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33 G. Librae D
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Star 33 G. Librae D

Brown dwarf 33 G. Librae D is located 19 light years away from the Sun. It is a single star of spectral class T8 C, that has 5 % of solar mass. For now, there are no known exoplanets in this star system.
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Sun distance
19 light years
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33 G. Librae D

Brown dwarf
Spectral class: T8 C

Basic characteristic

icon weight
Mass: 5 % M Sun
| 52 M Jupiter
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Star mass
Mass of the star 33 G. Librae D is 0.05 solar masses (or 52.4 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)
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Star size
Radius of the star 33 G. Librae D 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: 500 K | 0.09 T Sun
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Star temperature
Surface temperature of 33 G. Librae D is 500 K, which is 9 % 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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33 G. Librae D system structure

 33 G. Librae A
33 G. Librae B
33 G. Librae C
33 G. Librae D

More about 33 G. Librae D

33 G. Librae D is approximately 10 % of the size of Sun and temperature on its surface is around 500 K (227 °C), which is about 9 % of Sun's temperature.
       33 G. Librae D 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
GJ 570 D, 2MASS J14571496-2121477, Gaia EDR3 6305165514134625024
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External sources
icon study
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Scientific study, Accepted: 29. 12. 2026
icon study
A Sample of Thick-Disk Stars Hosting Hot Jupiters
Scientific study, Accepted: 16. 10. 2026
icon study
icon study
icon study
icon study
icon study
icon study
icon study
Any colour you like: the diverse chromaticities of white dwarfs
Scientific study, Accepted: 15. 10. 2026
icon study
A Sample of Thick-Disk Stars Hosting Hot Jupiters
Scientific study, Accepted: 15. 10. 2026
simbad icon
Simbad database (GJ 570 D)
Astronomical database SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data)
gaia icon
Gaia database (Gaia EDR3 6305165514134625024)
Archive from the Gaia mission

News from this star system

TOI-5322 b orbits an ancient star in the milky way thick disk
iconToday
Image: TOI-5322 b orbits an ancient star in the milky way thick disk
The hot Jupiter TOI-5322 b orbits an ancient star in the Milky Way thick disk. New analysis shows these older systems host planets that are often less massive and have longer orbital periods than those in the younger thin disk. #Astronomy #Exoplanets...
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White dwarf stars reveal a diverse range of unusual visible colors
iconToday
Image: White dwarf stars reveal a diverse range of unusual visible colors
While most white dwarfs appear white, new research shows their dense atmospheres can produce unexpected colours. By modelling light emissions, researchers found that some of these stellar remnants would appear yellow, green, cyan, pink, or purple up close....
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WASP-33 b and other hot Jupiters identified as prime targets for structural studies
iconYesterday
Image: WASP-33 b and other hot Jupiters identified as prime targets for structural studies
WASP-33 b, WASP-76 b, and HAT-P-32 b are identified as the best candidates for studying how stellar gravity shapes exoplanet interiors. Measuring their physical deformation will help reveal their deep, internal density structures using JWST and Ariel data....
Read article tag icon

Frequently Asked Questions

How far is the 33 G. Librae D system from the Sun?

The 33 G. Librae D system is 19 light years or 5.9 parsecs from the Sun.

What galaxy is the 33 G. Librae D star in?

The 33 G. Librae D is in the Milky Way galaxy just like the Sun.

How many stars are in the 33 G. Librae D system?

The 33 G. Librae D is a single star, there are no other known stars in the system.

What type of star is the 33 G. Librae D?

The star 33 G. Librae D is a Brown dwarf star.

What temperature is star 33 G. Librae D?

The star 33 G. Librae D has an effective temperature of 500 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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