Rho Ophiuchi
Encyclopedia
Rho Ophiuchi (ρ Ophiuchi) is a binary star system in the constellation
Ophiuchus
. It consists of a blue subgiant and a blue dwarf, both of which are of class
B. Due to its location in the vicinity of the Rho Ophiuchi cloud complex
, its magnitude
has been dimmed
down by 2 magnitudes. The star is located about 390 to 400 light years
away.
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....
Ophiuchus
Ophiuchus
Ophiuchus is a large constellation located around the celestial equator. Its name is from the Greek "serpent-bearer", and it is commonly represented as a man grasping the snake that is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by the 2nd-century...
. It consists of a blue subgiant and a blue dwarf, both of which are of class
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
B. Due to its location in the vicinity of the Rho Ophiuchi cloud complex
Rho Ophiuchi cloud complex
The Rho Ophiuchi cloud complex is a dark nebula of gas and dust that is located 1° south of the star ρ Ophiuchi of the constellation Ophiuchus. At an estimated distance of , this cloud is one of the closest star-forming regions to the Solar System....
, its magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
has been dimmed
Extinction (astronomy)
Extinction is a term used in astronomy to describe the absorption and scattering of electromagnetic radiation by matter between an emitting astronomical object and the observer. Interstellar extinction—also called Galactic extinction, when it occurs in the Milky Way—was first...
down by 2 magnitudes. The star is located about 390 to 400 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
away.