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| name = υ Aurigae
}}{{Starbox image
| image={{Location mark
|image=Auriga constellation map.svg|alt=|float=center|width=260
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=υ Aurigae
|x=414|y=518
}}
|caption=Location of υ Aurigae (circled)
}}{{Starbox observe
| epoch = J2000
| ra = {{RA|05|51|02.43724}}
| dec = {{DEC|+37|18|20.0565}}
| appmag_v = 4.74[3]
| constell = Auriga
}}{{Starbox character
| class = M0 III[4]
| r-i = 1.07
| v-r =
| b-v = +1.62[3]
| u-b = +1.93[3]
| variable =
}}{{Starbox astrometry
| radial_v = +37.68[7]
| prop_mo_ra = +36.85
| prop_mo_dec = -45.52
| parallax = 6.24
| p_error = 0.65
| parallax_footnote =
| absmag_v = −1.28[11]
}}{{Starbox detail
| mass =
| radius = 73[12]
| luminosity = 937[13]
| temperature = 3,800[14]
| gravity = {{Val|1.16|0.04|0.08}}[14]
| metal_fe =
| rotational_velocity =
| age_gyr =
}}{{Starbox catalog
| names = υ Aur, 31 Aurigae, BD+37 1336, FK5 2440, HD 38944, HIP 27639, HR 2011, SAO 58496.[16]
}}{{Starbox reference
|Simbad=ups+Aur
}}{{Starbox end}}
Upsilon Aurigae, Latinized from υ Aurigae, is the Bayer designation for a star in the northern constellation of Auriga. It has an apparent visual magnitude of 4.74,[3] which means it is bright enough to be seen with the naked eye. Based upon parallax measurements made during the Hipparcos mission, this star is approximately {{Convert|520|ly|pc|abbr=off|lk=on}} distant from the Earth.
This is an evolved red giant star with a stellar classification of M0 III.[4] It is a suspected variable star[19] and is currently on the asymptotic giant branch, which means it is generating energy at its core through the fusion of helium.[20] The measured angular diameter of this star, after correction for limb darkening, is {{nowrap|4.24 ± 0.05 mas}}.[21] At the estimated distance of Upsilon Aurigae, this yields a physical size of about 73 times the radius of the Sun.[12]
References
1. ^1 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
2. ^1 2 3 4 {{citation | last1=Johnson | display-authors=1 | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | pages=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
3. ^1 {{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | issue=1 | pages=165–186 |date=January 2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | postscript=. }}
4. ^1 2 {{citation | last1=Keenan | first1=Philip C. | last2=Barnbaum | first2=Cecilia | title=Revision and Calibration of MK Luminosity Classes for Cool Giants by HIPPARCOS Parallaxes | journal=The Astrophysical Journal | volume=518 | issue=2 | pages=859–865 |date=June 1999 | doi=10.1086/307311 | bibcode=1999ApJ...518..859K | postscript=. }}
5. ^1 {{cite simbad | title=* ups Aur | accessdate=2012-08-23 | postscript=. }}
6. ^1 {{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | postscript=. }}
7. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=Birkhäuser | date=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R*) is given by::
8. ^1 {{citation | display-authors=1 | last1=Hamada | first1=K. | last2=Owaki | first2=N. | last3=Tamura | first3=K. | last4=Mizuno | first4=M. | last5=Nitou | first5=S. | last6=Inagoya | first6=S. | last7=Simoda | first7=M. | title=On the Variability of upsilon Aurigae | journal=Information Bulletin on Variable Stars | volume=1531 | page=1 |date=January 1979 | bibcode=1979IBVS.1531....1H | postscript=. }}
9. ^1 {{citation | last1=Eggen | first1=Olin J. | title=Asymptotic giant branch stars near the sun | journal=Astronomical Journal | volume=104 | issue=1 |date=July 1992 | pages=275–313 | doi=10.1086/116239 | bibcode=1992AJ....104..275E | postscript=. }}
10. ^1 2 {{citation | title=Age Determinations of Early-M Type Pre-Main Sequence Stars Using a High-Resolution Near-Infrared Spectroscopic Method | last1=Takagi | first1=Yuhei | last2=Itoh | first2=Yoichi | last3=Oasa | first3=Yumiko | last4=Sugitani | first4=Koji | journal=Publications of the Astronomical Society of Japan | volume=63 | issue=3 | pages=677–684 | date=June 2011 | doi=10.1093/pasj/63.3.677 | bibcode=2011PASJ...63..677T | display-authors=1 |postscript=. }}
11. ^1 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
Note: see VizieR catalogue I/311.[1][2][3][4][5][6][7][8][9][10][11]2. ^1 2 3 4 {{citation | last1=Johnson | display-authors=1 | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | pages=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
3. ^1 {{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | issue=1 | pages=165–186 |date=January 2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | postscript=. }}
4. ^1 2 {{citation | last1=Keenan | first1=Philip C. | last2=Barnbaum | first2=Cecilia | title=Revision and Calibration of MK Luminosity Classes for Cool Giants by HIPPARCOS Parallaxes | journal=The Astrophysical Journal | volume=518 | issue=2 | pages=859–865 |date=June 1999 | doi=10.1086/307311 | bibcode=1999ApJ...518..859K | postscript=. }}
5. ^1 {{cite simbad | title=* ups Aur | accessdate=2012-08-23 | postscript=. }}
6. ^1 {{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | postscript=. }}
7. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=Birkhäuser | date=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R*) is given by::
8. ^1 {{citation | display-authors=1 | last1=Hamada | first1=K. | last2=Owaki | first2=N. | last3=Tamura | first3=K. | last4=Mizuno | first4=M. | last5=Nitou | first5=S. | last6=Inagoya | first6=S. | last7=Simoda | first7=M. | title=On the Variability of upsilon Aurigae | journal=Information Bulletin on Variable Stars | volume=1531 | page=1 |date=January 1979 | bibcode=1979IBVS.1531....1H | postscript=. }}
9. ^1 {{citation | last1=Eggen | first1=Olin J. | title=Asymptotic giant branch stars near the sun | journal=Astronomical Journal | volume=104 | issue=1 |date=July 1992 | pages=275–313 | doi=10.1086/116239 | bibcode=1992AJ....104..275E | postscript=. }}
10. ^1 2 {{citation | title=Age Determinations of Early-M Type Pre-Main Sequence Stars Using a High-Resolution Near-Infrared Spectroscopic Method | last1=Takagi | first1=Yuhei | last2=Itoh | first2=Yoichi | last3=Oasa | first3=Yumiko | last4=Sugitani | first4=Koji | journal=Publications of the Astronomical Society of Japan | volume=63 | issue=3 | pages=677–684 | date=June 2011 | doi=10.1093/pasj/63.3.677 | bibcode=2011PASJ...63..677T | display-authors=1 |postscript=. }}
11. ^1 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
}}
External links
- HR 2011
- Image Upsilon Aurigae
8 : Henry Draper Catalogue objects|Hipparcos objects|Bayer objects|Auriga (constellation)|M-type giants|Flamsteed objects|HR objects|Durchmusterung objects
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