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HD 30562

Coordinates:Sky map04h 48m 36.3857s, −05° 40′ 26.561″
From Wikipedia, the free encyclopedia
Star in the constellation Eridanus
HD 30562
Observation data
Epoch J2000.0      Equinox J2000.0
ConstellationEridanus
Right ascension04h 48m 36.38509s[1]
Declination−05° 40′ 26.5577″[1]
Apparent magnitude (V)5.77[2]
Characteristics
Spectral typeG2IV[3][2] or G5V[4] or F8V[5][6]
Apparent magnitude (B)6.401[2]
Apparent magnitude (J)4.984±0.262[2]
Apparent magnitude (H)4.574±0.266[2]
Apparent magnitude (K)4.310±0.049[2]
B−Vcolor index0.631±0.003[2]
Astrometry
Radial velocity (Rv)77.24±0.09[7] km/s
Proper motion (μ)RA: 311.406mas/yr[1]
Dec.: −248.834mas/yr[1]
Parallax (π)38.2495±0.0399 mas[1]
Distance85.27 ± 0.09 ly
(26.14 ± 0.03 pc)
Absolute magnitude (MV)3.66[2]
Details[6]
Mass1.25±0.03 M
Radius1.57±0.03 R
Luminosity2.82±0.01 L
Surface gravity (log g)4.14±0.02 cgs
Temperature5,983±37 K
Metallicity [Fe/H]0.23[8] dex
Rotation24.2 days[5]
Rotational velocity (v sin i)5.8[8] km/s
Age4.4±0.6 Gyr
Other designations
BD–05°1044,GJ 177.1,HD 30562,HIP 22336,HR 1536,SAO 131504,PPM 187358,NLTT 13980,GCRV 2828[9]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata

HD 30562 is astar in theequatorialconstellation ofEridanus. It has a golden hue and can be viewed with the naked eye under good seeing conditions, having anapparent visual magnitude of 5.77.[2] The distance to this star is 85 light years based onparallax.[1] It is drifting further away with a highradial velocity of +77 km/s,[7] having come to within 46.8 light-years some 236,000 years ago.[2]

Thestellar classification of HD 30562 has varied somewhat depending on the study, including types G2IV,[3] G5V,[4] and F8V.[5] It is about 4.4[6] billion years old and appears to bechromospherically inactive.[5] The star is spinning with aprojected rotational velocity of 5.8 km/s,[8] giving it arotation period of 24.2 days.[5] Based on the abundance of iron appearing in thesprectrum, themetallicity of this star, what astronomers term the abundance of elements with higheratomic numbers than helium, is about 70% higher than in the Sun.[8] HD 30562 has 25% greater mass than the Sun and a 57% larger radius. The star is radiating almost three times the luminosity of the Sun from itsphotosphere at aneffective temperature of 5,983 K.[6]

Planetary system

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In August 2009, it was found that this star has aJupiter-like planet that orbits in a very eccentric path.[5][10] In 2023, the inclination andtrue mass of HD 30562 b were determined viaastrometry.[11]

The HD 30562 planetary system[11]
Companion
(in order from star)
MassSemimajor axis
(AU)
Orbital period
(years)
EccentricityInclinationRadius
b1.47+0.45
−0.18
 MJ
2.299+0.032
−0.033
3.158+0.039
−0.042
0.748+0.036
−0.042
65+17
−22
or115+22
−17
°

See also

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References

[edit]
  1. ^abcdeVallenari, 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 atVizieR.
  2. ^abcdefghijAnderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".Astronomy Letters.38 (5): 331.arXiv:1108.4971.Bibcode:2012AstL...38..331A.doi:10.1134/S1063773712050015.S2CID 119257644.
  3. ^abGray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I".The Astronomical Journal.132 (1):161–170.arXiv:astro-ph/0603770.Bibcode:2006AJ....132..161G.doi:10.1086/504637.S2CID 119476992.
  4. ^abHouk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars".Michigan Spectral Survey.5.Bibcode:1999MSS...C05....0H.
  5. ^abcdefFischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory".The Astrophysical Journal.703 (2):1545–1556.arXiv:0908.1596.Bibcode:2009ApJ...703.1545F.doi:10.1088/0004-637X/703/2/1545.S2CID 15524804.
  6. ^abcdBonfanti, A.; et al. (2015)."Revising the ages of planet-hosting stars".Astronomy and Astrophysics.575. A18.arXiv:1411.4302.Bibcode:2015A&A...575A..18B.doi:10.1051/0004-6361/201424951.S2CID 54555839.
  7. ^abNidever, David L.; et al. (August 2002). "Radial Velocities for 889 Late-Type Stars".The Astrophysical Journal Supplement Series.141 (2):503–522.arXiv:astro-ph/0112477.Bibcode:2002ApJS..141..503N.doi:10.1086/340570.S2CID 51814894.
  8. ^abcdLuck, R. Earle (January 2017)."Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants".The Astronomical Journal.153 (1): 19.arXiv:1611.02897.Bibcode:2017AJ....153...21L.doi:10.3847/1538-3881/153/1/21.S2CID 119511744. 21.
  9. ^"HD 30562".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2021-01-14.
  10. ^Marmier, M.; et al. (2013)."The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets".Astronomy and Astrophysics.551. A90.arXiv:1211.6444.Bibcode:2013A&A...551A..90M.doi:10.1051/0004-6361/201219639.S2CID 59467665.
  11. ^abXiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements".Research in Astronomy and Astrophysics.23 (5).arXiv:2303.12409.Bibcode:2023RAA....23e5022X.doi:10.1088/1674-4527/accb7e.S2CID 257663647.


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