The study of exoplanets is one of the most dynamic emerging fields of science, and these values may change as new discoveries are made.
[12][13][14][15] An Earth-mass planet claimed to orbit Alpha Centauri B (apparent magnitude = 1.33) was subsequently refuted.
[39] A predicted highly evaporating planet was proposed to orbit the star FU Orionis north with a density of about 0.0042 g/cm3.
2MASS J04414489+2301513 b is listed as the youngest planet in the NASA Exoplanet Archive, at an age of 1 Myr,[1] but fails the mass ratio criterion of the IAU working definition of an exoplanet; the mass ratio with the primary is larger than the L4/L5 limit of stability ≈ 1/25[59] and 'more likely to have been produced by cloud core fragmentation' (similar to a star).
[61] CI Tauri c would be the youngest radial velocity planet at an age of 2–3 Myr, if confirmed.
[67] A brown dwarf or planetary-mass companion was announced around the population II star HE 1523-0901, whose metallicity is −2.65±0.22 dex.
[70] A disputed substellar companion, possibly a Jovian planet, was announced to orbit[95] the B-type subdwarf star HD 149382 with a metallicity of -1.30 dex.
[15] Candidate planets were reported around the cool giants R Leonis (at 3537 L☉)[107], R Fornacis (at 5800 L☉)[104], BD+20°2457 (at 1479 L☉)[116][93], V Hydrae (at 18000 L☉)[117][106] and L2 Puppis (at 1490±150 L☉)[118][26].
The stars R126, R66 and HH 1177 in the Large Magellanic Cloud have luminosities of 1400000 L☉, 320000 L☉ and 19000 L☉[108][100] and have dust discs but no planets have been detected yet.
[105][102] A gas giant planet was found orbiting TVLM 513-46546,[127] which is an ultracool star (2242 K) located close to the brown dwarf/red dwarf mass boundary.
30 Arietis Bb was believed to be either brown dwarf or a massive gas giant in a quadruple star system before later studies revealing a true mass well above the red dwarf-mass limit of 80 MJup.
[137] Similarly, the star β3 Tucanae A, located in a sextuple system, was suggested to have a debris disk with no planets having been found.