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WISE J0722-0540
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Star WISE J0722-0540

Brown dwarf WISE J0722-0540 is located 13 light years away from the Sun. It is a single star of spectral class T9, that has 2 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
13 light years
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WISE J0722-0540

Brown dwarf
Spectral class: T9

Location +

Ascension iconRight ascension: 7h 22m 27.000s
Declination iconDeclination: -5° 40' 31.210'' (equatorial region)
Parallax iconParallax: 246.000
Distance iconSun distance: 13.258 ly | 4.1 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: 1.7 % M Sun
| 18 M Jupiter
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Star mass
Mass of the star WISE J0722-0540 is 0.017 solar masses (or 17.8 Jupiter 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: 9.8 % R Sun
| 1 R Jupiter
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Star size
Radius of the star WISE J0722-0540 is 0.098 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: 510 K | 0.09 T Sun
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Star temperature
Surface temperature of WISE J0722-0540 is 510 K, which is 9 % 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: 2.5 billions years | 0.54 Sun
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Star age
Star WISE J0722-0540 is 2.5 billion years old, which is about 0.54 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

Photometry

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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WISE J0722-0540 system structure

 WISE J0722-0540

More about WISE J0722-0540

Nearby brown dwarf WISE J0722-0540 is is is much smaller than the Sun and temperature on its surface is around 510 K (237 °C), which is about 9 % of Sun's temperature.
       WISE J0722-0540 can be found in southern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
WISEPA J072227.27−054029.9, UGPS 0722−05, UGPS J072227.51-054031.2
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External sources
simbad icon
Simbad database (UGPS J072227.51-054031.2)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the WISE J0722-0540 system from the Sun?

The WISE J0722-0540 system is 13 light years or 4.1 parsecs from the Sun.

What galaxy is the WISE J0722-0540 star in?

The WISE J0722-0540 is in the Milky Way galaxy just like the Sun.

How many stars are in the WISE J0722-0540 system?

The WISE J0722-0540 is a single star, there are no other known stars in the system.

What type of star is the WISE J0722-0540?

The star WISE J0722-0540 is a Brown dwarf star.

What temperature is star WISE J0722-0540?

The star WISE J0722-0540 has an effective temperature of 510 K. Find out more about the temperature of stars in Stellar guide
Class of stars Brown dwarf
Brown dwarfs are not really stars, because there is no thermonuclear fusion in their core. These objects are smaller and cooler than stars, but too massive to be considered planets
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