Telescopium constellation lies in the southern sky, south of the constellations Sagittarius and Corona Australis. As the name indicates, Telescopum represents the telescope and was was created by the French astronomer Nicolas Louis de Lacaille in the 18th century. Lacaille named it after a type of telescope in honour of its invention. Telescopium is a minor constellation in the southern celestial hemisphere, which was reduced in size by Francis Baily and Benjamin Gould after its discovery.

The constellation is a relatively faint one, with no stars brighter than fourth magnitude. It also has relatively few notable deep sky objects, and is home to the Telescopium Group, a group consisting of about 12 galaxies.

Telescopium is the 57th largest constellation in size, occupying an area of 252 square degrees. Telescopium does not have any stars with confirmed planets nor does it contain any Messier objects. The brightest star in the constellation is Alpha Telescopii, with an apparent magnitude of 3.49. There are no meteor showers associated with the constellation. Nor are there any named stars. The whole constellation is visible to observers south of latitude 33°N.

Applicable Information
Visibility In Pacific NorthwestNot visible in the Pacific Northwest
Best Times To ViewNot visible in the Pacific Northwest
Right Ascension19h
Area252 square degrees
Main Stars2
Brightest Objectα Tel
Meteor showers0
Messier objects0
Neighboring ConstellationsAra, Corona Australis, Indus, Microscopium, Pavo, Sagittarius


Within the constellation’s borders, there are 57 stars brighter than or equal to apparent magnitude 6.5.

The globular cluster NGC 6584 lies near Theta Arae and is 45,000 light-years distant from Earth.

The Telescopium group is group of twelve galaxies spanning three degrees in the northeastern part of the constellation, lying around 37 megaparsecs, or 120 million light-years, from our own galaxy. The brightest member is the elliptical galaxy NGC 6868, and to the west lies the either spiral or lenticular galaxy NGC 6861. These are the brightest members of two respective subgroups within the galaxy group, and are heading toward a merger in the future.

Make sure to check out other articles on the site, including a brief introduction to constellations, other constellation articles, and more!

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