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WISE J1517+0529
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Star WISE J1517+0529

WISE J151721.13+052929.3, also known as WISE J1517+0529, is a T8 brown dwarf about 68 light-years from the Sun. It rotates rapidly and produces periodic radio bursts. No mass, radius or temperature is provided here.
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Sun distance
68 light years
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WISE J1517+0529

Brown dwarf
Spectral class: sdT8p

Location +

Ascension iconRight ascension: 15h 17m 21.123s
Declination iconDeclination: 5° 29' 29.029'' (equatorial region)
Parallax iconParallax: 47.900
Distance iconSun distance: 68.091 ly | 20.9 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: 4 % M Sun
| 41.9 M Jupiter
 (estimate)
+
Star mass
The estimated mass of the star WISE J1517+0529 is about 4 % of the Sun's mass, or approximately 41.9 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
| 0.9 R Jupiter
(estimate)
+
Star size
Radius of the star WISE J1517+0529 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: 700 K
 (estimate)
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Star temperature
Surface temperature of WISE J1517+0529 is estimated to be 686 K, which is 12 % 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
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WISE J1517+0529 system structure

 WISE J1517+0529

More about WISE J1517+0529

       WISE J1517+0529 can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
WISE J151721.13+052929.3
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External sources
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Frequently Asked Questions

How far is the WISE J1517+0529 system from the Sun?

The WISE J1517+0529 system is 68 light years or 20.9 parsecs from the Sun.

What galaxy is the WISE J1517+0529 star in?

The WISE J1517+0529 is in the Milky Way galaxy just like the Sun.

How many stars are in the WISE J1517+0529 system?

The WISE J1517+0529 is a single star, there are no other known stars in the system.

What type of star is the WISE J1517+0529?

The star WISE J1517+0529 is a Brown dwarf star.

What temperature is the WISE J1517+0529?

The primary in the WISE J1517+0529 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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28. 10. 2026
stellar brief logo
WISE J1517+05 flashes powerful radio bursts every 1.149 hours, making it one of the fastest-spinning ultracool dwarfs detected in radio waves. The latest reports also explore how transit changes can reveal a hidden planet in Kepler-88 and map a possible hotspot on WD 1202-024 B. Other findings track helium in V1298 Tau b’s atmosphere and a warped dust ring around CQ Tau.
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