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Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius [1] |
Right ascension | 23h 32m 08.07235s [2] |
Declination | −21° 48′ 05.1141″ [2] |
Apparent magnitude (V) | 8.15 [3] |
Characteristics | |
Evolutionary stage | Subgiant |
Spectral type | K0IV/V [4] |
Astrometry | |
Radial velocity (Rv) | 25.13±0.14 [2] km/s |
Proper motion (μ) | RA: -96.719 mas/yr [2] Dec.: 51.050 mas/yr [2] |
Parallax (π) | 10.4790 ± 0.0324 mas [2] |
Distance | 311.2 ± 1.0 ly (95.4 ± 0.3 pc) |
Details [3] | |
Mass | 1.212±0.074 M☉ |
Radius | 2.943±0.064 R☉ |
Luminosity | 5.15±0.17 L☉ |
Surface gravity (log g) | 3.584±0.010 cgs |
Temperature | 5080±90 K |
Metallicity [Fe/H] | −0.08±0.08 dex |
Rotational velocity (v sin i) | 2.8±1.6 km/s |
Age | 4.9±1.1 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 221416 (also known as HIP 116158) is an oscillating late subgiant K-type star located about 311 light-years (95 parsecs ) away from Earth. This star is too faint to be seen with the naked eye from Earth. The star is around 5 billion years old and has one discovered exoplanet orbiting it named HD 221416 b, a hot Saturn type planet. [5] [6]
The star has a mass of 1.212 solar masses, a radii of 2.943 solar radii and a luminosity of 5.15 solar luminosity. The star has a metallicty of -0.08 [ Fe/H]. [7]
Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.190±0.018 MJ | 0.1228+0.0025 −0.0026 | 14.2767±0.0037 | 0.115+0.034 −0.030 | 85.75+0.36 −0.35 ° | 0.836+0.031 −0.028 RJ |
54 Piscium is an orange dwarf star approximately 36 light-years away in the constellation of Pisces. In 2003, an extrasolar planet was confirmed to be orbiting the star, and in 2006, a brown dwarf was also discovered orbiting it.
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HD 11964 is a binary star system located 110 light-years away from the Sun in the equatorial constellation of Cetus. It is visible in binoculars or a telescope but is too faint to be seen with the naked eye, having an apparent visual magnitude of 7.51. The system is drifting closer to the Sun with a radial velocity of −9 km/s. Two extrasolar planets have been confirmed to orbit the primary.
HD 210702 is an orange subgiant star located approximately 177 light-years away in the constellation of Pegasus. With a mass of 1.8 times that of the Sun, the star spent its main-sequence life as an A-type star. The visual luminosity is 11.38 times that of the Sun and the magnitude is near the naked-eye limit, but binoculars can easily see it.
HD 118203 is a star located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem Staburags un Liesma. The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU.
HD 192699 b, also named Khomsa, is an exoplanet located approximately 214 light-years away in the constellation of Aquila, orbiting the star HD 192699. This planet was discovered in April 2007, massing at least 2.5 times the mass of Jupiter (MJ). Despite its orbital distance more than that of Earth, the orbital period is less than a year, because the parent star is more massive than the Sun.
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HD 181342 is a star in the constellation of Sagittarius. With an apparent magnitude of 7.55, it cannot be seen with the naked eye. Parallax measurements made by Gaia spacecraft put the star at a distance of 394 light-years away.
HD 179070, also known as Kepler-21, is a F-type subgiant star 354 light-years away in the constellation Lyra. A transiting exoplanet was discovered orbiting this star by the Kepler spacecraft. At a magnitude of 8.25 this was the brightest star observed by Kepler to host a validated planet until the discovery of an exoplanet orbiting HD 212657 in 2018.
HD 21749 is an orange main-sequence star in the constellation Reticulum. It has an apparent visual magnitude of 8.143, which means it is too dim to be seen with the naked eye. From parallax measurements by the Gaia spacecraft, it is located 53 ly (16 pc) from Earth.
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HD 260655 is a relatively bright and cool M0 V red dwarf star located 33 light-years away from the Solar System in the constellation of Gemini. HD 260655 has two confirmed rocky planets, named HD 260655 b and HD 260655 c, that were discovered in 2022. Both planets were detected by the TESS mission and confirmed independently with archival and new precise radial velocity data obtained with the HIRES observatory since 1998, and the CARMENES survey instruments since 2016.
HD 152843 is an early G-type main sequence bright star located 356 light-years away from Earth in the constellation of Hercules. The star is similar to the Sun, with a mass of 1.15 solar masses and a radius of 1.43 solar radii. HD 152843 has been discovered to have two exoplanets orbiting it.
HD 221416 b is a confirmed hot Saturn type exoplanet located 312 light years away from earth and orbiting the late subgiant K-type star, HD 221416. It is part of a small but growing number of discovered exoplanets orbiting evolved stars. This planet was discovered in 2019 by using the primary transit method.
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TOI-813 b is a Saturn sized exoplanet orbiting the star TOI-813, a evolved and bright subgiant G-type star located 858 light years away from Earth. The exoplanet is a Neptune like gas giant type planet with 42 earth masses and 6.7 earth radii. In approximately 780 million years, the planet will be engulfed and destroyed by its parent star.
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