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Rho Boötis
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Star Rho Boötis

Red giant Rho Boötis is located 160 light years away from the Sun. It is a single star of spectral class K4 III, that has 120 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
160 light years
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Rho Boötis

Red giant
Spectral class: K4 III

Location +

Ascension iconRight ascension: 14h 31m 49.790s
Declination iconDeclination: 30° 22' 17.178'' (northern hemisphere)
Parallax iconParallax: 20.370
Distance iconSun distance: 160.116 ly | 49.1 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: 120 % M Sun
| 1257 M Jupiter
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Star mass
Mass of the star Rho Boötis is 1.2 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: 2157 % R Sun
| 214.6 R Jupiter
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Star size
Radius of the star Rho Boötis is 21.57 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: 4298 K | 0.74 T Sun
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Star temperature
Surface temperature of Rho Boötis is 4298 K, which is 74 % 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: 10 billions years | 2.17 Sun
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Star age
Star Rho Boötis is 10 billion years old, which is about 2.17 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: 131.9 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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Rho Boötis system structure

 Rho Boötis

More about Rho Boötis

Star Rho Boötis is is much bigger than the Sun and temperature on its surface is around 4298 K (4025 °C), which is about 74 % of Sun's temperature.
       Rho Boötis can be found in northern celestial hemisphere.
Other designations of this star
ρ Boo, 25 Boötis, BD+31°2628, FK5 534, HD 127665, HIC 71053, HIP 71053, HR 5429, SAO 64202
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Frequently Asked Questions

How far is the Rho Boötis system from the Sun?

The Rho Boötis system is 160 light years or 49.1 parsecs from the Sun.

What galaxy is the Rho Boötis star in?

The Rho Boötis is in the Milky Way galaxy just like the Sun.

How many stars are in the Rho Boötis system?

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

What type of star is the Rho Boötis?

The star Rho Boötis is a Red giant star.

What temperature is star Rho Boötis?

The star Rho Boötis has an effective temperature of 4298 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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