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{{Short description|Star in the constellation Chamaeleon}}
{{DISPLAYTITLE:Mu<sup>1</sup> Chamaeleontis}}
{{DISPLAYTITLE:Mu<sup>1</sup> Chamaeleontis}}
{{for2|other stars with this [[Bayer designation]]|[[Mu Chamaeleontis|μ Chamaeleontis]]}}
{{other stars by Bayer designation|Mu Chamaeleontis{{!}}μ Chamaeleontis}}
{{Starbox begin|name=μ<sup>1</sup> Chamaeleontis}}
'''Mu<sup>1</sup> Chamaeleontis''' (Mu<sup>1</sup> Cha), is a [[star]] located in the [[constellation]] [[Chamaeleon]]. Mu<sup>1</sup> Chamaeleontis is also known as '''HR 3983''', and '''HD 87971'''. Mu<sup>1</sup> Chamaeleontis is located at [[Right Ascension]] 10h 00m 42s and [[Declination]] -82 deg 12 arcmin 53 arcsec.
{{Starbox observe
| epoch = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Chamaeleon]]
| ra = {{RA|10|00|43.7937}}<ref name = EDR3/>
| dec = {{DEC|-82|12|52.8125}}<ref name = EDR3/>
| appmag_v = 5.53<ref name = Anderson2012/>
}}
{{Starbox character
| type =
| class = A0 IV<ref name=Houk1975/>
| b-v = +0.03<ref name = Johnson1966/>
| u-b = +0.05<ref name = Johnson1966/>
| variable =
}}
{{Starbox astrometry
| radial_v = 16{{±|10}}<ref name = Karchenko2007/>
| prop_mo_ra = −26.011
| prop_mo_dec = +31.141
| parallax = 8.0957
| p_error = 0.0795
| parallax_footnote = <ref name = EDR3/>
| pm_footnote = <ref name = EDR3/>
| absmag_v = +0.23<ref name = Anderson2012/>
}}
{{Starbox detail
| mass = 2.6<ref name = Anders2019/>
| radius = 3.66<ref name = Kervella2021/>
| gravity = 3.73<ref name = Anders2019/>
| metal_fe = −0.18<ref name = Anders2019/>
| age_myr =
| temperature = 10,141{{±|157|240}}<ref name = Stassun2019/>
| luminosity = 90.7<ref name = McDonald2017/>
| rotational_velocity = 150<ref name = Huang1953/>
}}
{{Starbox catalog
| names={{odlist | B=μ<sup>1</sup>&nbsp;Cha | CPD=-81° 399 | FK5=3980 | HD=87971 | HIP=49065 | HR=3983 | SAO=258554 }}<ref name=SIMBAD/>
}}
{{Starbox reference
| Simbad=mu+Cha
}}
{{Starbox end}}


Mu<sup>1</sup> Chamaeleontis is an A0IV [[subgiant star]] with an [[effective temperature]] of 9800 [[Kelvin]]. It has an [[apparent visual magnitude]] of +5.52, an [[absolute magnitude]] of +.0911 and a mass of 3.5 [[solar mass]]es. It is located 122 [[Parsec|pc]] (399 [[light year]]s) from the [[Sun]].
'''μ<sup>1</sup> Chamaeleontis''', [[Romanization of Greek|Latinized]] as '''Mu<sup>1</sup> Chamaeleontis''', is a single<ref name=Eggleton2008/> [[star]] in the southern [[circumpolar constellation]] [[Chamaeleon]]. It is dimly visible to the [[naked eye]] with an [[apparent visual magnitude]] of 5.53.<ref name=Anderson2012/> Based upon [[stellar parallax|parallax]] measurements, it is located approximately 403 [[light-year]]s away from the [[Sun]].<ref name = EDR3/> The [[radial velocity]] is poorly constrained, but it appears to be drifting further away at the rate of about {{val|16|ul=km/s}}<ref name = Karchenko2007/>

This object has a [[stellar classification]] of A0 IV,<ref name=Houk1975/> matching an [[A-type star|A-type]] [[subgiant]] star. It has 2.6 times the [[mass of the Sun]]<ref name = Anders2019/> and an [[effective temperature]] of {{val|10141|ul=K|fmt=commas}},<ref name = Stassun2019/> giving a bluish white glow. Due to its slightly enlarged [[radius]],<ref name = Kervella2021/> the star has a [[luminosity]] over 90 times that of the [[Sun]]<ref name = McDonald2017/> and spins rapidly with a [[projected rotational velocity]] of {{val|150|ul=km/s}}.<ref name = Huang1953/> Mu<sup>1</sup> Chamaeleontis' [[metallicity]] – elements heavier than [[helium]] – is 66% that of the Sun.<ref name = Anders2019/>


== References ==
== References ==
{{reflist|refs=
*http://www.alcyone.de/cgi-bin/search.pl?object=HR3983

*http://server3.wikisky.org/starview?object_type=1&object_id=3135
<ref name = EDR3>{{Cite Gaia EDR3|5192580796186293504}}</ref>
*http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+3983&submit=SIMBAD+search

<ref name=SIMBAD>{{cite simbad | title=mu. Cha}}</ref>

<ref name = Eggleton2008>{{cite journal | last1 = Eggleton | first1 = P. P. | last2 = Tokovinin | first2 = A. A. | title = A catalogue of multiplicity among bright stellar systems | journal = Monthly Notices of the Royal Astronomical Society | date = 11 September 2008 | volume = 389 | issue = 2 | pages = 869–879 | issn = 0035-8711 | eissn = 1365-2966 | doi = 10.1111/j.1365-2966.2008.13596.x | bibcode = 2008MNRAS.389..869E | arxiv = 0806.2878 | doi-access = free }}</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. |year=1975 |bibcode=1975mcts.book.....H }}</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=255204555 }}</ref>

<ref name = Johnson1966>{{cite journal |last1=Johnson |first1=H. L. |last2=Mitchell |first2=R. I. |last3=Iriarte |first3=B. |last4=Wisniewski |first4=W. Z. |title=UBVRIJKL Photometry of the Bright Stars |journal=Communications of the Lunar and Planetary Laboratory |year=1966 |volume=4 |pages=99–110 |bibcode=1966CoLPL...4...99J}}</ref>

<ref name = Karchenko2007>{{cite journal |last1=Kharchenko |first1=N.V. |last2=Scholz |first2=R.-D. |last3=Piskunov |first3=A.E. |last4=Röser |first4=S. |last5=Schilbach |first5=E. |title=Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations |journal=Astronomische Nachrichten |date=November 2007 |volume=328 |issue=9 |pages=889–896 |doi=10.1002/asna.200710776 |issn=0004-6337 |bibcode=2007AN....328..889K |arxiv=0705.0878 |doi-access=free}}</ref>

<ref name = Huang1953>{{cite journal | last1 = Huang | first1 = Su-Shu | title = A Statistical Study of the Rotation of the Stars. | journal = The Astrophysical Journal | date = September 1953 | volume = 118 | page = 285 | issn = 0004-637X | eissn = 1538-4357 | doi = 10.1086/145751 | bibcode = 1953ApJ...118..285H | doi-access = free}}</ref>

<ref name = Stassun2019>{{cite journal |display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=Lee |first6=Nathan De |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |last31=Sharma |first31=Sanjib |last32=Shiao |first32=Bernie |last33=Sozzetti |first33=Alessandro |last34=Stello |first34=Dennis |last35=Vanderspek |first35=Roland |last36=Wallace |first36=Geoff |last37=Winn |first37=Joshua N. |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=9 September 2019 |volume=158 |issue=4 |pages=138 |doi=10.3847/1538-3881/ab3467 |issn=0004-6256 |bibcode=2019AJ....158..138S |arxiv=1905.10694 |doi-access=free}}</ref>

<ref name = Anders2019>{{cite journal |display-authors=1 |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. |last5=Santiago |first5=B. X. |last6=Jordi |first6=C. |last7=Girardi |first7=L. |last8=Brown |first8=A. G. A. |last9=Matijevič |first9=G. |last10=Monari |first10=G. |last11=Cantat-Gaudin |first11=T. |last12=Weiler |first12=M. |last13=Khan |first13=S. |last14=Miglio |first14=A. |last15=Carrillo |first15=I. |last16=Romero-Gómez |first16=M. |last17=Minchev |first17=I. |last18=de Jong |first18=R. S. |last19=Antoja |first19=T. |last20=Ramos |first20=P. |last21=Steinmetz |first21=M. |last22=Enke |first22=H. |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 |journal=Astronomy & Astrophysics |date=August 2019 |volume=628 |pages=A94 |doi=10.1051/0004-6361/201935765 |issn=0004-6361 |bibcode=2019A&A...628A..94A |arxiv=1904.11302 |doi-access=free}}</ref>

<ref name = Kervella2021>{{cite journal | last1 = Kervella | first1 = Pierre | last2 = Arenou | first2 = Frédéric | last3 = Thévenin | first3 = Frédéric | title = Stellar and substellar companions from ''Gaia'' EDR3 | journal = Astronomy & Astrophysics | year = 2022 | volume = 657 | page = A7 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/202142146 | bibcode = 2022A&A...657A...7K | arxiv = 2109.10912 | doi-access = free}}</ref>

<ref name = McDonald2017>{{cite journal | last1 = McDonald | first1 = I. | last2 = Zijlstra | first2 = A. A. | last3 = Watson | first3 = R. A. | title = Fundamental parameters and infrared excesses of Tycho–Gaia stars | journal = Monthly Notices of the Royal Astronomical Society | date = 15 June 2017 | volume = 471 | issue = 1 | pages = 770–791 | issn = 0035-8711 | eissn = 1365-2966 | doi = 10.1093/mnras/stx1433 | bibcode = 2017MNRAS.471..770M | arxiv = 1706.02208 | doi-access = free }}</ref>

}}


{{Stars of Chamaeleon}}
{{Stars of Chamaeleon}}


{{DEFAULTSORT:Mu1 Chamaeleontis}}
⚫
[[Category:Chamaeleon (constellation)]]
⚫
[[Category:A-type subgiants]]
⚫
[[Category:Chamaeleon]]
[[Category:Bayer objects|Chamaeleontis, Mu1]]
[[Category:Bayer objects|Chamaeleontis, Mu1]]
[[Category:A-type subgiants|Chamaeleontis, Mu1]]
[[Category:Durchmusterung objects]]
⚫
[[Category:HR objects|3983]]
[[Category:Henry Draper Catalogue objects|087971]]
[[Category:Henry Draper Catalogue objects|087971]]
[[Category:Hipparcos objects|049065]]

[[Category:Bright Star Catalogue objects|3983]]

{{subgiant-star-stub}}

Latest revision as of 12:43, 9 January 2024

For other stars with this Bayer designation, see μ Chamaeleontis.
μ1 Chamaeleontis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 10h 00m 43.7937s[1]
Declination −82° 12′ 52.8125″[1]
Apparent magnitude (V) 5.53[2]
Characteristics
Spectral type A0 IV[3]
U−B color index +0.05[4]
B−V color index +0.03[4]
Astrometry
Radial velocity (Rv)16±10[5] km/s
Proper motion (μ) RA: −26.011 mas/yr[1]
Dec.: +31.141 mas/yr[1]
Parallax (π)8.0957 ± 0.0795 mas[1]
Distance403 ± 4 ly
(124 ± 1 pc)
Absolute magnitude (MV)+0.23[2]
Details
Mass2.6[6] M☉
Radius3.66[7] R☉
Luminosity90.7[8] L☉
Surface gravity (log g)3.73[6] cgs
Temperature10,141+157
−240[9] K
Metallicity [Fe/H]−0.18[6] dex
Rotational velocity (v sin i)150[10] km/s
Other designations
μ1 Cha, CPD−81° 399, FK5 3980, HD 87971, HIP 49065, HR 3983, SAO 258554[11]
Database references
SIMBADdata

μ1 Chamaeleontis, Latinized as Mu1 Chamaeleontis, is a single[12] star in the southern circumpolar constellation Chamaeleon. It is dimly visible to the naked eye with an apparent visual magnitude of 5.53.[2] Based upon parallax measurements, it is located approximately 403 light-years away from the Sun.[1] The radial velocity is poorly constrained, but it appears to be drifting further away at the rate of about 16 km/s[5]

This object has a stellar classification of A0 IV,[3] matching an A-type subgiant star. It has 2.6 times the mass of the Sun[6] and an effective temperature of 10,141 K,[9] giving a bluish white glow. Due to its slightly enlarged radius,[7] the star has a luminosity over 90 times that of the Sun[8] and spins rapidly with a projected rotational velocity of 150 km/s.[10] Mu1 Chamaeleontis' metallicity – elements heavier than helium – is 66% that of the Sun.[6]

References

[edit]
  1. ^ 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.
  2. ^ a b c 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 255204555.
  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.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  5. ^ a b Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. ISSN 0004-6337.
  6. ^ a b c d e Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
  7. ^ a b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
  8. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. eISSN 1365-2966. ISSN 0035-8711.
  9. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
  10. ^ a b Huang, Su-Shu (September 1953). "A Statistical Study of the Rotation of the Stars". The Astrophysical Journal. 118: 285. Bibcode:1953ApJ...118..285H. doi:10.1086/145751. eISSN 1538-4357. ISSN 0004-637X.
  11. ^ "mu. Cha". SIMBAD. Centre de données astronomiques de Strasbourg.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711.
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