HD 75898

{{Short description|Star in the constellation Lynx}} {{Starbox begin | name = HD 75898 / Stribor }} {{Starbox observe | epoch = J2000.0 | constell = Lynx | ra = {{RA|08|53|50.80524}}<ref name="GaiaDR3"/> | dec = {{DEC|+33|03|24.5206}}<ref name="GaiaDR3"/> | appmag_v = 8.03<ref name="Robinson2007"/> }} {{Starbox character | class = F8V<ref name="Robinson2007"/> | b-v = 0.626<ref name="Robinson2007"/> | variable = }} {{Starbox astrometry | radial_v = {{val|21.79|0.13}}<ref name="GaiaDR3"/> | prop_mo_ra = {{val|−95.110|(29)}} | prop_mo_dec = {{val|−28.503|(26)}} | pm_footnote = <ref name="GaiaDR3"/> | parallax = 12.8110 | p_error = 0.0329 | parallax_footnote = <ref name="GaiaDR3"/> | absmag_v = 3.49<ref name="Robinson2007"/> }} {{Starbox detail | source = <ref name="Ruggieri2024"/> | mass = {{val|1.295|0.015}} | radius = {{val|1.58|0.11}}<ref name="Ment2018"/> | luminosity = {{val|2.9|0.3}}<ref name="Ment2018"/> | gravity = {{val|4.34|0.13}} | temperature = {{val|6122|52}} | metal_fe = {{val|+0.29|0.06}} | rotational_velocity = {{val|4.2|0.5}} | age_gyr = {{val|3.2|0.4}} }} {{Starbox catalog | names = {{odlist | name=Stribor | BD=+33°1776 | HD=75898 | HIP=43674 | SAO=61116 }}<ref name="Simbad"/> }} {{Starbox reference | Simbad = HD+75898 }} {{Starbox end}} '''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 as the Sun. 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.<ref name="Robinson2007"/>

==Nomenclature== 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 b '''Veles''', after a deity of earth, water and the underworld in Slavic mythology.<ref>{{cite web|url=https://www.icv.hr/2019/12/ekskluzivne-prve-snimke-upoznajte-stribora-prvu-hrvatsku-zvijezdu-na-nebu/|title=EKSKLUZIVNE PRVE SNIMKE Upoznajte Stribora, prvu hrvatsku zvijezdu na nebu|last=Lukačić|first=Mirjana|date=2019-12-20|work=www.icv.hr|language=hr|accessdate=2020-04-04}}</ref>

==Planetary system== The planet HD 75898 b was discovered by the radial velocity method in 2007.<ref name="Robinson2007"/> 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 mass 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.<ref name="Ment2018"/>

However in 2024, an additional long-period planet, HD 75898 c, was confirmed using both astrometry and radial velocity, in addition to an intermediate-period activity cycle. Both planets are super-Jupiters, with planet c having a mass 8.5 times that of Jupiter, and planet b having a minimum mass 2.5 times that of Jupiter, with a likely true mass of about 6 Jupiters if coplanar orbits are assumed.<ref name="Ruggieri2024"/>

{{OrbitboxPlanet begin | table_ref = <ref name="Ruggieri2024"/> }} {{OrbitboxPlanet | exoplanet = b (Veles) | mass = {{val|2.55|0.04|p=≥}} | semimajor = {{val|1.2025|0.0047}} | period = {{val|422.82|0.22}} | eccentricity = {{val|0.105|0.009}} }} {{OrbitboxPlanet | exoplanet = c | mass = {{val|8.49|0.65|0.63}} | semimajor = {{val|7.39|0.04|0.05}} | period = {{val|6717|44|40}} | eccentricity = {{val|0.08|0.01}} | inclination = {{val|153|2|3}} }} {{Orbitbox end}}

==See also== * HD 5319 * List of extrasolar planets

==References== {{Reflist|refs=

<ref name="Ment2018">{{cite journal | title=Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810 | last1=Ment | first1=Kristo | last2=Fischer | first2=Debra A. | last3=Bakos | first3=Gaspar | last4=Howard | first4=Andrew W. | last5=Isaacson | first5=Howard | display-authors=1 | journal=The Astronomical Journal | volume=156 | issue=5 | at=213 | year=2018 | arxiv=1809.01228 | bibcode=2018AJ....156..213M | doi=10.3847/1538-3881/aae1f5 | s2cid=119243619 | doi-access=free }}</ref>

<ref name="Robinson2007">{{cite journal | title=Two Jovian-Mass Planets in Earthlike Orbits | last1=Robinson | first1=Sarah E. | last2=Laughlin | first2=Gregory | last3=Vogt | first3=Steven S. | last4=Fischer | first4=Debra A. | last5=Butler | first5=R. Paul | last6=Marcy | first6=Geoffrey W. | last7=Henry | first7=Gregory W. | last8=Driscoll | first8=Peter | last9=Takeda | first9=Genya | last10=Johnson | first10=John A. | display-authors=1 | journal=The Astrophysical Journal | volume=670 | issue=2 | pages=1391–1400 | year=2007 | arxiv=0708.0832 | bibcode=2007ApJ...670.1391R | doi=10.1086/522106 | s2cid=14454598 }}</ref>

<ref name="Simbad">{{cite simbad | title=HD 75898 | access-date=2018-12-28 }}</ref>

<ref name="Ruggieri2024">{{cite journal |last1=Ruggieri |first1=A. |last2=Desidera |first2=S. |display-authors=etal |date=September 2024 |title=The GAPS Programme at TNG: LVIII. Two multi-planet systems with long-period substellar companions around metal-rich stars |journal=Astronomy & Astrophysics |volume=689 |issue= |pages=A235 |doi=10.1051/0004-6361/202449456 |doi-access=free |bibcode=2024A&A...689A.235R|hdl=2108/390324 |hdl-access=free }}</ref>

}}

==External links== * {{cite encyclopedia |url=http://exoplanet.eu/star.php?st=HD+75898 |archive-url=https://web.archive.org/web/20070702190207/http://exoplanet.eu/star.php?st=HD+75898 |url-status=dead |archive-date=July 2, 2007 |encyclopedia=Extrasolar Planets Encyclopaedia |title=HD 75898 }} {{Sky|08|53|50.8051|+|33|03|24.522|262.82}}

{{DEFAULTSORT:HD 75898}} 075898 043674 Category:Lynx (constellation) Category:Planetary systems with two confirmed planets BD+33 1776 Category:F-type main-sequence stars Stribor