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langs: 21 августа [ru] / august 21 [en] / 21. august [de] / 21 août [fr] / 21 agosto [it] / 21 de agosto [es]

days: august 18 / august 19 / august 20 / august 21 / august 22 / august 23 / august 24

Asteroid / Asteroid


#1 3102 Krok

3102 Krok , provisional designation 1981 QA , is a rare-type asteroid and slow rotator , classified as a near-Earth object of the Amor group , that measures approximately 1.5 kilometers in diameter. 3102 Krok Discovery   [1] Discovered   by L. Brožek Discovery   site Kleť Obs. Discovery   date 21 Au

#2 2013 YP139

2013 YP 139 is a dark sub-kilometer asteroid on a highly eccentric orbit, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group , approximately 400 meters (1,300 feet) in diameter. [4] 2013 YP 139 Near-Earth asteroid 2013 YP 139 —the six red dots in the composite i

#3 (275809) 2001 QY297

(275809) 2001 QY 297 is a trans-Neptunian object from the classical Kuiper belt , located in the outermost region of the Solar System . The binary classical Kuiper belt object belongs to the cold population . [5] (275809) 2001 QY 297 Hubble Space Telescope image of 2001 QY 297 and its satellite, tak

#4 (612243) 2001 QR322

(612243) 2001 QR 322 , prov. designation : 2001 QR 322 , is a minor planet and the first Neptune trojan discovered on 21 August 2001, by American astronomer Marc Buie of the Deep Ecliptic Survey at Cerro Tololo Observatory in Chile. [1] [6] It orbits ahead of Neptune at its L 4 Lagrangian point and

#5 Makemake

Makemake [lower-alpha 6] ( minor-planet designation 136472 Makemake ) is a dwarf planet and – depending on how they are defined – the second-largest Kuiper belt object in the classical population , [lower-alpha 2] with a diameter approximately 60% that of Pluto . [24] [25] It has one known satellite

#6 2021 PH27

2021 PH 27 is a near-Earth asteroid of the Atira group . It was discovered by Scott Sheppard using the Dark Energy Survey 's DECam imager at NOIRLab 's Cerro Tololo Inter-American Observatory on 13 August 2021. 2021 PH 27 has the smallest semi-major axis and shortest orbital period among all known a

#7 (369623) 2011 DY5

(369623) 2011 DY 5 , provisional designation 2011 DY 5 , is a Tirela asteroid from the outer regions of the asteroid belt , approximately 3.2 kilometers (2.0 miles) in diameter. It was discovered on 30 August 2008, by French amateur astronomers Christophe Demeautis and Jean-Marie Lopez at the Pises

#8 983 Gunila

983 Gunila ( prov. designation : A922 OD or 1922 ME ), is a dark background asteroid from the outer regions of the asteroid belt , approximately 74 kilometers (46 miles) in diameter. It was discovered on 30 July 1922, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germ

#9 2016 AJ193

2016 AJ 193 , also known as 2010 KV 134 , is a near-Earth object and potentially hazardous asteroid of the Apollo group , approximately 1.4 kilometres (0.87   mi) in diameter. It was discovered on 17 May 2010 by the Wide-field Infrared Survey Explorer (WISE) satellite, but was lost until it was reob

#10 505 Cava

Cava ( minor planet designation : 505 Cava ) is a minor planet orbiting the Sun . 505 Cava A three-dimensional model of 505 Cava based on its light curve Discovery Discovered   by R. H. Frost Discovery   site Arequipa Discovery   date 21 August 1902 Designations MPC   designation (505) Cava Named af

#11 7449 Döllen

7449 Döllen , provisional designation 1949 QL , is a stony Florian asteroid from the inner regions of the asteroid belt , approximately 3.5 kilometers (2.2 miles) in diameter. It was discovered on 21 August 1949, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany.

#12 21088 Chelyabinsk

21088 Chelyabinsk , provisional designation 1992 BL 2 , is a stony asteroid and near-Earth object of the Amor group , approximately 4 kilometers in diameter. It was discovered on 30 January 1992, by Belgian astronomer Eric Elst at ESO 's La Silla Observatory in northern Chile. The asteroid was named

#13 List of unnumbered minor planets

The following is a list of unnumbered minor planets in chronological order of their principal provisional designation . Contrary to their numbered counterparts , unnumbered minor planets have a poorly determined orbit due to insufficient observational data . This also includes lost minor planets whi

#14 List of minor planets discovered using the WISE spacecraft

The following is a list of numbered minor planets discovered, co-discovered and re-discovered by the Wide-field Infrared Survey Explorer (WISE), a NASA infrared spaceborne observatory. As of July 2018, the list contains 4093 entries, accredited by the Minor Planet Center as discovered by "WISE". Not

#15 2006 QQ23

2006 QQ 23 [lower-alpha 1] is a sub-kilometre asteroid , classified as a near-Earth object of the Aten group that is potentially hazardous only as the orbit evolves over millennia . It was first observed on 21 August 2006 by the Siding Spring Survey . [1] [2] On 10 August 2019, the object safely pas

#16 143 Adria

Adria ( minor planet designation : 143 Adria ) is a fairly large main-belt asteroid that was discovered by Austrian astronomer Johann Palisa on 23 February 1875, at the Austrian Naval Observatory , and named after the Adriatic Sea , on the coast of which the discovery was made. This dark-coloured as

#17 4391 Balodis

4391 Balodis , provisional designation 1977 QW 2 , is a dark and rare Erigone asteroid from the inner regions of the asteroid belt , approximately 8 kilometers in diameter. It was discovered by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Cr

#18 1568 Aisleen

1568 Aisleen , provisional designation 1946 QB , is a stony Phocaea asteroid from the inner regions of the asteroid belt , approximately 12.5 kilometers in diameter. It was discovered on 21 August 1946, by South African astronomer Ernest Johnson at Johannesburg Observatory in South Africa. [14] It i

#19 2006 QH181

2006 QH 181 , also written as 2006 QH181 , is a trans-Neptunian object (TNO) in the scattered disc . [2] [3] Its orbit is currently too poorly determined ( U =6) [4] to know whether it is in a resonance with Neptune . 2006 QH 181 Hubble Space Telescope image of 2006 QH 181 taken in 2010 Discovery Di


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Book / Book


#1 American Eclipse (book)

American Eclipse is a book by David Baron about the popular impression of the 1878 solar eclipse as observed across the United States. Its full subtitle is, "A Nation's Epic Race to Catch the Shadow of the Moon and Win the Glory of the World". Book by David Baron American Eclipse Author David Baron


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Comet / Comet


#1 23P/Brorsen–Metcalf

23P/Brorsen–Metcalf is a periodic comet with an orbital period of 70 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years). [1] It was first discovered by Theodor Brorsen at the Altona Observatory on July 20, 1847, and again by Kaspar Schweizer ( Moscow


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Galaxy / Galaxy


#1 North America Nebula

The North America Nebula ( NGC 7000 or Caldwell 20 ) is an emission nebula in the constellation Cygnus , close to Deneb (the tail of the swan and its brightest star ). The shape of the nebula resembles that of the continent of North America , complete with a prominent Gulf of Mexico. Emission nebula

#2 NGC 891

NGC 891 (also known as Caldwell 23 , the Silver Sliver Galaxy , and the Outer Limits Galaxy ) is an edge-on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda . It was discovered by William Herschel on October 6, 1784. [3] The galaxy is a member of the NGC 1023 g


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Institution / Institution


#1 European Astronomical Society

The European Astronomical Society ( EAS ) is a learned society , founded under the Swiss Civil Code in 1990, as an association to contribute and promote the advancement of astronomy in Europe, and to deal with astronomical matters at a European level. It is a society of individual professional astro

#2 Pic du Midi de Bigorre

The Pic du Midi de Bigorre or simply the Pic du Midi (elevation 2,877   m (9,439   ft) ) is a mountain in the French Pyrenees . It is the site of the Pic du Midi Observatory. Not to be confused with Pic du Midi d'Ossau . Pic du Midi de Bigorre Highest   point Elevation 2,877   m (9,439   ft) Promine

#3 Astronomical Observatory of Mallorca

The Astronomical Observatory of Mallorca ( Spanish : Observatorio Astronómico de Mallorca , OAM ) is an observatory just south of Costitx , Mallorca , Spain . [3] Observatory Astronomical Observatory of Mallorca Alternative   names ca Observatory   code 620   Location Costitx , Mallorca , Spain Coor

#4 List of solar eclipses visible from Russia

This list of solar eclipses visible from Russia enumerates the solar eclipses that have been seen and will be seen in Russia . Lists of solar eclipses Geometry of a total solar eclipse (not to scale) Solar eclipses in antiquity Solar eclipses in the Middle Ages Modern history 16th 17th 18th 19th 20t

#5 Andrushivka Astronomical Observatory

Andrushivka Astronomical Observatory ( Ukrainian : Андрушівська астрономічна обсерваторія ) is a private astronomical observatory in the town suburbs of Andrushivka , Zhytomyr Oblast , Ukraine . It was established in 2001. [2] The founder and director of the observatory is Yuri Ivashchenko . The obs

#6 Cerro Tololo Inter-American Observatory

The Cerro Tololo Inter-American Observatory ( CTIO ) is an astronomical observatory located on Cerro Tololo in the Coquimbo Region of northern Chile , with additional facilities located on Cerro Pachón about 10 kilometres (6.2   mi) to the southeast. It is approximately 80 kilometres (50   mi) east

#7 British Astronomical Association

The British Astronomical Association ( BAA ) was formed in 1890 as a national body to support the UK's amateur astronomers . Association of amateur astronomers British Astronomical Association Abbreviation BAA Formation 1890 Legal status Non-profit company Purpose Amateur astronomy Location Tonbridg

#8 Network for Astronomy School Education

Network for Astronomy School Education (NASE) is an International Astronomical Union (IAU) Working Group that works on Training Teachers for primary and secondary schools. In 2007, professor George K. Miley , IAU vice-president, invited Rosa M. Ros to begin exploring the idea of setting up an astron

#9 Union Observatory

Union Observatory also known as Johannesburg Observatory ( 078 ) is a defunct astronomical observatory in Johannesburg , South Africa that was operated between 1903 and 1971. It is located on Observatory Ridge , the city's highest point at 1,808 metres altitude in the suburb Observatory . [1] [2] De

#10 National Solar Observatory

The National Solar Observatory ( NSO ) is a United States public research institute to advance the knowledge of the physics of the Sun . NSO studies the Sun both as an astronomical object and as the dominant external influence on Earth . NSO is headquartered in Boulder and operates facilities at two

#11 Apollo Telescope Mount

The Apollo Telescope Mount , or ATM , was a crewed solar observatory that was a part of Skylab , the first American space station . It could observe the Sun in wavelengths ranging from soft X-rays, ultra-violet, and visible light. Solar observatory on Skylab Apollo Telescope Mount Image of the ATM w

#12 Črni Vrh Observatory

The Črni Vrh Observatory ( Slovene : Observatorij Črni Vrh , IAU code : 106 ) is an astronomical observatory located in western Slovenia , close to the settlement of Črni Vrh , near the town of Idrija . The current observatory was built in 1985 and stands at an elevation of 730 metres (2,400   ft) .

#13 Campo Imperatore Near-Earth Object Survey

The CINEOS program ( Campo Imperatore Near-Earth Object Survey ), started in 2001, is dedicated to the discovery and follow-up of near-Earth objects (NEOs), namely asteroids and comets which periodically approach or intersect the Earth's orbit . In particular CINEOS is addressed to the discovery of

#14 IAU Working Group on Star Names

The International Astronomical Union (IAU) established a Working Group on Star Names ( WGSN ) in May 2016 to catalog and standardize proper names for stars for the international astronomical community. [1] It operates under Division   C – Education, Outreach and Heritage. [2] IAU group to catalog an


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Meteorite / Meteorite


#1 TrES-2b

TrES-2b ( TrES-2 or Kepler -1b ) is an extrasolar planet orbiting the star GSC 03549-02811 located 750 light years away from the Solar System . The planet has been identified in 2011 as the darkest known exoplanet , reflecting less than 1% of any light that hits it. [4] The planet's mass and radius


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Nebula / Nebula


#1 Puppis A

Puppis A ( Pup A ) is a supernova remnant (SNR) about 100 light-years in diameter and roughly 6500–7000 light-years distant. [1] Its apparent angular diameter is about 1 degree. [2] The light of the supernova explosion reached Earth approximately 3700 years ago. Although it overlaps the Vela Superno


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Researcher / Researcher


#1 Odon Godart

Odon Godart (August 21, 1913 – April 18, 1996) was a Belgian astronomer and meteorologist . Belgian astronomer and meteorologist (1913 — 1996) This article is an orphan , as no other articles link to it . Please introduce links to this page from related articles ; try the Find link tool for suggesti

#2 Ulugh Beg

Mīrzā Muhammad Tāraghay bin Shāhrukh ( Chagatay : میرزا محمد طارق بن شاہ رخ , Persian : میرزا محمد تراغای بن شاہ رخ ), better known as Ulugh Beg ( الغ‌ بیگ ) (22 March 1394 – 27 October 1449), was a Timurid sultan , as well as an astronomer and mathematician . Timurid sultan, astronomer and mathemat

#3 Ladislav Brožek

Ladislav Brožek (born 1952) is a Slovak astronomer . [2] At the Bohemian Kleť Observatory , he discovered a total of 23 minor planets between 1979 and 1982, as credited by the Minor Planet Center . [1] Slovak astronomer Minor planets discovered: 23   [1] see §   List of discovered minor planets One

#4 Kin Endate

Kin Endate ( 円館 金 , Endate Kin , born December 15, 1960) is a Japanese amateur astronomer who has discovered hundreds of asteroids, most of them in collaboration with Kazuro Watanabe , placing him among the most prolific discoverers of minor planets . [1] Minor planets discovered: 624   [1] see §  

#5 Eugène Joseph Delporte

Eugène Joseph Delporte (10 January 1882   – 19 October 1955) was a Belgian astronomer born in Genappe . [2] [3] Belgian astronomer Minor planets discovered: 66   [1] see §   List of discovered minor planets He discovered a total of sixty-six asteroids . Notable discoveries include 1221 Amor (which l

#6 Yoshikane Mizuno

Yoshikane Mizuno ( 水野 義兼 , Mizuno Yoshikane , born 1954) is a Japanese astronomer and co-discoverer of asteroids . [2] The Minor Planet Center credits him with the discovery of 52 minor planets he made at the Kani Observatory ( 403 ) between 1989 and 1993. [1] Japanese astronomer Minor planets disco

#7 Paul Murdin

Paul Geoffrey Murdin OBE FRAS (born 5 January 1942) is a British astronomer . He identified the first clear candidate for a black hole , Cygnus X-1 , with his colleague Louise Webster . British astronomer Prof Paul Murdin OBE FRAS Paul Murdin and Roger Davies , NAM (2012) 2nd President of the Europe

#8 Lindsay Glesener

Lindsay Erin Glesener is an assistant professor in the University of Minnesota Institute for Astrophysics. She is a National Science Foundation CAREER Award researcher and lead investigator on the FOXSI Sounding Rocket . American astrophysicist Lindsay Glesener Glesener and rocket Alma   mater San F

#9 Ernest Leonard Johnson

Ernest Leonard Johnson (1891–1977) was a South African astronomer and a former staff member of the Union Observatory in Johannesburg, South Africa. He is known for the discovery of 18 asteroids between 1946–1951, as well as several comets . [1] On 25 August 1949, he discovered 48P/Johnson , a period

#10 Kazuro Watanabe

Kazurō Watanabe ( 渡辺 和郎 , Watanabe Kazurō , born May 1, 1955) is a Japanese amateur astronomer and prolific discoverer of minor planets . [2] He was born in Hokkaidō , Japan and is a member of the Astronomical Society of Japan as well as of the Oriental Astronomical Association . Japanese astronomer

#11 Stefano Sposetti

Stefano Sposetti (born 22 December 1958) is a Swiss amateur astronomer and a prolific discoverer of minor planets . [2] [3] He lives in Gnosca , in the Italian-speaking part of Switzerland in the Ticino Alps , where the Gnosca Observatory is located. Swiss astronomer Flyby of Asteroid 2004 FH in Mar

#12 Michel Mayor

Michel Gustave Édouard Mayor ( French pronunciation:   ​ [miʃɛl majɔʁ] ; born 12 January 1942) [1] is a Swiss astrophysicist and professor emeritus at the University of Geneva 's Department of Astronomy . [2] He formally retired in 2007, but remains active as a researcher at the Observatory of Genev

#13 Paul G. Comba

Paul G. Comba (1926 – April 5, 2017) was an Italian-American computer scientist , an amateur astronomer and a prolific discoverer of minor planets . [2] Paul G. Comba Born 1926   ( 1926 ) Tunisia Died April 4, 2017 (2017-04-04) (aged   90–91) Education Ph.D. Alma   mater University of Turin , Blufft

#14 Giacomo F. Maraldi

Giacomo Filippo Maraldi (21 August 1665 – 1 December 1729) was a French - Italian astronomer and mathematician . His name is also given as Jacques Philippe Maraldi . Born in Perinaldo (modern Liguria ) he was the nephew of Giovanni Cassini , and worked most of his life at the Paris Observatory (1687

#15 Marc Buie

Marc William Buie ( / ˈ b uː i / ; born 1958) is an American astronomer and prolific discoverer of minor planets who works at the Southwest Research Institute in Boulder, Colorado in the Space Science Department. [1] Formerly he worked at the Lowell Observatory in Flagstaff, Arizona, and was the Sen

#16 Freimut Börngen

Freimut Börngen ( German: [ˈfʁaɪmuːt ˈbœʁŋən] ; 17 October 1930 – 19 June 2021) was a German astronomer and a prolific discoverer of minor planets . [2] A few sources give his first name wrongly as "Freimuth". The Minor Planet Center credits him as F. Borngen . German astronomer (1930–2021) Minor pl

#17 Duncan Steel

Duncan I. Steel is a British space scientist . [1] He has discovered several minor planets and has written four popular science books. He is a member of the International Astronomical Union , which lists him as working at the Xerra Earth Observation Institute in Nelson , in the South Island of New Z

#18 William Wallace Campbell

William Wallace Campbell (April 11, 1862 – June 14, 1938) was an American astronomer , and director of Lick Observatory from 1901 to 1930. He specialized in spectroscopy . [1] [2] [3] He was the tenth president of the University of California from 1923 to 1930. American astronomer William Wallace Ca

#19 Jaume Nomen

Jaume Nomen Torres (also: Jaime Nomen ; born June 23, 1960 in Tortosa , Catalonia) is a Spanish oral and maxillofacial surgeon , amateur astronomer and discoverer of numerous minor planets . He is of Catalan origin and became publicly known for the discovery of the near-Earth asteroid 2012 DA 14 (la

#20 Lowell Wood

Lowell Lincoln Wood Jr. (born 1941) is an American astrophysicist who has been involved with the Strategic Defense Initiative and with geoengineering studies. He has been affiliated with Lawrence Livermore National Laboratory and the Hoover Institution , and chaired the EMP Commission . [1] Wood is


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Star / Star


#1 Beta Draconis

Beta Draconis , a name Latinized from β Draconis , is a binary star system [10] and the third-brightest star in the northern circumpolar constellation of Draco . The two components are designated Beta Draconis A (officially named Rastaban / ˈ r æ s t ə b æ n / , the traditional name of the system) [

#2 Alpha Piscium

Alpha Piscium ( α   Piscium ) is a binary star [6] system in the equatorial constellation of Pisces . Based upon parallax measurements made by the Hipparcos spacecraft , it is about 151   light-years from the Solar System . Binary star system in the constellation Pisces α Piscium Location of α Pisci

#3 Sterope (star)

The Sterope / ˈ s t ɛr ə p iː / or Asterope / ə ˈ s t ɛr ə p iː / [1] system is a double star in the zodiac constellation of Taurus . Its components have the Flamsteed designations 21 Tauri and 22 Tauri , [2] and are sometimes known as Sterope I and Sterope II , respectively. [3] Position of the Ast

#4 Beta Aquilae

Beta Aquilae , Latinized from β Aquilae , is a triple star [12] system in the equatorial constellation of Aquila . It is visible to the naked eye as a point-like source with an apparent visual magnitude of 3.87. [2] Based on parallax measurements obtained during the Hipparcos mission, it is located

#5 19 Tauri

19 Tauri is a double star in the constellation of Taurus and a member of the Pleiades open star cluster ( M45 ). Triple star system in the constellation Taurus 19 Tauri 19 Tauri in the Pleiades cluster (circled) Observation data Epoch J2000.0             Equinox J2000.0 Constellation Taurus Right as

#6 Beta Ophiuchi

Beta Ophiuchi or β Ophiuchi , also named Cebalrai / ˌ s ɛ b əl ˈ r eɪ . iː / , [13] [14] is a star in the equatorial constellation of Ophiuchus . The apparent visual magnitude of this star is 2.7, [2] which is readily visible to the naked eye even from urban skies. The distance to this star can be e

#7 Beta Scorpii

Beta Scorpii ( β Scorpii , abbreviated Beta Sco , β Sco ) is a multiple star system in the southern zodiac constellation of Scorpius . It bore the traditional proper name of Acrab / ˈ æ k r æ b / , [8] though the International Astronomical Union now regards that name as applying only to the β Scorpi

#8 Epsilon Boötis

Epsilon Boötis ( ε Boötis , abbreviated Epsilon Boo , ε Boo ), officially named Izar / ˈ aɪ z ɑːr / , [16] is a binary star in the northern constellation of Boötes . The star system can be viewed with the unaided eye at night, but resolving the pair with a small telescope is challenging; an aperture

#9 Sigma Sagittarii

Sigma Sagittarii , Latinized from σ   Sagittarii ; formally named Nunki / ˈ n ʌ ŋ k i / , [13] [14] is the second-brightest star in the constellation of Sagittarius . It has an apparent magnitude of +2.05, [3] making it readily visible to the naked eye. The distance to this star, determined using pa

#10 Celaeno (star)

Celaeno / s ə ˈ l iː n oʊ / , [10] designated 16 Tauri , is a star in the constellation of Taurus and a member of the Pleiades open star cluster ( M45 ) of stars. Star in the Taurus constellation Celaeno Celaeno in the Pleiades cluster (circled) Observation data Epoch J2000             Equinox J2000

#11 Gamma Ursae Minoris

Gamma Ursae Minoris ( γ Ursae Minoris , abbreviated Gamma UMi , γ UMi ), also named Pherkad / ˈ f ɜːr k æ d / , [10] [11] is a star in the northern circumpolar constellation of Ursa Minor . Together with Beta Ursae Minoris (Kochab), it forms the end of the dipper pan of the "Little Dipper", which is

#12 Beta Arietis

Beta Arietis ( β Arietis , abbreviated Beta Ari , β Ari ), officially named Sheratan / ˈ ʃ ɛr ə t æ n / , [12] [13] is a star system and the second-brightest star in the constellation of Aries , marking the ram's second horn. Binary star system in the constellation Aries β Arietis Location of β Arie

#13 Atlas (star)

Atlas / ˈ æ t l ə s / , [9] designation 27 Tauri , is a triple star system [ not verified in body ] in the constellation of Taurus . It is a member of the Pleiades , an open star cluster ( M45 ). It is 431 light-years (132 parsecs ) away, [7] and is 3.92 degrees north of the ecliptic . Triple star s

#14 SAX J1808.4−3658

A transient X-ray source first discovered in 1996 by the Italian-Dutch BeppoSAX satellite, SAX J1808.4−3658 revealed X-ray pulsations at the 401   Hz neutron star spin frequency when it was observed during a subsequent outburst in 1998 by NASA 's RXTE satellite. [2] The neutron star is orbited by a

#15 Alpha Serpentis

Alpha Serpentis or α Serpentis , formally named Unukalhai ( / ˌ juː n ə k . æ l ˈ h eɪ / ), [10] [11] is a double star in the head (Serpens Caput) of the equatorial constellation of Serpens . With an apparent visual magnitude of 2.6, [2] this star is the brightest in the constellation and it can be

#16 Gamma Lyrae

Gamma Lyrae , Latinised from γ Lyrae , and formally named Sulafat / ˈ s uː l ə f æ t / , [9] [10] is the second-brightest star in the northern constellation of Lyra . With an apparent visual magnitude of 3.3, [2] it is readily visible to the naked eye. Parallax measurements yield an estimated distan

#17 Alpha Capricorni

Alpha Capricorni ( α Capricorni , abbreviated Alpha Cap , α Cap ) is an optical double star in the constellation of Capricornus . The two physically unrelated components are designated: α¹ Capricorni α² Capricorni (also named Algedi [1] ). Optical double star in the constellation Capricorn They are

#18 Alpha2 Capricorni

Alpha 2 Capricorni ( α 2 Capricorni ), or Algedi / æ l ˈ dʒ iː d i / , [9] [10] is a triple star system [11] in the southern constellation of Capricornus . It is visible to the naked eye with an apparent visual magnitude of +3.57. [2] It is separated from the fainter α¹ Capricorni by 0.11° of the sk

#19 Alpha Aquarii

Alpha   Aquarii , officially named Sadalmelik ( / ˌ s æ d əl ˈ m ɛ l ɪ k / ), [12] is a single star in the constellation of Aquarius . The apparent visual magnitude of 2.94 [2] makes this the second-brightest star in Aquarius. Based upon parallax measurements made during the Hipparcos mission, it is

#20 Theta Centauri

Theta Centauri or θ Centauri , officially named Menkent ( / ˈ m ɛ ŋ k ɛ n t / ), [11] [12] is a single [6] star in the southern constellation of Centaurus , the centaur . With an apparent visual magnitude of +2.06, [2] it is the fourth-brightest member of the constellation . Based on parallax measur


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