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Nu Ophiuchi
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Star Nu Ophiuchi

Red giant Nu Ophiuchi is located 151 light years away from the Sun. It is a single star of spectral class K0 IIIa CN –1, that has 304 % of solar mass. There are multiple known exoplanets in this system.
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Sun distance
151 light years
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Nu Ophiuchi

Red giant
Spectral class: K0 IIIa CN –1

Location +

Ascension iconRight ascension: 17h 59m 1.592s
Declination iconDeclination: -9° 46' 25.080'' (equatorial region)
Parallax iconParallax: 21.640
Distance iconSun distance: 150.719 ly | 46.2 pc
Star position
The position of a star tells us where it appears in the sky, similar to how we use coordinates like latitude and longitude on Earth. In astronomy, the three main coordinates are right ascension, declination and distance. .. icon More about Star position in StellarGuide

Basic characteristic

icon weight
Mass: 304 % M Sun
| 3185 M Jupiter
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Star mass
Mass of the star Nu Ophiuchi is 3.04 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 1400 % R Sun
| 139.3 R Jupiter
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Star size
Radius of the star Nu Ophiuchi is 14 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 4928 K | 0.85 T Sun
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Star temperature
Surface temperature of Nu Ophiuchi is 4928 K, which is 85 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
time icon
Age: 0.33 billions years | 0.07 Sun
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Star age
Star Nu Ophiuchi is 0.33 billion years old, which is about 0.07 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide
luminosity icon
Luminosity: 123 L Sun
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Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide
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Nu Ophiuchi system structure

 Nu Ophiuchi
Nu Ophiuchi b 1.8 AU 15895.4 M⊕ 530.7 days
Nu Ophiuchi c 6.02 AU 60 M⊕ 3189 days

More about Nu Ophiuchi

Star Nu Ophiuchi is is approximately 14 times bigger than the Sun and temperature on its surface is around 4928 K (4655 °C), which is about 85 % of Sun's temperature.
       Nu Ophiuchi can be found in southern celestial hemisphere.
Other designations of this star
Sinistra, 64 Ophiuchi, BD–09 4632, FK5 673, HD 163917, HIC 88048, HIP 88048, HR 6698, SAO 142004, 2MASS J17590160-0946249
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Frequently Asked Questions

How far is the Nu Ophiuchi system from the Sun?

The Nu Ophiuchi system is 151 light years or 46.2 parsecs from the Sun.

What galaxy is the Nu Ophiuchi star in?

The Nu Ophiuchi is in the Milky Way galaxy just like the Sun.

How many stars are in the Nu Ophiuchi system?

The Nu Ophiuchi is a single star, there are no other known stars in the system.

What type of star is the Nu Ophiuchi?

The star Nu Ophiuchi is a Red giant star.

What temperature is star Nu Ophiuchi?

The star Nu Ophiuchi has an effective temperature of 4928 K. Find out more about the temperature of stars in Stellar guide
Class of stars Red giant
White dwarfs are the hot, extremely dense stellar remnants left behind by stars that originally had masses between about 0.5 and 8 times the mass of the Sun during their main sequence lifetimes. After exhausting their nuclear fuel, these stars shed their outer layers and leave behind a compact core. Although white dwarfs contain between roughly 0.2 and 1.44 solar masses, this mass is packed into a volume comparable to that of an Earth-sized planet, making them some of the densest objects in the Universe.
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