HD 75898

HD 75898 is an 8th magnitude star approximately 255 light years away in the constellation Lynx. The star is 28% more massive, 60% larger, and 3 times as luminous than our local star. It is a metal-rich star, with 186% the solar abundance of iron. In 2007 the California and Carnegie Planet Search team found one planet orbiting HD 75898.[2]

HD 75898 / Stribor
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lynx
Right ascension 08h 53m 50.8053s[1]
Declination +33° 03′ 24.5230″[1]
Apparent magnitude (V) 8.03 [2]
Characteristics
Spectral type F8V [2]
Astrometry
Radial velocity (Rv)21.695±0.0022[1] km/s
Proper motion (μ) RA: −95.126±0.070[1] mas/yr
Dec.: −28.672±0.052[1] mas/yr
Parallax (π)12.7836 ± 0.0493 mas[1]
Distance255.1 ± 1.0 ly
(78.2 ± 0.3 pc)
Absolute magnitude (MV)3.49 [2]
Details
Mass1.26±0.23[3] M☉
Radius1.58±0.11[3] R☉
Luminosity2.9±0.3[3] L☉
Surface gravity (log g)4.16±0.15[2] cgs
Temperature6021±50[2] K
Metallicity [Fe/H]0.27±0.05[2] dex
Rotational velocity (v sin i)4.54±0.5[2] km/s
Age3.8+1.8
−0.8[2] Gyr
Other designations
Stribor, BD+33°1776, HIP 43674, SAO 61116[4]
Database references
SIMBADdata

In 2019 the HD 75898 system was chosen as part of the NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to be named. HD 75898 was assigned to Croatia. The winning proposal named the star Stribor, after the god of winds in Slavic mythology, and the planet Veles, after a deity of earth, water and the underworld in Slavic mythology.[5]

Planetary system

The planet HD 75898 b was discovered by the radial velocity method in 2007.[2] At the time the centre of mass of the system appeared to be accelerating, indicating the presence of a third, more distant, component at least the size of Jupiter. Later additional monitoring however indicated that this long-period signal was likely a result of long-term magnetic activity on the parent star.[3]

The HD 75898 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b (Veles) ≥2.71±0.36 MJ 1.191±0.073 422.9±0.29 0.11±0.01 — —

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Robinson, Sarah E.; et al. (2007). "Two Jovian-Mass Planets in Earthlike Orbits". The Astrophysical Journal. 670 (2): 1391–1400. arXiv:0708.0832. Bibcode:2007ApJ...670.1391R. doi:10.1086/522106. S2CID 14454598.
  3. Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5. S2CID 119243619.
  4. "HD 75898". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-12-28.
  5. Lukačić, Mirjana (2019-12-20). "EKSKLUZIVNE PRVE SNIMKE Upoznajte Stribora, prvu hrvatsku zvijezdu na nebu". www.icv.hr (in Croatian). Retrieved 2020-04-04.
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