All articles starting with H
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HD 215152
HD 215152 is a K3 V dwarf star 21.6 parsecs away in Aquarius hosting four confirmed super-Earth planets (b, c, d, e) with periods of 5.76 to 25.2 days, discovered in 2018 via 373 HARPS radial-velocity measurements.
HD 216435
HD 216435 (Tau1 Gruis, HR 8700) is a metal-rich G0 V star 33 parsecs away in Grus with one confirmed gas giant, HD 216435 b: 1.26 Jupiter masses minimum, 1311-day orbit at 2.56 AU, found by radial velocity in 2002.
HD 216437
HD 216437 (rho Indi, HR 8701, HIP 113137) is a metal-rich G4IV-V star 26.7 parsecs away in Indus hosting the 2002-discovered eccentric gas giant HD 216437 b, whose astrometric true mass is 4.2 Jupiter masses.
HD 216520
HD 216520 is a nearby (19.55 pc) inactive K0 V dwarf star with two confirmed sub-Neptune-mass planets, HD 216520 b (35.45 d) and c (154.43 d), found by radial velocity and announced in 2020 by Burt et al.
HD 216598
HD 216598, also known as SW Lacertae (SW Lac), is a short-period eclipsing binary in Lacerta, a W UMa contact system with a G5 V spectrum.
HD 216770
HD 216770 is a G-type star about 116 light-years away with one confirmed gas giant, HD 216770 b: 0.57 Jupiter masses minimum, 118.45-day eccentric orbit at 0.46 AU, found by radial velocity (Mayor et al. 2004, CORALIE survey).
HD 21693
HD 21693 (HIP 16085) is a nearby G-type star 33.3 parsecs away in Reticulum with two confirmed Neptune-mass planets, HD 21693 b (8.23 Earths, 22.7 days) and HD 21693 c (17.37 Earths, 53.7 days), found by HARPS radial velocity and published by Udry et al. 2019.
HD 217107
HD 217107 is a G-type subgiant star about 65 light-years from Earth in the constellation Pisces, hosting two giant planets, including the eccentric hot Jupiter HD 217107 b.
HD 217786
HD 217786 is a binary star system in the constellation Pisces, about 180 light-years from the Sun, whose F-type primary hosts two confirmed planets, including an eccentric super-Jupiter.
HD 219134
HD 219134 (HR 8832) is a K-type dwarf star about 21 light-years away in Cassiopeia, bright enough to see with the naked eye, hosting six reported planets.
HD 219828
HD 219828 (HIP 115100) is a metal-rich G0IV star 73 parsecs away with two radial-velocity planets: hot Neptune HD 219828 b (19 Earth masses, 3.8-day orbit, 2007) and eccentric super-Jupiter HD 219828 c (about 16 Jupiter masses, 13.1-year orbit, e=0.81, 2016).
HD 221416
HD 221416 (HIP 116158, TOI-197) is a bright K0 IV/V subgiant 95.5 pc away hosting HD 221416 b, a hot Saturn (9.17 R_Earth, 60.5 M_Earth, 14.3-day orbit) discovered by TESS in 2019, the first TESS transiting planet with an asteroseismically characterized host.
HD 222582
HD 222582 is a nearby G5 V star 42 pc away with the gas giant HD 222582 b (8.37 Jupiter masses, 572-day orbit, eccentricity 0.73, found 1999 by radial velocity) and a wide red dwarf companion.
HD 224018
HD 224018 (EPIC 246214735) is an old Sun-like G dwarf 105.5 pc away with three confirmed transiting planets (super-Earth b, sub-Neptunes c and d) and a candidate eccentric cold Jupiter, announced by Damasso et al. 2025.
HD 224085
HD 224085, better known as II Pegasi (II Peg), is a chromospherically active RS CVn spectroscopic binary in Pegasus whose K2 IV subgiant is covered by large cool starspots.
HD 22468
HD 22468, also known as HR 1099 or V711 Tauri, is a bright RS Canum Venaticorum variable, a spectroscopic binary star in Taurus known for starspots.
HD 22879
HD 22879 is a metal-poor F9V dwarf star in the constellation Cetus, about 6.7 magnitudes bright, serving as a Gaia FGK benchmark star for calibrating stellar parameters and abundances.
HD 22946
HD 22946 (TOI-411, TIC 100990000) is a bright late F-type star about 63 parsecs away with three transiting planets: a super-Earth (b, 4.04 d) and two sub-Neptunes (c, 9.57 d; d, 47.42 d), the latter's true period fixed by CHEOPS in 2023.
HD 23079
HD 23079 is an F9.5 V star 33.5 pc away with two confirmed planets: gas giant HD 23079 b (2.66 Jupiter masses, 735.7-day orbit, discovered 2001) in the habitable zone, and Neptune-like HD 23079 c (8.26 Earth masses, 5.75 days, 2025).
HD 23472
HD 23472, also cataloged as TOI-174, is a K-type star about 39 parsecs from the Sun hosting five transiting planets, including two rare iron-rich super-Mercuries.
HD 23596
HD 23596 is an F8-type star located 52 parsecs away in the constellation Perseus. It hosts a massive gas-giant exoplanet, HD 23596 b, and a stellar companion, HD 23596 B.
HD 24040
HD 24040 (HIP 17960) is a G0 V star 46.6 pc away in Taurus with two radial-velocity gas giants: HD 24040 b (~4-5 M_Jup, 10-yr orbit) and HD 24040 c (0.2 M_Jup, 515 d), a Solar system analogue candidate.
HD 25329
HD 25329 (also LHS 21, GJ 158) is a metal-poor K-type main-sequence subdwarf about 60 light years away in Perseus, one of the best-studied nitrogen-rich halo dwarfs.
HD 25463
HD 25463 (TOI-554) is an F8 dwarf star 45.6 parsecs away in Taurus with two confirmed transiting planets: sub-Neptune HD 25463 b (7.05-day orbit) and super-Earth HD 25463 c (3.04-day orbit), announced in 2023 by the TESS-Keck Survey.
HD 25912
HD 25912 is a Sun-like G-type star about 160 light-years away with two confirmed radial-velocity planets announced in 2022 by Feng et al.: a 38-Earth-mass gas giant on a 41.8-day orbit and a 16.5-Jupiter-mass companion at 17.8 au.
HD 260655
HD 260655 (GJ 239, TOI-4599) is a nearby M0 V red dwarf 10 parsecs away with two confirmed rocky transiting planets, HD 260655 b and c, found by TESS and confirmed with HIRES and CARMENES radial velocities in Luque et al. 2022.
HD 2638
HD 2638 (HIP 2350) is a K-type star about 55 parsecs away hosting HD 2638 b, a 0.42-Jupiter-mass hot Jupiter in a 3.44-day orbit found by radial velocity in 2005, plus a 0.48-solar-mass M dwarf companion 25.6 AU away.
HD 27442
HD 27442 (Epsilon Reticuli, ε Ret) is a K2 IV subgiant 18.27 pc away in Reticulum with the gas giant HD 27442 b (1.56 Jupiter masses, 428.1-day orbit) and a white dwarf companion HD 27442 B.
HD 27894
HD 27894 is a K2V star 43.8 parsecs away with three giant planets: a 2005-discovered 18-day hot Jupiter b, a Saturn-mass planet c in a 2:1 resonance, and eccentric 5.4-au giant d, found via HARPS radial velocities.
HD 28109
HD 28109 (TOI-282) is an F8 star about 139.6 parsecs away hosting three confirmed transiting Neptunian/sub-Neptune planets discovered in 2022, with outer pair c and d near a 3:2 resonance showing TTVs, plus an unconfirmed 31.32-day TESS candidate TOI-282.02.