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Nearby stars catalogue

Arcturus

Star Arcturus

Red giant Arcturus is located 37 light years away from the Sun. It is a single star of spectral class K1.5IIIFe-0.5, that has 108 % of solar mass. For now, there are no known exoplanets in this star system.

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Nearby stars catalogue

Sun distance
37 light years

Arcturus

Red giant

Spectral class: K1.5IIIFe-0.5

Location +

Right ascension: 14h 15m 39.678s

Declination: 19° 10' 56.673'' (equatorial region)

Parallax: 88.830

Sun distance: 36.717 ly | 11.3 pc

Basic characteristic

Mass: 108 % M Sun

Size: 2540 % R Sun

Temperature: 4286 K | 0.74 T Sun

Age: 7.1 billions years | 1.54 Sun

Luminosity: 170 L Sun

Photometry

Apparent magnitude (V): -0.1

Absolute magnitude (V): -0.3

Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

K
2.1

H
1.6

J
1.2

Grp
0.8

I
0.8

G
0.6

V
0.5

Gbp
0.5

B
0.4

U
0.3

Arcturus system structure


	Arcturus

More about Arcturus

Nearby star Arcturus is is much bigger than the Sun and temperature on its surface is around 4286 K (4013 °C), which is about 74 % of Sun's temperature.

       Arcturus can be found in northern celestial hemisphere, and it is possible to see it with naked eye. The star is easily observable from Northern America, Europe and Asia.

Other designations of this star
* alf Boo, Alpha Boötis, Alramech, Abramech, α Boötis, 16 Boötis, BD+19°2777, GJ 541, Gliese 541, HD 124897, HIC 69673, HIP 69673, HR 5340, SAO 100944, LHS 48, GCTP 3242.00

External sources

Simbad database (* alf Boo)

Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the Arcturus system from the Sun?

The Arcturus system is 37 light years or 11.3 parsecs from the Sun.

What galaxy is the Arcturus star in?

The Arcturus is in the Milky Way galaxy just like the Sun.

How many stars are in the Arcturus system?

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

What type of star is the Arcturus?

The star Arcturus is a Red giant star.

What temperature is star Arcturus?

The star Arcturus has an effective temperature of 4286 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.

Closest stars

Eta Boötis	1.7 M☉	3.3 ly
EGGR 438	-	5.5 ly
DE Bootis	-	5.9 ly
Ross 52	-	6.4 ly
SDSS J1416+1348	0.07 M☉	7.2 ly

3D map of stellar neighborhood
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About Stellar Catalog

Working with real data

Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.

Estimated values

Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.

Fresh and validated

Stellar Catalog is continuously updated with new information from research papers. Stellar and planetary data are validated by automatic processes as well as humans.