kappa Boötis

{{Starbox begin

| name=κ Boötis

}}

{{Starbox image

| image=

{{Location mark

|image=Boötes IAU.svg|alt=|float=center|width=300

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=κ Boo

|x=552|y=190

}}

|caption=Location of κ Boötis (circled)

}}

{{Starbox observe 2s

| constell=Boötes

| component1 = κ¹ Boötis

| epoch=J2000

| ra1={{RA|14|13|27.824}}

| dec1={{DEC|+51|47|16.62}}

| appmag_v1=+6.69

| component2 = κ² Boötis

| ra2={{RA|14|13|29.009}}

| dec2={{DEC|+51|47|23.88}}

| appmag_v2=+4.50 to +4.58

}}

{{Starbox character

| component1 = κ¹ Boötis

| class = F2V

| r-i =

| v-r =

| b-v =

| u-b =

| variable =

| component2 = κ² Boötis

| class2 = A8IV

| r-i2 = 0.12

| v-r2 =

| b-v2 = 0.2

| u-b2 = 0.14

| variable2 = Delta Scuti variable

}}

{{Starbox astrometry

| component1 = κ¹ Boötis

| radial_v=−22.09

| prop_mo_ra=44.094

| prop_mo_dec=−39.325

| parallax=20.3067

| p_error=0.2221

| parallax_footnote =

| absmag_v=+3.34

| component2 = κ² Boötis

| radial_v2=−15.60

| prop_mo_ra2=44.094

| prop_mo_dec2=−39.325

| parallax2=21.1980

| p_error2=0.4118

| parallax_footnote2 =

| absmag_v2=

}}

{{Starbox detail

| component1 = κ¹ Boötis

| mass=1.40

| radius=1.43

| luminosity=3.801

| temperature=6,699

| metal_fe=−0.09

| gravity=4.32

| rotational_velocity=38

| age_myr=900

| component2 = κ² Boötis

| mass2=2.12

| radius2=2.78

| luminosity2=28

| temperature2=7,760

| metal2_fe=−0.29

| gravity2=3.66

| rotational_velocity2=128

| age=

}}

{{Starbox catalog

| names=Asellus Tertius, κ Boo, 17 Boötis, BD+52 1782, HR 5328

| component1 = κ¹ Boötis

| names1=HD 124674, HIP 69481, SAO 29045

| component2 = κ² Boötis

| names2=HD 124675, HIP 69483, SAO 29046

}}

{{Starbox reference

| Simbad=17+Boo

| Simbad2=HD+124674|sn2=κ¹

| Simbad3=HD+124675|sn3=κ²

}}

Kappa Boötis (κ Boo, κ Boötis) is a double star in the constellation Boötes. It has the traditional name Asellus Tertius {{IPAc-en|ə|ˈ|s|ɛ|l|ə|s|_|ˈ|t|ɜːr|ʃ|i|ə|s}} (Latin for "third donkey colt") and the Flamsteed designation 17 Boötis. The components are separated by an angular distance of 13.5 arcsec, viewable in a small telescope. Kappa Boötis is approximately 155 light years from Earth.

Nomenclature

κ² Boötis, the brighter star of the pair, is also designated HD 124675, while κ¹ Boötis is HD 124674. The two stars share the Bright Star Catalogue designation HR 5328, but they have separate entries in the Hipparcos catalogue: HIP 69483 and HIP 69481 respectively.

Properties

File:Kappa2BooLightCurve.png light curve for Kappa² Boötis, adapted from Frandsen et al. (1995)]]

κ¹ Boötis is a spectroscopic binary star system. The visible primary is an F2 main sequence star, while the secondary is half the mass and much fainter.

κ² Boötis is classified as a Delta Scuti type variable star with a period of 1.08 hours Its brightness varies from magnitude +4.50 to +4.58. It is a slightly evolved A8 subgiant.

A 17th-magnitude star nearly two arc-minutes away has been identified as a member of the multiple system with an estimated orbital period of 177,000 years. It is itself a close binary with two similar low-mass stars in a 234-year orbit.

Etymology

This star, along with the other Aselli (θ Boo and ι Boo) and λ Boo, were Aulād al Dhiʼbah (أولاد الضّباع - awlād al-ḍibā), "the Whelps of the Hyenas".

In Chinese, {{lang|zh|天槍}} ({{lang|zh-Latn|Tiān Qiāng}}), meaning Celestial Spear, refers to an asterism consisting of κ (actually κ²) Boötis, ι Boötis and θ Boötis. Consequently, the Chinese name for κ Boötis itself is {{lang|zh|天槍一}} ({{lang|zh-Latn|Tiān Qiāng yī}}, {{langx|en|the First Star of Celestial Spear}}.)

References

{{reflist|refs=

{{in lang|zh}} [http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ama_b.htm 香港太空館 - 研究資源 - 亮星中英對照表] {{webarchive|url=https://web.archive.org/web/20100811014924/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_ama_b.htm |date=2010-08-11 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.

{{in lang|zh}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.

{{Cite journal|last=Tokovinin|first=Andrei|date=2018-03-01|title=The Updated Multiple Star Catalog|journal=The Astrophysical Journal Supplement Series|volume=235|issue=1|pages=6|doi=10.3847/1538-4365/aaa1a5|issn=0067-0049|arxiv=1712.04750|bibcode=2018ApJS..235....6T|s2cid=119047709 |doi-access=free }}

{{cite book

| last=Allen

| first=R. H.

| year=1963

| author-link=Richard Hinckley Allen

| title=Star Names: Their Lore and Meaning

| url=https://archive.org/details/starnamestheirlo00alle/page/105

| access-date=2010-12-12

| edition=Reprint

| publisher=Dover Publications Inc

| location=New York

| isbn=978-0-486-21079-7

| page=[https://archive.org/details/starnamestheirlo00alle/page/105 105]

| url-access=registration

}}

{{cite web

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|first=Jim|last=Kaler

|author-link=Jim Kaler

|url=http://stars.astro.illinois.edu/sow/asellust.html

|access-date=2017-09-06}}

[https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Bootes*.html Star Name - R.H.Allen p.105]

{{cite journal |last1=Frandsen |first1=S. |last2=Jones |first2=A. |last3=Kjeldsen |first3=H. |last4=Viskum |first4=M. |last5=Hjorth |first5=J. |last6=Andersen |first6=N. H. |last7=Thomsen |first7=B. |title=CCD photometry of the δ-Scuti star κ2 Bootis |journal=Astronomy and Astrophysics |date=September 1995 |volume=301 |page=123 |bibcode=1995A&A...301..123F |url=https://ui.adsabs.harvard.edu/abs/1995A&A...301..123F |access-date=3 September 2022}}

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{{cite journal|bibcode=2016ApJ...826..171G|title=The Correlation between Metallicity and Debris Disk Mass|journal=The Astrophysical Journal|volume=826|issue=2|pages=171|last1=Gáspár|first1=András|last2=Rieke|first2=George H.|last3=Ballering|first3=Nicholas|year=2016|doi=10.3847/0004-637x/826/2/171|arxiv=1604.07403|s2cid=119241004 |doi-access=free }}

{{cite journal | bibcode=2012A&A...537A.120Z | title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities | journal=Astronomy and Astrophysics | volume=537 | pages=A120 | last1=Zorec | first1=J. | last2=Royer | first2=F. | last3=Asplund | first3=Martin | last4=Cassisi | first4=Santi | last5=Ramirez | first5=Ivan | last6=Melendez | first6=Jorge | last7=Bensby | first7=Thomas | last8=Feltzing | first8=Sofia | year=2012 | arxiv=1201.2052 | doi=10.1051/0004-6361/201117691 | s2cid=55586789 }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205329 HR 5329]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205328 HR 5328]
[http://vizier.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14135%2b5147B CCDM J14135+5147]
[http://aladin.u-strasbg.fr/AladinPreview?-c=14+13+29.0078%2B51+47+23.874&ident=V*+kap+Boo&submit=Aladin+previewer Image Kappa Boötis]

Category:Boötes

Category:Binary stars

Category:Delta Scuti variables

Category:Double stars

Category:A-type subgiants

Category:F-type main-sequence stars