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Rescuing orphaned refs ("houk1978" from rev 1079520748)
Information about the spectral classes
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| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Telescopium]]
| constell = [[Telescopium]]
| ra = {{RA|19|48|01.19882}}<ref name=vanLeeuwen2007/>
| ra = {{RA|19|48|01.1977}}<ref name = EDR3/>
| dec = {{DEC|−56|21|45.3958}}<ref name=vanLeeuwen2007/>
| dec = {{DEC|−56|21|45.3996}}<ref name = EDR3/>
| appmag_v = 5.33{{±|0.01}}<ref name = Tycho2000/>
| appmag_v = 5.33{{±|0.01}}<ref name = Tycho2000/>
}}
}}
Line 14: Line 14:
| class = A7 III/IV<ref name = Houk1975/>
| class = A7 III/IV<ref name = Houk1975/>
| b-v = +0.20<ref name=Johnson1966/>
| b-v = +0.20<ref name=Johnson1966/>
| u-b =
| r-i =
| variable =
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v =
| radial_v = −12.4{{±|4.2}}<ref name = Gontcharov2006/>
| prop_mo_ra = +92.25<ref name=vanLeeuwen2007/>
| prop_mo_ra = +90.983
| prop_mo_dec = −136.72<ref name=vanLeeuwen2007/>
| prop_mo_dec = −137.406
| parallax = 20.18
| parallax = 19.3152
| p_error = 0.30
| p_error = 0.0783
| parallax_footnote = <ref name=vanLeeuwen2007/>
| parallax_footnote = <ref name = EDR3/>
| pm_footnote = <ref name = EDR3/>
| absmag_v = +1.86<ref name=Anderson2012/>
| absmag_v = +1.86<ref name=Anderson2012/>
}}
}}
Line 39: Line 37:
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = {{odlist | B=ν Tel | CP=−56° 9290 | FK5=739 | HD=186543 | HIP=97421 | HR=7510 | SAO=246271 }}<ref name=SIMBAD/>
| names = {{odlist | B=ν Tel | CP=−56° 9290 | FK5=739 | HD=186543 | HIP=97421 | HR=7510 | SAO=246271 | Gould = 67 G. Telescopii}}<ref name=SIMBAD/><ref name = Gould1879/>
}}
}}
{{Starbox reference
{{Starbox reference
Line 45: Line 43:
}}
}}
{{Starbox end}}
{{Starbox end}}
'''Nu Telescopii''' (ν Telescopii) is a solitary,<ref name=Eggleton2008/> white-hued [[star]] in the southern [[constellation]] of [[Telescopium]]. With an [[apparent visual magnitude]] of +5.35,<ref name=Johnson1966/> it is faintly visible to the naked eye. There is a faint magnitude 9.3 companion star at an [[angular separation]] of 102&nbsp;[[arc second]]s along a [[position angle]] of 333°, as of 2010.<ref name=WDSC2014/> The estimated distance to Nu Telescopii, based upon an annual [[stellar parallax|parallax shift]] of 20.18&nbsp;[[milliarcsecond|mas]],<ref name=vanLeeuwen2007/> is about 162&nbsp;[[light year]]s.
'''Nu Telescopii''' (ν Telescopii) is a solitary<ref name=Eggleton2008/> [[star]] in the southern [[constellation]] [[Telescopium]]. It has an [[apparent visual magnitude]] of 5.33,<ref name=Johnson1966/> allowing it to be faintly visible to the [[naked eye]]. The object is relatively close at a distance of 169 [[light year]]s but is approaching the [[Solar System]] with a heliocentric [[radial velocity]] of about {{val|-12|ul=km/s}}.<ref name = Gontcharov2006/>


There hasn't been much agreement on Nu Telescopii's [[spectral classification]]. It was initially categorized as [[Am star]], with a classification of kA4mF3IV:<ref name = Hoffleit1953/> . This indicates that the object has the [[calcium K-line]]s of an A4 star and the metallic lines of a F3 [[subgiant]]. However, Nu Telescopii was shown not to have a peculiar spectrum and was given a class of A9 Vn,<ref name = Evans1966/> indicating that it is an [[A-type main-sequence star]] displaying broad (nebulous) [[absorption lines]] due to rapid rotation. It has since been classified as A7 with either a blended [[luminosity class]] of a [[giant star]] or [[subgiant]] (III/IV)<ref name = Houk1975/> or only [[subgiant]] (IV).<ref name = Abt1995/>
At the age of around 686&nbsp;million years,<ref name=David2015/> Nu Telescopii shows the [[stellar spectrum|spectral]] characteristics of an [[stellar evolution|evolving]] [[A-type star]] with a [[stellar classification]] of A7&nbsp;III–IV.<ref name=houk1978>{{citation

| last1=Houk | first1=Nancy | last2=Cowley | first2=A. P.
⚫
with of an [[stellar evolution|evolving]] [[A-type star]] with a [[stellar classification]] of A7&nbsp;III–IV.<ref name=houk1978/> Here, the [[luminosity class]] of III–IV indicates mixed traits of a [[subgiant star|subgiant]] and a [[giant star]]. It has about 1.85<ref name=David2015/> times the [[mass of the Sun]] and 2.1<ref name=Masana2006/> times the [[Sun's radius]]. Based upon its motion through space, it is a candidate for membership in the [[IC 2391]] supercluster.<ref name=Eggen1995/>
| title=Michigan catalogue of two-dimensional spectral types for the HD stars

| volume=1 | publication-place=Ann Arbor
There is a faint magnitude 9.3 companion star at an [[angular separation]] of 102&nbsp;[[arc second]]s along a [[position angle]] of 333°, as of 2010.<ref name = Mason2001/>
| publisher=Dept. of Astronomy, University of Michigan
⚫
| year=1978 | bibcode=1975mcts.book.....H | postscript=. }}</ref> Here, the [[luminosity class]] of III–IV indicates mixed traits of a [[subgiant star|subgiant]] and a [[giant star]]. It has about 1.85<ref name=David2015/> times the [[mass of the Sun]] and 2.1<ref name=Masana2006/> times the [[Sun's radius]]. Based upon its motion through space, it is a candidate for membership in the [[IC 2391]] supercluster.<ref name=Eggen1995/>


==References==
==References==
{{reflist|refs=
{{reflist|refs=


<ref name = EDR3>{{Cite Gaia EDR3|6448574845812814080}}</ref>
<ref name=vanLeeuwen2007>{{citation

| title=Validation of the new Hipparcos reduction
<ref name = Gontcharov2006>{{cite journal |last1=Gontcharov |first1=G. A. |title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system |journal=Astronomy Letters |date=November 2006 |volume=32 |issue=11 |pages=759–771 |doi=10.1134/S1063773706110065 |issn=1063-7737 |bibcode=2006AstL...32..759G |arxiv=1606.08053|s2cid=119231169 }}</ref>
| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>


<ref name = Tycho2000>{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=March 2000 |volume=355 |pages=L27–L30 |bibcode=2000A&A...355L..27H |issn=0004-6361 }}</ref>
<ref name = Tycho2000>{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=March 2000 |volume=355 |pages=L27–L30 |bibcode=2000A&A...355L..27H |issn=0004-6361 }}</ref>


<ref name = Mason2001>{{cite journal |last1=Mason |first1=Brian D. |last2=Wycoff |first2=Gary L. |last3=Hartkopf |first3=William I. |last4=Douglass |first4=Geoffrey G. |last5=Worley |first5=Charles E. |title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog |journal=The Astronomical Journal |date=December 2001 |volume=122 |issue=6 |pages=3466–3471 |doi=10.1086/323920 |issn=0004-6256 |bibcode=2001AJ....122.3466M |doi-access=free}}</ref>
<ref name=WDSC2014>{{citation
| display-authors=1 | last1=Mason | first1=B. D.
| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.
| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.
| title=The Washington Visual Double Star Catalog
| year=2014 | bibcode=2001AJ....122.3466M
| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds
| accessdate=2015-07-22 | doi=10.1086/323920 | doi-access=free }}</ref>


<ref name=Eggen1995>{{citation
<ref name=Eggen1995>{{citation
Line 92: Line 78:


<ref name = Houk1975>{{cite book |last1=Houk |first1=N. |last2=Cowley |first2=A. P. |title=University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. |date=1975 |bibcode=1975mcts.book.....H }}</ref>
<ref name = Houk1975>{{cite book |last1=Houk |first1=N. |last2=Cowley |first2=A. P. |title=University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. |date=1975 |bibcode=1975mcts.book.....H }}</ref>

<ref name = Hoffleit1953>{{cite journal |last1=Hoffleit |first1=Dorrit |title=The spectra and absolute magnitudes of 500 A3 - G2 stars |journal=Annals of Harvard College Observatory |date=1953 |volume=0119 |pages=1–35 |bibcode=1953AnHar.119....1H}}</ref>

<ref name = Evans1966>{{cite journal |last1=Evans |first1=D. S. |title=Fundamental data for Southern stars (6th list). |journal=Royal Greenwich Observatory Bulletins |date=1966 |volume=110 |pages=185 |bibcode=1966RGOB..110..185E}}</ref>

<ref name = Abt1995>{{cite journal |last1=Abt |first1=Helmut A. |last2=Morrell |first2=Nidia I. |title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars |journal=The Astrophysical Journal Supplement Series |date=July 1995 |volume=99 |pages=135 |doi=10.1086/192182 |issn=0067-0049 |bibcode=1995ApJS...99..135A |doi-access=free}}</ref>


<ref name=Johnson1966>{{citation | display-authors=1
<ref name=Johnson1966>{{citation | display-authors=1
Line 117: Line 109:
| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}</ref>
| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}</ref>


<ref name = Anderson2012>{{cite journal |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |title=XHIP: An extended hipparcos compilation |journal=Astronomy Letters |date=May 2012 |volume=38 |issue=5 |pages=331–346 |doi=10.1134/S1063773712050015 |language=en |issn=1063-7737 |bibcode=2012AstL...38..331A |arxiv=1108.4971|s2cid=119257644 }}</ref>
<ref name=Anderson2012>{{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 | s2cid=119257644 | postscript=. }}</ref>


<ref name=SIMBAD>{{cite simbad
<ref name=SIMBAD>{{cite simbad
| title=nu. Tel
| title=nu. Tel
| accessdate=2017-06-01 | postscript=. }}</ref>
| accessdate=2017-06-01 | postscript=. }}</ref>

<ref name = Gould1879>{{cite journal | last=Gould | first=Benjamin Apthorp | title=Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas | journal=Resultados del Observatorio Nacional Argentino | volume=1 | bibcode=1879RNAO....1.....G | year=1878 | page=}}</ref>


}}
}}

Revision as of 00:59, 24 June 2022

Nu Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 48m 01.1977s[1]
Declination −56° 21′ 45.3996″[1]
Apparent magnitude (V) 5.33±0.01[2]
Characteristics
Spectral type A7 III/IV[3]
B−V color index +0.20[4]
Astrometry
Radial velocity (Rv)−12.4±4.2[5] km/s
Proper motion (μ) RA: +90.983 mas/yr[1]
Dec.: −137.406 mas/yr[1]
Parallax (π)19.3152 ± 0.0783 mas[1]
Distance168.9 ± 0.7 ly
(51.8 ± 0.2 pc)
Absolute magnitude (MV)+1.86[6]
Details
Mass1.85[7] M☉
Radius2.109±0.078[8] R☉
Luminosity15.2[6] L☉
Surface gravity (log g)4.22[7] cgs
Temperature8,199±279[7] K
Age686[7] Myr
Other designations
ν Tel, 67 G. Telescopii, CPD−56° 9290, FK5 739, HD 186543, HIP 97421, HR 7510, SAO 246271[9][10]
Database references
SIMBADdata

Nu Telescopii (ν Telescopii) is a solitary[11] star in the southern constellation Telescopium. It has an apparent visual magnitude of 5.33,[4] allowing it to be faintly visible to the naked eye. The object is relatively close at a distance of 169 light years but is approaching the Solar System with a heliocentric radial velocity of about −12 km/s.[5]

There hasn't been much agreement on Nu Telescopii's spectral classification. It was initially categorized as Am star, with a classification of kA4mF3IV:[12] . This indicates that the object has the calcium K-lines of an A4 star and the metallic lines of a F3 subgiant. However, Nu Telescopii was shown not to have a peculiar spectrum and was given a class of A9 Vn,[13] indicating that it is an A-type main-sequence star displaying broad (nebulous) absorption lines due to rapid rotation. It has since been classified as A7 with either a blended luminosity class of a giant star or subgiant (III/IV)[3] or only subgiant (IV).[14]

with of an evolving A-type star with a stellar classification of A7 III–IV.[15] Here, the luminosity class of III–IV indicates mixed traits of a subgiant and a giant star. It has about 1.85[7] times the mass of the Sun and 2.1[8] times the Sun's radius. Based upon its motion through space, it is a candidate for membership in the IC 2391 supercluster.[16]

There is a faint magnitude 9.3 companion star at an angular separation of 102 arc seconds along a position angle of 333°, as of 2010.[17]

References

  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  4. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
  5. ^ a b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  6. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b c d e David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
  8. ^ a b Masana, E.; et al. (2006), "Effective temperature scale and bolometric corrections from 2MASS photometry", Astronomy and Astrophysics, 450 (2): 735, arXiv:astro-ph/0601049, Bibcode:2006A&A...450..735M, doi:10.1051/0004-6361:20054021, S2CID 15278668.
  9. ^ "nu. Tel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-01.{{cite web}}: CS1 maint: postscript (link)
  10. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  11. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
  12. ^ Hoffleit, Dorrit (1953). "The spectra and absolute magnitudes of 500 A3 - G2 stars". Annals of Harvard College Observatory. 0119: 1–35. Bibcode:1953AnHar.119....1H.
  13. ^ Evans, D. S. (1966). "Fundamental data for Southern stars (6th list)". Royal Greenwich Observatory Bulletins. 110: 185. Bibcode:1966RGOB..110..185E.
  14. ^ Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049.
  15. ^ Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  16. ^ Eggen, Olin J. (December 1995), "Reality Tests of Superclusters in the Young Disk Population", Astronomical Journal, 110: 2862, Bibcode:1995AJ....110.2862E, doi:10.1086/117734.
  17. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.
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