Top Results for Neptune Class

HAT-P-11b is a Neptune-sized exoplanet discovered by the HATNet survey, orbiting the orange dwarf star HAT-P-11. It was one of the first small exoplanets to have water vapor successfully detected in its atmosphere, achieved via observations by the Hubble Space Telescope. The planet has a highly ecce...

Kepler-36c is a transiting exoplanet orbiting the star Kepler-36 and was reported in 2012 from observations by NASA's Kepler mission. It is larger and less dense than neighboring Kepler-36b, indicating a substantial volatile envelope rather than a predominantly rocky composition. The two planets hav...

TOI-1338 b is a circumbinary exoplanet discovered in 2020 by NASA's Transiting Exoplanet Survey Satellite (TESS). It was the first circumbinary planet identified by the TESS mission, orbiting a binary star system composed of an orange dwarf and a red dwarf located roughly 1,300 light-years away in t...

GJ 436 b is a Neptune-sized exoplanet orbiting the red dwarf star GJ 436, located approximately 33 light-years from Earth. Discovered in 2004 via radial velocity measurements and later confirmed as a transiting planet, it has a mass and radius similar to Neptune. The planet orbits very close to its...

HD 69830 d is an extrasolar planet orbiting the K-type orange dwarf star HD 69830, located approximately 41 light-years away in the constellation Puppis. Discovered in 2006 through radial velocity measurements, it is the outermost of three confirmed Neptune-mass planets within the system. The planet...

HD 69830 b is the innermost known planet around HD 69830, a nearby K-type star. It has a minimum mass of about 10 Earth masses and an orbital period of roughly 8.7 days, placing it in the super-Earth or mini-Neptune range rather than among Jupiter-sized planets. The same system contains two more kno...

Gliese 581 b is a Neptune-class exoplanet orbiting the nearby M-dwarf Gliese 581, about 20 light-years from Earth. It has a minimum mass of roughly 16 Earth masses and completes an orbit in about 5.4 days at a distance of only a few hundredths of an astronomical unit. The planet was detected through...

GJ 3470 b is a transiting warm sub-Neptune orbiting the M-dwarf GJ 3470, about 96 light-years from Earth. It has a mass of roughly 12.6 Earth masses, a radius about 4.3 times Earth’s, and an orbital period of around 3.3 days. Ultraviolet observations have detected hydrogen and helium escaping from i...

HD 69830 c is a confirmed Neptune-class planet detected by measuring the radial-velocity motion of the K-type star HD 69830. It was announced in 2006 as the middle member of a three-planet system and travels around its star at about 0.19 astronomical units. Its orbital period is approximately 31.6 d...

55 Cancri c is a confirmed Neptune-class exoplanet orbiting the G-type star 55 Cancri, also known as Copernicus. Radial-velocity observations identified it in 2002 as the second planet in the system then known, and its orbit takes about 44 days at a distance of approximately 0.24 astronomical units....

Mu Arae c is a close-orbiting exoplanet detected by radial-velocity measurements around Mu Arae, a G-type star about 50 light-years away. Reported in 2004, it has a minimum mass of roughly 10 Earth masses and completes an orbit in about 9.6 days, placing it in the hot-Neptune or Neptune-mass range....

HD 10180 e is a radial-velocity exoplanet in the multi-planet system around HD 10180, a Sun-like star about 127 light-years away. It has a minimum mass of roughly 26 Earth masses and an orbital period of about 49.8 days, placing it in the Neptune-mass class. The planet was reported from HARPS observ...

HD 10180 d is a radial-velocity exoplanet orbiting the Sun-like star HD 10180 at a distance of about 127 light-years. Its measured minimum mass is approximately 12 Earth masses and its orbital period is about 16.4 days, placing it near the lower end of the Neptune-mass range. It is one of six confir...

HD 10180 f is a super-Earth or mini-Neptune candidate orbiting the Sun-like star HD 10180, approximately 127 light-years from Earth. It belongs to a compact, multi-planet system identified through radial-velocity measurements made with the HARPS instrument. The planet was included in the system anno...

61 Virginis d is the outermost member of the three-planet system reported around the nearby Sun-like star 61 Virginis. It was identified through the radial-velocity method and has an orbital period of about 123 days. Its minimum mass is approximately 22.9 times that of Earth, placing it in the Neptu...

GJ 3293 b is a giant exoplanet orbiting the nearby M-dwarf star GJ 3293. It was identified through measurements of the host star’s radial-velocity changes, which reveal the gravitational pull of an orbiting planet. The system also contains other detected planetary companions, making GJ 3293 b releva...

HD 4308 b is a low-mass exoplanet detected through the radial-velocity method around HD 4308, a metal-poor G-type star. Its minimum mass is about 14 times that of Earth, placing it near the boundary between super-Earth and Neptune-class planets. The system was reported in 2005, when planets of this...

GJ 3293 e is an exoplanet orbiting the red dwarf star GJ 3293, which lies roughly 65 light-years from the Sun. It was identified through measurements of the star's motion using the radial-velocity method and is the outermost of the system's known planets, not the innermost. Its reported classificati...