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Coordinates: Sky map 00h 05m 03.80s, −00° 30′ 11.0″
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A little update :D I don't know how you screwed up the parallax!
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| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| equinox = [[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Pisces (constellation)|Pisces]]
| constell = [[Pisces (constellation)|Pisces]]
| ra = {{RA|00|05|03.82339}}<ref name=GaiaDR2/>
| ra = {{RA|00|05|03.82339}}<ref name = EDR3/>
| dec = {{DEC|−00|30|10.9306}}<ref name=GaiaDR2/>
| dec = {{DEC|−00|30|10.9306}}<ref name = EDR3/>
| appmag_v = 6.32<ref name=Anderson2012/>
| appmag_v = 6.30{{±|0.01}}<ref name = Tycho2000/>
}}
}}
{{Starbox character
{{Starbox character
| type = horizontal branch<ref name=Tautvaišienė2013/>
| type = horizontal branch<ref name=Tautvaišienė2013/>
| class = G9III<ref name=Houk1999/>
| class = K0 III<ref name=Houk1999/>
| u-b =
| u-b = +1.03<ref name = Cousins1971/>
| b-v = {{Val|1.099|0.001}}<ref name=Anderson2012/>
| b-v = +1.11<ref name = Cousins1971/>
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = {{Val|+14.98|0.14}}<ref name=GaiaDR2/>
| radial_v = 15.3{{±|0.7}}<ref name = Gontcharov2006/>
| prop_mo_ra = +44.622<ref name=GaiaDR2/>
| prop_mo_ra = +45.245
| prop_mo_dec = −53.462<ref name=GaiaDR2/>
| prop_mo_dec = −53.594
| parallax = 14.98
| parallax = 6.9277
| p_error = 0.14
| p_error = 0.0368
| parallax_footnote = <ref name=GaiaDR2/>
| parallax_footnote = <ref name = EDR3/>
| pm_footnote = <ref name = EDR3/>
| absmag_v = 0.62<ref name=Anderson2012/>
| absmag_v = 0.62<ref name=Anderson2012/>
}}
}}
{{Starbox detail
{{Starbox detail
| source =
| source =
| mass = 1.4<ref name=Tautvaišienė2013/>
| mass = 1.95<ref name = Demarque2004/>
| radius = {{Val|12.75|0.59|0.42}}<ref name=GaiaDR2/>
| radius = 12.4<ref name = Stassun2019/>
| temperature = {{Val|4740|80|105|fmt=commas}}<ref name=GaiaDR2/>
| temperature = 4,807{{±|75}}<ref name = Stassun2019/>
| luminosity = {{Val|74.0|1.3}}<ref name=GaiaDR2/>
| luminosity = 72.4<ref name = Luck2015/>
| rotational_velocity =
| rotational_velocity = 2.8{{±|0.8}}<ref name = Fekel1998/>
| metal_fe = −0.03<ref name=Tautvaišienė2013/>
| metal_fe = −0.03<ref name=Tautvaišienė2013/>
| gravity = 1.8<ref name=Tautvaišienė2013/>
| gravity = 1.8<ref name=Tautvaišienė2013/>
| age_gyr = {{Val|9.00|0.12}}<ref name=Feuillet2016/>
| age_gyr = 1.62<ref name = Demarque2004/>
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = {{odlist | HR=2 | BD=−01°4525 | HIP=417 | HD=6 | SAO=128569 }}<ref name="SIMBAD"/>
| names = {{odlist | HR=2 | BD=−01°4525 | HIP=417 | HD=6 | SAO=128569 | Gould=62 G. Piscium | AG=−00°4 | GC=51 }}<ref name="SIMBAD"/>
}}
}}
{{Starbox reference
{{Starbox reference
Line 43: Line 44:
{{Starbox end}}
{{Starbox end}}


'''HD 6''' is a [[star]] in the [[celestial equator|equatorial]] [[constellation]] of [[Pisces (constellation)|Pisces]], and is located a couple of degrees southeast of the intersection between the [[ecliptic]] and the [[celestial equator]]. It is a yellow-hued star that is just barely visible to the naked eye with an [[apparent visual magnitude]] of 6.32.<ref name=Anderson2012/> The star is located at a distance of approximately 218&nbsp;[[light year]]s from the [[Sun]] based on [[stellar parallax|parallax]], and is drifting further away with a [[radial velocity]] of +15&nbsp;km/s.<ref name=GaiaDR2/> It has an [[absolute magnitude]] of 0.62.<ref name=Anderson2012/>
'''HD 6''' is a [[star]] in the [[celestial equator|equatorial]] [[constellation]] of [[Pisces (constellation)|Pisces]], and is located a couple of degrees southeast of the intersection between the [[ecliptic]] and the [[celestial equator]]. It is a yellow-hued star that is just barely visible to the naked eye with an [[apparent visual magnitude]] of 6.3.<ref name = Tycho2000/> The star is located at a distance of 471 [[light year]]s from the [[Sun]] based on [[stellar parallax|parallax]],<ref name = EDR3/> and is drifting further away with a [[radial velocity]] of {{val|15.3|ul=km/s}}.<ref name = Gontcharov2006/> It has an [[absolute magnitude]] of 0.62.<ref name=Anderson2012/>


An [[stellar evolution|evolved]] [[red giant]] with a [[stellar classification]] G9III,<ref name=Houk1999/> the star has moved off the main sequence by cooling and expanding. At the age of nine billion years,<ref name=Feuillet2016/> is now a [[red clump]] giant on the [[horizontal branch]] that is engaged in [[stellar core|core]] [[helium fusion]].<ref name=Tautvaišienė2013/> It has an estimated 1.4<ref name=Tautvaišienė2013/> times the [[mass of the Sun]] and has expanded to 13<ref name=GaiaDR2/> times the [[Sun's radius]]. The star is radiating 74 times the [[luminosity of the Sun]] from its [[photosphere]] at an [[effective temperature]] of 4,740&nbsp;K.<ref name=GaiaDR2/>
An [[stellar evolution|evolved]] [[red giant]] with a [[stellar classification]] K0 III,<ref name=Houk1999/> the star has moved off the main sequence by cooling and expanding. At the age of 1.6 [[billion years]],<ref name = Demarque2004/> is now a [[red clump]] giant on the [[horizontal branch]] that is engaged in [[stellar core|core]] [[helium fusion]].<ref name=Tautvaišienė2013/> It has nearly double the [[mass of the Sun]]<ref name = Demarque2004/> and has expanded to 12.4<ref name = Stassun2019/> times the [[Sun's radius]]. The star is radiating 72 times the [[luminosity of the Sun]]<ref name = Luck2015/> from its [[photosphere]] at an [[effective temperature]] of 4,807 [[Kelvin|K]].<ref name = Stassun2019/>


==References==
==References==
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<ref name=SIMBAD>{{cite simbad | title=HD 6 | access-date=2020-07-02 }}</ref>
<ref name=SIMBAD>{{cite simbad | title=HD 6 | access-date=2020-07-02 }}</ref>


<ref name=GaiaDR2>{{cite DR2|2545746482070713856}}</ref>
<ref name = EDR3>{{Cite Gaia EDR3|2545746482070713856}}</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 = Cousins1971>{{cite journal | last1 = Cousins | first1 = A. W. J. | title = Photometric standard stars | journal = Royal Observatory Annals | year = 1971 | volume = 7 | bibcode = 1971ROAn....7.....C}}</ref>

<ref name = Luck2015>{{cite journal | last1 = Luck | first1 = R. Earle | title = Abundances in the Local Region. I. G and K Giants | journal = The Astronomical Journal | date = 25 August 2015 | volume = 150 | issue = 3 | pages = 88 | doi = 10.1088/0004-6256/150/3/88 | issn = 0004-6256 | arxiv = 1507.01466 | bibcode = 2015AJ....150...88L | s2cid = 118505114 | eissn = 1538-3881}}</ref>


<ref name=Anderson2012>{{citation
<ref name=Anderson2012>{{citation
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| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref>
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</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=Tautvaišienė2013>{{citation
<ref name=Tautvaišienė2013>{{citation
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| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}</ref>
| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}</ref>


<ref name = Fekel1998>{{cite journal | last1 = Fekel | first1 = Francis C. | last2 = Watson | first2 = Lyndon C. | title = A Search for Lithium-rich Giants among Stars with Infrared Excesses | journal = The Astronomical Journal | date = November 1998 | volume = 116 | issue = 5 | pages = 2466–2474 | issn = 0004-6256 | doi = 10.1086/300614 | bibcode = 1998AJ....116.2466F | doi-access = free}}</ref>
<ref name=Feuillet2016>{{citation

| display-authors=1 | last1=Feuillet | first1=Diane K.
<ref name = Demarque2004>{{cite journal | last1 = Demarque | first1 = Pierre | last2 = Woo | first2 = Jong‐Hak | last3 = Kim | first3 = Yong‐Cheol | last4 = Yi | first4 = Sukyoung K. | title = <i>Y</i> <sup>2</sup> Isochrones with an Improved Core Overshoot Treatment | journal = The Astrophysical Journal Supplement Series | date = December 2004 | volume = 155 | issue = 2 | pages = 667–674 | issn = 0067-0049 | eissn = 1538-4365 | doi = 10.1086/424966 | bibcode = 2004ApJS..155..667D | doi-access = free}}</ref>
| last2=Bovy | first2=Jo | last3=Holtzman | first3=Jon

| last4=Girardi | first4=Léo | last5=MacDonald | first5=Nick
<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 <i>TESS</i> 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>
| last6=Majewski | first6=Steven R. | last7=Nidever | first7=David L.
| title=Determining Ages of APOGEE Giants with Known Distances
| journal=The Astrophysical Journal
| volume=817 | issue=1 | pages=40 | year=2016
| bibcode=2016ApJ...817...40F | arxiv=1511.04088
| doi=10.3847/0004-637X/817/1/40 | s2cid=118675933 | postscript=. }}</ref>


}}
}}

Revision as of 20:13, 12 August 2022

HD 6
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pisces
Right ascension 00h 05m 03.82339s[1]
Declination −00° 30′ 10.9306″[1]
Apparent magnitude (V) 6.30±0.01[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type K0 III[4]
U−B color index +1.03[5]
B−V color index +1.11[5]
Astrometry
Radial velocity (Rv)15.3±0.7[6] km/s
Proper motion (μ) RA: +45.245 mas/yr[1]
Dec.: −53.594 mas/yr[1]
Parallax (π)6.9277 ± 0.0368 mas[1]
Distance471 ± 3 ly
(144.3 ± 0.8 pc)
Absolute magnitude (MV)0.62[7]
Details
Mass1.95[8] M☉
Radius12.4[9] R☉
Luminosity72.4[10] L☉
Surface gravity (log g)1.8[3] cgs
Temperature4,807±75[9] K
Metallicity [Fe/H]−0.03[3] dex
Rotational velocity (v sin i)2.8±0.8[11] km/s
Age1.62[8] Gyr
Other designations
62 G. Piscium, AG−00°4, BD−01°4525, GC 51, HD 6, HIP 417, HR 2, SAO 128569[12]
Database references
SIMBADdata

HD 6 is a star in the equatorial constellation of Pisces, and is located a couple of degrees southeast of the intersection between the ecliptic and the celestial equator. It is a yellow-hued star that is just barely visible to the naked eye with an apparent visual magnitude of 6.3.[2] The star is located at a distance of 471 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of 15.3 km/s.[6] It has an absolute magnitude of 0.62.[7]

An evolved red giant with a stellar classification K0 III,[4] the star has moved off the main sequence by cooling and expanding. At the age of 1.6 billion years,[8] is now a red clump giant on the horizontal branch that is engaged in core helium fusion.[3] It has nearly double the mass of the Sun[8] and has expanded to 12.4[9] times the Sun's radius. The star is radiating 72 times the luminosity of the Sun[10] from its photosphere at an effective temperature of 4,807 K.[9]

References

  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 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 c d Tautvaišienė, G.; et al. (March 2013), "Red clump stars of the Milky Way - laboratories of extra-mixing", Monthly Notices of the Royal Astronomical Society, 430 (1): 621–627, arXiv:1304.4393, Bibcode:2013MNRAS.430..621T, doi:10.1093/mnras/sts663, S2CID 119211439.
  4. ^ a b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  5. ^ a b Cousins, A. W. J. (1971). "Photometric standard stars". Royal Observatory Annals. 7. Bibcode:1971ROAn....7.....C.
  6. ^ 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  7. ^ a b 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.
  8. ^ a b c d Demarque, Pierre; Woo, Jong‐Hak; Kim, Yong‐Cheol; Yi, Sukyoung K. (December 2004). "Y 2 Isochrones with an Improved Core Overshoot Treatment". The Astrophysical Journal Supplement Series. 155 (2): 667–674. Bibcode:2004ApJS..155..667D. doi:10.1086/424966. eISSN 1538-4365. ISSN 0067-0049.
  9. ^ a b c d 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.
  10. ^ a b Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv:1507.01466. Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88. eISSN 1538-3881. ISSN 0004-6256. S2CID 118505114.
  11. ^ Fekel, Francis C.; Watson, Lyndon C. (November 1998). "A Search for Lithium-rich Giants among Stars with Infrared Excesses". The Astronomical Journal. 116 (5): 2466–2474. Bibcode:1998AJ....116.2466F. doi:10.1086/300614. ISSN 0004-6256.
  12. ^ "HD 6". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-07-02.

External links


Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_6&oldid=1104119260"