omicron Aurigae

{{Starbox begin

| name = Omicron Aurigae

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Auriga

| ra = {{RA|05|45|54.042}}

| dec = {{DEC|+49|49|34.58}}

| appmag_v = +5.47

}}

{{Starbox character

| class = {{nowrap|A1 Cr Eu}}

| b-v = +0.02

| u-b = +0.02

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−7.7|0.9}}

| prop_mo_ra = −11.087

| prop_mo_dec = +3.703

| pm_footnote =

| parallax = 8.1876

| p_error = 0.2643

| parallax_footnote =

| absmag_v = −0.03

}}

{{Starbox detail

| source =

| mass = 1.9

| radius = 3.2

| luminosity = 50

| temperature = 8,300

| gravity = 3.7

| metal_fe =

| rotational_velocity = 35.2{{±|5.3}}

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | B=ο Aur | F=27 Aur | BD=+49°1398 | FK5=216 | HD=38104 | HIP=27196 | HR=1971 | SAO=40583 }}

}}

{{Starbox reference

| Simbad = omi+Aur

}}

Omicron Aurigae is an astrometric binary star system in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ο Aurigae, and abbreviated Omicron Aur or ο Aur. With an apparent visual magnitude of 5.47, it is faintly visible to the naked eye. Based upon an annual parallax shift of {{val|8.19|ul=mas}}, it is approximately {{Convert|400|ly|pc|abbr=off|lk=on}} distant from Earth. It is drifting closer to the Sun with a radial velocity of −8 km/s. The star is a member of the Ursa Major stream of co-moving stars.

The visible component is a chemically peculiar star with a stellar classification of {{nowrap|A1 Cr Eu}}; meaning this is an A-type star with a spectrum that shows anomalously high abundances of chromium (Cr) and europium (Eu). A magnetic field has been detected and it is a source of X-ray emission with a luminosity of: log L_x = 29.1. The star has 1.9 times the mass of the Sun and 3.2 times the Sun's radius. It is spinning with a projected rotational velocity of 35 km/s and is radiating 50 times the Sun's luminosity from its photosphere at an effective temperature of 8,300 K.

References

{{reflist|refs=

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{{Cite XHIP

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| arxiv=1208.3048 | s2cid=59451347 | postscript=. }}

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| title=UBVRIJKL photometry of the bright stars

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| volume=4 | issue=99 | pages=99 | year=1966

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{{citation

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| journal=Astronomy and Astrophysics | postscript=.

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| doi=10.1051/0004-6361/200810788 | bibcode=2009A&A...498..961R

| url=https://zenodo.org/record/890529 | doi-access=free }}

{{citation

| last1=Makarov | first1=V. V. | last2=Kaplan | first2=G. H.

| title=Statistical Constraints for Astrometric Binaries with Nonlinear Motion

| journal=The Astronomical Journal | postscript=.

| volume=129 | issue=5 | pages=2420–2427 | date=May 2005

| doi=10.1086/429590 | bibcode=2005AJ....129.2420M

| url=https://apps.dtic.mil/sti/pdfs/ADA433654.pdf

| archive-url=https://web.archive.org/web/20170924050424/http://www.dtic.mil/get-tr-doc/pdf?AD=ADA433654

| url-status=live | archive-date=September 24, 2017 | doi-access=free }}

{{citation | postscript=.

| title=Fundamental Parameters of CP Stars Observed at the 6-m Telescope. I. Observations in 2009–2011

| display-authors=1 | last1=Moiseeva | first1=A. V.

| last2=Romanyuk | first2=I. I. | last3=Semenko | first3=E. A.

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| journal=Astrophysical Bulletin

| volume=74 | issue=1 | pages=62–65 | date=January 2019

| doi=10.1134/S1990341319010061 | bibcode=2019AstBu..74...62M }}

{{cite simbad

| title=omi Aur

| access-date=2017-06-28 }}

}}

External links

[http://www.glyphweb.com/esky/default.htm?http://www.glyphweb.com/esky/stars/omicronaurigae.html The Electronic Sky]
[https://web.archive.org/web/20060417075020/http://www.astro.ufl.edu/~cohen/ast1002/table_19.html University of Florida Astronomy Department]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%201971 HR 1971]
[http://aladin.u-strasbg.fr/AladinPreview?-c=05+45+54.0387%2B49+49+34.519&ident=*+omi+Aur&submit=Aladin+previewer Image Omicron Aurigae]

Category:A-type main-sequence stars

Category:Chemically peculiar stars

Category:Astronomical X-ray sources

Category:Astrometric binaries

Category:Ursa Major moving group

Category:Durchmusterung objects

038104

027196