All articles starting with H
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HD 28185
HD 28185 is a Sun-like star about 128 light-years away in the constellation Eridanus, known for a giant planet discovered in 2001 in an Earth-like, nearly circular orbit.
HD 284149 A
HD 284149 A is a young F8 star about 118 parsecs away in Taurus, primary of a triple system with a 0.16-solar-mass red dwarf and the 26-Jupiter-mass brown dwarf HD 284149 b at 431 AU.
HD 28471
HD 28471 (DMPP-5) is a nearby low-activity G5V star 43.7 light-years... actually 43.7 parsecs away, hosting three confirmed super-Earth/sub-Neptune planets on near-resonant 3.16, 6.12, and 11.68-day orbits, discovered by radial velocity in 2025, plus a doubted ~1500-day cold giant signal.
HD 285968
HD 285968 (GJ 176, HIP 21932) is a nearby M2 dwarf in Taurus hosting HD 285968 b, a Neptune-like super-Earth of 8.4 Earth masses in an 8.78-day, 0.066 AU orbit, found by HARPS radial velocities in 2008 after a spurious HET detection.
HD 30177
HD 30177 is a metal-rich G8 V star about 55.6 pc away with two radial-velocity giant planets: HD 30177 b, a massive Jupiter analog at 3.8 au found in 2002, and HD 30177 c, a massive Saturn analog near 10 au announced in 2016.
HD 31527
HD 31527 is a G-type star about 38.45 parsecs away in Lepus hosting three confirmed Neptune-mass planets (HD 31527 b, c, d), found by HARPS radial velocities; the outer pair librates in a rare 16/3 mean-motion resonance.
HD 3167
HD 3167 is a bright nearby K0 star, 45.8 parsecs away, with four planets: transiting super-Earth b (0.96 d), sub-Neptune c (29.85 d), and non-transiting d and e, once reported on perpendicular polar orbits.
HD 330075
HD 330075, K-type star about 45 pc away in Ara; hosts HD 330075 b, a hot Jupiter (m sin i 0.62 MJup, 3.39-day orbit, 0.039 AU), the first planet discovered with HARPS in 2004; no transit observed.
HD 33142
HD 33142: K0 III first-ascent red giant in Lepus, ~121 pc away, hosting three radial-velocity planets: HD 33142 b (330 d, 1.26 M_Jup), c (810 d, 0.89 M_Jup), and Saturn-mass d (89.9 d, 0.20 M_Jup, Trifonov et al. 2022).
HD 332231
HD 332231 (TOI 1456) is an F8 dwarf star 80.7 pc away hosting HD 332231 b, a warm sub-Saturn (0.244 M_J, 0.867 R_J) on an 18.71-day, 0.144 AU orbit, with a moderately misaligned orbit (lambda about -42 degrees) and detected TTVs suggesting an outer planet.
HD 33844
HD 33844 is a K0 III giant star about 105.8 parsecs away hosting two super-Jupiter planets, HD 33844 b and c, found by radial velocity in 2015 and likely in a 3:5 mean-motion resonance; planet c is flagged controversial.
HD 34445
HD 34445 is a G0V star 46 parsecs away with up to six radial-velocity planets announced in 2017 (Vogt et al.), periods 49 to 5700 days; a 2025 reanalysis reduced it to one confirmed planet, b.
HD 35843
HD 35843 (TOI 4189) is a metal-poor Sun-like star 69.6 pc away with two confirmed 2025 planets: transiting sub-Neptune HD 35843 c (46.96 d, 2.54 R⊕) and inner super-Earth HD 35843 b (9.90 d, 5.84 M⊕).
HD 37605
HD 37605 is a metal-rich K0 V star about 46.8 pc away with two gas giants: HD 37605 b, an eccentric (e~0.67) 55-day 2.69-Jupiter-mass planet found in 2004 with the Hobby-Eberly Telescope, and near-circular HD 37605 c, a 7.5-year, 3.19-Jupiter-mass planet found in 2012.
HD 38529
HD 38529: post-main-sequence G8 subgiant 42.35 pc away with two giant companions (warm Jupiter HD 38529 b, 14.3 d; brown-dwarf-boundary HD 38529 c, ~5.8 yr), an M-dwarf companion, and a debris disc.
HD 39194
HD 3914 is an early K-type main sequence star 26.4 parsecs away, orbited by three planets reported as candidates in 2011 and confirmed in 2021.
HD 40307
HD 40307 is a nearby K2 V metal-deficient star 13 parsecs away with three confirmed super-Earths (b, c, d) found by HARPS in 2008; a disputed six-planet solution adds f and the controversial habitable-zone candidate HD 40307 g.
HD 40979
HD 40979 is an F8 V star about 34 pc away in Auriga hosting the gas giant HD 40979 b (discovered 2002, radial velocity, ~264-day eccentric orbit) and stellar companions B and C, forming a hierarchical triple system.
HD 41004 A
HD 41004 A is the K1V primary star of a tight binary 41.5 pc away, hosting the gas giant HD 41004 A b (2.54 Jupiter masses, 963-day eccentric orbit, found 2004 by radial velocity); its M2V companion hosts a brown dwarf.
HD 41004 B
HD 41004 B is an M2 red dwarf, secondary of a K1V+M2V binary 41.5 pc away in Pictor, hosting HD 41004 B b, an 18.37-Jupiter-mass brown dwarf in a 1.33-day, 0.0177-au orbit found by CORALIE radial velocities.
HD 4203
HD 4203 is a G5-type star about 81 parsecs away in Pisces with two radial-velocity gas giants: HD 4203 b (2001, 431.88-day eccentric orbit) and HD 4203 c (2014, 18.4-year orbit at 6.95 AU).
HD 4208
HD 4208 (Cocibolca, HIP 3479) is a metal-poor G-type star 34.2 parsecs away with one confirmed gas giant, HD 4208 b: 0.81 Jupiter masses, 833-day nearly circular orbit at 1.662 AU, found by radial velocity in 2001 (Vogt et al. 2002).
HD 4308
HD 4308 (HIP 3497, GJ 9028) is a G-type star 22 parsecs away in Tucana with sub-solar metallicity, hosting HD 4308 b, a Neptune-like planet of about 14-16 Earth masses in a 15.56-day circular orbit, found by HARPS radial velocity in 2005.
HD 43197
HD 43197 (IAU name Amadioha) is a Sun-like G-type star about 62.4 parsecs away with two gas giants: eccentric warm Jupiter HD 43197 b (2010) and cold super-Jupiter HD 43197 c (2022).
HD 45184
HD 45184 (HIP 30503, GJ 3394) is a G1.5 V star 71.4 light years away with two confirmed Neptune-like planets, b (12.19 Earths, 5.89 d) and c (8.81 Earths, 13.1 d), found by radial velocity in 2019.
HD 45364
HD 45364 is a K0V star ~34 pc away with two gas giants, HD 45364 b and c, found by HARPS radial velocities in 2008; the pair was the first exoplanet system reported in a 3:2 mean motion resonance, later debated as a quasi-resonance.
HD 46375
HD 46375 is a Sun-like K-type star about 96 light-years from Earth in Monoceros, hosting the Saturn-mass exoplanet HD 46375 b and a small orange-dwarf companion.
HD 47186
HD 47186 is a G5V star 37.5 pc away with two confirmed radial-velocity planets: hot Neptune HD 47186 b (22.8 Earth masses, 4.08-day orbit) and Saturn-mass HD 47186 c (0.35 Jupiter masses, 3.7-year orbit), announced 2008.
HD 4732
HD 4732 (HR 228, HIP 3834) is an evolved K0 subgiant about 55 parsecs away in Cetus with two giant planets, HD 4732 b and c, found by radial velocity in 2012 (Sato et al. 2013), plus a faint stellar companion HD 4732 B.
HD 47366
HD 47366 is an evolved K-type giant star 84.4 pc away with two confirmed giant planets, HD 47366 b and c, found by radial velocity in 2016; its original unstable orbital solution was revised in 2019.