ST Cephei

ST Cephei
ST Cephei, as seen during the Digitized Sky Survey
Object typeVariable star
Other designationsST Ceph, HD 239978, SAO 34529, BD+56 2793
Observation data
(Epoch J2000)
ConstellationCepheus
22h 30m 10.73s
Declination+57º 00’ 03,1’’
Distance~2,715 ly
In visual light (V)
+7,84
Temperature3,600 K
[edit on Wikidata]

ST Cephei (ST Cep)[1] is a large variable star located in the constellation Cepheus. It has a mean apparent magnitude of +7.84, and a solar radius of 1,218.

Distance

ST Cephei is very far from the solar system, and its parallax was not measured by the Hipparcos satellite. Its membership in the Cepheus OB2-B stellar association allows its distance to be estimated at 830 parsecs, or 2,715 light years.

Characteristics

A visual band light curve for ST Cephei, plotted from ASAS-SN data[2]

ST Cephei is a red supergiant of spectral type M3I—previously cataloged as M2I—with an effective temperature of 3,600 Kelvin. It is a large supergiant, with a diameter around 290 times larger than the diameter of the Sun;[1] another study, however, reduces this figure to 175 solar radii.[3] Considering an intermediate radius between both values, if it were in the place of the Sun, its surface would extend to the Earth's orbit. Despite this, its size is far from the two known hypergiants in this constellation, Me Cephei and VV Cephei.[1][3][4]

The bolometric luminosity of ST Cephei is 8,400 times greater than that of the Sun. It has a mass 9 times greater than the Sun, at the limit from which stars end their lives by exploding as supernovae. Like other analogous supergiants, it loses mass; Its loss of stellar mass—in the form of dust, since the atomic and molecular gas could not be evaluated—is quantified at 2.5 × 10-9 solar masses per year.[3]

In 1910 it was announced that Evelyn Leland had discovered that the star, then called BD +56°2793, is a variable star.[5] That same year it was given its variable star designation, ST Cephei.[6] Listed as an LC irregular variable star, the brightness of ST Cephei varies by about two magnitudes, with no period recognized.[1]

See also

References

  1. ^ a b c d ST Cephei (General Catalogue of Variable Stars)
  2. ^ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 16 December 2024.
  3. ^ a b c "Atmospheric dynamics and the mass loss process in red supergiant stars". Astronomy and Astrophysics. 469 (2). 2007. pp. 671-680.
  4. ^ Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal. 628 (2). pp. 973-985.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ Leland, E. F.; Pickering, Edward C. (January 1910). "20 New Variable Stars in Harvard Map, Nos. 2, 5, 32, 44, and 53". Harvard College Observatory Circular. 152: 1–3. Bibcode:1910HarCi.152....1L. Retrieved 17 December 2024.
  6. ^ Dunér, Nils Christofer; Hartwig, Ernst; Müller, G. (November 1910). "Benennung von neu entdeckten veränderlichen Sternen". Astronomische Nachrichten. 186 (17). Bibcode:1910AN....186..273D. doi:10.1002/asna.19101861702. Retrieved 17 December 2024.

Read other articles:

TUI fly Netherlands

Charter airline of the Netherlands This article is about the Dutch airline. For its sister companies, see TUI Group § TUI Multinational Airlines. TUI fly Netherlands IATA ICAO Callsign OR TFL ORANGE FoundedFebruary 2005; 19 years ago (2005-02)(as Arkefly)Commenced operations21 April 2005; 18 years ago (2005-04-21)Operating basesAmsterdamEindhovenRotterdam/The HagueFleet size11Destinations60[1]Parent companyTUI GroupHeadquartersHaarlemmerm...

 

 

Sources de l'histoire du costume

Les sources pour étudier l'histoire du costume sont de diverses sortes selon les époques, les lieux, et les informations recherchées. Selon leur nature elles présentent des avantages mais aussi des inconvénients, et leur confrontation permet de compléter les lacunes de chacune. Éléments du costume conservés Les éléments de costume conservés sont tributaires de leurs conditions d'utilisation et de conservation depuis l'époque de leur création. Ainsi, ils ont été utilisés jusqu...

 

 

Kolam Refleksi Memorial Lincoln

Artikel ini membutuhkan rujukan tambahan agar kualitasnya dapat dipastikan. Mohon bantu kami mengembangkan artikel ini dengan cara menambahkan rujukan ke sumber tepercaya. Pernyataan tak bersumber bisa saja dipertentangkan dan dihapus.Cari sumber: Kolam Refleksi Memorial Lincoln – berita · surat kabar · buku · cendekiawan · JSTOR (Oktober 2009) Lincoln Memorial Reflecting Pool bersama Washington Monument yang terpantul dan menjulang pada bulan Juli 200...

Первородный грех

Об экономическом термине см. Первородный грех (экономика). ХристианствоБиблия Ветхий Завет Новый Завет Евангелие Десять заповедей Нагорная проповедь Апокрифы Бог, Троица Бог Отец Иисус Христос Святой Дух История христианства Апостолы Хронология христианства Ран�...

 

 

1711 en France

Chronologie de la France ◄◄ 1707 1708 1709 1710 1711 1712 1713 1714 1715 ►► Chronologies Destruction du cimetière de l’abbaye de Port-Royal des Champs.Données clés 1708 1709 1710  1711  1712 1713 1714Décennies :1680 1690 1700  1710  1720 1730 1740Siècles :XVIe XVIIe  XVIIIe  XIXe XXeMillénaires :-Ier Ier  IIe  IIIe Chronologies thématiques Art Architecture, Arts plastiques (Dessin, Gravure, Peinture et Sculpture), Litté...

 

 

Morgan C. Hamilton

American politician (1809–1893) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Morgan C. Hamilton – news · newspapers · books · scholar · JSTOR (August 2023) (Learn how and when to remove this template message) Morgan Calvin HamiltonUnited States Senatorfrom TexasIn officeMarch 31, 1870 – March...

Alameda County Sheriff's Office

Law enforcement agency in California, US Alameda County Sheriff's OfficePatch of the Alameda County Sheriff's OfficeAbbreviationACSOAgency overviewFormed1853; 171 years ago (1853)Annual budget185.7 millionJurisdictional structureOperations jurisdictionAlameda County, California, U.S.Map of Alameda County Sheriff's Office's jurisdictionLegal jurisdiction Alameda County, CaliforniaOperational structureHeadquartersOakland, CaliforniaSworn members1000+Unsworn members600+Sheriff ...

 

 

Rhodesian Brushstroke

Camouflage pattern Rhodesian Brushstroke pattern Rhodesian Brushstroke pattern.TypeMilitary camouflage patternPlace of originRhodesiaService historyIn service1965-1980 (Rhodesian Service)Used by Rhodesia Zimbabwe South Africa ...And othersWarsRhodesian Bush WarMozambican Civil WarSecond Congo WarProduction historyDesignerDi CameronManufacturerDavid Whitehead Textiles (Original)Produced1965-Present The Rhodesian Brushstroke is a brushstroke-type camouflage pattern used by t...

 

 

Villa d'Este (Johannesburg)

For other uses, see Villa d'Este (disambiguation). Villa d'EsteVilla d'Este in 2014General informationCountrySouth AfricaCompleted1923Design and constructionArchitect(s)Gordon LeithDavid Morrison Villa d'Este (Johannesburg) is a National Heritage site in Johannesburg, Gauteng, recognized by the South African Heritage Resource Agency, and on the List of heritage sites in Gauteng. It is located at 82 Jan Smuts Avenue in Saxonwold. History The house was designed by architect Gordon Leith in 1923...

拉尔·巴哈杜尔·夏斯特里

拉尔·巴哈杜尔·夏斯特里第二任印度总理任期1964年6月9日—1966年1月11日总统薩瓦帕利·拉達克里希南前任古爾扎里拉爾·南達继任古爾扎里拉爾·南達印度外交部長任期1964年6月9日—1964年7月18日总理自己前任古爾扎里拉爾·南達继任斯瓦倫·辛格（英语：Swaran Singh）印度內政部長任期1961年4月4日—1963年8月29日总理賈瓦哈拉爾·尼赫魯前任戈文德·巴拉布·潘特（英语：Govind Balla...

 

 

Artah

Medieval fortified town Southeast Turkey Artah (Arabic: أرتاح; modern-day Reyhanlı)[1][2] was a medieval town and castle located 25 miles east-northeast of Antioch, to the east of the Iron Bridge on the Roman road from Antioch to Aleppo. History After the loss of Syria to the Arabs during the 7th century, the Byzantine Empire reconquered Artah in 966 as a step to reconquer Antioch a few years later.[3] Artah's importance came from its strategic position as it was...

 

 

來自深淵 (漫畫)

此條目疑似由大量爱好者内容组成。 (2023年8月1日)維基百科不是不經篩選的資訊收集處。請幫助改進這個條目，使用中立的語氣（而不是愛好者或媒體報道的語氣），移除瑣碎的軼事與未經證實的評論、不合適的列表和链接收集等。如條目內有愛好者可能感興趣而不符維基百科收錄標準的內容，可考慮將該等內容移至其他專門描寫來自深淵 (漫畫)的百科或網站，或在不存在�...

Rick and Morty: Virtual Rick-ality

2017 video game 2017 video gameRick and Morty: Virtual Rick-alityDeveloper(s)Owlchemy LabsPublisher(s)Adult Swim GamesEngineUnityPlatform(s)HTC Vive, PlayStation VR, Oculus RiftReleaseMicrosoft WindowsApril 20, 2017PlayStation 4April 10, 2018Genre(s)Simulation gameMode(s)Single-player Rick and Morty: Virtual Rick-ality is a virtual reality game compatible with HTC Vive, PlayStation VR and Oculus Rift developed by Owlchemy Labs and published by Adult Swim Games for Microsoft Windows on April 2...

 

 

ميكروب

هذه المقالة بحاجة لمراجعة خبير مختص في مجالها. يرجى من المختصين في مجالها مراجعتها وتطويرها. صورة مجهرية لبكتريا الإشريكية القولونية (E. coli) ملتقطة بواسطة مجهر إلكتروني ماسح الأحياء الدقيقة[1][2] أو المِيْكروبات[1][2][3] (بالإنجليزية: Microorganism)‏ أو (بالإنجليز...

 

 

Romantic medicine

Medical aspect of Romanticism Scene from Goethe's Faust Romantic medicine is part of the broader movement known as Romanticism, most predominant in the period 1800–1840, and involved both the cultural (humanities) and natural sciences, not to mention efforts to better understand man within a spiritual context ('spiritual science').[1] Romanticism in medicine was an integral part of Romanticism in science. Romantic writers were far better read in medicine than we tend to remember: By...

Sino-Tibetan languages

Language family native to Asia Sino-TibetanTrans-HimalayanGeographicdistributionCentral Asia, East Asia, South Asia and Southeast AsiaLinguistic classificationOne of the world's primary language familiesProto-languageProto-Sino-TibetanSubdivisionsSome 40 well-established subgroups, of which those with the most speakers are: Sinitic (Chinese) Lolo-Burmese Tibetic Karenic Bodo–Garo Kuki-Chin Meitei Tamangic Bai Jingpho–Luish ISO 639-2 / 5sitLinguasphere79- (phylozone)Glottologsino1245Groupi...

 

 

Megala Kalyvia

Municipal unit in GreeceMegala Kalyvia Μεγάλα ΚαλύβιαMunicipal unitMegala KalyviaLocation within the regional unit Coordinates: 39°30′N 21°47′E / 39.500°N 21.783°E / 39.500; 21.783CountryGreeceAdministrative regionThessalyRegional unitTrikalaMunicipalityTrikalaArea • Municipal unit45.3 km2 (17.5 sq mi)Population (2021)[1] • Municipal unit2,345 • Municipal unit density52/km2 (130/sq...

 

 

Telescopic sight

Optical sighting device for firearms This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Telescopic sight – news · newspapers · books · scholar · JSTOR (April 2018) (Learn how and when to remove this message) View through a 4× telescopic sight Leupold and Stevens Mark 6 scope with variable magnification X3-X18,...

Trevico

Trevicocomune Trevico – VedutaTrevico, il tetto d'Irpinia, osservato dal Tricolle di Ariano Irpino LocalizzazioneStato Italia Regione Campania Provincia Avellino AmministrazioneSindacoNicolino Rossi (Un'altra storia - Trevico in movimento) dal 26-5-2014 TerritorioCoordinate41°03′N 15°14′E41°03′N, 15°14′E (Trevico) Altitudine1 094 m s.l.m. Superficie11 km² Abitanti855[1] (31-3-2022) Densità77,73 ab./km² FrazioniLungarella,...

 

 

الدوري الفنلندي الممتاز 2002

هذه المقالة تحتاج للمزيد من الوصلات للمقالات الأخرى للمساعدة في ترابط مقالات الموسوعة. فضلًا ساعد في تحسين هذه المقالة بإضافة وصلات إلى المقالات المتعلقة بها الموجودة في النص الحالي. (أغسطس 2019) الدوري الفنلندي الممتاز 2002 تفاصيل الموسم الدوري الفنلندي الممتاز  النسخة 93&#...