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111 Tauri
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Star 111 Tauri

Binary star 111 Tauri is located 48 light years away from the Sun. It consists of a yellow-white star and a orange star. For now, there are no known exoplanets in this star system.
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Sun distance
48 light years
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111 Tauri A

Yellow-White star, BY Draconis variable
Spectral class: F8V

Location +

Ascension iconRight ascension: 5h 24m 25.747s
Declination iconDeclination: 17° 23' 0.612'' (equatorial region)
Parallax iconParallax: 68.591
Distance iconSun distance: 47.551 ly | 14.6 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: 108 % M Sun
| 1131 M Jupiter
+
Star mass
Mass of the star 111 Tauri A is 1.08 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: 167 % R Sun
| 16.6 R Jupiter
+
Star size
Radius of the star 111 Tauri A is 1.67 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: 6015 K | 1.04 T Sun
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Star temperature
Surface temperature of 111 Tauri A is 6015 K, which is 104 % 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: 0.04 billions years | 0.01 Sun
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Star age
Star 111 Tauri A is 0.04 billion years old, which is about 0.01 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: 1.845 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

Photometry

Magnitude iconApparent magnitude (V): 5.1
Magnitude iconAbsolute magnitude (V): 4.3
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
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

111 Tauri B

Orange star, High proper motion star
Spectral class: K4V

Basic characteristic

icon weight
Mass: 70 % M Sun
| 775.2 M Jupiter
 (estimate)
+
Star mass
The mass of the star 111 Tauri B is unknown. Based on its other characteristics, it is estimated to be about 70 % of the Sun's mass.

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: 70 % R Sun
| 7.1 R Jupiter
(estimate)
+
Star size
Radius of the star 111 Tauri B is not known. Its estimated value based on other similar stars is about 70 % 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 iconTemperature: 4700 K
 (estimate)
+
Star temperature
Surface temperature of 111 Tauri B is estimated to be 4660 K, which is 81 % 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

Photometry

Magnitude iconApparent magnitude (V): 7.9
Magnitude iconAbsolute magnitude (V): 7.1
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
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
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111 Tauri system structure

 111 Tauri A
111 Tauri B

More about 111 Tauri

      a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface. 111 Tauri 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. 

      111 Tauri is a BY Draconis variable. Stars from this category exhibit periodic variations in their luminosity. The variability is caused by a rotation which shows and hides starspots on the surface.
Other designations of this star
111 Tau, Gl 202, Gliese 202, HR 1780, BD+17° 920, HD 35296, LTT 11642, SAO 94526, HIC 25278, HIP 25278, Gaia EDR3 3400292798990117888
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External sources
simbad icon
Simbad database (* 111 Tau B)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 3394298532176344960)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 111 Tauri system from the Sun?

The 111 Tauri system is 48 light years or 14.6 parsecs from the Sun.

What galaxy is the 111 Tauri star in?

The 111 Tauri is in the Milky Way galaxy just like the Sun.

How many stars are in the 111 Tauri system?

The 111 Tauri system contains 2 stars.

What type of star is the 111 Tauri?

The primary in the 111 Tauri system is a Yellow-White star star.

What temperature is star 111 Tauri?

The primary in the 111 Tauri system has a temperature of 6015 K. Find out more about the temperature of stars in Stellar guide
Closest stars

 m Tauri
 - 5.7 ly

LSPM J0501+2237
 - 6.2 ly

2MASS J0521+1720
 - 6.8 ly

Ross 42
 - 8 ly

LSR J0556+1144
 - 8.1 ly
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