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List of Smallest Exoplanetsreport

  • [Exoplanet]: SDSS J1228+1040 b(SDSS J122859.92+104033.0 b, WD 1226+110 b)
    [Radius (R⊕) (Earth = 1)]: 0.01008824?
    [Notes]: Remnant Iron core.
    (List)

  • [Exoplanet]: PSR B1828-11 b
    [Radius (R⊕) (Earth = 1)]: 0.016
    [Notes]: Unconfirmed, controversial
    (List)

  • [Exoplanet]: KOI-115.03 (Kepler-105 d)
    [Radius (R⊕) (Earth = 1)]: 0.0258±0.0015
    [Notes]: Unconfirmed, controversial
    (List)

  • [Exoplanet]: 1 Ceres
    [Radius (R⊕) (Earth = 1)]: 0.074662903
    [Notes]: Shown for comparison
    (List)

  • [Exoplanet]: WD 1145+017 b
    [Radius (R⊕) (Earth = 1)]: ~0.15
    [Notes]: Controversial, Possibly least massive exoplanet.
    (List)

  • [Exoplanet]: 134340 Pluto
    [Radius (R⊕) (Earth = 1)]: 0.182580746
    [Notes]: Shown for comparison
    (List)

  • [Exoplanet]: Moon
    [Radius (R⊕) (Earth = 1)]: 0.273925995
    [Notes]: Shown for comparison
    (List)

  • [Exoplanet]: Kepler-37 b
    [Radius (R⊕) (Earth = 1)]: 0.3
    [Notes]: Provisionally smallest exoplanet.
    (List)

  • [Exoplanet]: PSR B1257+12 b
    [Radius (R⊕) (Earth = 1)]: 0.338?
    [Notes]: Least massive exoplanet, at 0.02 Earth masses.
    (List)

  • [Exoplanet]: Mercury
    [Radius (R⊕) (Earth = 1)]: 0.38251803
    [Notes]: Shown for comparison
    (List)

  • [Exoplanet]: Kepler-444 b
    [Radius (R⊕) (Earth = 1)]: 0.403
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-102 b
    [Radius (R⊕) (Earth = 1)]: 0.47
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-444 c
    [Radius (R⊕) (Earth = 1)]: 0.497
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1308 b
    [Radius (R⊕) (Earth = 1)]: 0.5
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-138 b
    [Radius (R⊕) (Earth = 1)]: 0.52
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-444 d
    [Radius (R⊕) (Earth = 1)]: 0.53
    [Notes]:
    (List)

  • [Exoplanet]: Mars
    [Radius (R⊕) (Earth = 1)]: 0.531436186
    [Notes]: Shown for comparison
    (List)

  • [Exoplanet]: Kepler-62 c
    [Radius (R⊕) (Earth = 1)]: 0.54
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-444 e
    [Radius (R⊕) (Earth = 1)]: 0.546
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-42 d
    [Radius (R⊕) (Earth = 1)]: 0.57
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-102 c
    [Radius (R⊕) (Earth = 1)]: 0.58
    [Notes]:
    (List)

  • [Exoplanet]: KOI-1843.03
    [Radius (R⊕) (Earth = 1)]: 0.59
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1087 b
    [Radius (R⊕) (Earth = 1)]: 0.59
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1583 b
    [Radius (R⊕) (Earth = 1)]: 0.59
    [Notes]:
    (List)

  • [Exoplanet]: K2-89 b
    [Radius (R⊕) (Earth = 1)]: 0.617
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1371 c
    [Radius (R⊕) (Earth = 1)]: 0.63
    [Notes]:
    (List)

  • [Exoplanet]: UCF-1.02
    [Radius (R⊕) (Earth = 1)]: 0.64
    [Notes]: Unconfirmed, controversial
    (List)

  • [Exoplanet]: Kepler-1542 c
    [Radius (R⊕) (Earth = 1)]: 0.64
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1351 b
    [Radius (R⊕) (Earth = 1)]: 0.64
    [Notes]:
    (List)

  • [Exoplanet]: UCF-1.01
    [Radius (R⊕) (Earth = 1)]: 0.65
    [Notes]: Unconfirmed, controversial
    (List)

  • [Exoplanet]: Kepler-271 d
    [Radius (R⊕) (Earth = 1)]: 0.65
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-431 c
    [Radius (R⊕) (Earth = 1)]: 0.654
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1558 b
    [Radius (R⊕) (Earth = 1)]: 0.67
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1349 b
    [Radius (R⊕) (Earth = 1)]: 0.68
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-141 b
    [Radius (R⊕) (Earth = 1)]: 0.69
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-1339 b
    [Radius (R⊕) (Earth = 1)]: 0.69
    [Notes]:
    (List)

  • [Exoplanet]: Kepler-378 c
    [Radius (R⊕) (Earth = 1)]: 0.7
    [Notes]:
    (List)

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About This Tool

NASA’s Tess recently discovered a tiny exoplanet, just 80 percent the size of earth, 10 percent smaller than the smallest exoplanet they’ve ever found. For those of you who follow astronomy regularly, there are only about 37 exoplanets that scientists have found so far, and the list is compiled in this random tool.

Currently, exoplanets discovered by scientists are generally larger than Earth, especially gas giants such as Hot Jupiter and Hot Neptune, and even rocky planets are generally slightly larger than Earth. The larger the exoplanet, the easier it is to detect, whether by transit or by other means. As a result, many of the smaller exoplanets are still hard for humans to find. The presence of smellest planets, as collated by the generator, overturns previous claims by scientists that there are many, many, many planets in the universe that we don’t know about, and is profound and thought provoking.

Click the "Display All Items" button and you will get a list of smallest exoplanets.

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