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2MASS 0036+1821
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Star 2MASS 0036+1821

LSPM J0036+1821 is an ultracool L3.5-type dwarf located approximately 28.5 light-years from the Sun. It is characterized by a surface temperature of 1900 K and a complex, highly active magnetosphere that produces Jupiter-like auroral radio emissions.
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Sun distance
28 light years
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2MASS 0036+1821

Brown dwarf
Spectral class: L3.5

Location +

Ascension iconRight ascension: 0h 36m 17.128s
Declination iconDeclination: 18° 21' 12.276'' (equatorial region)
Parallax iconParallax: 114.473
Distance iconSun distance: 28.492 ly | 8.7 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: 6 % M Sun
| 62.9 M Jupiter
 (estimate)
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Star mass
The estimated mass of the star 2MASS 0036+1821 is about 6 % of the Sun's mass, or approximately 62.9 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 R Jupiter
(estimate)
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Star size
Radius of the star 2MASS 0036+1821 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: 1900 K | 0.33 T Sun
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Star temperature
Surface temperature of 2MASS 0036+1821 is 1900 K, which is 33 % 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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2MASS 0036+1821 system structure

 2MASS 0036+1821

More about 2MASS 0036+1821

and temperature on its surface is around 1900 K (1627 °C), which is about 33 % of Sun's temperature.
       2MASS 0036+1821 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
LSPM J0036+1821, 2MASS J00361617+1821104, 2MASSW J0036159+182110, USNO-B1.0 1083-00010105, Gaia DR3 2794735086363871360, BNA 1A, 2MASSW J0036162+182110, WDS J00363+1821A, Gaia DR2 2794735086363871360, CNS5 175, 2MUCD 20029, WISEA J003616.79+182111.6, TIC 426959594, Gaia EDR3 2794735086363871360
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External sources
icon study
A Jupiter-like radio aurora in the L3.5 dwarf LSPM J0036+1821
Scientific study, Accepted: 07. 10. 2026
simbad icon
Simbad database (LSPM J0036+1821)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 2794735086363871360)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 2MASS 0036+1821 system from the Sun?

The 2MASS 0036+1821 system is 28 light years or 8.7 parsecs from the Sun.

What galaxy is the 2MASS 0036+1821 star in?

The 2MASS 0036+1821 is in the Milky Way galaxy just like the Sun.

How many stars are in the 2MASS 0036+1821 system?

The 2MASS 0036+1821 is a single star, there are no other known stars in the system.

What type of star is the 2MASS 0036+1821?

The star 2MASS 0036+1821 is a Brown dwarf star.

What temperature is star 2MASS 0036+1821?

The star 2MASS 0036+1821 has an effective temperature of 1900 K. 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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