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2MASS J2151-4853
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Star 2MASS J2151-4853

Brown dwarf 2MASS J2151-4853 is located 54 light years away from the Sun. It is a single star of spectral class T4.5, that has typically about 3 % of solar mass. For now, there are no known exoplanets in this star system.
Sun distance
54 light years
galaxy map

2MASS J2151-4853

Brown dwarf
Spectral class: T4.5

Location +

Ascension iconRight ascension: 21h 51m 38.399s
Declination iconDeclination: -48° 53' 54.251'' (southern hemisphere)
Parallax iconParallax: 60
Distance iconSun distance: 54.359 ly | 16.7 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 2MASS J2151-4853 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
| 1.1 R Jupiter
(estimate)
+
Star size
Radius of the star 2MASS J2151-4853 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

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
More about 2MASS J2151-4853
       2MASS J2151-4853 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
2MASS J21513839-4853542
External sources
simbad icon
Simbad database (2MASS J21513839-4853542)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
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
Closest stars

 HD 207129
 0.97 M☉ 3.9 ly

2MASS J2141-5118
 - 4.1 ly

L 355-62
 - 4.1 ly

WT 870
 - 5.6 ly

WT 792
 - 6.2 ly
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