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Triangulum Constellation

Triangulum (Pronounciation:Try-ang-u-lum, Abbrev:Tri, Latin:Trianguli) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Triangulum takes up 131.847 sq. degrees of the night sky which equates to 0.32% of the night sky. The constellation gets its name as it name means The Triangle . The constellation is one of the original constellations that was devised by the Ancient Greco-Egyptian astronomer Ptolemy who lived between 90 A.D. and 168 A.D.

Triangulum is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Triangulum is a southern hemispheric constellation which means it can't be seen easily or at all from the northern hemisphere.

The brightest star in Triangulum is Beta Trianguli. There are 3 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site.

Triangulum Star and Deep Space Object Count

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Triangulum is 322. The number of stars that are of magnitude 6.0 or lower in the constellation is 18. The number of stars in the constellation that make up the outline is 3.

There are 1 deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.

Stars of Interest

The nearest star to Earth is Delta Trianguli which is roughly about 35.17 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 9446 which is about 170.77 Light Years. The furthest star that can be located in the constellation is HIP 13148 which is located about 32616.33 Light Years away from the Sun.

The dimmest star that can be seen in Triangulum with the naked eye is HD 10348. The dim star has an apparent magnitude of 5.97. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

Triangulum was previously referred to as Sicilia after the Island of Sicily. Ceres, the Goddess of the Island persuaded Zeus to put the Island in the skies.

There are no major meteor showers that radiate from within this constellation.

Triangulum Facts

Is a Zodiac Sign No
Brightest StarBeta Trianguli
Area131.847 sq. deg.
Percentage of Night Sky0.32%
Size Position78th
Hemisphere Southern
Site Exoplanet Count3
Meteor Shower Count6
Nearest StarDelta Trianguli
Nearest Star with Exoplanet(s)HD 9446
Dimmest StarHD 10348
Furthest StarHIP 13148
Bright Star Count18
Hipparcos Star Count322
Main Star Count3
Messier Deep Space Object Count1
*Non-Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsAndromeda

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

Triangulum Constellation Map

Triangulum Constellation Star Map

The map was generated using Night Vision, an awesome free application by Brian Simpson.

List of Stars with Exoplanets in Triangulum

StarDistance (Lt. Yrs.)Exoplanet CountDeclinationRight Ascension
HD 131891832.381+32d 18` 59.102h 09m 40.17
HD 9446170.772+29d 15` 55.001h 33m 20.06

List of Named Stars in Triangulum without Extrasolar Planets

As there's so many stars in the cosmos, not all the stars are listed here. The site has lots of stars not listed so if your star isn't listed and you know the Henry Draper or Hipparcos ID, type https://www.universeguide.com/star/ then followed by the HIPNNNNNN or HDNNNN where NNNNN is the number part of the name. The stars that I do list have either a traditional name, a bayer or other classification name.

StarDistance (Lt. Yrs.)DeclinationRight Ascension
10 Trianguli376.63 +28d 38` 33.602h 18m 56.99
11 Trianguli278.06+31d 48` 04.902h 27m 27.79
12 Trianguli162.51+29d 40` 10.302h 28m 09.99
13 Trianguli102.44+29d 55` 53.702h 28m 48.54
14 Trianguli433.15+36d 08` 50.002h 32m 06.14
15 Trianguli632.10+34d 41` 15.702h 35m 46.80
5 Trianguli352.99+31d 31` 35.102h 11m 25.00
7 Trianguli280.69+33d 21` 32.302h 15m 56.30
Beta Trianguli126.86+34d 59` 14.602h 09m 32.52
Caput Trianguli63.33+29d 34` 45.801h 53m 04.90
Delta Trianguli35.17+34d 13` 29.402h 17m 02.42
Epsilon Trianguli391.55+33d 17` 02.902h 02m 57.97
Gamma Trianguli112.32+33d 50` 50.402h 17m 18.84
Iota Trianguli290.70+30d 18` 11.602h 12m 22.32
R Trianguli959.30+34d 15` 51.402h 37m 02.32
X Trianguli458.09+27d 53` 19.302h 00m 33.72

Objects of Interest (Galaxies, Nebulas, Supernovas, etc) in Triangulum

NameTypeDistanceDeclinationRight Ascension
The Triangulum GalaxySpiral Galaxy2.380-3.070+30:3901h 33m 9

Triangulum Constellation's Star Breakdown

Type Breakdown

KLight Orange Star 3,700 - 5,200k96
GYellow 5,200 - 6,000k72
FYellow-White 6,000 - 7,500k70
AWhite 7,500 - 10,000k50
MRed Dwarf Star <3,700k18
BBlue-White 10,500 - 30,000k8

Size Breakdown

IIINormal Giant42
VMain Sequence26
IIBright Giant4
IbLess Luminous Supergiant1

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