Psi Ophiuchi
Psi Ophiuchi, which is Latinized from ψ Ophiuchi, is a single star in the equatorial constellation of Ophiuchus, located next to the western constellation border with Scorpius. It has an orange hue and is visible to the naked eye as a faint point of light with an apparent visual magnitude of 4.50. The distance to this object is approximately 199 light years based on parallax.

This is an aging giant or bright giant star with a stellar classification of K0- II-III, which indicates it has exhausted the supply of hydrogen at its core then cooled and expanded. At present it has 11 times the girth of the Sun, while having 1.6 times the Sun's mass. It is a red clump giant, meaning it is on the horizontal branch and is generating energy through core helium fusion. The star is radiating 66 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,864 K.
Q466126
Latinized
ORG
Q523
star
Concept
Q187646
equatorial
Concept
Q8928
constellation
Concept
Q8906
Ophiuchus
CEL
Q8865
Scorpius
CEL
Q124313
apparent visual magnitude
Concept
Q906561
parallax
Concept
Q5875
giant
Concept
Q5881
bright giant
Concept
Q25377588
stellar classification
Concept
Q60790215
core
Concept
Q48440
girth of the Sun
Concept
Q180892
Sun's mass
Concept
Q1358411
red clump
Concept
Q50076
horizontal branch
Concept
Q60790215
core
Concept
Q336225
helium fusion
Concept
Q843877
luminosity of the Sun
Concept
Q6372
photosphere
Concept
Q854050
effective temperature
Concept
Q5176334
Psi Ophiuchi
CEL
+4.50^^http://www.w3.org/2001/XMLSchema#decimal
4.50
NUMBER
0^^http://www.w3.org/2001/XMLSchema#decimal
0
NUMBER
+11^^http://www.w3.org/2001/XMLSchema#decimal
11
NUMBER
+1.6^^http://www.w3.org/2001/XMLSchema#decimal
1.6
NUMBER
+66^^http://www.w3.org/2001/XMLSchema#decimal
66
NUMBER
instance of
constellation
apparent magnitude
instance of
instance of
subclass of