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WISEP J213456.73-713743.6
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Star WISEP J213456.73-713743.6

Brown dwarf WISEP J213456.73-713743.6 is located 30 light years away from the Sun. It is a single star of spectral class T9pec , that has typically about 3 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
30 light years
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WISEP J213456.73-713743.6

Brown dwarf
Spectral class: T9pec

Location +

Ascension iconRight ascension: 21h 34m 56.746s
Declination iconDeclination: -71° 37' 44.580'' (southern hemisphere)
Parallax iconParallax: 109.100
Distance iconSun distance: 29.895 ly | 9.2 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: 2 % M Sun
| 21 M Jupiter
 (estimate)
+
Star mass
The estimated mass of the star WISEP J213456.73-713743.6 is about 2 % of the Sun's mass, or approximately 21 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: 10 % R Sun
| 0.6 R Jupiter
(estimate)
+
Star size
Radius of the star WISEP J213456.73-713743.6 is not known. Its estimated value based on other similar stars is about 10 % 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: 500 K
 (estimate)
+
Star temperature
Surface temperature of WISEP J213456.73-713743.6 is estimated to be 512 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

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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WISEP J213456.73-713743.6 system structure

 WISEP J213456.73-713743.6

More about WISEP J213456.73-713743.6

       WISEP J213456.73-713743.6 can be found in southern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
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External sources
simbad icon
Simbad database (WISEP J213456.73-713743.6)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the WISEP J213456.73-713743.6 system from the Sun?

The WISEP J213456.73-713743.6 system is 30 light years or 9.2 parsecs from the Sun.

What galaxy is the WISEP J213456.73-713743.6 star in?

The WISEP J213456.73-713743.6 is in the Milky Way galaxy just like the Sun.

How many stars are in the WISEP J213456.73-713743.6 system?

The WISEP J213456.73-713743.6 is a single star, there are no other known stars in the system.

What type of star is the WISEP J213456.73-713743.6?

The star WISEP J213456.73-713743.6 is a Brown dwarf star.

What temperature is the WISEP J213456.73-713743.6?

The primary in the WISEP J213456.73-713743.6 system has an effective temperature of K ( °C). 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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stellar brief logoStellar Brief

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27. 10. 2026
stellar brief logo
A giant planet candidate near Boyajian’s star may look oversized because a broad ring system surrounds it, not because the planet itself is unusually large. New atmospheric models also show why methane and carbon monoxide can vary across hot gas giants, exposing major limits in simpler predictions.
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