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 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.
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.
|Is a Zodiac Sign||No|
|Brightest Star||Beta Trianguli|
|Area||131.847 sq. deg.|
|Percentage of Night Sky||0.32%|
|Site Exoplanet Count||3|
|Meteor Shower Count||6|
|Nearest Star||Delta Trianguli|
|Nearest Star with Exoplanet(s)||HD 9446|
|Dimmest Star||HD 10348|
|Furthest Star||HIP 13148|
|Bright Star Count||18|
|Hipparcos Star Count||322|
|Main Star Count||3|
|Messier Deep Space Object Count||1|
|*Non-Messier Deep Space Object Count||0|
|Bordering / Neighbouring / Surrounding Constellations||Andromeda|
*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.
The map was generated using Night Vision, an awesome free application by Brian Simpson.
|Star||Distance (Lt. Yrs.)||Exoplanet Count||Declination||Right Ascension|
|HD 13189||1832.38||1||+32d 18` 59.1||02h 09m 40.17|
|HD 9446||170.77||2||+29d 15` 55.0||01h 33m 20.06|
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.
|Star||Distance (Lt. Yrs.)||Declination||Right Ascension|
|10 Trianguli||376.63||+28d 38` 33.6||02h 18m 56.99|
|11 Trianguli||278.06||+31d 48` 04.9||02h 27m 27.79|
|12 Trianguli||162.51||+29d 40` 10.3||02h 28m 09.99|
|13 Trianguli||102.44||+29d 55` 53.7||02h 28m 48.54|
|14 Trianguli||433.15||+36d 08` 50.0||02h 32m 06.14|
|15 Trianguli||632.10||+34d 41` 15.7||02h 35m 46.80|
|5 Trianguli||352.99||+31d 31` 35.1||02h 11m 25.00|
|7 Trianguli||280.69||+33d 21` 32.3||02h 15m 56.30|
|Beta Trianguli||126.86||+34d 59` 14.6||02h 09m 32.52|
|Caput Trianguli||63.33||+29d 34` 45.8||01h 53m 04.90|
|Delta Trianguli||35.17||+34d 13` 29.4||02h 17m 02.42|
|Epsilon Trianguli||391.55||+33d 17` 02.9||02h 02m 57.97|
|Gamma Trianguli||112.32||+33d 50` 50.4||02h 17m 18.84|
|Iota Trianguli||290.70||+30d 18` 11.6||02h 12m 22.32|
|R Trianguli||959.30||+34d 15` 51.4||02h 37m 02.32|
|X Trianguli||458.09||+27d 53` 19.3||02h 00m 33.72|
|The Triangulum Galaxy||Spiral Galaxy||2.380-3.070||+30:39||01h 33m 9|
|K||Light Orange Star 3,700 - 5,200k||96|
|G||Yellow 5,200 - 6,000k||72|
|F||Yellow-White 6,000 - 7,500k||70|
|A||White 7,500 - 10,000k||50|
|M||Red Dwarf Star <3,700k||18|
|B||Blue-White 10,500 - 30,000k||8|
|Ib||Less Luminous Supergiant||1|