{{위키데이터 속성 추적}}
{{항성 정보 시작|이름=HD 170069|로마자 이름=망원경자리 15}}
{{항성 정보 관측자료|역기점=[[J2000.0]] ([[국제천문기준좌표계|ICRS]])|별자리=[[망원경자리]]|적경={{RA|18|29|55.9414}}<ref name =  EDR3/>|적위={{DEC|-47|13|13.9500}}<ref name =  EDR3/>|겉보기등급=5.68{{±|0.01}}<ref name = Tycho2000/>}}
{{항성 정보 특성|종류=|분류=K2 III<ref name = Houk1978/>|u-b=|b-v=+1.26<ref name = Corben1971/>}}
{{항성 정보 위치천문|시선속도=−18{{±|4.3}}<ref name = Gontcharov2006/>|연주시차=5.5748|시차오차=0.1894|연주시차각주=<ref name =  EDR3/>|적경고유운동=+28.685|적위고유운동=−12.434|고유운동각주=<ref name =  EDR3/>|절대등급=−0.78<ref name = Anderson2012/>}}
{{항성 정보 상세|질량=4.08<ref name = Kervella2021/>|반지름=23.69<ref name = Stassun2019/>|광도=217<ref name =  GaiaDR2/>|중력=1.46<ref name = McDonald2017/>|기온=4490{{±|125}}<ref name = Stassun2019/>|철함유비=|자전속도=<1<ref name = DeMed2014/>|gyr나이=}}
{{항성 정보 분류|이름=15 G. Telescopii, CD−47°12319, CPD−47°8894, GC 25216, HD 170069, HIP 90662, HR 6922, SAO 229064<ref name = SIMBAD/><ref name = Gould1879/>}}
{{항성 정보 자료}}
{{End}}
'''HD 170069'''(HR 6922)는 남반구 [[별자리]]인 [[망원경자리]]에 있는 [[항성]]이다. [[겉보기등급|겉보기 등급]]은 5.68로 [[육안]]으로 희미하게 관측할 수 있다. 이 항성은 지구로부터 약 590 [[광년]]에 위치해 있다. HD 170069는 천문학자 벤자민 아프타롭 굴드가 이 별의 바이어 명칭을 제거하기 전까지 망원경자리 타우로 알려졌었다.<ref name = Wagman2003></ref>

HD 170069는 분광형 K2 III를 띄며, 이는 이 항성이 [[적색거성]]임을 나타낸다. 이 항성은 태양 질량의 약 4.08배이지만 둘레는 태양 반지름의 23.69배로 팽창했다.  이 항성은 [[유효온도]] {{Val|4490}}K이므로 오렌지색 빛을 방출하며, 항성이 나이를 먹음에 따라 [[항성 자전|항성 자전 속도]]는 1 km/s 미만으로 다른 항성들의 비해 매우 느린편에 속한다.<ref name = Eggleton2008></ref>

== 각주 ==
{{각주||refs=<ref name =  EDR3>6708177894848059520</ref>

<ref name = Tycho2000>{{저널 인용 |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>{{저널 인용 | last=Houk | first=Nancy | title=Michigan catalogue of two-dimensional spectral types for the HD stars | journal=Ann Arbor: Dept. Of Astronomy | bibcode=1978mcts.book.....H | year=1978}}</ref>

<ref name = Corben1971>{{저널 인용 |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=April 1971 |volume=30 |issue=4 |pages=37 |issn=0024-8266 |bibcode=1971MNSSA..30...37C}}</ref>

<ref name = Anderson2012>{{저널 인용 |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=119257644 }}</ref>

<ref name = Gontcharov2006>{{저널 인용 |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 |doi=10.1134/S1063773706110065 |issn=1063-7737 |bibcode=2006AstL...32..759G |arxiv=1606.08053|s2cid=119231169 }}</ref>

<ref name = Stassun2019>{{저널 인용 |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 = Kervella2021>{{저널 인용 | 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>{{저널 인용 | 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>

<ref name = DeMed2014>{{저널 인용 |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 & Astrophysics |date=January 2014 |volume=561 |pages=A126 |doi=10.1051/0004-6361/201220762 |issn=0004-6361 |bibcode=2014A&A...561A.126D |arxiv=1312.3474|doi-access=free}}</ref>

<ref name =  GaiaDR2>{{Cite DR2|6708177894848059520 }}</ref>

<ref name = Wagman2003>{{서적 인용| author = Morton Wagman | date = 2003 | title = Lost Stars: Lost, Missing, and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas-Louis de Lacaille, John Flamsteed, and Sundry Others | edition = 2 | publisher = McDonald & Woodward Publishing Company | pages = | isbn = 978-0-939923-78-6 | oclc = 1131243914 | url = https://books.google.com/books?id=TYLvAAAAMAAJ}}</ref>

<ref name = Eggleton2008>{{저널 인용 | 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 = Gould1879>{{저널 인용 | last=Gould | first=Benjamin Apthorp | title=Uranometria Argentina: brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral: con atlas | journal=Resultados del Observatorio Nacional Argentino | volume=1 | bibcode=1879RNAO....1.....G | year=1878 | page=}}</ref>

<ref name = SIMBAD>{{Cite simbad|title = HR 6922|access-date = June 24, 2022}}</ref>}}

{{망원경자리}}

[[분류:HR 천체]]
[[분류:히파르코스 천체]]
[[분류:헨리 드레이퍼 목록 천체]]
[[분류:망원경자리]]
[[분류:K형 거성]]