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Created page with "{{Night Sky | image = | designation =17 Arietis<br/>η Ari<br/>HD 13555 | rightascension =02<sup>h</sup> 12<sup>m</sup> 48.0856<sup>s</sup><ref name=simbad>{{ci..."
{{Night Sky
| image =
| designation =17 Arietis<br/>η Ari<br/>HD 13555
| rightascension =02<sup>h</sup> 12<sup>m</sup> 48.0856<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Eta+Arietis|title=Eta Arietis|accessdate=July 03, 2020|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}</ref><ref name=Gaia>{{cite journal
|last1=Gaia Collaboration |first1=
|title=VizieR Online Data Catalog: Gaia DR2
|journal=VizieR Online Data Catalog
|volume=I/345
|issue=|page=I/345|date=2018
|doi=
|bibcode=2018yCat.1345....0G
|ref=harv
}} {{arXiv|0708.1752}}</ref>
| declination =+21° 12′ 39.5775″<ref name=simbad/><ref name=Gaia/>
| distance =94.16 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/10306/etaarietis|title=Eta Arietis (17 Arietis) Star Facts|accessdate=July 03, 2020|publisher=universeguide.com}}</ref>
| constellation =Aries
| type =Main sequence star
| dimensions =
| magnitude =Apparent Mag: +5.23<ref name=universeguide/><br/>Absolute Mag: 2.84 / 2.93<ref name=universeguide/>
| redshift =
| radvelocity =5.506 ± 0.0009 km/s<ref name=simbad/><ref>
{{cite journal
|last1=Soubiran |first1=C.
|last2=Jasniewicz |first2=G.
|last3=Chemin |first3=L.
|last4=Zurbach |first4=C.
|last5=Brouillet |first5=N.
|last6=Panuzzo |first6=P.
|last7=Sartoretti |first7=P.
|last8=Katz |first8=D.
|last9=Le Campion |first9=J. -F.
|display-authors=3
|title=Gaia Data Release 2. The catalogue of radial velocity standard stars.
|journal=Astronomy and Astrophysics
|volume=616A
|issue=8|page=|date=2018
|doi=10.1051/0004-6361/201832795
|bibcode=2018A&A...616A...7S
|ref=harv
}} {{arXiv|1804.09370}}
</ref>
| propmotion =RA: 163.917 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: 5.000 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =33.3383 ± 0.1196 mas<ref name=simbad/><ref name=Gaia/>
}}
'''Eta Arietis''' (17 Arietis, η Ari, HD 13555) is a [[main sequence star]] in the [[constellation]] of [[Aries]], the [[ram]].<ref name=theskylive>{{cite web|url=https://theskylive.com/sky/stars/eta-arietis-star|title=Eta Arietis|publisher=theskylive.com}}</ref> It is one of the closest stars to the [[Sun]] at just 94.16 [[light year]]s from [[Earth]]. Its name comes from the [[Bayer designation|Bayer]] method of naming stars. The [[Greek alphabet|Greek]] first letter indicates the brightness of the star comapred to others in the constellation, with higher letters indicating dimmer stars. As such Eta Arietis is one of the dimmer stars in the constellation. It can be observed with the unaided eye in the Northern hemisphere, but its faintness means that dark skies with little to no [[light pollution]] are required.
The star is thought to be quite similar to the [[Sun]], with a radius 1.91 larger and a surface temperature slightly higher at 6,500 kelvin.<ref name=universeguide/> These combine to mean Eta Arietis emits 6 times more radiation the Sol.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]
| image =
| designation =17 Arietis<br/>η Ari<br/>HD 13555
| rightascension =02<sup>h</sup> 12<sup>m</sup> 48.0856<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Eta+Arietis|title=Eta Arietis|accessdate=July 03, 2020|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}</ref><ref name=Gaia>{{cite journal
|last1=Gaia Collaboration |first1=
|title=VizieR Online Data Catalog: Gaia DR2
|journal=VizieR Online Data Catalog
|volume=I/345
|issue=|page=I/345|date=2018
|doi=
|bibcode=2018yCat.1345....0G
|ref=harv
}} {{arXiv|0708.1752}}</ref>
| declination =+21° 12′ 39.5775″<ref name=simbad/><ref name=Gaia/>
| distance =94.16 ly<ref name=universeguide>{{cite web|url=https://www.universeguide.com/star/10306/etaarietis|title=Eta Arietis (17 Arietis) Star Facts|accessdate=July 03, 2020|publisher=universeguide.com}}</ref>
| constellation =Aries
| type =Main sequence star
| dimensions =
| magnitude =Apparent Mag: +5.23<ref name=universeguide/><br/>Absolute Mag: 2.84 / 2.93<ref name=universeguide/>
| redshift =
| radvelocity =5.506 ± 0.0009 km/s<ref name=simbad/><ref>
{{cite journal
|last1=Soubiran |first1=C.
|last2=Jasniewicz |first2=G.
|last3=Chemin |first3=L.
|last4=Zurbach |first4=C.
|last5=Brouillet |first5=N.
|last6=Panuzzo |first6=P.
|last7=Sartoretti |first7=P.
|last8=Katz |first8=D.
|last9=Le Campion |first9=J. -F.
|display-authors=3
|title=Gaia Data Release 2. The catalogue of radial velocity standard stars.
|journal=Astronomy and Astrophysics
|volume=616A
|issue=8|page=|date=2018
|doi=10.1051/0004-6361/201832795
|bibcode=2018A&A...616A...7S
|ref=harv
}} {{arXiv|1804.09370}}
</ref>
| propmotion =RA: 163.917 mas/yr<ref name=simbad/><ref name=Gaia/><br/>Dec: 5.000 mas/yr<ref name=simbad/><ref name=Gaia/>
| parallax =33.3383 ± 0.1196 mas<ref name=simbad/><ref name=Gaia/>
}}
'''Eta Arietis''' (17 Arietis, η Ari, HD 13555) is a [[main sequence star]] in the [[constellation]] of [[Aries]], the [[ram]].<ref name=theskylive>{{cite web|url=https://theskylive.com/sky/stars/eta-arietis-star|title=Eta Arietis|publisher=theskylive.com}}</ref> It is one of the closest stars to the [[Sun]] at just 94.16 [[light year]]s from [[Earth]]. Its name comes from the [[Bayer designation|Bayer]] method of naming stars. The [[Greek alphabet|Greek]] first letter indicates the brightness of the star comapred to others in the constellation, with higher letters indicating dimmer stars. As such Eta Arietis is one of the dimmer stars in the constellation. It can be observed with the unaided eye in the Northern hemisphere, but its faintness means that dark skies with little to no [[light pollution]] are required.
The star is thought to be quite similar to the [[Sun]], with a radius 1.91 larger and a surface temperature slightly higher at 6,500 kelvin.<ref name=universeguide/> These combine to mean Eta Arietis emits 6 times more radiation the Sol.
==References==
{{reflist}}
{{Stars}}
[[Category:Astronomy]]
[[Category:Stars]]