{{Short description|Star in the constellation Hercules}} {{Starbox begin}} {{Starbox image | image= {{Location mark |image=Hercules constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=8 Herculis |x=946|y=802 }} |caption=Location of 8 Herculis (circled in red) }} {{Starbox observe | epoch = J2000.0 | constell = Hercules<ref name=Anderson2012/> | ra = {{RA|16|08|46.6312}}<ref name="GaiaDR3"/> | dec = {{DEC|+17|12|20.292}}<ref name="GaiaDR3"/> | appmag_v = +6.13<ref name=Anderson2012/> }} {{Starbox character | type = main sequence<ref name=zorec2012/> | class = A0Vnn<ref name=zorec2012/> | b-v = {{Val|−0.003|0.005}}<ref name=Anderson2012/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|−17.0|4.3}}<ref name=Anderson2012/> | prop_mo_ra = {{val|−18.098|(35)}} | prop_mo_dec = {{val|−31.408|(43)}} | pm_footnote = <ref name="GaiaDR3"/> | parallax = 8.1684 | p_error = 0.0430 | parallax_footnote = <ref name="GaiaDR3"/> | absmag_v = +1.18<ref name=Anderson2012/> }} {{Starbox detail | mass = 2.52<ref name=tic/> | radius = 2.54<ref name=tic/> | luminosity = 55<ref name=tic/> | gravity = 4.03<ref name=tic/> | temperature = 9,863<ref name=tic/> | metal_fe = +0.10<ref name=huson2025/> | rotational_velocity = 259<ref name=zorec2012/> | age_myr = 317<ref name=gontcharov2012/> }} {{Starbox catalog | names = {{odlist | F=8&nbsp;Her | BD=+17°2967 | HD=145122 | HIP=79102 | SAO=101962 }}<ref name=SIMBAD>{{cite simbad | title=8 Her | access-date=2025-10-14 }}</ref> }} {{Starbox reference | Simbad = HD+145122 }} {{Starbox end}}

'''8 Herculis''' or '''8 Her''' is an A-type main-sequence star {{convert|122.4|pc|ly|lk=on|abbr=off|order=flip}} away in the constellation Hercules. It is also known as HD 145122. Because of its apparent magnitude, of 6.13 the star can be very faintly seen with the naked eye in excellent conditions.

== Stellar properties == 8 Herculis is a main-sequence star of spectral type A0Vnn. The ''nn'' indicates extremely nebulous spectral lines due to its rapid rotation. The star has about 2.5 times the mass, 2.5 times the radius, and 55 times the luminosity of the Sun. The star appears to have a similar metallicity to the Sun. At 317 million years old, it is modelled to be about 40% of the way through its main sequence life.<ref name=zorec2012/>

== References == <references>

<ref name="GaiaDR3">{{Cite Gaia DR3|1198906830389748864}}</ref>

<ref name=Anderson2012>{{cite XHIP|79102}}</ref>

<ref name=zorec2012>{{cite journal |last1=Zorec |first1=J. |last2=Royer |first2=F. |title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities |journal=Astronomy and Astrophysics |date=2012 |volume=537 |pages=A120 |doi=10.1051/0004-6361/201117691 |arxiv=1201.2052 |bibcode=2012A&A...537A.120Z }}</ref>

<ref name=tic>{{cite journal |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |display-authors=1 |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |bibcode=2019AJ....158..138S }}</ref>

<ref name=gontcharov2012>{{cite journal |last1=Gontcharov |first1=G. A. |title=Dependence of kinematics on the age of stars in the solar neighborhood |journal=Astronomy Letters |date=2012 |volume=38 |issue=12 |page=771 |doi=10.1134/S1063773712120031 |arxiv=1606.08814 |bibcode=2012AstL...38..771G }}</ref>

<ref name=huson2025>{{cite journal |last1=Huson |first1=Dylan |last2=Cowan |first2=Indiana |last3=Sizemore |first3=Logan |last4=Kounkel |first4=Marina |last5=Hutchinson |first5=Brian |title=Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages |journal=The Astrophysical Journal |date=2025 |volume=984 |issue=1 |page=58 |doi=10.3847/1538-4357/adc2fa |doi-access=free |arxiv=2503.02958 |bibcode=2025ApJ...984...58H }}</ref>

</references>

{{Stars of Hercules}}

Herculis, 008 Category:Hercules (constellation) 145122 079102 BD+17 2967 Category:A-type main-sequence stars