NGC 2023

NGC 2023
星云
發射星雲
緊挨著馬頭星雲的NGC 2023
觀測資料: J2000 epoch
赤经05h 41m 37.9s[1]
赤纬−02° 15′ 52″[1]
距離1,300 ly（400 pc）[2] 光年
視尺度(V)10'×10'[3]
星座獵戶座[3]
名稱NGC 2023,[3] LBN 954, IRAS 05391-0217[1]
相關條目：星雲列表

NGC 2023是在赤道星座獵戶座中的一個發射和反射星雲。它是由出生於德國的天文學家威廉·赫歇爾在1785年1月6日發現的。這個反射星雲是天空中最大的星雲之一[4]， 大小為10 × 10 弧分[3]。它位於馬頭星雲東北方~15′，距離太陽 1,300 ly（400 pc）[2]。

這個恆星形成區的星雲是獵戶座B分子雲的一部分[2]，或複合體獵戶座分子雲團（Lynds 1630）的北段。就恆星密度而言，它是嵌入該複合體的四個星團中最貧瘠的，只有21個嵌入紅外源[5]。反射星雲被赫比格Ae/Be星HD 37903（英语：HD 37903）照亮，其光譜類型約為B2Ve[5]。 中心恆星周圍的區域正在近紅外範圍內輻射螢光分子氫發射[6][7]。已經從星雲的塵埃中探測到多環芳香烴的紅外發射[8]。

圖集

參考資料

维基共享资源上的相关多媒体资源：NGC 2023
  1. ^ 1.0 1.1 1.2 NGC 2023. SIMBAD. 斯特拉斯堡天文資料中心. [2020-08-28]. 
  2. ^ 2.0 2.1 2.2 López-García, M. A.; et al. A comprehensive study of NGC 2023 with XMM-Newton and Spitzer. Monthly Notices of the Royal Astronomical Society. February 2013, 429 (1): 775–791. Bibcode:2013MNRAS.429..775L. arXiv:1211.2935 可免费查阅. doi:10.1093/mnras/sts373. 
  3. ^ 3.0 3.1 3.2 3.3 Seligman, Courtney. NGC Objects: NGC 2000 - 2049. cseligman.com. [2020-08-28]. （原始内容存档于2018-10-16）. 
  4. ^ ESO's Very Large Telescope Snaps Beautiful Image of Reflection Nebula. Sci–News. May 14, 2019 [2020-08-28]. （原始内容存档于2020-09-23）. 
  5. ^ 5.0 5.1 Mookerjea, B.; et al. Young stars and protostellar cores near NGC 2023. Astronomy and Astrophysics. December 2009, 507 (3): 1485–1502. Bibcode:2009A&A...507.1485M. S2CID 10603379. arXiv:0909.2614 可免费查阅. doi:10.1051/0004-6361/200912550. 
  6. ^ Burton, Michael G.; et al. Near-IR Fluorescent Molecular Hydrogen Emission from NGC 2023. Publications of the Astronomical Society of Australia. 1998, 15 (2): 194–201. Bibcode:1998PASA...15..194B. doi:10.1071/AS98194 可免费查阅. 
  7. ^ Rouan, D.; et al. The power of adaptive optics: a close look at a molecular cloud in NGC 2023. Monthly Notices of the Royal Astronomical Society. January 1997, 284 (2): 395–400. Bibcode:1997MNRAS.284..395R. doi:10.1093/mnras/284.2.395 可免费查阅. 
  8. ^ Peeters, Els; et al. The PAH Emission Characteristics of the Reflection Nebula NGC 2023. The Astrophysical Journal. February 2017, 836 (2): 40. Bibcode:2017ApJ...836..198P. S2CID 119211134. arXiv:1701.06585 可免费查阅. doi:10.3847/1538-4357/836/2/198. 198. 

外部連結

Read other articles:

André Philip

Pour les articles homonymes, voir Philip et André Philip (homonymie). André Philip André Philip en 1965. Fonctions Député français 6 novembre 1945 – 3 juillet 1951(5 ans, 7 mois et 27 jours) Élection 21 octobre 1945 Réélection 2 juin 194610 novembre 1946 Circonscription 1re du Rhône Législature Ire ConstituanteIIe ConstituanteIre (Quatrième République) Groupe politique SOC 1er juin 1936 – 31 mai 1942(5 ans, 11 mois et 30 jours) Élection 3 mai 1...

 

 

Mick Kelleher

American baseball player and coach Baseball player Mick KelleherKelleher in 2013InfielderBorn: (1947-07-25) July 25, 1947 (age 76)Seattle, Washington, U.S.Batted: RightThrew: RightMLB debutSeptember 1, 1972, for the St. Louis CardinalsLast MLB appearanceOctober 3, 1982, for the California AngelsMLB statisticsBatting average.213Hits230Runs batted in65 TeamsAs player St. Louis Cardinals (1972–1973) Houston Astros (1974) St. Louis Cardinals (1975) Chicago Cub...

 

 

Pantelimon, Constanţa

Untuk kegunaan lain, lihat Pantelimon. PantelimonDesaNegara RumaniaProvinsiConstanţaStatusKomunePemerintahan • Wali kotaVasile Neicu (Partidul Social Democrat)Luas • Total134,83 km2 (5,206 sq mi)Populasi (2004) • Total1.943Zona waktuUTC+2 (EET) • Musim panas (DST)UTC+3 (EEST)Situs webhttp://www.comunapantelimon.ro Pantelimon adalah komune yang terletak di provinsi Constanţa, Rumania. Di komune ini terdapat lima desa: P...

Pterygoid hamulus

Hook-like process of the sphenoid bone of the skull Pterygoid hamulusSphenoid bone. Anterior and inferior surfaces. (Hamulus labeled at bottom left.)Sagittal section of skull. (Sphenoid is in yellow, and pterygoid hamulus labeled at bottom center.)DetailsPart ofsphenoid bone of skullSystemskeletalIdentifiersLatinhamulus pterygoideusTA98A02.1.05.051TA2637FMA54722Anatomical terms of bone[edit on Wikidata] The pterygoid hamulus is a hook-like process at the lower extremity of the medial pter...

 

 

Katharine O'Shea

English aristocrat (1846–1921) Katharine ParnellBornKatharine Wood(1846-01-30)30 January 1846Braintree, Essex, EnglandDied5 February 1921(1921-02-05) (aged 75)Spouses William O'Shea ​ ​(m. 1867; div. 1890)​ Charles Stewart Parnell ​ ​(m. 1891; died 1891)​Children5 Katharine Parnell (née Wood; 30 January 1846 – 5 February 1921), known before her second marriage as Katharine O'Shea, and...

 

 

StarFlyer

Kantor pusat StarFlyer StarFlyer Inc. (株式会社スターフライヤー, Kabushiki-gaisha Sutāfuraiyā?) adalah sebuah maskapai penerbangan Jepang yang berkantor pusat di wilayah Bandar Udara Kitakyushu di Kokuraminami-ku, Kitakyūshū, Prefektur Fukuoka.[1] Maskapai ini menyebutkan dirinya sebagai sebuah maskapai hibrida menyediakan layanan yang lebih tinggi dibandingkan maskapai penerbangan bertarif rendah namun memiliki biaya operasional yang lebih rendah dibandingkan maskapai...

Buddhism in Iceland

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (January 2015) (Learn how and when to remove this message) Membership in registered non-Christian religious organizations in Iceland. The dark blue line represents Buddhism Buddhism in Iceland is followed by 0.43% of the population of Iceland, according to the 2021 Census.[1...

 

 

عمرو حنفي

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (مارس 2021) عمرو حنفي Amr Hanafi الرئيس عبد الفتاح السيسي رئيس الوزراء مصطفى مدبولي معلومات شخصية اسم الولادة عمرو محمد حنفى محمود الميلاد 2 مارس 1963 (العمر 61 سنة)البحر الاحمر ا...

 

 

الدوري البحريني الممتاز 1977–78

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. (يناير 2018) الدوري البحريني الممتاز 1977–78معلومات عامةالرياضة كرة القدم البطولة الدوري الب...

A23 road

Major road in the United Kingdom This article is about a road in England. For other countries, see List of A23 roads. A23The A23 near Patcham, East Sussex.Route informationLength51.2 mi[1] (82.4 km)Major junctionsSouth end A259 in Brighton50°49′48″N 0°08′17″W / 50.830°N 0.138°W / 50.830; -0.138Major intersections A27 in Brighton A272 in Bolney M23 / A264 in Crawley M23 in Merstham A22 in Purley, London A232 near Croydon A214...

 

 

HMS Eclipse (H08)

HMS EclipseDescrizione generale TipoCacciatorpediniere ClasseClasse E Proprietà Royal Navy Ordine1º novembre 1932 CostruttoriWilliam Denny and Brothers CantiereDumbarton, Regno Unito Impostazione22 marzo 1933 Varo12 aprile 1934 Entrata in servizio29 novembre 1934 Destino finaleAffondata il 24 ottobre 1943 al largo di Calimno per l'urto con una mina Caratteristiche generaliDislocamentostandard: 1.428 t a pieno carico: 1.970 t Lunghezza100,3 m Larghezza10,13 m Pescaggio3,81 ...

 

 

Saratoga (New York)

Pour les articles homonymes, voir Saratoga. Cet article est une ébauche concernant une localité de l’État de New York. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. SaratogaGéographiePays  États-UnisÉtat New YorkComté comté de SaratogaSuperficie 111,11 km2Altitude 134 mCoordonnées 43° 03′ N, 73° 39′ ODémographiePopulation 5 808 hab. (2020)Densité 52,3 hab./k...

Gonzalo Fernández de Córdoba (1585–1635)

Spanish military leader DonGonzalo Fernández de CórdobaPrince of MarateaEngraving of Gonzalo Fernández de CórdobaGovernor of the Duchy of MilanIn office1625–1629MonarchPhilip IV of SpainPreceded byGómez Suárez de FigueroaSucceeded byAmbrosio Spinola Personal detailsBorn(1585-12-31)31 December 1585Cabra, Province of Córdoba, SpainDied16 February 1635(1635-02-16) (aged 49)Montalbán, SpainMilitary serviceAllegiance SpainBattles/wars War of the Montferrat Succession Eighty Years' W...

 

 

旧制大学

旧制大学（きゅうせいだいがく、旧字体：舊制大學）とは、日本において学校教育法（1947年4月1日施行）より前の学校制度における大学の全般を指す言葉である。 概要 旧制大学という用語は、第二次世界大戦後の1947年に施行された学校教育法によって新規に設立された大学（新制大学）と対比する意味で用いられる事が多い。一般的な修業年限は明治25年4月以降、医�...

 

 

Georgi Plekhanov

Russian philosopher (1856–1918) In this name that follows Eastern Slavic naming customs, the patronymic is Valentinovich and the family name is Plekhanov. Georgi PlekhanovГеоргий ПлехановBornGeorgi Valentinovich Plekhanov(1856-12-11)11 December 1856Gudalovka, Tambov Governorate, Russian EmpireDied30 May 1918(1918-05-30) (aged 61)Terijoki, FinlandEducationVoronezh Military AcademySt. Petersburg Metallurgical Institute (withdrew)SpouseRozaliia Bograd-PlekhanovaEra19th-...

NGC 2879

NGC 2879 الكوكبة الشجاع  رمز الفهرس NGC 2879 (الفهرس العام الجديد)  المكتشف هاينريش لويس دريست  تاريخ الاكتشاف 27 فبراير 1865  شاهد أيضًا: مجرة، قائمة المجرات تعديل مصدري - تعديل   NGC 2879 في الفهرس العام الجديد، هي مجرة، تقع في كوكبة الشجاع.[1] اكتشفت في 27 فبراير 1865 بواسطة...

 

 

Russian language in Ukraine

This article needs to be updated. Please help update this article to reflect recent events or newly available information. (January 2023) Members of a Russophone association supporting the 2006 decision of the Kharkiv City Council to make the Russian language official at local level. Party of Regions 2012 parliamentary election campaign poster in Crimea stating Russian: (upgrade it) from a regional language to the second official (state) language Russian is the most common first language in ...

 

 

Vela (satellite)

Pour les articles homonymes, voir Vela. Vela Vela-5A et 5B dans une salle blancheDonnées générales Organisation United States Air Force Programme Projet Vela & Integrated Operational Nuclear Detection System (IONDS). Domaine Satellite de reconnaissance Lancement 1963 à 1970 Lanceur Atlas/AgenaTitan IIIC Fin de mission 1984 Durée 15 ans Caractéristiques techniques Masse au lancement de 150 à 261 kg modifier Vela est une famille de satellites de reconnaissance développée par les �...

Dresden–Werdau railway

Railway line in Saxony, Germany Dresden Hbf–Werdau wyeOverviewLine number 6258; Saxon DW 6257; Saxon DWCh LocaleSaxony, GermanyTerminiDresden HbfWerdau wyeServiceRoute number510, 510.3TechnicalLine length136.304 km (84.695 mi)Number of tracks2Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gaugeMinimum radius213 m (699 ft)Electrification15 kV/16.7 Hz AC overhead catenaryOperating speed120 km/h (74.6 mph) (maximum) with tilting: 160 k...

 

 

Abdolfattah Soltani

Iranian human rights defender Abdolfattah Soltaniعبدالفتاح سلطانیBornNovember 2, 1953 (1953-11-02) (age 70)NationalityIranianOccupationlawyerOrganizationDefenders of Human Rights CenterKnown forHuman rights cases; 2005, 2009, and 2012 arrestsSpouseMasoumeh DehghanChildren4AwardsNuremberg International Human Rights Award (2009)International Bar Association Human Rights Award (2012) Abdolfattah Soltani (Persian: عبدالفتاح سلطانی; born 2 November 1953...