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langs: 28 апреля [ru] / april 28 [en] / 28. april [de] / 28 avril [fr] / 28 aprile [it] / 28 de abril [es]

days: april 25 / april 26 / april 27 / april 28 / april 29 / april 30 / may 1

Asteroid / Asteroid


#1 2956 Yeomans

2956 Yeomans , provisional designation 1982 HN 1 , is a stony asteroid from the central regions of the asteroid belt , approximately 10 kilometers in diameter. It was discovered on 28 April 1982, by astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory in near Flagstaff, Ar

#2 4786 Tatianina

4786 Tatianina , provisional designation 1985 PE 2 , is a bright background asteroid and synchronous binary system from the inner regions of the asteroid belt , approximately 3.4 kilometers (2.1 miles) in diameter. It was discovered on 13 August 1985, by Soviet astronomer Nikolai Chernykh at the Cri

#3 (391211) 2006 HZ51

(391211) 2006 HZ 51 is a bright, sub-kilometer asteroid on an eccentric orbit, classified as a near-Earth object and a potentially hazardous asteroid of the Amor group . It was discovered on 27 April 2006, by astronomers of the Catalina Sky Survey conducted at Mount Lemmon Observatory , Arizona , Un

#4 4707 Khryses

4707 Khryses / ˈ k r aɪ s iː z / is a larger Jupiter trojan from the Trojan camp , approximately 40 kilometers (25 miles) in diameter. It was discovered on 13 August 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. [1] The assumed C-type asteroid has a rotatio

#5 2021 LL37

2021 LL 37 is a large trans-Neptunian object in the scattered disc , around 600 kilometres (370 miles) in diameter. It was discovered on 12 June 2021, by American astronomers Scott Sheppard and Chad Trujillo using Cerro Tololo Inter-American Observatory 's Dark Energy Camera in Chile, and announced

#6 4709 Ennomos

4709 Ennomos / ˈ ɛ n ə m ə s / is a large Jupiter trojan from the Trojan camp and the namesake of the small Ennomos family , approximately 81 kilometers (50 miles) in diameter. It was discovered on 12 October 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. [1

#7 751 Faïna

751 Faïna ( prov. designation : A913 HE or 1913 RK ) is a very large background asteroid from the central regions of the asteroid belt , approximately 110 kilometers (68 miles) in diameter. It was discovered on 28 April 1913, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Cri

#8 2017 XO2

2017 XO 2 , also written 2017 XO2 , is a sub-kilometer asteroid and near-Earth object of the Apollo group approximately 110 meters (360 feet) in diameter. The asteroid was discovered by Pan-STARRS in December 2017, [1] after it already had approached Earth at 0.051   AU (7,600,000   km ) or 20 lunar

#9 2020 HS7

2020 HS 7 is a very small asteroid classified as a near-Earth object of the Earth-crossing Apollo group . When it was discovered by the Pan-STARRS 2 survey on 27 April 2020, the asteroid was initially calculated to have a 10% chance of impact with Earth before being ruled out by improved orbit deter

#10 2020 HA10

2020 HA 10 is a near-Earth object of the Atira group . 2020 HA 10 Discovery   [1] Discovered   by Mount Lemmon Survey Discovery   site Mount Lemmon Obs. Discovery   date 28 April 2020 (first observed only) Designations MPC   designation 2020 HA 10 Minor   planet category NEO   · Atira   [1] Orbital

#11 826 Henrika

826 Henrika ( prov. designation : A916 HD or 1916 ZO ) is a background asteroid from the central regions of the asteroid belt . It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 28 April 1916. [1] The carbonaceous C-type asteroid has a rotation period

#12 4151 Alanhale

4151 Alanhale , provisional designation 1985 HV 1 , is a carbonaceous Themistian asteroid from the outer region of the asteroid belt , approximately 19 kilometers in diameter. It was discovered by the American astronomer couple Carolyn and Eugene Shoemaker at the U.S. Palomar Observatory , Californi

#13 1242 Zambesia

1242 Zambesia ( prov. designation : 1932 HL ) is a dark background asteroid from the central regions of the asteroid belt , approximately 48 kilometers (30 miles) in diameter. It was discovered on 28 April 1932, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. [14]

#14 3343 Nedzel

3343 Nedzel , provisional designation 1982 HS , is an asteroid and sizable Mars-crosser on an eccentric orbit from the inner regions of the asteroid belt , approximately 6.5 kilometers in diameter. It was discovered on 28 April 1982, by astronomer Laurence Taff at the Lincoln Laboratory's Experiment

#15 788 Hohensteina

788 Hohensteina is a main-belt asteroid discovered on 4 April 1914 by Franz Kaiser at Heidelberg-Königstuhl State Observatory . [1] Named for castle Hohenstein located in the Taunus mountains. [8] 788 Hohensteina Discovery   [1] Discovered   by Franz Kaiser Discovery   site Heidelberg-Königstuhl Sta

#16 4543 Phoinix

4543 Phoinix is a large Jupiter trojan from the Greek camp , approximately 63 kilometers (39 miles) in diameter. It was discovered on 2 February 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. [1] The assumed C-type asteroid is possibly elongated and has a lo

#17 2093 Genichesk

2093 Genichesk , provisional designation 1971 HX , is a Baptistina asteroid from the inner regions of the asteroid belt , approximately 12 kilometers in diameter. It was discovered on 28 April 1971, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Cr

#18 1029 La Plata

1029 La Plata , provisional designation 1924 RK , is a stony Koronis asteroid from the outer regions of the asteroid belt , approximately 20 kilometers (12 miles) in diameter. It was discovered on 28 April 1924, by German astronomer Johannes Hartmann at the La Plata Astronomical Observatory in Argen

#19 (24978) 1998 HJ151

(24978) 1998 HJ 151 , also written as (24978) 1998 HJ151 , is a cubewano . It has a perihelion (closest approach to the Sun ) of 41.339 AU and an aphelion (farthest approach to the Sun ) of 45.889 AU. It has a diameter of about 139   km. It was discovered on 28 April 1998, by Jane X. Luu , Chadwick

#20 4175 Billbaum

4175 Billbaum , provisional designation 1985 GX , is a background asteroid from the central regions of the asteroid belt , approximately 9 kilometers (6 miles) in diameter. It was discovered on 15 April 1985, by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory


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Comet / Comet


#1 C/2020 F8 (SWAN)

C/2020 F8 (SWAN) , or Comet SWAN, is an Oort cloud comet that was discovered in images taken by the Solar Wind Anisotropies (SWAN) camera on March 25, 2020, aboard the Solar Heliospheric Observer (SOHO) spacecraft. [2] [1] In the glare of twilight , Comet SWAN is difficult to find with 50mm binocula

#2 Comet Kohoutek

Comet Kohoutek ( formally designated C/1973 E1 and formerly as 1973 XII and 1973f ) [lower-alpha 3] is a comet that passed close to the Sun towards the end of 1973. Early predictions of the comet's peak brightness suggested that it had the potential to become one of the brightest comets of the 20th


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Galaxy / Galaxy


#1 Messier 61

Messier 61 (also known as M61 or NGC 4303 ) is an intermediate barred spiral galaxy in the Virgo Cluster of galaxies. It was first discovered by Barnaba Oriani on May 5, 1779, six days before Charles Messier discovered the same galaxy. Messier had observed it on the same night as Oriani but had mist

#2 NGC 4163

NGC 4163 , also known as NGC 4167 is a dwarf irregular galaxy in constellation Canes Venatici , about 9.65 million light-years away. It was discovered by William Herschel on April 28, 1785 as NGC 4163. John Herschel discovered it again on March 11, 1831 as NGC 4167. It has a size on night sky 1.9' x

#3 NGC 4467

NGC 4467 is an elliptical galaxy located about 78 million light-years away [2] in the constellation of Virgo . [3] NGC 4467 was discovered by astronomer Otto Struve on April 28, 1851. [4] NGC 4467 is a companion of Messier 49 and is a member of the Virgo Cluster . [5] Elliptical galaxy in the conste

#4 NGC 6181

NGC 6181 is a barred spiral galaxy located in the constellation Hercules . It is designated as SB(rs)c in the galaxy morphological classification scheme and was discovered by William Herschel on 28 April 1788. The galaxy is 107 million light years away. [1] [2] [3] Galaxy in the constellation Hercul


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Institution / Institution


#1 CfA 1.2 m Millimeter-Wave Telescope

The 1.2 meter Millimeter-Wave Telescope at the Center for Astrophysics | Harvard & Smithsonian and its twin instrument at CTIO in Chile have been studying the distribution and properties of molecular clouds in our galaxy and its nearest neighbours since the 1970s. The telescope is nicknamed "The Min

#2 Stratospheric Observatory for Infrared Astronomy

The Stratospheric Observatory for Infrared Astronomy ( SOFIA ) was an 80/20 joint project of NASA and the German Aerospace Center (DLR) [1] to construct and maintain an airborne observatory . NASA awarded the contract for the development of the aircraft, operation of the observatory and management o

#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 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

#6 VERITAS

VERITAS ( Very Energetic Radiation Imaging Telescope Array System ) is a major ground-based gamma-ray observatory with an array of four 12 meter optical reflectors for gamma-ray astronomy in the GeV – TeV photon energy range. VERITAS uses the Imaging Atmospheric Cherenkov Telescope technique to obse


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Meteorite / Meteorite


#1 Norton County (meteorite)

Norton County is an Aubrite meteorite that fell in 1948 in Kansas , United States . Norton County Type Achondrite Class Asteroidal achondrite [ citation needed ] Group Aubrite Country United States Region Kansas Coordinates 39°41′N 99°52′W [1] Observed fall Yes Fall date February 18, 1948 TKW 1100 k


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Researcher / Researcher


#1 William Wallace (mathematician)

William Wallace FRSE MInstCE FRAS LLD (23 September 1768   – 28 April 1843) was a Scottish mathematician and astronomer who invented the eidograph (an improved pantograph ). Scottish mathematician and astronomer For other people named William Wallace, see William Wallace (disambiguation) . William W

#2 Louis G. Henyey

Louis George Henyey (February 3, 1910 – February 18, 1970) was an American astronomer . American astronomer Louis G. Henyey Born 3 February 1910   McKees Rocks   Died 18 February 1970   (aged 60) Berkeley   Alma   mater University of Chicago Case Western Reserve University   Employer Yerkes Observat

#3 Edward Joshua Cooper

Edward Joshua Cooper (May 1798 – 23 April 1863) [1] was an Irish landowner, politician and astronomer from Markree Castle in County Sligo . He sat in the House of Commons of the United Kingdom from 1830 to 1841 and from 1857 to 1859, but is best known for his astronomy, and as the creator of Markree

#4 Thierry Pauwels

Thierry Pauwels (born 22 July 1957, Ghent ) is a Belgian astronomer from the Royal Observatory of Belgium . [2] [3] Between 1996 and 2008 he discovered and co-discovered 146 minor planets . This makes him one of the top 100 minor planet discoverers. [1] Belgian astronomer Minor planetss discovered:

#5 Max Wolf

Maximilian Franz Joseph Cornelius Wolf (21 June 1863 – 3 October 1932) was a German astronomer and a pioneer in the field of astrophotography . He was the chairman of astronomy at the University of Heidelberg and director of the Heidelberg-Königstuhl State Observatory from 1902 until his death in 19

#6 Walter Ferreri

Walter Ferreri (born 1948), originally from Buddusò in Sardinia, is an astronomer at the Italian Osservatorio Astronomico di Torino , science writer and discoverer of minor planets. Minor planets discovered: 15   [1] 3625 Fracastoro 27 April 1984 list 3778 Regge 26 April 1984 list 4061 Martelli 19 M

#7 Eugene Merle Shoemaker

Eugene Merle Shoemaker (April 28, 1928   – July 18, 1997) was an American geologist . He co-discovered Comet Shoemaker–Levy 9 with his wife Carolyn S. Shoemaker and David H. Levy . This comet hit Jupiter in July 1994: the impact was televised around the world. Shoemaker also studied terrestrial crat

#8 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

#9 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

#10 George Smoot

George Fitzgerald Smoot III (born February 20, 1945) is an American astrophysicist , cosmologist , Nobel laureate, and the 2nd contestant to win the $1 million prize on Are You Smarter than a 5th Grader? . He won the Nobel Prize in Physics in 2006 for his work on the Cosmic Background Explorer with

#11 Bart Bok

Bartholomeus Jan " Bart " Bok (April 28, 1906 – August 5, 1983) was a Dutch-American astronomer , teacher, and lecturer. He is best known for his work on the structure and evolution of the Milky Way galaxy, and for the discovery of Bok globules , which are small, densely dark clouds of interstellar

#12 Krisztián Sárneczky

Krisztián Sárneczky (born 6 November 1974 in Budapest ) is a Hungarian teacher of geography [1] and prolific discoverer of minor planets and supernovae , researching at Konkoly Observatory in Budapest, Hungary. He is a board member of the Hungarian Astronomical Association (HAA) [2] and member of th

#13 Oskar Backlund

Johan Oskar Backlund (28 April 1846 – 29 August 1916) was a Swedish - Russian astronomer . His name is sometimes given as Jöns Oskar Backlund , however even contemporary Swedish sources give "Johan". In Russia , where he spent his entire career, he is known as Oskar Andreevich Baklund (Оскар Андреев

#14 Robert H. McNaught

Robert H. McNaught (born in Scotland in 1956) is a Scottish-Australian astronomer at the Research School of Astronomy and Astrophysics of the Australian National University (ANU). He has collaborated with David J. Asher of the Armagh Observatory . Scottish-Australian astronomer (born 1956) Minor pla

#15 Johann Palisa

Johann Palisa (6 December 1848 – 2 May 1925) was an Austrian astronomer , born in Troppau , Austrian Silesia , now Czech Republic . [1] He was a prolific discoverer of asteroids , discovering 122 in all, from 136 Austria in 1874 to 1073 Gellivara in 1923. [2] Some of his notable discoveries include

#16 John Broughton

John Broughton (born 1952) [2] is an Australian amateur astronomer and artist. He is among the most prolific discoverers of minor planets worldwide, credited by the Minor Planet Center with more than a thousand discoveries made between 1997 and 2008. [1] His observations are done at Reedy Creek Obse

#17 Cyril Jackson (astronomer)

Cyril V. Jackson (5 December 1903 – February 1988) was a South African astronomer , known for discovering 72 asteroids and a number of comets. South African astronomer Asteroids discovered: 72 1116 Catriona 5 April 1929 1186 Turnera 1 August 1929 1193 Africa 24 April 1931 1194 Aletta 13 May 1931 119

#18 Grigory Neujmin

Grigory Nikolayevich Neujmin ( Russian : Григорий Николаевич Неуймин ; 3 January 1886 [ O.S. 22 December 1885 ] – 17 December 1946) was a Georgian– Russian astronomer , native of Tbilisi in Georgia , [2] and a discoverer of numerous minor planets as well as 6 periodic and a hyperbolic comet at the P

#19 Tamara Smirnova

Tamara Mikhaylovna Smirnova ( Russian : Тама́ра Миха́йловна Смирно́ва ; 1935–2001) was a Soviet / Russian astronomer and a discoverer of minor planets and comets . [2] Russian astronomer Minor planets discovered: 135   [1] see §   List of discovered minor planets

#20 Francis Baily

Francis Baily (28 April 1774   – 30 August 1844) was an English astronomer . He is most famous for his observations of " Baily's beads " during a total eclipse of the Sun. Baily was also a major figure in the early history of the Royal Astronomical Society , as one of the founders and as the preside


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Science / Science


#1 SGR 1935+2154

SGR 1935+2154 (or SGR J1935+2154 ) is a soft gamma repeater (SGR) that is an ancient stellar remnant , in the constellation Vulpecula , originally discovered in 2014 by the Neil Gehrels Swift Observatory . [1] Currently, the SGR-phenomena and the related anomalous X-ray pulsars (AXP) are explained a


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Star / Star


#1 139 Tauri

139 Tauri is a single, [11] blue-white hued star in the zodiac constellation of Taurus . It is faintly visible to the naked eye with an apparent visual magnitude of 4.81. [2] The distance to this star, as determined from an annual parallax shift of 2.10 ± 0.19   mas , [1] is roughly 1,600   light ye

#2 Sun

The Sun is the star at the center of the Solar System . It is a nearly perfect ball of hot plasma , [18] [19] heated to incandescence by nuclear fusion reactions in its core. The Sun radiates the energy mainly as light , ultraviolet , and infrared radiation, and is the most important source of energ


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