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WISE 1639-6847
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Star WISE 1639-6847

Sub-brown dwarf WISE 1639-6847 is located 16 light years away from the Sun. It is a single star of spectral class Y0pec, that has typically about 1.5 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
16 light years
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WISE 1639-6847

Sub-brown dwarf
Spectral class: Y0pec

Location +

Ascension iconRight ascension: 16h 39m 40.830s
Declination iconDeclination: -68° 47' 38.600'' (southern hemisphere)
Parallax iconParallax: 202.300
Distance iconSun distance: 16.122 ly | 4.9 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: 1 % M Sun
| 10.5 M Jupiter
 (estimate)
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Star mass
The estimated mass of the star WISE 1639-6847 is about 1 % of the Sun's mass, or approximately 10.5 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
| 1 R Jupiter
(estimate)
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Star size
Radius of the star WISE 1639-6847 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 icon
Temperature: 412 K | 0.07 T Sun
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Star temperature
Surface temperature of WISE 1639-6847 is 412 K, which is 7 % 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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WISE 1639-6847 system structure

 WISE 1639-6847

More about WISE 1639-6847

and temperature on its surface is around 412 K (139 °C), which is about 7 % of Sun's temperature.
       WISE 1639-6847 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
WISE J163940.83−684738.6, W1639, GJ 12393, Gliese 12393, WISEPC J163940.83-684738.6
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External sources
simbad icon
Simbad database (WISE J163940.83-684738.6)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)

Frequently Asked Questions

How far is the WISE 1639-6847 system from the Sun?

The WISE 1639-6847 system is 16 light years or 4.9 parsecs from the Sun.

What galaxy is the WISE 1639-6847 star in?

The WISE 1639-6847 is in the Milky Way galaxy just like the Sun.

How many stars are in the WISE 1639-6847 system?

The WISE 1639-6847 is a single star, there are no other known stars in the system.

What type of star is the WISE 1639-6847?

The star WISE 1639-6847 is a Sub-brown dwarf star.

What temperature is star WISE 1639-6847?

The star WISE 1639-6847 has an effective temperature of 412 K. Find out more about the temperature of stars in Stellar guide
Class of stars Sub-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. Brown dwarfs of spectral class Y are the coolest and only a few of them have been discovered so far.
Closest stars

 SCR 1845-6357
 0.07 M☉ 4.5 ly

Gliese 693
 0.26 M☉ 5.2 ly

2MASS J1540-5101
 0.09 M☉ 5.7 ly

Gliese 674
 0.35 M☉ 6.2 ly

Delta Pavonis
 0.99 M☉ 7.2 ly
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