HD 221416

Last updated
HD 221416
Artist's impression of an ultra-hot Jupiter transiting its star.jpg
An artistic impression of a hot Jupiter, a type of planet which includes HD 221416 b
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
BD−22 6143, CD−22 16353, CPD−22 8376, HD  221416, HIP  116158, SAO  191976, TOI-197, TIC  441462736, TYC  6409-234-1, Gaia DR2 2388463203438164096, [4]
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]

The HD 221416 planetary system [3]
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±0.00370.115+0.034
−0.030
85.75+0.36
−0.35
°
0.836+0.031
−0.028
  RJ

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References

  1. "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. 1 2 3 4 5 6 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.
  3. 1 2 3 Huber, Daniel; Chaplin, William J.; et al. (June 2019). "A Hot Saturn Orbiting an Oscillating Late Subgiant Discovered by TESS". The Astronomical Journal . 157 (6): 245. arXiv: 1901.01643 . Bibcode:2019AJ....157..245H. doi: 10.3847/1538-3881/ab1488 .
  4. 1 2 "HD 221416". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 1 November 2023.
  5. "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2023-11-01.
  6. Lazaro, Enrico de (2019-03-29). "Hot-Saturn Exoplanet Discovered by TESS, Characterized Using Asteroseismology | Sci.News". Sci.News: Breaking Science News. Retrieved 2023-11-01.
  7. "Open Exoplanet Catalogue - HD 221416 b". www.openexoplanetcatalogue.com. Retrieved 2023-11-03.