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HD 8574

{{short description|Star in the constellation Pisces}}

{{Starbox begin|name=HD 8574 / Bélénos}}

{{Starbox observe

| epoch = J2000.0

| constell = Pisces

| ra = {{RA|01|25|12.51573}}

| dec = {{DEC|+28|34|00.1030}}

| appmag_v = +7.12

}}

{{Starbox character

| type = main sequence

| class = F8

| b-v = {{Val|0.577|0.011}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|+19.05|0.14}}

| prop_mo_ra = {{val|251.270}}

| prop_mo_dec = {{val|−157.570}}

| pm_footnote =

| parallax = 22.3056

| p_error = 0.0218

| parallax_footnote =

| absmag_v = 3.88

}}

{{Starbox detail

| source =

| mass = {{Val|1.144|0.003}}

| radius = {{Val|1.39|0.01}}

| gravity = {{Val|4.21|0.03}}

| luminosity = {{Val|2.335|0.001}}

| temperature = {{Val|6065|6|fmt=commas}}

| metal_fe = −0.06

| rotational_velocity = 6.6

| age_gyr = {{Val|5.0|0.1}}

}}

{{Starbox catalog

| names = Bélénos, {{odlist | HD=8574 | HIP=6643 | BD=+27°225 | SAO=74702 | GC=1710 | LTT=10508 | NLTT=4709 }}

}}

{{Starbox reference

| Simbad = HD+8574

| NSTED = HD-8574

}}

{{Starbox end}}

HD 8574 is a single star in the equatorial constellation of Pisces. It can be viewed with binoculars or a telescope, but not with the naked eye having a low apparent visual magnitude of +7.12. The distance to this object is 146 light-years based on parallax, and it has an absolute magnitude of 3.88. The star is drifting further away from the Sun with a radial velocity of +19 km/s. It has a relatively high proper motion, advancing across the celestial sphere at the rate of 0.298 arc seconds per annum.

The star HD 8574 is named Bélénos. The name was selected in the NameExoWorlds campaign by France, during the 100th anniversary of the IAU. Bélénos was the god of light, of the Sun, and of health in Gaulish mythology.{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}

This object is an F-type star with a stellar classification of F8 and unknown luminosity class. The star is five billion years old and is spinning with a projected rotational velocity of 6.6 km/s. It has 1.1 times the mass of the Sun and 1.4 times the Sun's radius. The star is radiating 2.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,065 K.

In 2001, an extrasolar planet in an eccentric orbit was announced by the European Southern Observatory. The discovery was published in 2003. This object has at least double the mass of Jupiter and has an eccentric orbit with a period of {{Convert|225|days|years|disp=out|abbr=off}}.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b / Bélisama

| mass = > {{Val|1.96|0.18}}

| period = {{Val|225|1.14}}

| semimajor = {{Val|0.76|0.04}}

| eccentricity = {{Val|0.37|0.082}}

}}

{{Orbitbox end}}

See also

References

{{Reflist|refs=

{{cite simbad | title=HD 8574 | accessdate=2019-11-09}}

{{Cite Gaia DR3|297045096447719040}}

{{cite journal

| last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M.

| title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)

| journal=The Astronomical Journal

| volume=129 | issue=3 | pages=1483–1522 | date=March 2005

| doi=10.1086/427854 | bibcode=2005AJ....129.1483L

| arxiv=astro-ph/0412070 | s2cid=2603568 }}

{{cite XHIP|6643}}

{{cite journal

| title=A search for wide visual companions of exoplanet host stars: The Calar Alto Survey

| last1=Mugrauer | first1=M. | last2=Neuhäuser | first2=R.

| last3=Mazeh | first3=T. | last4=Guenther | first4=E.

| last5=Fernández | first5=M. | last6=Broeg | first6=C.

| display-authors=1 | journal=Astronomische Nachrichten

| volume=327 | issue=4 | page=321 | date=May 2006

| doi=10.1002/asna.200510528 | arxiv=astro-ph/0602067

| bibcode=2006AN....327..321M | s2cid=118902770 }}

{{cite journal

| title=Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants

| last1=Luck | first1=R. Earle

| journal=The Astronomical Journal

| volume=153 | issue=1 | id=21 | pages=19 | date=January 2017

| bibcode=2017AJ....153...21L | arxiv=1611.02897

| doi=10.3847/1538-3881/153/1/21 | s2cid=119511744 | doi-access=free }}

{{cite journal

| title=Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert

| journal=Astronomy and Astrophysics

| volume=614 | pages=A55 | year=2018

| display-authors=1 | last1=Aguilera-Gómez | first1=Claudia

| last2=Ramírez | first2=Iván | last3=Chanamé | first3=Julio

| bibcode=2018A&A...614A..55A | arxiv=1803.05922

|doi=10.1051/0004-6361/201732209 | s2cid=62799777

}}

{{cite journal

| title=Revising the ages of planet-hosting stars

| url=http://www.aanda.org/articles/aa/full_html/2015/03/aa24951-14/aa24951-14.html

| last1=Bonfanti | first1=A. | last2=Ortolani | first2=S.

| last3=Piotto | first3=G. | last4=Nascimbeni | first4=V.

| display-authors=1 | journal=Astronomy and Astrophysics

| year=2015 | volume=575 | at=A18

| arxiv=1411.4302 | bibcode=2015A&A...575A..18B

| doi=10.1051/0004-6361/201424951 | s2cid=54555839

}}

{{cite journal

| title=Catalog of Nearby Exoplanets

| last1=Butler | first1=R. P. | last2=Wright | first2=J. T.

| last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A.

| last5=Vogt | first5=S. S. | last6=Tinney | first6=C. G.

| last7=Jones | first7=H. R. A. | last8=Carter | first8=B. D.

| last9=Johnson | first9=J. A. | display-authors=1

| journal=The Astrophysical Journal

| volume=646 | issue=1 | pages=505–522 | date=2006

| arxiv=astro-ph/0607493 | bibcode=2006ApJ...646..505B

| doi=10.1086/504701 | s2cid=119067572 }}

{{cite press release

| title=Exoplanets: The Hunt Continues! | date=April 4, 2001

| publisher=European Southern Observatory

| location=Garching, Germany

| url=http://www.eso.org/public/news/eso0114/ | access-date=December 27, 2012 }}

{{cite journal

| title=The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates

| last1=Perrier | first1=C. | last2=Sivan | first2=J.-P.

| last3=Naef | first3=D. | last4=Beuzit | first4=J. L.

| last5=Mayor | first5=M. | last6=Queloz | first6=D.

| last7=Udry | first7=S. | display-authors=1

| journal=Astronomy and Astrophysics

| volume=410 | issue=3 | pages=1039–1049 | date=2003

| arxiv=astro-ph/0308281 | bibcode=2003A&A...410.1039P

| doi=10.1051/0004-6361:20031340 | s2cid=6946291 }}

}}

External links

{{Sky|01|25|12.5168|+|28|34|00.096|144}}

{{Stars of Pisces}}

{{DEFAULTSORT:HD 8574}}

Category:F-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Pisces (constellation)

BD+27 0225

008574

006643

Bélénos