Epsilon Telescopii: Difference between revisions
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{{Short description|Star in the constellation Telescopus}} |
{{Short description|Star in the constellation Telescopus}} |
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{{Starbox begin |
{{Starbox begin |
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| name = |
| name = [[Bayer designation|ε Telescopii]] |
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}} |
}} |
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{{Starbox observe |
{{Starbox observe |
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| epoch = [[J2000.0]] |
| epoch = [[J2000.0]] ([[International Celestial Reference System|ICRS]]) |
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| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]]) |
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| constell = [[Telescopium]] |
| constell = [[Telescopium]] |
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| ra = {{RA|18|11|13. |
| ra = {{RA|18|11|13.7612}}<ref name = EDR3/> |
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| dec = {{DEC|−45|57|15. |
| dec = {{DEC|−45|57|15.8824}}<ref name = EDR3/> |
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| appmag_v = 4. |
| appmag_v = 4.50{{±|0.01}}<ref name = Tycho2000/> |
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}} |
}} |
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{{Starbox character |
{{Starbox character |
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| class = K0 |
| class = K0 III<ref name=houk1978/> |
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| b-v = +1.01<ref name=Johnson1966/> |
| b-v = +1.01<ref name=Johnson1966/> |
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| u-b = +0.78<ref name=Johnson1966/> |
| u-b = +0.78<ref name=Johnson1966/> |
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}} |
}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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| radial_v = −26.3<ref name= |
| radial_v = −26.3{{±|0.8}}<ref name = Gontcharov2006/> |
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| prop_mo_ra = |
| prop_mo_ra = −18.837 |
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| prop_mo_dec = |
| prop_mo_dec = −38.102 |
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| parallax = |
| parallax = 8.0405 |
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| p_error = 0. |
| p_error = 0.321 |
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| parallax_footnote = <ref name= |
| parallax_footnote = <ref name = EDR3/> |
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| pm_footnote = <ref name = EDR3/> |
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| absmag_v = −1.00<ref name=Anderson2012/> |
| absmag_v = −1.00<ref name=Anderson2012/> |
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}} |
}} |
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{{Starbox reference|Simbad=eps+Tel}} |
{{Starbox reference|Simbad=eps+Tel}} |
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{{Starbox end}} |
{{Starbox end}} |
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'''Epsilon Telescopii''', [[Latinisation of names|Latinized]] from ε Telescopii, is a solitary,<ref name=Eggleton2008/> orange-hued [[star]] in the southern [[constellation]] of [[Telescopium]]. It is visible to the naked eye with an [[apparent visual magnitude]] of +4.53.<ref name=Johnson1966/> Based upon an annual [[stellar parallax|parallax shift]] of 7.80 [[milliarcsecond|mas]] as seen from Earth,<ref name= |
'''Epsilon Telescopii''', [[Latinisation of names|Latinized]] from ε Telescopii, is a solitary,<ref name=Eggleton2008/> orange-hued [[star]] in the southern [[constellation]] of [[Telescopium]]. It is visible to the naked eye with an [[apparent visual magnitude]] of +4.53.<ref name=Johnson1966/> Based upon an annual [[stellar parallax|parallax shift]] of 7.80 [[milliarcsecond|mas]] as seen from Earth,<ref name = EDR3/> it is located roughly 410 [[light year]]s from the [[Sun]], give or take 20 light years. |
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This an [[stellar evolution|evolved]] [[stellar classification|K-type]] [[giant star|giant]] with a [[stellar classification]] of K0 III.<ref name=houk1978/> It displays an [[infrared excess]], suggesting the presence of an orbiting disk of dust.<ref name=Zuckerman1995/> The star is radiating 293<ref name=Mcdonald2012/> times the [[solar luminosity|Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 4,996 K.<ref name=Alves2015/> It has a 13th magnitude optical companion at an [[angular separation]] of 16.30 [[arcsecond]]s along a [[position angle]] of 233°, as of 2000.<ref name=WDSC2014/> |
This an [[stellar evolution|evolved]] [[stellar classification|K-type]] [[giant star|giant]] with a [[stellar classification]] of K0 III.<ref name=houk1978/> It displays an [[infrared excess]], suggesting the presence of an orbiting disk of dust.<ref name=Zuckerman1995/> The star is radiating 293<ref name=Mcdonald2012/> times the [[solar luminosity|Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 4,996 K.<ref name=Alves2015/> It has a 13th magnitude optical companion at an [[angular separation]] of 16.30 [[arcsecond]]s along a [[position angle]] of 233°, as of 2000.<ref name=WDSC2014/> |
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{{reflist|refs= |
{{reflist|refs= |
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<ref name = EDR3>{{Cite Gaia EDR3|6719649408908407680}}</ref> |
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<ref name=vanLeeuwen2007>{{citation |
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| title=Validation of the new Hipparcos reduction |
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<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> |
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| last1=van Leeuwen | first1=F. |
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| journal=Astronomy and Astrophysics |
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| volume=474 | issue=2 | pages=653–664 | date=2007 |
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| arxiv=0708.1752 | bibcode=2007A&A...474..653V |
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| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref> |
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<ref name=WDSC2014>{{citation |
<ref name=WDSC2014>{{citation |
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| accessdate=2015-07-22 | doi=10.1086/323920 | doi-access=free }}</ref> |
| accessdate=2015-07-22 | doi=10.1086/323920 | doi-access=free }}</ref> |
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<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> |
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<ref name=Wilson1953>{{citation |
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| last=Wilson | first=Ralph Elmer | year=1953 |
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| title=General catalogue of stellar radial velocities |
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| journal=Washington | pages=0 |
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| publisher=[[Carnegie Institution of Washington]] |
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| bibcode=1953GCRV..C......0W | postscript=. }}</ref> |
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<ref name=Mcdonald2012>{{citation |
<ref name=Mcdonald2012>{{citation |
Revision as of 02:04, 23 June 2022
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Telescopium |
Right ascension | 18h 11m 13.7612s[1] |
Declination | −45° 57′ 15.8824″[1] |
Apparent magnitude (V) | 4.50±0.01[2] |
Characteristics | |
Spectral type | K0 III[3] |
U−B color index | +0.78[4] |
B−V color index | +1.01[4] |
Astrometry | |
Radial velocity (Rv) | −26.3±0.8[5] km/s |
Proper motion (μ) | RA: −18.837 mas/yr[1] Dec.: −38.102 mas/yr[1] |
Parallax (π) | 8.0405 ± 0.321 mas[1] |
Distance | 410 ± 20 ly (124 ± 5 pc) |
Absolute magnitude (MV) | −1.00[6] |
Details | |
Luminosity | 293[7] L☉ |
Surface gravity (log g) | 2.32±0.12[8] cgs |
Temperature | 4,996±42[8] K |
Metallicity [Fe/H] | −0.07±0.04[8] dex |
Other designations | |
Database references | |
SIMBAD | data |
Epsilon Telescopii, Latinized from ε Telescopii, is a solitary,[10] orange-hued star in the southern constellation of Telescopium. It is visible to the naked eye with an apparent visual magnitude of +4.53.[4] Based upon an annual parallax shift of 7.80 mas as seen from Earth,[1] it is located roughly 410 light years from the Sun, give or take 20 light years.
This an evolved K-type giant with a stellar classification of K0 III.[3] It displays an infrared excess, suggesting the presence of an orbiting disk of dust.[11] The star is radiating 293[7] times the Sun's luminosity from its photosphere at an effective temperature of 4,996 K.[8] It has a 13th magnitude optical companion at an angular separation of 16.30 arcseconds along a position angle of 233°, as of 2000.[12]
References
- ^ a b c d e 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.
- ^ 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.
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
- ^ 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b c d Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189. Per the comments in the paper, this lists the TS13 data.
- ^ "* eps Tel". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-07.
{{cite web}}
: CS1 maint: postscript (link) - ^ 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.
- ^ Zuckerman, B.; et al. (June 1995), "Luminosity Class III Stars with Excess Far-Infrared Emission", Astrophysical Journal Letters, 446: L79, Bibcode:1995ApJ...446L..79Z, doi:10.1086/187935.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22