[Pic]

Abbreviation:

Tri

English name:

Triangle

Coordinates

see Stellar data

Particulars:

• Double stars epsilon Tri, iota Tri
• Variable star R Tri
• Spiral galaxy M 33
• Meteor Shower: Aries-Triangulids

General:

Located at the south-east edge of Andromeda this litte constellation shows a distinctive shape. Its a member of the Perseus constellation family.

Stars and other objects

The double iota Tri (a 1697) is an attractive pair; the two stars of 5th and 7th mag are glowing in a blue-golden light. They can be separated in small scopes (two inch should be sufficient) when a high magnification is used.
The spiral galaxy M33 is a member of our Local Group of galaxies. After our own galaxy and the Andromeda Galaxy, M31 it is the third largest in the Local Group. Before trying to locate fainter objects, viewing M33 is a good test. Because it is so faint against the background sky looking with binoculars is best in a very dark night. For detailed informations see the Messier database.
The variable stars R Tri is a red giant (spectraltype M4IIIe) of 5.30 mag.
The meteor shower Aries-Triangulids was discovered 1993 by G.Kronk and K.Sleeter in Illinois and independetly by G.W. Gliba in Greenbelt (Maryland). It is active around September 11th, 12th.