Theta Cassiopeiae is a star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on 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....

 Cassiopeia

Cassiopeia (constellation)

Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopea was one of the 48 constellations listed by the 2nd century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today...

. It has the traditional name Marfark or Marfak, which it shares with μ Cassiopeiae, and the name was from Al Marfik or Al Mirfaq (المرفق), meaning "the elbow".

In Chinese

Chinese language

The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the branches of Sino-Tibetan family of languages...

, , meaning Flying Corridor

Legs (Chinese constellation)

The Legs mansion is one of the Twenty-eight mansions of the Chinese constellations. It is one of the western mansions of the White Tiger.-Asterisms:...

, refers to an asterism consisting of θ Cassiopeiae, ι Cassiopeiae

Iota Cassiopeiae

Iota Cassiopeiae is a star system in the constellation Cassiopeia. It is approximately 141.6 light years from Earth....

, ε Cassiopeiae

Epsilon Cassiopeiae

Epsilon Cassiopeiae is a star system in the constellation Cassiopeia. It has the traditional name Segin....

, δ Cassiopeiae

Delta Cassiopeiae

Delta Cassiopeiae is a star in the constellation Cassiopeia. It has the traditional names Ksora and Ruchbah, derived from the Arabic word ركبة rukbah meaning "knee"...

, ν Cassiopeiae

Nu Cassiopeiae

Nu Cassiopeiae is a star in the constellation Cassiopeia. ν Cassiopeiae is a blue-white B-type giant with an apparent magnitude of +4.90. It is approximately 390 light years from Earth....

 and ο Cassiopeiae

Omicron Cassiopeiae

Omicron Cassiopeiae is a triple star system in the constellation Cassiopeia. It is approximately 910 light years from Earth....

. Consequently, θ Cassiopeiae itself is known as

θ Cassiopeiae is a white A-type

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...

 main sequence dwarf

Main sequence

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...

 with an apparent 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...

 of +4.34. It is approximately 137 light years from Earth

Earth

Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

.