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WISEA J2354+0240
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Star WISEA J2354+0240

Sub-brown dwarf WISEA J2354+0240 is located 36 light years away from the Sun. It is a single star of spectral class Y1, 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
36 light years
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WISEA J2354+0240

Sub-brown dwarf
Spectral class: Y1

Location +

Ascension iconRight ascension: 23h 54m 2.790s
Declination iconDeclination: 2° 40' 14.100'' (equatorial region)
Parallax iconParallax: 90.599
Distance iconSun distance: 36.000 ly | 11.0 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)
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Star mass
The estimated mass of the star WISEA J2354+0240 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)
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Star size
Radius of the star WISEA J2354+0240 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: 350 K | 0.06 T Sun
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Star temperature
Surface temperature of WISEA J2354+0240 is 350 K, which is 6 % 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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WISEA J2354+0240 system structure

 WISEA J2354+0240

More about WISEA J2354+0240

Nearby brown dwarf WISEA J2354+0240 is is is much smaller than the Sun and temperature on its surface is around 350 K (77 °C), which is about 6 % of Sun's temperature.
       WISEA J2354+0240 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
WISEA J235402.79+024014.1
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External sources
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Frequently Asked Questions

How far is the WISEA J2354+0240 system from the Sun?

The WISEA J2354+0240 system is 36 light years or 11.0 parsecs from the Sun.

What galaxy is the WISEA J2354+0240 star in?

The WISEA J2354+0240 is in the Milky Way galaxy just like the Sun.

How many stars are in the WISEA J2354+0240 system?

The WISEA J2354+0240 is a single star, there are no other known stars in the system.

What type of star is the WISEA J2354+0240?

The star WISEA J2354+0240 is a Sub-brown dwarf star.

What temperature is star WISEA J2354+0240?

The star WISEA J2354+0240 has an effective temperature of 350 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

 2MASS J0024-0158
 0.08 M☉ 7.5 ly

2MASS J00345157+0523050
 0.04 M☉ 7.9 ly

CFBDS J003402-005206
 - 8.7 ly

G 32-5
 0.24 M☉ 8.8 ly

Iota Piscium
 - 9.1 ly
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