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2MASS J1031-7323
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Star 2MASS J1031-7323

Little is known about object 2MASS J1031-7323. Based on its low brightness and position it seems to be a brown dwarf or a very low-mass star.
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Sun distance
60 light years
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2MASS J1031-7323

Brown dwarf, High proper motion star

Location +

Ascension iconRight ascension: 10h 31m 12.520s
Declination iconDeclination: -73° 23' 9.353'' (southern hemisphere)
Parallax iconParallax: 53.955
Distance iconSun distance: 60.450 ly | 18.5 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: 7 % M Sun
| 73.3 M Jupiter
 (estimate)
+
Star mass
The estimated mass of the star 2MASS J1031-7323 is about 7 % of the Sun's mass, or approximately 73.3 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 J1031-7323 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 iconTemperature: 2300 K
 (estimate)
+
Star temperature
Surface temperature of 2MASS J1031-7323 is estimated to be 2300 K, which is 40 % 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 J1031-7323 system structure

 2MASS J1031-7323

More about 2MASS J1031-7323

       2MASS J1031-7323 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 J10311237-7323084, Gaia DR3 5229173470875537664
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External sources
simbad icon
Simbad database (2MASS J10311237-7323084)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia DR3 5229173470875537664)
Archive from the Gaia mission

Frequently Asked Questions

How far is the 2MASS J1031-7323 system from the Sun?

The 2MASS J1031-7323 system is 60 light years or 18.5 parsecs from the Sun.

What galaxy is the 2MASS J1031-7323 star in?

The 2MASS J1031-7323 is in the Milky Way galaxy just like the Sun.

How many stars are in the 2MASS J1031-7323 system?

The 2MASS J1031-7323 is a single star, there are no other known stars in the system.

What type of star is the 2MASS J1031-7323?

The star 2MASS J1031-7323 is a Brown dwarf star.

What temperature is the 2MASS J1031-7323?

The primary in the 2MASS J1031-7323 system has an effective temperature of K ( °C). 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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 - 4.8 ly

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 - 7.5 ly

2MASS J11155037-6731332
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