Dorado

DoradoConstellation

List of stars in Dorado

Abbreviation| Dor
Genitive| Doradus
Pronunciation| /dəˈreɪdoʊ/, genitive /dəˈreɪdəs/
Symbolism| the dolphinfish
Right ascension|  5h
Declination| −65°
Quadrant| SQ1
Area| 179 sq. deg. (72nd)
Main stars| 3
Bayer/Flamsteed
stars| 14
Stars brighter than 3.00m| 0
Stars within 10.00 pc (32.62 ly)| 1
Brightest star| α Dor (3.27m)
Messier objects| 0
Meteor showers| None
Bordering
constellations| Caelum
Horologium
Reticulum
Hydrus
Mensa
Volans
Pictor
Visible at latitudes between +20° and −90°.
Best visible at 21:00 (9 p.m.) during the month of January.

Dorado (US: /dəˈreɪdoʊ/, also UK: /-ˈrɑːdoʊ/) is a constellation in the Southern Sky. It was named in the late 16th century and is now one of the 88 modern constellations. Its name refers to the mahi-mahi (Coryphaena hippurus), which is known as dorado ("golden") in Spanish, although it has also been depicted as a swordfish. Dorado contains most of the Large Magellanic Cloud, the remainder being in the constellation Mensa. The South Ecliptic pole also lies within this constellation.

Even though the name Dorado is not Latin but Spanish, astronomers give it the Latin genitive form Doradus when naming its stars; it is treated (like the adjacent asterism Argo Navis) as a feminine proper name of Greek origin ending in -ō (like Io or Callisto or Argo), which have a genitive ending -ūs.

## Contents

* 1 History
* 2 Features
* 2.1 Stars
* 2.2 Deep-sky objects
* 3 Equivalents
* 4 Namesakes
* 5 Gallery
* 6 See also
* 7 References
* 8 Sources
* 9 External links

## History

Dorado was one of twelve constellations named by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman.[1] It appeared:

* On a 35-centimetre-diameter (14 in) celestial globe published in 1597 (or 1598) in Amsterdam by Plancius with Jodocus Hondius.
* First depiction in a celestial atlas, in Johann Bayer's Uranometria of 1603.
* In Johannes Kepler's edition of Tycho Brahe's star list in the Rudolphine Tables of 1627; this was the first time that it was given the alternative name Xiphias, the swordfish. The name Dorado ultimately became dominant and was adopted by the IAU.

Dorado represents a dolphinfish; it has also been called the goldfish because Dorado are gold-colored.[2]

## Features

The constellation Dorado as it can be seen by the naked eye

### Stars

See also: Astronomy:List of stars in Dorado

Lacaille gave 15 stars Bayer designations Alpha through Pi in 1756, but omitted Iota, Omicron, and Xi, and labelled two stars as Eta and Pi. Mu Doradus was removed from star catalogues because of its dimness.[3]

Alpha Doradus is a blue-white star of magnitude 3.3, 176 light-years from Earth. It is the brightest star in Dorado. Beta Doradus is a notably bright Cepheid variable star. It is a yellow-tinged supergiant star that has a minimum magnitude of 4.1 and a maximum magnitude of 3.5. One thousand and forty light-years from Earth, Beta Doradus has a period of 9 days and 20 hours.[1]

R Doradus is one of the many variable stars in Dorado. S Dor, 9.721 hypergiant in the Large Magellanic Cloud, is the prototype of S Doradus variable stars. The variable star R Doradus 5.73 has the largest-known apparent size of any star other than the Sun.[4] WOH G64 is a binary system in the Large Magellanic Cloud that contains the largest known star with a well defined radius at 1,540 ± 77 solar radii.[5] Gamma Doradus is the prototype of the Gamma Doradus variable stars.

Supernova 1987A was the closest supernova to occur since the invention of the telescope. SNR 0509-67.5 is the remnant of an unusually energetic Type Ia supernova from about 400 years ago.

HE 0437-5439 is a hypervelocity star escaping from the Milky Way/Magellanic Cloud system.

Dorado is also the location of the South Ecliptic pole, which lies near the fish's head. The pole was called "Polus Doradinalis" by Philipp von Zesen, aka Caesius.[6]

In early 2020, the exoplanet TOI-700 d was discovered orbiting the star TOI-700 in Dorado. This is the first potentially Earth-like exoplanet to be discovered by the Transiting Exoplanet Survey Satellite.

### Deep-sky objects

Because Dorado contains part of the Large Magellanic Cloud, it is rich in deep sky objects. The Large Magellanic Cloud, 25,000 light-years in diameter, is a satellite galaxy of the Milky Way Galaxy, located at a distance of 179,000 light-years. It has been deformed by its gravitational interactions with the larger Milky Way. In 1987, it became host to SN 1987A, the first supernova of 1987 and the closest since 1604.[7] This 25,000-light-year-wide galaxy contains over 10,000 million stars.[1] All coordinates given are for Epoch J2000.0.

NGC 1566 is an intermediate spiral galaxy.[8]

* N 180B is an emission nebula located in the Large Magellanic Cloud.
* NGC 1566 (RA 04h 20m 00s Dec -56° 56.3′) is a face-on spiral galaxy. It gives its name to the NGC 1566 Group of galaxies.
* NGC 1755 (RA 04h 55m 13s Dec -68° 12.2′) is a globular cluster.
* NGC 1763 (RA 04h 56m 49s Dec -68° 24.5′) is a bright nebula associated with three type B stars.
* NGC 1761 (RA 04h 56m 37s Dec -66° 28.4') is an open cluster.
* NGC 1820 (RA 05h 04m 02s Dec -67° 15.9′) is an open cluster.
* NGC 1850 (RA 05h 08m 44s Dec -68° 45.7′) is a globular cluster.
* NGC 1854 (RA 05h 09m 19s Dec -68° 50.8′) is a globular cluster.
* NGC 1869 (RA 05h 13m 56s Dec -67° 22.8′) is an open cluster.
* NGC 1901 (RA 05h 18m 15s Dec -68° 26.2′) is an open cluster.
* NGC 1910 (RA 05h 18m 43s Dec -69° 13.9′) is an open cluster.
* NGC 1936 (RA 05h 22m 14s Dec -67° 58.7′) is a bright nebula and is one of four NGC objects in close proximity, the others being NGC 1929, NGC 1934 and NGC 1935.
* NGC 1978 (RA 05h 28m 36s Dec -66° 14.0′) is an open cluster.
* NGC 2002 (RA 05h 30m 17s Dec -66° 53.1′) is an open cluster.
* NGC 2014 (RA 05h 44m 12.7s Dec −67° 42′ 57″) is a red emission nebula.
* NGC 2020 (RA 05h 44m 12.7s Dec −67° 42′ 57″) is an HII region surrounding a Wolf–Rayet star.
* NGC 2027 (RA 05h 35m 00s Dec -66° 55.0′) is an open cluster.
* NGC 2032 (RA 05h 35m 21s Dec -67° 34.1′; also known as "Seagull Nebula") is a nebula complex that contains four NGC designations: NGC 2029, NGC 2032, NGC 2035 and NGC 2040.

LEDA 89996 is a classic example of a spiral galaxy.[9]

* NGC 2074 (RA 05h 39m 03.0s Dec −69° 29′ 54″) is an emission nebula.
* NGC 2078 (RA 05h 39m 54s Dec −69° 44′ 54″) is an emission nebula.
* NGC 2080, also called the "Ghost Head Nebula", is an emission nebula that is 50 light-years wide in the Large Magellanic Cloud. It is named for the two distinct white patches that it possesses, which are regions of recent star formation. The western portion is colored green from doubly ionized oxygen, the southern portion is red from hydrogen alpha emissions, and the center region is colored yellow from both oxygen and hydrogen emissions. The western white patch, A1, has one massive, recently formed star inside. The eastern patch, A2, has several stars hidden in its dust.[7]
* Tarantula Nebula is in the Large Magellanic Cloud, named for its spiderlike shape. It is also designated 30 Doradus, as it is visible to the naked eye as a slightly out-of-focus star. Larger than any nebula in the Milky Way at 1,000 light-years in diameter, it is also brighter, because it is illuminated by the open star cluster NGC 2070, which has at its center the star cluster R136. The illuminating stars are supergiants.[1]
* NGC 2164 (RA 05h 58m 53s Dec -68° 30.9′) is a globular cluster.
* N44 is a superbubble in the Large Magellanic Cloud that is 1,000 light-years wide. Its overall structure is shaped by the 40 hot stars towards its center. Within the superbubble of N44 is a smaller bubble catalogued as N44F. It is approximately 35 light-years in diameter and is shaped by an incredibly hot star at its center, which has a stellar wind speed of 7 million kilometers per hour. N44F also features dust columns with probable star formation hidden inside.[7]

## Equivalents

In Chinese astronomy, the stars of Dorado are in two of Xu Guangqi's Southern Asterisms (近南極星區, Jìnnánjíxīngōu): the White Patches Attached (夾白, Jiābái) and the Goldfish (金魚, Jīnyú).[10]

## Namesakes

* Dorado (SS-248) and Dorado (SS-526), two United States Navy submarines, were named after the same sea creature as the constellation.

## Gallery

* NGC 1706 is a spiral galaxy, about 230 million light-years away.[11]

## See also

* Dorado in Chinese astronomy
* IAU-recognized constellations

## References

Notes

* The above deep sky objects appear in Norton's Star Atlas, 1973 edition.
* Co-ordinates are obtained from Uranometria Chart Index and Skyview.
* Images of the deep sky objects described herein may be viewed at Skyview.

Citations

1. ↑ 1.0 1.1 1.2 1.3 Ridpath & Tirion 2017, pp. 142–143.
2. ↑ Ridpath, Ian. "Dorado". http://www.ianridpath.com/startales/dorado.html.
3. ↑ Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, VA: The McDonald & Woodward Publishing Company. pp. 305–07. ISBN 978-0-939923-78-6.
4. ↑ "R Doradus". SIMBAD. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=r+doradus&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
5. ↑ Levesque, E. M.; Massey, P.; Plez, B.; Olsen, K. A. G. (2009). "The Physical Properties of the Red Supergiant WOH G64: The Largest Star Known?". The Astronomical Journal 137 (6): 4744. doi:10.1088/0004-6256/137/6/4744. Bibcode: 2009AJ....137.4744L.
6. ↑ Allen, R. H.. "Dorado". https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Dorado*.html.
7. ↑ 7.0 7.1 7.2 Wilkins & Dunn 2006.
8. ↑ "Grand swirls". Picture of the Week. ESA/Hubble. http://www.spacetelescope.org/images/potw1422a/.
9. ↑ "Galaxy with a view". http://www.spacetelescope.org/images/potw1527a/.
10. ↑ Script error: The function "in_lang" does not exist. AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日
11. ↑ "Lonely Hearts Club" (in en). https://www.spacetelescope.org/images/potw1943a/.

Cite error: `<ref>` tag with name "Kirkpatrick2024" defined in `<references>` is not used in prior text.

## Sources

* Ridpath, Ian; Tirion, Wil (2017), Stars and Planets Guide, Collins, London, ISBN 978-0-691-17788-5
* Wilkins, Jamie; Dunn, Robert (2006), 300 Astronomical Objects: A Visual Reference to the Universe, Firefly Books, ISBN 978-1-55407-175-3

## External links

| Wikimedia Commons has media related to Dorado.

|

* The Deep Photographic Guide to the Constellations: Dorado
* The clickable Dorado
* Peoria Astronomical Society - Dorado
* Star Tales – Dorado

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Dorado constellation

Stars
(list)|

| Bayer|

* α
* β
* γ
* δ
* ε
* ζ
* η1
* η2
* θ
* κ
* λ
* ν
* π1
* π2

|

Variable|

* R
* S
* RW
* WZ
* XY
* XZ
* AA
* AB
* AZ
* BB

HR|

* 1227
* 1365
* 1405
* 1540
* 1597
* 1598
* 1859
* 1882
* 1917
* 1936
* 2073
* 2102
* 2408

HD|

* 28254
* 30177
* 33579
* 34664
* 36402
* 37974
* 38282
* 38344
* 38489
* 39194
* 269810
* 269858
* 269908

Gliese|

* Gliese 163
* Gliese 167

Other|

* A0538-66
* BAT99-66
* BAT99-68
* BAT99-98
* BAT99-104
* BE 381
* BI 253
* CAL-83
* HE 0437-5439
* HV 883
* LH41-1042
* LH54-425
* LMC195-1
* LMC X-1
* LMC X-2
* LMC X-3
* LMC X-4
* Melnick 34
* Melnick 42
* PSR J0537−6910
* PSR J0540−6919
* R85
* R84
* R99
* R134
* R136a1
* R136a2
* R136a3
* R136a5
* R136b
* R136c
* R139
* R145
* SGR 0525−66
* VFTS 102
* VFTS 352
* VFTS 682
* WASP-62
* WOH G64

Former|

* Sanduleak -69 202 (exploded in 1987)

Star
clusters|

| Association|

* NGC 1712
* NGC 1731
* NGC 1747
* NGC 1748
* NGC 1761
* NGC 1763
* NGC 1769
* NGC 1787
* NGC 1869
* NGC 1871
* NGC 1873
* NGC 1898
* NGC 1910
* NGC 1923
* NGC 1925
* NGC 1935
* NGC 1937
* NGC 1948
* NGC 1955
* NGC 1968
* NGC 2001
* NGC 2014
* NGC 2015
* NGC 2021
* NGC 2033
* NGC 2034
* NGC 2040
* NGC 2044
* NGC 2050
* NGC 2055
* NGC 2074
* NGC 2093

|

Open|

* Hodge 301
* LH 95
* NGC 1641
* NGC 1649
* NGC 1676
* NGC 1693
* NGC 1695
* NGC 1697
* NGC 1698
* NGC 1704
* NGC 1712
* NGC 1718
* NGC 1732
* NGC 1733
* NGC 1734
* NGC 1735
* NGC 1743
* NGC 1745
* NGC 1749
* NGC 1755
* NGC 1764
* NGC 1767
* NGC 1768
* NGC 1772
* NGC 1774
* NGC 1776
* NGC 1782
* NGC 1785
* NGC 1793
* NGC 1795
* NGC 1801
* NGC 1804
* NGC 1810
* NGC 1814
* NGC 1816
* NGC 1820
* NGC 1822
* NGC 1825
* NGC 1826
* NGC 1828
* NGC 1829
* NGC 1830
* NGC 1834
* NGC 1835
* NGC 1836
* NGC 1838
* NGC 1839
* NGC 1842
* NGC 1844
* NGC 1846
* NGC 1847
* NGC 1849
* NGC 1850
* NGC 1852
* NGC 1854/1855
* NGC 1856
* NGC 1858
* NGC 1859
* NGC 1860
* NGC 1862
* NGC 1863
* NGC 1864
* NGC 1865
* NGC 1867
* NGC 1870
* NGC 1872
* NGC 1874
* NGC 1876
* NGC 1877
* NGC 1880
* NGC 1881
* NGC 1882
* NGC 1885
* NGC 1887
* NGC 1894
* NGC 1895
* NGC 1897
* NGC 1900
* NGC 1901
* NGC 1902
* NGC 1903
* NGC 1905
* NGC 1911
* NGC 1913
* NGC 1915
* NGC 1916
* NGC 1917
* NGC 1919
* NGC 1920
* NGC 1922
* NGC 1926
* NGC 1928
* NGC 1929
* NGC 1932
* NGC 1940
* NGC 1941
* NGC 1942
* NGC 1946
* NGC 1949
* NGC 1951
* NGC 1953
* NGC 1958
* NGC 1966
* NGC 1967
* NGC 1969
* NGC 1971
* NGC 1972
* NGC 1974
* NGC 1983
* NGC 1984
* NGC 1994
* NGC 1997
* NGC 2002
* NGC 2003
* NGC 2004
* NGC 2005
* NGC 2006
* NGC 2009
* NGC 2011
* NGC 2027
* NGC 2041
* NGC 2042
* NGC 2053
* NGC 2062
* NGC 2070
* NGC 2077
* NGC 2079
* NGC 2083
* NGC 2084
* NGC 2085
* NGC 2086
* NGC 2088
* NGC 2091
* NGC 2092
* NGC 2094
* NGC 2095
* NGC 2096
* NGC 2097
* NGC 2098
* NGC 2100
* NGC 2102
* NGC 2105
* NGC 2109
* NGC 2113
* NGC 2114
* NGC 2116
* NGC 2117
* NGC 2118
* NGC 2120
* NGC 2123
* NGC 2125
* NGC 2127
* NGC 2130
* NGC 2135
* NGC 2136
* NGC 2137
* NGC 2138
* NGC 2140
* NGC 2147
* NGC 2151
* NGC 2153
* NGC 2154
* NGC 2155
* NGC 2157
* NGC 2160
* NGC 2164
* NGC 2166
* NGC 2172
* NGC 2176
* NGC 2177
* NGC 2181
* NGC 2193
* NGC 2197
* NGC 2214
* NGC 2241

Globular|

* Hodge 11
* NGC 1644
* NGC 1652
* NGC 1696
* NGC 1756
* NGC 1783
* NGC 1786
* NGC 1805
* NGC 1806
* NGC 1818
* NGC 1831
* NGC 1866
* NGC 1868
* NGC 1978
* NGC 2108
* NGC 2156
* NGC 2159
* NGC 2162
* NGC 2210
* NGC 2231
* NGC 2249
* NGC 2257

Nebulae|

| H II|

* N119
* N180B
* N11
* N159
* N44
* N55
* NGC 1722
* NGC 1722
* NGC 1727
* NGC 1737
* NGC 1760
* NGC 1770
* NGC 1773
* NGC 1899
* NGC 1934
* NGC 1936
* NGC 2030
* NGC 2032
* NGC 2080
* NGC 2081
* Tarantula Nebula

|

Planetary|

* LMC-N66

SNR|

* Honeycomb Nebula
* LMC N49
* NGC 1918
* NGC 2029
* NGC 2060
* SNR 0509-67.5

Galaxies|

| NGC|

* 1500
* 1506
* 1515
* 1522
* 1533
* 1546
* 1549
* 1553
* 1556
* 1566
* 1578
* 1581
* 1596
* 1602
* 1617
* 1669
* 1672
* 1688
* 1703
* 1706
* 1765
* 1771
* 1796
* 1809
* 1824
* 1853
* 1892
* 1947
* 2082
* 2150
* 2187
* 2228
* 2229
* 2230
* 2233
* 2235

|

Other|

* IC 2082
* LEDA 89996

Partly in Mensa|

Large Magellenic Cloud

Galaxy clusters|

* NGC 1566 Group

Other|

* GRB 790305b

* v
* t
* e

The 88 modern constellations

* Andromeda
* Antlia
* Apus
* Aquarius
* Aquila
* Ara
* Aries
* Auriga
* Boötes
* Caelum
* Camelopardalis
* Cancer
* Canes Venatici
* Canis Major
* Canis Minor
* Capricornus
* Carina
* Cassiopeia
* Centaurus
* Cepheus
* Cetus
* Chamaeleon
* Circinus
* Columba
* Coma Berenices
* Corona Australis
* Corona Borealis
* Corvus
* Crater
* Crux
* Cygnus
* Delphinus
* Dorado
* Draco
* Equuleus
* Eridanus
* Fornax
* Gemini
* Grus
* Hercules
* Horologium
* Hydra
* Hydrus
* Indus
* Lacerta
* Leo
* Leo Minor
* Lepus
* Libra
* Lupus
* Lynx
* Lyra
* Mensa
* Microscopium
* Monoceros
* Musca
* Norma
* Octans
* Ophiuchus
* Orion
* Pavo
* Pegasus
* Perseus
* Phoenix
* Pictor
* Pisces
* Piscis Austrinus
* Puppis
* Pyxis
* Reticulum
* Sagitta
* Sagittarius
* Scorpius
* Sculptor
* Scutum
* Serpens
* Sextans
* Taurus
* Telescopium
* Triangulum
* Triangulum Australe
* Tucana
* Ursa Major
* Ursa Minor
* Vela
* Virgo
* Volans
* Vulpecula

* Astronomy:Lists of constellations

* v
* t
* e

Constellation history

* v
* t
* e

The 48 constellations listed by Ptolemy after 150 AD

* Andromeda
* Aquarius
* Aquila
* Ara
* Argo Navis
* Aries
* Auriga
* Boötes
* Cancer
* Canis Major
* Canis Minor
* Capricornus
* Cassiopeia
* Centaurus
* Cepheus
* Cetus
* Corona Australis
* Corona Borealis
* Corvus
* Crater
* Cygnus
* Delphinus
* Draco
* Equuleus
* Eridanus
* Gemini
* Hercules
* Hydra
* Leo
* Lepus
* Libra
* Lupus
* Lyra
* Ophiuchus
* Orion
* Pegasus
* Perseus
* Pisces
* Piscis Austrinus
* Sagitta
* Sagittarius
* Scorpius
* Serpens
* Taurus
* Triangulum
* Ursa Major
* Ursa Minor
* Virgo

* v
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* e

The 41 additional constellations added in the 16th and 17th centuries

* Vespucci or Corsalius early 16c: Crux
* Triangulum Australe
* Vopel 1536: Coma Berenices
* Keyser & de Houtman 1596: Apus
* Chamaeleon
* Dorado
* Grus
* Hydrus
* Indus
* Musca
* Pavo
* Phoenix
* Tucana
* Volans
* Plancius 1613: Camelopardalis
* Columba
* Monoceros
* Habrecht 1621: Reticulum
* Hevelius 1683: Canes Venatici
* Lacerta
* Leo Minor
* Lynx
* Scutum
* Sextans
* Vulpecula
* de Lacaille 1763: Antlia
* Caelum
* Carina
* Circinus
* Fornax
* Horologium
* Mensa
* Microscopium
* Norma
* Octans
* Pictor
* Puppis
* Pyxis
* Sculptor
* Telescopium
* Vela

* v
* t
* e

Obsolete constellations (including Ptolemy's Argo Navis)

* Anser
* Antinous
* Apes
* Argo Navis
* Asterion
* Cancer Minor
* Cerberus
* Chara
* Custos Messium
* Felis
* Frederici Honores/Gloria Frederici
* Gallus
* Globus Aerostaticus
* Jordanus
* Lilium
* Lochium Funis
* Machina Electrica
* Malus
* Mons Maenalus
* Musca Borealis
* Noctua
* Officina Typographica
* Polophylax
* Psalterium Georgianum/Harpa Georgii
* Quadrans Muralis
* Ramus Pomifer
* Robur Carolinum
* Sceptrum Brandenburgicum
* Sceptrum et Manus Iustitiae
* Solarium
* Rangifer/Tarandus
* Taurus Poniatovii
* Telescopium Herschelii
* Testudo
* Tigris
* Triangulum Minus
* Turdus Solitarius
* Vespa
* Vultur cadens
* Vultur volans

* obsolete constellation names

* Apis
* Phoenicopterus
* Serpentarius
* Xiphias

Coordinates:  05h 00m 00s, −65° 00′ 00″

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