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List of largest exoplanets
Below is a list of the largest exoplanets so far discovered, in terms of physical size, ordered by radius.
This list of extrasolar objects may and will change over time due to diverging measurements published between scientific journals, varying methods used to examine these objects, and the notably difficult task of discovering extrasolar objects in general. These objects are not stars, and are quite small on a universal or even stellar scale. Furthermore, these objects might be brown dwarfs, sub-brown dwarfs, or not even exist at all. Because of this, this list only cites the most certain measurements to date and is prone to change.
Different space organisations have different maximum masses for exoplanets. The NASA Exoplanet Archive (NASA EA) states that an object with a minimum mass lower than 30 MJ, not being a free-floating object, is qualified as an exoplanet. On the other hand, the official working definition by the International Astronomical Union (IAU) allows only exoplanets with a maximum mass of 13 MJ, that are orbiting a host object at a mass ratio of less than 4% or 0.04. For the purpose of the comparison of large planets, this article includes several of those listed by NASA EA up to the maximum 30 MJ with possible brown dwarfs among them of ≳ 13 MJ as stated by IAU.
Sub-brown dwarfs are formed in the manner of stars, through the collapse of a gas cloud (perhaps with the help of photo-erosion) but have a planetary mass, therefore are by definition below the limiting mass for thermonuclear fusion of deuterium (~ 13 MJ). However, there is no consensus amongst astronomers on whether the formation process should be taken into account when classifying an object as a planet. Free-floating sub-brown dwarfs can be observationally indistinguishable from rogue planets, which originally formed around a star and were ejected from orbit. Similarly, a sub-brown dwarf formed free-floating in a star cluster may be captured into orbit around a star, making distinguishing sub-brown dwarfs and large planets also difficult. A definition for the term "sub-brown dwarf" was put forward by the IAU Working Group on Extra-Solar Planets (IAU WGESP), which defined it as a free-floating body found in young star clusters below the lower mass cut-off of brown dwarfs.
The sizes are listed in units of Jupiter radii (RJ, 71 492 km). This list is designed to include all confirmed exoplanets that are larger than 1.6 times the size of Jupiter. Some well-known exoplanets that are smaller than 1.6 RJ (17.93 R🜨 or 114387 km) and are gas giants have been included for the sake of comparison.
For the candidate exoplanets and those with uncertain radii that could be below or above the adopted cut-off of 1.6 RJ, see the list of unconfirmed exoplanets and list of exoplanets with uncertain radii respectively.
This list contains planets with uncertain radii that could be below or above the adopted cut-off of 1.6 RJ, depending on the estimate.
These planets are also larger than 1.6 times the size of the largest planet in the Solar System, Jupiter, but have yet to be confirmed or are disputed.
Note: Some data may be unreliable or incorrect due to unit or conversion errors and some objects are candidate exoplanets such as TOI-7081 b and TOI-7018 b
These exoplanets were the largest at the time of their discovery.
Present day: 29 October 2025
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List of largest exoplanets AI simulator
(@List of largest exoplanets_simulator)
List of largest exoplanets
Below is a list of the largest exoplanets so far discovered, in terms of physical size, ordered by radius.
This list of extrasolar objects may and will change over time due to diverging measurements published between scientific journals, varying methods used to examine these objects, and the notably difficult task of discovering extrasolar objects in general. These objects are not stars, and are quite small on a universal or even stellar scale. Furthermore, these objects might be brown dwarfs, sub-brown dwarfs, or not even exist at all. Because of this, this list only cites the most certain measurements to date and is prone to change.
Different space organisations have different maximum masses for exoplanets. The NASA Exoplanet Archive (NASA EA) states that an object with a minimum mass lower than 30 MJ, not being a free-floating object, is qualified as an exoplanet. On the other hand, the official working definition by the International Astronomical Union (IAU) allows only exoplanets with a maximum mass of 13 MJ, that are orbiting a host object at a mass ratio of less than 4% or 0.04. For the purpose of the comparison of large planets, this article includes several of those listed by NASA EA up to the maximum 30 MJ with possible brown dwarfs among them of ≳ 13 MJ as stated by IAU.
Sub-brown dwarfs are formed in the manner of stars, through the collapse of a gas cloud (perhaps with the help of photo-erosion) but have a planetary mass, therefore are by definition below the limiting mass for thermonuclear fusion of deuterium (~ 13 MJ). However, there is no consensus amongst astronomers on whether the formation process should be taken into account when classifying an object as a planet. Free-floating sub-brown dwarfs can be observationally indistinguishable from rogue planets, which originally formed around a star and were ejected from orbit. Similarly, a sub-brown dwarf formed free-floating in a star cluster may be captured into orbit around a star, making distinguishing sub-brown dwarfs and large planets also difficult. A definition for the term "sub-brown dwarf" was put forward by the IAU Working Group on Extra-Solar Planets (IAU WGESP), which defined it as a free-floating body found in young star clusters below the lower mass cut-off of brown dwarfs.
The sizes are listed in units of Jupiter radii (RJ, 71 492 km). This list is designed to include all confirmed exoplanets that are larger than 1.6 times the size of Jupiter. Some well-known exoplanets that are smaller than 1.6 RJ (17.93 R🜨 or 114387 km) and are gas giants have been included for the sake of comparison.
For the candidate exoplanets and those with uncertain radii that could be below or above the adopted cut-off of 1.6 RJ, see the list of unconfirmed exoplanets and list of exoplanets with uncertain radii respectively.
This list contains planets with uncertain radii that could be below or above the adopted cut-off of 1.6 RJ, depending on the estimate.
These planets are also larger than 1.6 times the size of the largest planet in the Solar System, Jupiter, but have yet to be confirmed or are disputed.
Note: Some data may be unreliable or incorrect due to unit or conversion errors and some objects are candidate exoplanets such as TOI-7081 b and TOI-7018 b
These exoplanets were the largest at the time of their discovery.
Present day: 29 October 2025