HD 8535

HD 8535

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Phoenix
Right ascension	01^h 23^m 37.23585^s[1]
Declination	–41° 16′ 11.2795″[1]
Apparent magnitude (V)	7.70[2]
Characteristics
Spectral type	G0V[3]
Apparent magnitude (B)	8.22[4]
Apparent magnitude (J)	6.735[5]
Apparent magnitude (H)	6.449[5]
Apparent magnitude (K)	6.354[5]
B−V color index	0.553±0.009[2]
Astrometry
Radial velocity (Rv)	+2.51±0.12[1] km/s
Proper motion (μ)	RA: +57.795 mas/yr[1] Dec.: −69.879 mas/yr[1]
Parallax (π)	18.0657 ± 0.0181 mas[1]
Distance	180.5 ± 0.2 ly (55.35 ± 0.06 pc)
Absolute magnitude (MV)	4.10[2]
Details[6]
Mass	1.17±0.02 M☉
Radius	1.18±0.02 R☉
Luminosity	1.85±0.01 L☉
Surface gravity (log g)	4.36±0.02 cgs
Temperature	6,200±50 K
Metallicity [Fe/H]	0.02 dex
Rotational velocity (v sin i)	3.07[7] km/s
Age	2.1±0.9 Gyr
Other designations
CD–41°359, GC 1693, HD 8535, HIP 6511, SAO 215484, PPM 305828[8]
Database references
SIMBAD	data
Exoplanet Archive	data

HD 8535 is a star located 181 light-years (55 parsecs) away from the Sun in the southern constellation of Phoenix. It has a yellow hue and can be viewed using binoculars or a small telescope, having a low apparent visual magnitude of 7.70.[2] The star is drifting further away from the Sun with a radial velocity of +2.5 km/s.[1]

This is an ordinary G-type main-sequence star with a stellar classification of G0V.[3] The luminosity class of 'V' indicates the star is generating energy through core hydrogen fusion. It is about two[6] billion years old and is spinning slowly with a projected rotational velocity of 3 km/s.[7] The abundance of elements other than hydrogen and helium in the star – what astronomers term metallicity – is about the same as in the Sun. It has 17% more mass than the Sun and an 18% greater radius. The star is radiating 1.85 times the luminosity of the Sun from its photosphere at an effective temperature of 6,200 K.[6]

A survey in 2015 has ruled out the existence of any stellar companions at projected distances above 23 astronomical units.[9] However, in 2019 a white dwarf companion to this star was found.[10]

Planetary system

In 2009, a gas giant was found in orbit around the star using the radial velocity method. It has an orbital period of 3.59 years and has at least 68% of the mass of Jupiter.[11]

The HD 8535 planetary system[11]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥ 0.68+0.07 −0.04 MJ	2.45+0.04 −0.06	1,313±28	0.15+0.09 −0.05	—	—

See also

• List of extrasolar planets

References

1. 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.
2. Anderson, 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. Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
4. Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
5. Cutri, R. M.; et al. (June 2003). 2MASS All Sky Catalog of point sources. NASA/IPAC. Bibcode:2003tmc..book.....C.
6. Bonfanti, 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. Delgado Mena, E.; et al. (April 2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics. 576: 24. arXiv:1412.4618. Bibcode:2015A&A...576A..69D. doi:10.1051/0004-6361/201425433. S2CID 56051637. A69.
8. "HD 8535". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-08.
9. Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3): 3127–3136. Bibcode:2015MNRAS.450.3127M. doi:10.1093/mnras/stv771. hdl:1887/49340. Retrieved 19 June 2020.
10. Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society. 490 (4): 5088–5102. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.
11. Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics. 523: A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.