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{{Short description|Star in the constellation Columba}}
{{Short description|Star in the constellation Columba}}
{{Starbox begin
{{Starbox begin
| name = [[Henry Draper Catalogue|HD]] 47475
| name = [[Henry Draper Catalogue|HD]] 47475
}}
}}
{{Starbox observe
{{Starbox observe
| epoch = J2000
| epoch = J2000
| constell = [[Columba (constellation)|Columba]]
| constell = [[Columba (constellation)|Columba]]
| ra = {{RA|06|36|51.27}}<ref name = GaiaDR2/>
| ra = {{RA|06|36|51.27308}}<ref name = GaiaDR3/>
| dec = {{DEC|-41|33|25.7}}<ref name = GaiaDR2/>
| dec = {{DEC|-41|33|25.6990}}<ref name = GaiaDR3/>
| appmag_v = {{val|6.34|0.01}}<ref name = Tycho2000/>
| appmag_v = 6.34{{±|0.01}}<ref name = Tycho2000/>
}}
}}
{{Starbox character
{{Starbox character
| class = K0 II<ref name = Houk1978/>
| class = K0 II<ref name = Houk1978/>
| b-v = +1.15<ref name = Corben1966/>
| b-v = +1.15<ref name = Corben1966/>
| u-b =
| u-b =
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = {{val|15.77|0.17}}<ref name = GaiaDR2/>
| radial_v = 13.8{{±|0.4}}<ref name = Gontcharov2006/>
| parallax = 1.8945
| parallax = 1.835
| p_error = 0.0203
| p_error = 0.0171
| prop_mo_ra = +1.285
| prop_mo_ra = +1.235
| prop_mo_dec = +7.693
| prop_mo_dec = +7.745
| parallax_footnote = <ref name = GaiaDR2/>
| parallax_footnote = <ref name = GaiaDR3/>
| pm_footnote = <ref name = GaiaDR2/>
| pm_footnote = <ref name = GaiaDR3/>
| absmag_v = -2.01<ref name = XHIP/>
| absmag_v = −2.01<ref name = XHIP/>
}}
}}
{{Starbox detail
{{Starbox detail
| mass = {{val|4.04|0.57}}<ref name = Hohle2010/>
| mass = 4.04{{±|0.57}}<ref name = Hohle2010/>
| radius = {{val|45.96|1.62|1.31}}<ref name = GaiaDR2/>
| radius = {{val|45.96|1.62|1.31}}<ref name = GaiaDR2/>
| luminosity = {{val|943|19}}<ref name = GaiaDR2/>
| luminosity = 726<ref name = McDonald2012/>
| temperature = {{val|4718|69|81|fmt=commas}}<ref name = GaiaDR2/>
| temperature = 4,845{{±|122}}<ref name = Stassun2019/>
| gravity = 1.79<ref name = Anders2019/>
| gravity = 1.79<ref name = Anders2019/>
| metal_fe = -0.23<ref name = Anders2019/>
| metal_fe = −0.3<ref name = Lebre2006/>
| rotational_velocity = {{val|5|2}}<ref name = Med2014/>
| rotational_velocity = 5.5{{±|2}}<ref name = "De Medeiros2014"/>
}}
}}
{{Starbox catalog
{{Starbox catalog
Line 48: Line 48:


==References==
==References==
{{reflist|30em|refs =
{{reflist||refs =

<ref name = GaiaDR3>{{Cite DR3|5569655079115879424}}</ref>


<ref name = GaiaDR2>{{Cite DR2|5569655079115879424}}</ref>
<ref name = GaiaDR2>{{Cite DR2|5569655079115879424}}</ref>


<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 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773706110065 | pmid = | bibcode = 2006AstL...32..759G | arxiv = 1606.08053 | s2cid = 119231169 }}</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=1 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 = Houk1978>{{cite book |last1=Houk |first1=Nancy |title=Michigan catalogue of two-dimensional spectral types for the HD stars |date=1 January 1978 |bibcode=1978mcts.book.....H }}</ref>

⚫
<ref name = Houk1978>{{cite book |last1=Houk |first1=Nancy |title=Michigan catalogue of two-dimensional spectral types for the HD stars Volume II: Declinations −52° to −41° |year=1978 |bibcode=1978mcts.book.....H }}</ref>


<ref name = Corben1966>{{cite journal |last1=Corben |first1=P. M. |title=Photoelectric magnitudes and colours for bright southern stars |journal=Monthly Notes of the Astronomical Society of South Africa |date=1 January 1966 |volume=25 |pages=44 |bibcode=1966MNSSA..25...44C |issn=0024-8266}}</ref>
<ref name = Corben1966>{{cite journal |last1=Corben |first1=P. M. |title=Photoelectric magnitudes and colours for bright southern stars |journal=Monthly Notes of the Astronomical Society of South Africa |date=1 January 1966 |volume=25 |pages=44 |bibcode=1966MNSSA..25...44C |issn=0024-8266}}</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 <i>Gaia</i> DR2 stars brighter than <i>G</i> = 18| journal = Astronomy & Astrophysics | date = August 2019 | volume = 628 | page = A94 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201935765 | bibcode = 2019A&A...628A..94A | arxiv = 1904.11302 | doi-access = free}}</ref>
⚫
<ref name = Hohle2010>{{cite journal |last1=Hohle |first1=M. M. |last2=Neuhäuser |first2=R. |last3=Schutz |first3=B. F. |title=Masses and luminosities of O- and B-type stars and red supergiants |journal=Astronomische Nachrichten |date=1 April 2010 |volume=331 |issue=4 |pages=349–360 |doi=10.1002/asna.200911355 |bibcode=2010AN....331..349H |s2cid=111387483 |issn=0004-6337}}</ref>

<ref name = "De Medeiros2014">{{cite journal | last1 = De Medeiros | first1 = J. R. | last2 = Alves | first2 = S. | last3 = Udry | first3 = S. | last4 = Andersen | first4 = J. | last5 = Nordström | first5 = B. | last6 = Mayor | first6 = M. | title = A catalog of rotational and radial velocities for evolved stars | journal = Astronomy & Astrophysics | date = January 2014 | volume = 561 | page = A126 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201220762 | bibcode = 2014A&A...561A.126D | arxiv = 1312.3474 | doi-access = free}}</ref>

<ref name = XHIP>{{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 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}</ref>

⚫
<ref name = Hohle2010>{{cite journal | last1 = Hohle | first1 = M.M. | last2 = Neuhäuser | first2 = R. | last3 = Schutz | first3 = B.F. | title = Masses and luminosities of O- and B-type stars and red supergiants | journal = Astronomische Nachrichten | date = April 2010 | volume = 331 | issue = 4 | pages = 349–360 | issn = 0004-6337 | eissn = 1521-3994 | doi = 10.1002/asna.200911355 | bibcode = 2010AN....331..349H | arxiv = 1003.2335 }}</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 and Astrophysics |date=1 August 2019 |volume=628 |pages=A94 |doi=10.1051/0004-6361/201935765 |arxiv=1904.11302 |bibcode=2019A&A...628A..94A |s2cid=131780028 |issn=0004-6361}}</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 | page = 138 | eissn = 1538-3881 | doi = 10.3847/1538-3881/ab3467 | bibcode = 2019AJ....158..138S | arxiv = 1905.10694 | doi-access = free}}</ref>


<ref name = Med2014>{{cite journal |last1=De Medeiros |first1=J. R. |last2=Alves |first2=S. |last3=Udry |first3=S. |last4=Andersen |first4=J. |last5=Nordström |first5=B. |last6=Mayor |first6=M. |title=A catalog of rotational and radial velocities for evolved stars. V. Southern stars |journal=Astronomy and Astrophysics |date=1 January 2014 |volume=561 |pages=A126 |doi=10.1051/0004-6361/201220762 |arxiv=1312.3474 |bibcode=2014A&A...561A.126D |s2cid=54046583 |issn=0004-6361}}</ref>
<ref name = McDonald2012>{{cite journal |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Boyer |first3=M. L. |title=Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos |journal=Monthly Notices of the Royal Astronomical Society |date=21 November 2012 |volume=427 |issue=1 |pages=343–357 |doi=10.1111/j.1365-2966.2012.21873.x |issn=0035-8711 |bibcode=2012MNRAS.427..343M |arxiv=1208.2037 |doi-access=free}}</ref>


<ref name = XHIP>{{cite journal |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |title=XHIP: An extended hipparcos compilation |journal=Astronomy Letters |date=1 May 2012 |volume=38 |issue=5 |pages=331–346 |doi=10.1134/S1063773712050015 |arxiv=1108.4971 |bibcode=2012AstL...38..331A |s2cid=119257644 |issn=1063-7737}}</ref>
<ref name = Lebre2006>{{cite journal | last1 = Lèbre | first1 = A. | last2 = de Laverny | first2 = P. | last3 = do Nascimento Jr. | first3 = J. D. | last4 = De Medeiros | first4 = J. R. | title = Lithium abundances and rotational behavior for bright giant stars | journal = Astronomy & Astrophysics | date = 19 April 2006 | volume = 450 | issue = 3 | pages = 1173–1179 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361:20053485 | bibcode = 2006A&A...450.1173L | doi-access = free}}</ref>


}}
}}

Revision as of 18:31, 14 October 2022

HD 47475
Observation data
Epoch J2000      Equinox J2000
Constellation Columba
Right ascension 06h 36m 51.27308s[1]
Declination −41° 33′ 25.6990″[1]
Apparent magnitude (V) 6.34±0.01[2]
Characteristics
Spectral type K0 II[3]
B−V color index +1.15[4]
Astrometry
Radial velocity (Rv)13.8±0.4[5] km/s
Proper motion (μ) RA: +1.235 mas/yr[1]
Dec.: +7.745 mas/yr[1]
Parallax (π)1.835 ± 0.0171 mas[1]
Distance1,780 ± 20 ly
(545 ± 5 pc)
Absolute magnitude (MV)−2.01[6]
Details
Mass4.04±0.57[7] M☉
Radius45.96+1.62
−1.31[8] R☉
Luminosity726[9] L☉
Surface gravity (log g)1.79[10] cgs
Temperature4,845±122[11] K
Metallicity [Fe/H]−0.3[12] dex
Rotational velocity (v sin i)5.5±2[13] km/s
Other designations
111 G. Columbae, CD−41 2488, HD 47475, HIP 31063, HR 2445, SAO 218060
Database references
SIMBADdata

HD 47475 (HR 2445) is a solitary star located in the southern constellation Columba. With an apparent magnitude of 6.34, its barely visible to the naked eye under ideal conditions. The star is located 1,720 light years away from the Solar System, but is drifting away with a heliocentric radial velocity of 15.77 km/s.

Properties

HD 47475 has a classification of K0 II, which states its a bright giant that has exhausted hydrogen at its core and left the main sequence. It has 4.04 times the Sun's mass, but has expanded to 46 times the Sun's radius. It radiates at 943 times the Sun's luminosity from its enlarged photosphere from an effective temperature of 4,718 K. HD 47475 has a projected rotational velocity of 5 km/s, which is fast for its class. Hohle et al. suggests that HD 47475 was once a B-type main-sequence star.[7]

References

  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 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. ^ Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars Volume II: Declinations −52° to −41°. Bibcode:1978mcts.book.....H.
  4. ^ Corben, P. M. (1 January 1966). "Photoelectric magnitudes and colours for bright southern stars". Monthly Notes of the Astronomical Society of South Africa. 25: 44. Bibcode:1966MNSSA..25...44C. ISSN 0024-8266.
  5. ^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  6. ^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (April 2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. eISSN 1521-3994. ISSN 0004-6337.
  8. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  9. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
  10. ^ 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. eISSN 1432-0746. ISSN 0004-6361.
  11. ^ 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. eISSN 1538-3881.
  12. ^ Lèbre, A.; de Laverny, P.; do Nascimento Jr., J. D.; De Medeiros, J. R. (19 April 2006). "Lithium abundances and rotational behavior for bright giant stars". Astronomy & Astrophysics. 450 (3): 1173–1179. Bibcode:2006A&A...450.1173L. doi:10.1051/0004-6361:20053485. eISSN 1432-0746. ISSN 0004-6361.
  13. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361.
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