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Brown dwarfs
Brown dwarfs are "failed stars," objects bridging the gap between giant planets like Jupiter and true stars. Unlike the Sun, their cores lack the pressure for stable hydrogen fusion, only managing limited deuterium burning. When orbiting stars, they act like distant cousins to planets, but many roam space alone. Their temperatures are much lower than stars, often cooling down to levels similar to Earth.
- Percentage of Brown dwarfs within 98.5 light years: 12.23 % (1165 from 9522 stars)
- Average mass of Brown dwarfs: 1.2-8.0% solar mass
- Average radius of Brown dwarfs: 9-11% solar radius
- Average temperature of Brown dwarfs: 600-2500 K
Brown dwarfs
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Nearest Brown dwarfs
| Star name | Mass | Distance | ||
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Luhman 16 LUH 16, Luhman–WISE 1, WISE J104915.57−531906.1, DENIS-P J104919.0−531910, 2MASS J10491891−5319100, IRAS Z10473-5303, AKARI J1049166−531907, GSC2.2 S11132026703, GSC2.3 S4BM006703 |
L7.5 | 0.03 M☉ | 6.5 ly |
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Luhman 16 B | T0.5 | 0.03 M☉ | 6.5 ly |
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WISE 0855-0714 WISEA J085510.74-071442.5, WISE J085510.83-071442.5 |
Y2 | 0.01 M☉ | 7.3 ly |
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2MASS J1812-2608 2MASS J18121245-2608024, IRAS 18090-2608, TIC 264867486, OGLE BLG-LPV-225466, Gaia DR2 4064714550310189440 |
T | 0.02 M☉ | 11.6 ly |
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Epsion Indi Bb | T6 | 0.05 M☉ | 12 ly |
Brown dwarfs
Latest news from Brown dwarfs
Massive brown dwarf HD 203771 b confirmed in eccentric orbit around orange dwarf
Yesterday
Stars | Exoplanets | Orange dwarfs | Brown dwarfThe massive brown dwarf known as HD 203771 b has been characterized as orbiting its host orange dwarf star once every 1140 days. Brown dwarfs are often called failed stars because they are more massive than planets but not heavy enough to sustain the nuclear fusion that powers stars. This particular companion follows an eccentric, or elongated, path that is inclined at an angle of approximately 130 degrees relative to its host. The host star itself has a mass estimated at 0.79 times that of the ...
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9. 10. 2026Stars | Brown dwarfs | Planetary atmosphereAnalysis of three early L-dwarfs, HD 89744 B, Gliese 1048 B, and LSPM J0632+5053 B, reveals gaseous silicon monoxide and silicate clouds in their atmospheres. JWST data confirms these mineral clouds form as silicon gas condenses, mimicking processes in giant planets....
9. 10. 2026Stars | Exoplanets | Brown dwarfA new exoplanet candidate, PALTA-1 b, has been identified orbiting the nearby ultracool dwarf star DENIS-P J1253108-570924. The planet, which has a mass roughly equivalent to a fraction of Jupiter, was found after eight years of precise positional monitoring....
9. 10. 2026Stars | Brown dwarfRadio observations of the L3.5 dwarf LSPM J0036+1821 reveal Jupiter-like auroral activity. The star shows a 3.08-hour rotation period and persistent magnetic pulses driven by electron interactions in its magnetosphere....
25. 9. 2026Stars | Brown dwarfs | James Webb Space Telescope | GaiBrown dwarf WISEA J155349.96+693355.2 is the first of its kind linked to the Gaia-Enceladus substructure. JWST data reveals its metal-poor atmosphere and an extreme, eccentric orbit, confirming its origin as an accreted object from an ancient galaxy collision....
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Browse the latest scientific studies on stars and exoplanets in our galaxy. Stellar Catalog provides access to scientific data from astrophysics and stellar or planetary astronomy. It's a resource for anyone interested in the newest discoveries about what lies beyond our solar system.
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