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Tuesday 19 September 2017 - 21:13:28Posted by Bobby
Invention of Norma
Normalies in the Milky Way between Ara and Lupus. Introduced in the 18th centure by the French astronomer Nicolas Louis de Lacaille, it depicts a draftman's level or try square. It adjoins another Lacaille invention, Circinus, the compasses. There are no stars labeled or Beta Normae due to boundary changes since Lacaille's time.
Depiction: The Square
Highest in the Sky: June
Size Ranking: 74th
Coverage Area: 165 Sq. Degrees
Right Acension: 16 hours
Visibility: 35°N to 90°S
NGC 6067: Open cluster
NGC 6087: Open cluster
NGC 6164-65: Emission Nebula
SP-3: Planetary nebula
Best Viewed Objects/Stars
A double star, constisting of unrelated components that can be separated with the naked eye. The primary, Gamma-2, is the brightest star in the constellation; it is an orange giant star of magnitude 5.0, is an immensely luminous yellow supergiant more than 100 times farther away.
A double star, with components of magnitudes 4.5 and 6.7 that can be separated with a small telescope.
A double star. The components, of magnitudes 4.6 and 8.1, can be divided with a small telescope. Iota-2 is an unrelated 6th magnitude star that lies some distance away.