysics. February 2023, 672: A93. Bibcode:2023A&A...672A..93M. S2CID 256827302. arXiv:2302.06213 . doi:10.1051/0004-6361/202345865.  Anderson, E.; Francis, Ch. XHIP: An extended hipparcos compilation. Astronomy Letters. 2012, 38 (5): 331. Bibcode:2012AstL...38..331A. S2CID 119257644. arXiv:1108.4971 . doi:10.1134/S1063773712050015.  Zhang, Zhoujian; Mollière, Paul; et al. ELemental abundances of Planets and brown dwarfs Imaged around Stars (ELPIS): I. Potential Metal Enrichment of the Exoplanet AF Lep b and a Novel Retrieval Approach for Cloudy Self-luminous Atmospheres. The Astronomical Journal. September 2023, 166 (5): 198. Bibcode:2023AJ....166..198Z. arXiv:2309.02488 . doi:10.3847/1538-3881/acf768 .  Franson, Kyle; Bowler, Brendan P.; et al. Astrometric Accelerations as Dynamical Beacons: A Giant Planet Imaged Inside the Debris Disk of the Young Star AF Lep. The Astrophysical Journal Letters. February 2023, 950 (2): L19. Bibcode:2023ApJ...950L..19F. arXiv:2302.05420 . doi:10.3847/2041-8213/acd6f6 .  Pawellek, Nicole; Wyatt, Mark; et al. A ~75 per cent occurrence rate of debris discs around F stars in the β Pic moving group. Monthly Notices of the Royal Astronomical Society. April 2021, 502 (4): 5390–5416. Bibcode:2021MNRAS.502.5390P. arXiv:2101.12049 . doi:10.1093/mnras/stab269.  Järvinen, S. P.; Arlt, R.; et al. Doppler images and the underlying dynamo. The case of AF Leporis. Astronomy & Astrophysics. February 2015, 574: A25. Bibcode:2015A&A...574A..25J. S2CID 119205096. arXiv:1412.2892 . doi:10.1051/0004-6361/201424229.  V* AF Lep. SIMBAD. 斯特拉斯堡天文資料中心.  MAST: Barbara A. Mikulski Archive for Space Telescopes. Space Telescope Science Institute. [8 December 2021]. （原始内容存档于2023-03-27）.  Spotting a hidden exoplanet. ESO. 20 February 2023 [2024-02-27]. （原始内容存档于2024-07-17）.  De Rosa, Robert J.; Nielsen, Eric L.; et al. Direct imaging discovery of a super-Jovian around the young Sun-like star AF Leporis. Astronomy & Astrophysics. February 2023, 672: A94. Bibcode:2023A&A...672A..94D. S2CID 256827414. arXiv:2302.06332 . doi:10.1051/0004-6361/202345877.  Pearce, Tim D.; Launhardt, Ralf; et al. Planet populations inferred from debris discs. Insights from 178 debris systems in the ISPY, LEECH, and LIStEN planet-hunting surveys. Astronomy & Astrophysics. March 2022, 659: A135. Bibcode:2022A&A...659A.135P. S2CID 246063879. arXiv:2201.08369 . doi:10.1051/0004-6361/202142720.