S Normae
Encyclopedia
S Normae is a variable star
in the constellation
Norma
. It is the brightest member of the open cluster
NGC 6087
.
Variable star
A star is classified as variable if its apparent magnitude as seen from Earth changes over time, whether the changes are due to variations in the star's actual luminosity, or to variations in the amount of the star's light that is blocked from reaching Earth...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Norma
Norma (constellation)
Norma is a small and inconspicuous constellation in the southern hemisphere between Scorpius and Centaurus. Its name is Latin for normal, referring to a right angle, and is variously considered to represent a rule, a carpenter's square, a set square or a level....
. It is the brightest member of the open cluster
Open cluster
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist...
NGC 6087
NGC 6087
NGC 6087 is one of the brightest open clusters in the constellation Norma with a magnitude of 5.4. It is approximately 3500 light-years away and contains about 40 stars of the seventh to the eleventh magnitude, the brightest being 6.5 magnitude S Normae....
.