Astronomy:HD 30562

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Short description: Star in the constellation Eridanus
HD 30562
Observation data
Equinox J2000.0]] (ICRS)
Constellation Eridanus
Right ascension  04h 48m 36.38509s[1]
Declination −05° 40′ 26.5577″[1]
Apparent magnitude (V) 5.77[2]
Characteristics
Spectral type G2IV[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−V color index 0.631±0.003[2]
Astrometry
Radial velocity (Rv)77.24±0.09[7] km/s
Proper motion (μ) RA: 311.406[1] mas/yr
Dec.: −248.834[1] mas/yr
Parallax (π)38.2495 ± 0.0399[1] mas
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[9]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

HD 30562 is a star in the equatorial constellation of Eridanus. It has a golden hue and can be viewed with the naked eye under good seeing conditions, having an apparent visual magnitude of 5.77.[2] The distance to this star is 85 light years based on parallax.[1] It is drifting further away with a high radial velocity of +77 km/s,[7] having come to within 46.8 light-years some 236,000 years ago.[2]

The stellar 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 be chromospherically inactive.[5] The star is spinning with a projected rotational velocity of 5.8 km/s,[8] giving it a rotation period of 24.2 days.[5] Based on the abundance of iron appearing in the sprectrum, the metallicity of this star, what astronomers term the abundance of elements with higher atomic 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 its photosphere at an effective temperature of 5,983 K.[6]

Planetary system

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

The HD 30562 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 1.47+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 or 115+22
−17° 		—

See also

  • List of extrasolar planets

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 Gray, 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. doi:10.1086/504637. Bibcode: 2006AJ....132..161G. 
  4. ↑ 4.0 4.1 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey 5. Bibcode: 1999MSS...C05....0H. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Fischer, Debra et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". The Astrophysical Journal 703 (2): 1545–1556. doi:10.1088/0004-637X/703/2/1545. Bibcode: 2009ApJ...703.1545F. 
  6. ↑ 6.0 6.1 6.2 6.3 Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics 575: A18. doi:10.1051/0004-6361/201424951. Bibcode: 2015A&A...575A..18B. http://www.aanda.org/articles/aa/full_html/2015/03/aa24951-14/aa24951-14.html. 
  7. ↑ 7.0 7.1 Nidever, David L. et al. (August 2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series 141 (2): 503–522. doi:10.1086/340570. Bibcode: 2002ApJS..141..503N. 
  8. ↑ 8.0 8.1 8.2 8.3 Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal 153 (1): 19. doi:10.3847/1538-3881/153/1/21. 21. Bibcode: 2017AJ....153...21L. 
  9. ↑ "HD 30562". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+30562. 
  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. doi:10.1051/0004-6361/201219639. Bibcode: 2013A&A...551A..90M. https://www.aanda.org/articles/aa/full_html/2013/03/aa19639-12/aa19639-12.html. 
  11. ↑ 11.0 11.1 Xiao, Guang-Yao et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5). doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X. 

Coordinates: Sky map 04h 48m 36.3857s, −05° 40′ 26.561″



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