Nu Aurigae

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Variable star in the constellation Auriga

title: "Nu Aurigae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["g-type-giants", "horizontal-branch-stars", "astrometric-binaries", "auriga", "bayer-objects", "bright-star-catalogue-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects"] description: "Variable star in the constellation Auriga" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Nu_Aurigae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Variable star in the constellation Auriga ::

| name = ν Aurigae | image= |image=Auriga constellation map.svg|alt=|float=center|width=260 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=ν Aurigae |x=414|y=466 | caption = Location of ν Aurigae (circled) | epoch = J2000 | ra = | dec = | appmag_v = 3.957 | constell = Auriga | type = red clump | class = G9.5 III Fe1 Ba0.2 + wd | r-i = 0.56 | v-r = | b-v = +1.138 | u-b = +1.084 | variable = | radial_v = +9.92 | prop_mo_ra = +7.958 | prop_mo_dec = +0.713 | pm_footnote = | parallax = 16.1414 | p_error = 0.4427 | parallax_footnote = | absmag_v = −0.27 | mass = 2.12 | radius = | luminosity = | temperature = | metal_fe = −0.14 | gravity = 2.4 | rotational_velocity = 5.0 | age_gyr = 1.11 | names = | Simbad = nu+Aur

Nu Aurigae is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinised from ν Aurigae, and abbreviated Nu Aur or ν Aur. This star is visible to the naked eye with an apparent visual magnitude of 3.96. Based on parallax measurements, it is approximately 202 ly distant from the Earth. The star is drifting further away from the Sun with a radial velocity of +10 km/s.

This is an evolved giant star with a stellar classification of G9.5 III. At 1.1 billion years of age, it is a red clump star that is generating energy through the fusion of helium at its core. Its outer envelope has expanded to 18 times the radius of the Sun and cooled to , giving it the characteristic yellow-hued glow of a G-type star. It shines with 126 times the luminosity of the Sun and has 2.12 times the Sun's mass.

This is an astrometric binary with a suspected white dwarf companion. Radial velocity variations suggest an orbital period of 7370 ± with a large eccentricity of 0.71. A 10th-magnitude star 54.6 arcseconds away is an optical companion.

References

| title=Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer | last1=Baines | first1=Ellyn K. | last2=Thomas Armstrong | first2=J. | last3=Clark | first3=James H. | last4=Gorney | first4=Jim | last5=Hutter | first5=Donald J. | last6=Jorgensen | first6=Anders M. | last7=Kyte | first7=Casey | last8=Mozurkewich | first8=David | last9=Nisley | first9=Ishara |last10=Sanborn | first10=Jason | last11=Schmitt | first11=Henrique R. |last12=Van Belle | first12=Gerard T. | display-authors=1 | journal=The Astronomical Journal | date=2021 |volume=162 |issue=5 |page=198 | doi=10.3847/1538-3881/ac2431 |doi-access=free | bibcode=2021AJ....162..198B | arxiv=2211.09030 }}

| title=Abundances in the Local Region. I. G and K Giants | last1=Luck | first1=R. Earle | journal=Astronomical Journal | volume=150 | issue=3 | at=88 | year=2015 | bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 | arxiv=1507.01466 | s2cid=118505114 | postscript=. }}

| 27673 | mode=cs2 | postscript=.}}

| title=BRITE photometry and STELLA spectroscopy of bright stars in Auriga: Rotation, pulsation, orbits, and eclipses⋆ | last1=Strassmeier | first1=K. G. | last2=Granzer | first2=T. | last3=Weber | first3=M. | last4=Kuschnig | first4=R. | last5=Pigulski | first5=A. | last6=Popowicz | first6=A. | last7=Moffat | first7=A. F. J. | last8=Wade | first8=G. A. | last9=Zwintz | first9=K. | last10=Handler | first10=G. | display-authors=1 | journal=Astronomy & Astrophysics | volume=644 | at=id. A104 | date=December 2020 | doi=10.1051/0004-6361/202039310 | arxiv=2010.10092 | bibcode=2020A&A...644A.104S }}

References

  1. {{Cite DR3. 3458053271535395712
  2. (January 2008). "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity". The Astronomical Journal.
  3. (1962). "Space-velocity vectors for 3483 stars with proper motion and radial velocity". Royal Observatory Bulletin.
  4. (August 1986). "UBV photometry of stars whose positions are accurately known. III". Astronomy and Astrophysics Supplement Series.
  5. (March 2023). ["A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample"](http://orbi.ulg.ac.be/jspui/handle/2268/142442 }}{{Dead link). Astronomy and Astrophysics.
  6. (September 2008). "A catalogue of multiplicity among bright stellar systems". [[Monthly Notices of the Royal Astronomical Society]].
  7. "* 32 Aur".
  8. (December 21, 2004). "The Colour of Stars". [[Commonwealth Scientific and Industrial Research Organisation]].

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

g-type-giantshorizontal-branch-starsastrometric-binariesaurigabayer-objectsbright-star-catalogue-objectsdurchmusterung-objectsflamsteed-objectshenry-draper-catalogue-objectshipparcos-objects