# Nu1 Lupi

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Star in the constellation Lupus

Nu1 Lupi Location of ν1 Lupi (circled in red) Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) Constellation Lupus Right ascension 15h 22m 08.27124s[1] Declination −47° 55′ 40.0543″[1] Apparent magnitude (V) 5.01[2] Characteristics Spectral type F6 III-IV[3] U−B color index +0.04[2] B−V color index +0.50[2] Astrometry Proper motion (μ) RA: −141.19[1] mas/yr Dec.: −132.92[1] mas/yr Parallax (π) 27.89±0.33 mas[1] Distance 117 ± 1 ly (35.9 ± 0.4 pc) Absolute magnitude (MV) +2.32[4] Details Mass 1.67[5] M☉ Surface gravity (log g) 3.87±0.10[5] cgs Temperature 6,447±80[5] K Metallicity [Fe/H] 0.17±0.05[5] dex Rotational velocity (v sin i) 2.8±0.2[4] km/s Age 2.0[5] Gyr Other designations ν1 Lup, CD−47°9922, FK5 3211, HD 136351, HIP 75206, HR 5698, SAO 225703[6] Database references SIMBAD data

**Nu1 Lupi** (**ν1 Lup**) is a solitary[7] [star](/source/Star) in the southern [constellation](/source/Constellation) of [Lupus](/source/Lupus_(constellation)). It is visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 5.01.[2] It is a high [proper motion](/source/Proper_motion) star[8] with an annual [parallax shift](/source/Stellar_parallax) of 27.89[1] [mas](/source/Milliarcsecond) as seen from Earth, yielding a distance estimate of 117 [light years](/source/Light_year) from the [Sun](/source/Sun).

This is a two[5] billion year old [evolved](/source/Stellar_evolution) star with a [stellar classification](/source/Stellar_classification) of F6 III-IV,[3] indicating that the [spectrum](/source/Spectrum) has characteristics intermediate between a [subgiant](/source/Subgiant_star) and [giant star](/source/Giant_star). It is most likely the source of [X-ray emission](/source/X-ray_astronomy)[8] detected at these coordinates with a luminosity of 1.09×1029 erg s−1.[9] The star has an estimated 1.67[5] times the [mass of the Sun](/source/Solar_mass) and is spinning slowly with a [projected rotational velocity](/source/Projected_rotational_velocity) of 2.8 km/s.[4]

## See also

- [Nu2 Lupi](/source/Nu2_Lupi)

## References

1. ^ [***a***](#cite_ref-vanLeeuwen2007_1-0) [***b***](#cite_ref-vanLeeuwen2007_1-1) [***c***](#cite_ref-vanLeeuwen2007_1-2) [***d***](#cite_ref-vanLeeuwen2007_1-3) [***e***](#cite_ref-vanLeeuwen2007_1-4) [***f***](#cite_ref-vanLeeuwen2007_1-5) van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", *Astronomy and Astrophysics*, **474** (2): 653–664, [arXiv](/source/ArXiv_(identifier)):[0708.1752](https://arxiv.org/abs/0708.1752), [Bibcode](/source/Bibcode_(identifier)):[2007A&A...474..653V](https://ui.adsabs.harvard.edu/abs/2007A&A...474..653V), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20078357](https://doi.org/10.1051%2F0004-6361%3A20078357), [S2CID](/source/S2CID_(identifier)) [18759600](https://api.semanticscholar.org/CorpusID:18759600).

1. ^ [***a***](#cite_ref-Mermilliod1986_2-0) [***b***](#cite_ref-Mermilliod1986_2-1) [***c***](#cite_ref-Mermilliod1986_2-2) [***d***](#cite_ref-Mermilliod1986_2-3) Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", *Catalogue of Eggen's UBV Data*, [SIMBAD](/source/SIMBAD), [Bibcode](/source/Bibcode_(identifier)):[1986EgUBV........0M](https://ui.adsabs.harvard.edu/abs/1986EgUBV........0M).

1. ^ [***a***](#cite_ref-Gray2006_3-0) [***b***](#cite_ref-Gray2006_3-1) Gray, R. O.; et al. (2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", *[The Astronomical Journal](/source/The_Astronomical_Journal)*, **132** (1): 161–70, [arXiv](/source/ArXiv_(identifier)):[astro-ph/0603770](https://arxiv.org/abs/astro-ph/0603770), [Bibcode](/source/Bibcode_(identifier)):[2006AJ....132..161G](https://ui.adsabs.harvard.edu/abs/2006AJ....132..161G), [doi](/source/Doi_(identifier)):[10.1086/504637](https://doi.org/10.1086%2F504637), [S2CID](/source/S2CID_(identifier)) [119476992](https://api.semanticscholar.org/CorpusID:119476992).

1. ^ [***a***](#cite_ref-AmmlerVonEiff2012_4-0) [***b***](#cite_ref-AmmlerVonEiff2012_4-1) [***c***](#cite_ref-AmmlerVonEiff2012_4-2) Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", *Astronomy & Astrophysics*, **542**: A116, [arXiv](/source/ArXiv_(identifier)):[1204.2459](https://arxiv.org/abs/1204.2459), [Bibcode](/source/Bibcode_(identifier)):[2012A&A...542A.116A](https://ui.adsabs.harvard.edu/abs/2012A&A...542A.116A), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201118724](https://doi.org/10.1051%2F0004-6361%2F201118724), [S2CID](/source/S2CID_(identifier)) [53666672](https://api.semanticscholar.org/CorpusID:53666672).

1. ^ [***a***](#cite_ref-Bensby2014_5-0) [***b***](#cite_ref-Bensby2014_5-1) [***c***](#cite_ref-Bensby2014_5-2) [***d***](#cite_ref-Bensby2014_5-3) [***e***](#cite_ref-Bensby2014_5-4) [***f***](#cite_ref-Bensby2014_5-5) [***g***](#cite_ref-Bensby2014_5-6) Bensby, T.; et al. (2014), "Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", *Astronomy & Astrophysics*, **562** (A71): 28, [arXiv](/source/ArXiv_(identifier)):[1309.2631](https://arxiv.org/abs/1309.2631), [Bibcode](/source/Bibcode_(identifier)):[2014A&A...562A..71B](https://ui.adsabs.harvard.edu/abs/2014A&A...562A..71B), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201322631](https://doi.org/10.1051%2F0004-6361%2F201322631), [S2CID](/source/S2CID_(identifier)) [118786105](https://api.semanticscholar.org/CorpusID:118786105).

1. **[^](#cite_ref-SIMBAD_6-0)** ["* nu.01 Lup"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+nu.01+Lup). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2017-03-08.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: postscript ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_postscript))

1. **[^](#cite_ref-Eggleton2008_7-0)** Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", *[Monthly Notices of the Royal Astronomical Society](/source/Monthly_Notices_of_the_Royal_Astronomical_Society)*, **389** (2): 869–879, [arXiv](/source/ArXiv_(identifier)):[0806.2878](https://arxiv.org/abs/0806.2878), [Bibcode](/source/Bibcode_(identifier)):[2008MNRAS.389..869E](https://ui.adsabs.harvard.edu/abs/2008MNRAS.389..869E), [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2008.13596.x](https://doi.org/10.1111%2Fj.1365-2966.2008.13596.x), [S2CID](/source/S2CID_(identifier)) [14878976](https://api.semanticscholar.org/CorpusID:14878976).

1. ^ [***a***](#cite_ref-Haakonsen2009_8-0) [***b***](#cite_ref-Haakonsen2009_8-1) Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", *The Astrophysical Journal Supplement*, **184** (1): 138–151, [arXiv](/source/ArXiv_(identifier)):[0910.3229](https://arxiv.org/abs/0910.3229), [Bibcode](/source/Bibcode_(identifier)):[2009ApJS..184..138H](https://ui.adsabs.harvard.edu/abs/2009ApJS..184..138H), [doi](/source/Doi_(identifier)):[10.1088/0067-0049/184/1/138](https://doi.org/10.1088%2F0067-0049%2F184%2F1%2F138), [S2CID](/source/S2CID_(identifier)) [119267456](https://api.semanticscholar.org/CorpusID:119267456).

1. **[^](#cite_ref-Pizzolato2000_9-0)** Pizzolato, N.; et al. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", *Astronomy and Astrophysics*, **361**: 614–628, [Bibcode](/source/Bibcode_(identifier)):[2000A&A...361..614P](https://ui.adsabs.harvard.edu/abs/2000A&A...361..614P).

v t e Constellation of Lupus List of stars in Lupus Lupus in Chinese astronomy Stars Bayer α (Uridim) β γ δ ε ζ η θ ι κ λ μ ν1 ν2 ξ ο π ρ σ τ1 τ2 υ φ1 φ2 χ ψ1 ψ2 ω Flamsteed 1 (i) 2 (f) Variable RU EX GG GQ HR II IL IM KT (d) V407 V462 HR 5362 5364 5401 5651 (e) 5724 (k) 5825 (g) 5943 5967 HD 134004 135344 136164 141943 142527 143811 Other Gliese 588 HIP 70849 Lupus-TR-3 SSSPM J1549−3544 WASP-132 Exoplanets GQ Lupi b HIP 70849 b Lupus-TR-3b WASP-178b Star clusters NGC 5749 NGC 5822 NGC 5824 NGC 5927 NGC 5986 Nebulae IC 4406 NGC 5882 Galaxies IC 4444 NGC 5530 NGC 5643 Astronomical events SN 1006 Category

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Adapted from the Wikipedia article [Nu1 Lupi](https://en.wikipedia.org/wiki/Nu1_Lupi) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Nu1_Lupi?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.