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2MASS J1155-4008
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Star 2MASS J1155-4008

Binary star 2MASS J1155-4008 is located 203 light years away from the Sun. It consists of 2 red dwarf stars. For now, there are no known exoplanets in this star system.
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Sun distance
203 light years
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2MASS J1155-4008 A

Red dwarf

Location +

Ascension iconRight ascension: 11h 55m 16.644s
Declination iconDeclination: -40° 8' 57.844'' (southern hemisphere)
Parallax iconParallax: 16.041
Distance iconSun distance: 203.332 ly | 62.3 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: 25 % M Sun
| 262 M Jupiter
+
Star mass
Mass of the star 2MASS J1155-4008 A is 0.250 solar 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: 26 % R Sun
| 2.5 R Jupiter
+
Star size
Radius of the star 2MASS J1155-4008 A is 0.255 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: 3500 K | 0.61 T Sun
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Star temperature
Surface temperature of 2MASS J1155-4008 A is 3500 K, which is 61 % 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

Magnitude iconApparent magnitude (V): 16.4
Magnitude iconAbsolute magnitude (V): 12.4
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

2MASS J1155-4008 B

Red dwarf

Location +

Distance iconDistance from the primary: 0.04 AU

Basic characteristic

icon weight
Mass: 20.8 % M Sun
| 218 M Jupiter
+
Star mass
Mass of the star 2MASS J1155-4008 B is 0.250 solar 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: 23 % R Sun
| 2.3 R Jupiter
+
Star size
Radius of the star 2MASS J1155-4008 B is 0.233 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: 3300 K | 0.57 T Sun
+
Star temperature
Surface temperature of 2MASS J1155-4008 B is 3300 K, which is 57 % 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 J1155-4008 system structure

 2MASS J1155-4008 A
2MASS J1155-4008 B 0.04 AU

More about 2MASS J1155-4008

       2MASS J1155-4008 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
NGTS-EB-8, 2MASS J11551666-4008570, TIC 165227846, Gaia DR3 3459141135209729536
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External sources
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Frequently Asked Questions

How far is the 2MASS J1155-4008 system from the Sun?

The 2MASS J1155-4008 system is 203 light years or 62.3 parsecs from the Sun.

What galaxy is the 2MASS J1155-4008 star in?

The 2MASS J1155-4008 is in the Milky Way galaxy just like the Sun.

How many stars are in the 2MASS J1155-4008 system?

The 2MASS J1155-4008 system contains 2 stars.

What type of star is the 2MASS J1155-4008?

The primary in the 2MASS J1155-4008 system is a Red dwarf star.

What temperature is star 2MASS J1155-4008?

The primary in the 2MASS J1155-4008 system has a temperature of 3500 K. Find out more about the temperature of stars in Stellar guide

stellar brief logoStellar Brief

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27. 10. 2026
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V1298 Tau b showed helium absorption during all four observed transits across four years, but its active host star may affect the signal. The latest findings also point to silicate clouds on TOI-561 b, a warped dust ring around CQ Tau, and a giant planet candidate near Boyajian's star that may be surrounded by vast rings. New atmospheric models reveal why gas compositions can vary across hot giant planets.
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