| 词条 | Nu Virginis |
| 释义 |
| name = ν Virginis }}{{Starbox image | image={{Location mark |image=Virgo constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=ν Virginis |x=906|y=308 }} |caption=Location of ν Virginis (circled) }}{{Starbox observe | epoch = J2000.0 | constell = Virgo | ra = {{RA|11|45|51.55957}} | dec = {{DEC|+06|31|45.7413}} | appmag_v = 4.04[3] }}{{Starbox character | class = M1 III[4] | b-v = +1.52[3] | u-b = +1.80[3] | variable = }}{{Starbox astrometry | radial_v = {{Val|50.19|0.30}}[7] | prop_mo_ra = −18.96 | prop_mo_dec = −181.56 | parallax = 11.10 | p_error = 0.18 | parallax_footnote = | absmag_v = −0.87[11] }}{{Starbox detail | mass = 1.6[12] | radius = 54[7] | luminosity = 631[7] | gravity = 1.0[7] | temperature = 4,009[7] | metal_fe = 0.06[7] | rotational_velocity = 3.8[7] | age_gyr = }}{{Starbox catalog | names = 3 Virginis, ν Vir, BD+07°2479, FK5 1302, HD 102212, HIP 57380, HR 4517, SAO 119035[19] }}{{Starbox reference | Simbad = nu.+Vir }}{{Starbox end}} Nu Virginis (ν Vir, ν Virginis) is a star in the zodiac constellation of Virgo. It has an apparent visual magnitude of 4.04[3] and can be seen with the naked eye. Because the star lies near the ecliptic it is subject to occultations by the Moon.[21] Parallax measurements provide an estimated distance of around 294 light years from the Sun. Nu Virginis is an M-type red giant with a stellar classification of M1 III.[4] It is an SRB-type[23] semiregular variable star with its brightness varying by 0.0125 in magnitude.[24] These variations have four periods lasting 11.1, 12.3, 16.8, and 23.7 days.[25] This star has about 1.6 times the mass of the sun, but it has expanded to 54 times the Sun's radius and shines 631 times as brightly as the Sun. The effective temperature of its outer atmosphere is 4,009 K.[12] References1. ^1 {{citation | title=A Catalog of Stellar Angular Diameters Measured by Lunar Occultation | last1=White | first1=Nathaniel M. | last2=Feierman | first2=Barry H. | journal=Astronomical Journal | postscript=. | volume=94 | page=751 | date=September 1987 | doi=10.1086/114513 | bibcode=1987AJ.....94..751W }} [1][2][3][4][5][6][7][8][9][10]2. ^1 2 {{citation | last1=Morgan | first1=W. W. | last2=Keenan | first2=P. C. | title=Spectral Classification | journal=Annual Review of Astronomy and Astrophysics | volume=11 | pages=29–50 | year=1973 | doi=10.1146/annurev.aa.11.090173.000333 | bibcode=1973ARA&A..11...29M | postscript=. }} 3. ^1 2 3 4 5 6 7 {{citation | display-authors=1 | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity | journal=The Astronomical Journal | volume=135 | issue=1 | pages=209–231 | date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M | postscript=. }} 4. ^1 2 {{cite conference | last1=Tsuji | first1=Takashi | contribution=Isotopic abundances of Carbon and Oxygen in Oxygen-rich giant stars | title=Convection in Astrophysics, Proceedings of IAU Symposium #239 held 21-25 August, 2006 in Prague, Czech Republic | editor1-first=F. | editor1-last=Kupka | editor2-first=I. | editor2-last=Roxburgh | editor3-first=K. | editor3-last=Chan | pages=307–310 | date=May 2007 | doi=10.1017/S1743921307000622 | bibcode=2007IAUS..239..307T | arxiv=astro-ph/0610180 | postscript=. | volume=2 | journal=Proceedings of the International Astronomical Union}} 5. ^1 {{citation | title=Long-term photometry and periods for 261 nearby pulsating M giants | display-authors=1 | last1=Tabur | first1=V. | last2=Bedding | first2=T. R. | last3=Kiss | first3=L. L. | last4=Moon | first4=T. T. | last5=Szeidl | first5=B. | last6=Kjeldsen | first6=H. | journal=Monthly Notices of the Royal Astronomical Society | volume=400 | issue=4 | pages=1945–1961 | date=December 2009 | doi=10.1111/j.1365-2966.2009.15588.x | bibcode=2009MNRAS.400.1945T | arxiv=0908.3228 | postscript=. }} 6. ^1 {{cite journal | last1=Koen | first1=Chris | last2=Eyer | first2=Laurent | title=New periodic variables from the Hipparcos epoch photometry | journal=Monthly Notices of the Royal Astronomical Society | volume=331 | issue=1 | pages=45–59 |date=March 2002 | doi=10.1046/j.1365-8711.2002.05150.x | bibcode=2002MNRAS.331...45K | arxiv=astro-ph/0112194 | postscript=. }} 7. ^1 {{citation | display-authors=1 | last1=Kazarovets | first1=E. V. | last2=Samus | first2=N. N. | last3=Durlevich | first3=O. V. | last4=Frolov | first4=M. S. | last5=Antipin | first5=S. V. | last6=Kireeva | first6=N. N. | last7=Pastukhova | first7=E. N. | title=The 74th Special Name-list of Variable Stars | journal=Information Bulletin on Variable Stars | issue=4659 | date=1999 | bibcode=1999IBVS.4659....1K | postscript=. }} 8. ^1 {{citation | title=The Wilson-Bappu effect: A tool to determine stellar distances | display-authors=1 | last1=Pace | first1=G. | last2=Pasquini | first2=L. | last3=Ortolani | first3=S. | journal=Astronomy and Astrophysics | volume=401 | pages=997–1007 | date=April 2003 | doi=10.1051/0004-6361:20030163 | bibcode=2003A&A...401..997P | arxiv=astro-ph/0301637 | postscript=. }} 9. ^1 2 3 4 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data | publisher=SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }} 10. ^1 {{cite simbad | title=* nu. Vir | accessdate=2016-09-08 | postscript=. }} }}{{Virgo|state=collapsed}} 9 : Bayer objects|Virgo (constellation)|M-type giants|Semiregular variable stars|Flamsteed objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects|Durchmusterung objects |
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