Constellation in the northern celestial hemisphere
For other uses, see Triangulum (disambiguation).
Triangulum
Constellation
List of stars in Triangulum
Abbreviation
Tri
Genitive
Trianguli
Pronunciation
/traɪˈæŋɡjʊləm/, genitive /traɪˈæŋɡjʊlaɪ/
Symbolism
The Triangle
Right ascension
01h 31.3m to 02h 50.4m[1]
Declination
25.60° to 37.35°[1]
Quadrant
NQ1
Area
132 sq. deg. (78th)
Main stars
3
Bayer/Flamsteed stars
14
Stars with planets
3
Stars brighter than 3.00m
0
Stars within 10.00 pc (32.62 ly)
0
Brightest star
β Tri (3.00m)
Messier objects
1
Bordering constellations
Andromeda Pisces Aries Perseus
Visible at latitudes between +90° and −60°. Best visible at 21:00 (9 p.m.) during the month of December.
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Triangulum is a small constellation in the northern sky. Its name is Latin for "triangle", derived from its three brightest stars, which form a long and narrow triangle. Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy. The celestial cartographers Johann Bayer and John Flamsteed catalogued the constellation's stars, giving six of them Bayer designations.
The white stars Beta and Gamma Trianguli, of apparent magnitudes 3.00 and 4.00, respectively, form the base of the triangle and the yellow-white Alpha Trianguli, of magnitude 3.41, the apex. Iota Trianguli is a notable double star system, and there are three star systems with known planets located in Triangulum. The constellation contains several galaxies, the brightest and nearest of which is the Triangulum Galaxy or Messier 33—a member of the Local Group. The first quasar ever observed, 3C 48, also lies within the boundaries of Triangulum.
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question marks, boxes, or other symbols instead of cuneiform script. Triangulum is a small constellation in the northern sky. Its name is Latin for "triangle"...
The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC...
Lampropeltis triangulumtriangulum, commonly known as the eastern milk snake or eastern milksnake, is a subspecies of the milk snake (Lampropeltis triangulum). The...
The milk snake or milksnake (Lampropeltis triangulum), is a species of kingsnake; 24 subspecies are currently recognized. Lampropeltis elapsoides, the...
wrongly written as Triangulum Minor. It was formed from the southern parts of his Triangula (plural form of Triangulum), alongside Triangulum Majus, but is...
Triangulum Australe is a small constellation in the far Southern Celestial Hemisphere. Its name is Latin for "the southern triangle", which distinguishes...
"Analysis of sympatric populations of Lampropeltis triangulum syspila and Lampropeltis triangulum elapsoides, in western Kentucky and adjacent Tennessee...
Netechma triangulum is a species of moth of the family Tortricidae. It is endemic to Ecuador (Morona-Santiago Province). The wingspan is 22 millimetres...
The European beewolf (Philanthus triangulum), also known as the bee-killer wasp or the bee-eating philanthus (from the now obsolete synonym Philanthus...
Lampropeltis triangulum syspila, commonly known as the red milk snake or red milksnake, is a subspecies of the milk snake (Lampropeltis triangulum). The nonvenomous...
Eumorpha triangulum is a moth of the family Sphingidae. It is found throughout Latin America; namely Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa...
Lampropeltis triangulum sinaloae, commonly known as the Sinaloan milk snake, is an egg-laying subspecies of nonvenomous colubrid snake. It is one of the...
Lampropeltis triangulum hondurensis, commonly known as the Honduran milk snake, is an egg-laying subspecies of nonvenomous colubrid snake. It is one of...
Lampropeltis triangulum campbelli, commonly known as the Pueblan milk snake or Campbell's milk snake, is an egg-laying subspecies of non-venomous colubrid...
Lampropeltis triangulum gaigeae, commonly known as the black milk snake, is a non-venomous subspecies of milk snake. It is the largest known milk snake...
Nemadus triangulum is a species in the family Leiodidae ("round fungus beetles"), in the order Coleoptera ("beetles"). It is found in North America. "Nemadus...
Lampropeltis micropholis, commonly known as the Ecuadorian milk snake, is a species of milk snake. It is found in Colombia, Costa Rica, Ecuador, Panama...
NGC 604 is an H II region inside the Triangulum Galaxy. It was discovered by William Herschel on September 11, 1784. It is among the largest H II regions...
Deltoton Delta (obsolete name for Triangulum Boreale) 1540 Petrus Apianus Mothallah, β and γ Trianguli Triangulum Dentalium /dɛnˈteɪliəm/ Dentalii Tooth...
USS Triangulum (AK-102) was a Crater-class cargo ship commissioned by the US Navy for service in World War II. Triangulum was named after the constellation...
Hyperaspis triangulum, the triad lady beetle, is a species of lady beetle in the family Coccinellidae. It is found in North America. "Hyperaspis triangulum Report"...
This is a list of notable stars in the constellation Triangulum, sorted by decreasing brightness. List of stars by constellation ESA (1997). "The Hipparcos...
Acarodynerus triangulum is a species of wasp in the family Vespidae. It was described by Saussure in 1855. Acarodynerus triangulum at www.biolib.cz. v...
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