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{{short description|Double star in the constellation of Aquarius}}
{{Starbox begin
{{Starbox begin
| name = 41 Aquarii
| name = 41 Aquarii
Line 16: Line 17:
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| component1 = 41 Aqr A
⚫
| radial_v = –23.7<ref name=gcsrv/>
| prop_mo_ra = +24.30<ref name=aaa474_2_653/>
| radial_v = {{Val|−24.94|0.13}}<ref name=GaiaDR2A/>
| prop_mo_dec = +56.07<ref name=aaa474_2_653/>
| prop_mo_ra = +24.827<ref name=GaiaDR2A/>
⚫
| prop_mo_dec = +54.923<ref name=GaiaDR2A/>
⚫
| parallax = 13.97
| p_error = 0.73
| parallax = 13.7811
| p_error = 0.1850
| parallax_footnote = <ref name=aaa474_2_653/>
| parallax_footnote = <ref name=GaiaDR2A/>
| absmag_v =
| absmag_v =
| component2 =
| prop_mo_ra2 = +27.266<ref name=GaiaDR2B/>
| prop_mo_dec2= +57.272<ref name=GaiaDR2B/>
⚫
| parallax2 = 13.5404
| p_error2 = 0.0719
| parallax_footnote2 = <ref name=GaiaDR2B/>
}}
}}
{{Starbox detail
{{Starbox detail
| component1 = 41 Aqr A
| mass =
| mass =
| radius =
| radius = {{Val|7.88|0.09|0.13}}<ref name=GaiaDR2A/>
| luminosity =
| luminosity = {{Val|33.93|0.53}}<ref name=GaiaDR2A/>
| temperature = 4,750<ref name=ajss74_1075/>
| temperature = 4,750<ref name=ajss74_1075/>
| metal_fe = –0.13<ref name=ajss74_1075/>
| metal_fe = –0.13<ref name=ajss74_1075/>
Line 33: Line 42:
| rotational_velocity =
| rotational_velocity =
| age_gyr =
| age_gyr =
| component2 = 41 Aqr B
| radius2 = {{Val|1.76|0.29|0.06}}<ref name=GaiaDR2B/>
| luminosity2 = {{Val|6.319|0.043}}<ref name=GaiaDR2B/>
| temperature2= {{Val|6899|115|506|fmt=commas}}<ref name=GaiaDR2B/>
}}
}}
{{Starbox catalog
{{Starbox catalog
| names = 41 Aqr, [[Bonner Durchmusterung|BD]]–21 6180, [[Henry Draper Catalogue|HD]] 210960, [[Hipparcos catalogue|HIP]] 109786, [[Bright Star Catalogue|HR]] 8480, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 190986.<ref name=SIMBAD/>
| names = {{odlist | F=41 Aqr | BD=–21°6180 | HD=210960 | HIP=109786 | HR=8480 | SAO=190986 | WDS=J22143-2104 }}<ref name=SIMBAD/>
}}
{{Starbox reference
| Simbad = 41+Aqr
}}
}}
{{Starbox end}}
{{Starbox end}}

'''41 Aquarii''' is the [[Flamsteed designation]] for a [[double star]]<ref name=mnras389_2_869/> in the [[celestial equator|equatorial]] [[constellation]] of [[Aquarius (constellation)|Aquarius]]. Its [[apparent magnitude]] is 5.354<ref name=aaass47_221/> and is located at a distance of around {{Convert|230|ly|pc|abbr=off|lk=on}} from Earth. The brighter component is a [[red clump]]<ref name=apj539_2_732/> [[giant star]] with a [[stellar classification]] of K0&nbsp;III and a magnitude of 5.73. At an [[angular separation]] of 5.148&nbsp;[[arcsecond]]s, the fainter companion is an [[F-type main sequence star]] with a magnitude 7.16 and a classification of F8&nbsp;V.<ref name=mnras389_2_869/>
'''41 Aquarii''' is a [[double star]]<ref name=mnras389_2_869/> in the [[celestial equator|equatorial]] [[constellation]] of [[Aquarius (constellation)|Aquarius]]. ''41 Aquarii'' is its [[Flamsteed designation]]. It is visible to the naked eye as a dim, orange-hued point of light with a combined [[apparent visual magnitude]] of 5.354.<ref name=aaass47_221/> The pair are located at a distance of around {{Convert|239|ly|pc|abbr=off|lk=on}} from the Sun based on [[stellar parallax|parallax]], but are drifting closer with a [[radial velocity]] of –25&nbsp;km/s.<ref name=GaiaDR2A/>

The brighter component of the pair is a [[red clump]]<ref name=apj539_2_732/> [[giant star]] with a [[stellar classification]] of K0&nbsp;III<ref name=mnras389_2_869/> and a magnitude of 5.73. This is an aging star that has exhausted the supply of hydrogen at its [[stellar core|core]] and is now generating energy through core [[helium fusion]]. It has eight<ref name=GaiaDR2A/> times the girth of the Sun and is radiating 34<ref name=GaiaDR2A/> times the [[luminosity of the Sun]] at an [[effective temperature]] of 4,750&nbsp;K.<ref name=ajss74_1075/>

At an [[angular separation]] of 5.148&nbsp;[[arcsecond]]s, the fainter companion is an [[F-type main sequence star]] with a magnitude 7.16 and a classification of F8&nbsp;V.<ref name=mnras389_2_869/> It has 1.8<ref name=GaiaDR2B/> times the Sun's radius and is radiating six<ref name=GaiaDR2B/> times the Sun's luminosity from its photosphere at 6,899&nbsp;K.<ref name=GaiaDR2B/>


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


<ref name=GaiaDR2A>{{cite DR2|6819552169260987520}}</ref>
<ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen | year=2007 | month=November | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | postscript=. |arxiv = 0708.1752 }}</ref>


<ref name=GaiaDR2B>{{cite DR2|6819552164966109696}}</ref>
<ref name=mnras389_2_869>{{citation | 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 | volume=389 | issue=2 | pages=869–879 | month=September | year=2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 }}</ref>


<ref name=gcsrv>{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953QB901.W495..... | postscript=. }}</ref>
<ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}</ref>


<ref name=ajss74_1075>{{citation | last1=McWilliam | first1=Andrew | title=High-resolution spectroscopic survey of 671 GK giants | journal=Astrophysical Journal Supplement Series | year=1990 | month=December | volume=74 | pages=1075–1128 | format=PDF | origin=STI | bibcode=1990ApJS...74.1075M | doi=10.1086/191527 | postscript=. }}</ref>
<ref name=mnras389_2_869>{{citation | 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]] | volume=389 | issue=2 | pages=869–879 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. |date=September 2008| doi-access=free | s2cid=14878976 }}</ref>


<ref name=SIMBAD>{{citation | title=41 Aqr -- Star in double system | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=41+Aquarii | accessdate=2012-02-23 | postscript=. }}</ref>
<ref name=ajss74_1075>{{citation | last1=McWilliam | first1=Andrew | title=High-resolution spectroscopic survey of 671 GK giants | journal=Astrophysical Journal Supplement Series |date=December 1990 | volume=74 | pages=1075–1128 | bibcode=1990ApJS...74.1075M | doi=10.1086/191527 | postscript=. | doi-access= }}</ref>


<ref name=SIMBAD>{{citation | title=41 Aqr -- Star in double system | work=SIMBAD Astronomical Database | publisher=[[Centre de Données astronomiques de Strasbourg]] | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=41+Aquarii | access-date=2012-02-23 | postscript=. }}</ref>
⚫
<ref name=aaass47_221>{{citation | display-authors=1 | last1=Rakos | first1=K. D. | last1=Albrecht | first1=R. | last1=Jenkner | first1=H. | last1=Kreidl | first1=T. | last1=Michalke | first1=R. | last1=Oberlerchner | first1=D. | last1=Santos | first1=E. | last1=Schermann | first1=A. | last1=Schnell | first1=A. | last1=Weiss | first1=W. | title=Photometric and astrometric observations of close visual binaries | journal=Astronomy and Astrophysics Supplement Series | volume=47 | year=1982 | month=February | pages=221–235 | bibcode=1982A&AS...47..221R | postscript=. }}</ref>


⚫
<ref name=aaass47_221>{{citation | last1=Rakos | first1=K. D. | last2=Albrecht | first2=R. | last3=Jenkner | first3=H. | last4=Kreidl | first4=T. | last5=Michalke | first5=R. | last6=Oberlerchner | first6=D. | last7=Santos | first7=E. | last8=Schermann | first8=A. | last9=Schnell | first9=A. | last10=Weiss | first10=W. | display-authors=1 | title=Photometric and astrometric observations of close visual binaries | journal=Astronomy and Astrophysics Supplement Series | volume=47 |date=February 1982 | pages=221–235 | bibcode=1982A&AS...47..221R | postscript=. }}</ref>
⚫
<ref name=apj539_2_732>{{citation | last1=Alves | first1=David R. | title=K-Band Calibration of the Red Clump Luminosity | journal=The Astrophysical Journal | volume=539 | issue=2 | pages=732–741 | month=August | year=2000 | doi=10.1086/309278 | bibcode=2000ApJ...539..732A | postscript=. |arxiv = astro-ph/0003329 }}</ref>

⚫
<ref name=apj539_2_732>{{citation | last1=Alves | first1=David R. | title=K-Band Calibration of the Red Clump Luminosity | journal=The Astrophysical Journal | volume=539 | issue=2 | pages=732–741 | doi=10.1086/309278 | bibcode=2000ApJ...539..732A | arxiv=astro-ph/0003329 | postscript=. |date=August 2000| s2cid=16673121 }}</ref>


}}
}}


{{Stars of Aquarius}}
{{Stars of Aquarius}}
<!-- Properties -->

⚫
{{DEFAULTSORT:41 Aquarii}}
[[Category:Aquarius (constellation)]]
[[Category:K-type giants]]
[[Category:F-type main-sequence stars]]
[[Category:Horizontal-branch stars]]
[[Category:Double stars]]
[[Category:Double stars]]
<!-- Catalogues -->
⚫
[[Category:Flamsteed objects|Aquarii, 41]]
[[Category:HR objects|8480]]
[[Category:Aquarius (constellation)]]
[[Category:Durchmusterung objects|BD-21 6180]]

⚫
[[Category:Flamsteed objects|Aquarii, 041]]

[[Category:Henry Draper Catalogue objects|210960]]
{{binary-star-stub}}
[[Category:Hipparcos objects|109786]]

[[Category:Bright Star Catalogue objects|8480]]
⚫
[[ca:41 Aquarii]]
[[fa:۴۱ دلو]]
[[it:41 Aquarii]]
[[zh:天鷹座41]]

Latest revision as of 02:00, 9 December 2024

41 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 14m 18.03271s[1]
Declination –21° 04′ 28.4330″[1]
Apparent magnitude (V) 5.354[2]
Characteristics
Spectral type K0 III + F8 V[3]
U−B color index +0.465[2]
B−V color index +0.834[2]
Astrometry
41 Aqr A
Radial velocity (Rv)−24.94±0.13[4] km/s
Proper motion (μ) RA: +24.827[4] mas/yr
Dec.: +54.923[4] mas/yr
Parallax (π)13.7811 ± 0.1850 mas[4]
Distance237 ± 3 ly
(72.6 ± 1.0 pc)
Proper motion (μ) RA: +27.266[5] mas/yr
Dec.: +57.272[5] mas/yr
Parallax (π)13.5404 ± 0.0719 mas[5]
Distance241 ± 1 ly
(73.9 ± 0.4 pc)
Details
41 Aqr A
Radius7.88+0.09
−0.13[4] R☉
Luminosity33.93±0.53[4] L☉
Surface gravity (log g)2.85[6] cgs
Temperature4,750[6] K
Metallicity [Fe/H]–0.13[6] dex
41 Aqr B
Radius1.76+0.29
−0.06[5] R☉
Luminosity6.319±0.043[5] L☉
Temperature6,899+115
−506[5] K
Other designations
41 Aqr, BD–21°6180, HD 210960, HIP 109786, HR 8480, SAO 190986, WDS J22143-2104[7]
Database references
SIMBADdata

41 Aquarii is a double star[3] in the equatorial constellation of Aquarius. 41 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, orange-hued point of light with a combined apparent visual magnitude of 5.354.[2] The pair are located at a distance of around 239 light-years (73 parsecs) from the Sun based on parallax, but are drifting closer with a radial velocity of –25 km/s.[4]

The brighter component of the pair is a red clump[8] giant star with a stellar classification of K0 III[3] and a magnitude of 5.73. This is an aging star that has exhausted the supply of hydrogen at its core and is now generating energy through core helium fusion. It has eight[4] times the girth of the Sun and is radiating 34[4] times the luminosity of the Sun at an effective temperature of 4,750 K.[6]

At an angular separation of 5.148 arcseconds, the fainter companion is an F-type main sequence star with a magnitude 7.16 and a classification of F8 V.[3] It has 1.8[5] times the Sun's radius and is radiating six[5] times the Sun's luminosity from its photosphere at 6,899 K.[5]

References

[edit]
  1. ^ a b van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ a b c d Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series, 47: 221–235, Bibcode:1982A&AS...47..221R.
  3. ^ a b c d 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.
  4. ^ a b c d e f g h i 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.
  5. ^ a b c d e f g h i 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.
  6. ^ a b c d McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
  7. ^ "41 Aqr -- Star in double system", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-02-23.
  8. ^ Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.
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