2M1207

2M1207 (alternatively 2MASSW J1207334-393254) is a brown dwarf, that is, in turn, orbited by an object close to the mass of Planet Jupiter.^[2]^[3] Its mass is 20 times that of Planet Jupiter, and 1.2 percent that of the mass of Sol, our sun.

Its companion, 2M1207 b is 5 times the mass of Jupiter.^[4] The average distance between the pair is 55 astronomical units.^[1]

They are located 230 lightyears from the Solar system, in the constellation Hydra.^[4]

References

↑ ^1.0 ^1.1 "Artist's impression of the brown dwarf 2M1207". Herschel - Science Portal. 2012-03-12. Archived from the original on 2026-01-21. Retrieved 2026-08-08. This illustration shows an artist's impression of the brown dwarf 2MASSW J1207334-393254, or 2M1207 for short. With a mass that amounts to 25 times that of Jupiter, 2M1207 is surrounded by a circumstellar disc of gas and dust and possesses a planetary companion five times more massive than Jupiter. The planetary companion lies at a very large distance from 2M1207 – the projected distance between the two bodies measuring 55 astronomical units (AU).
↑ "★ Star 2M1207". Stellar Catalog. Retrieved 2026-08-08. Brown dwarf 2M1207 is located 211 light years away from the Sun. It is a single star, that has 2 % of solar mass. There is at least one exoplanet in this system.
↑ David Kipping (2026-08-07). "We Need to Talk About That "First Exomoon" Discovery". Cool Worlds. Archived from the original on 2026-08-08. Retrieved 2026-08-08 – via YouTube. David Kipping explores the technical and linguistic complexities behind recent claims of discovering a first exomoon. This discussion examines established astronomical classification systems, the criteria for substellar objects, and the challenges inherent in distinguishing between planets and natural satellites in hierarchical star systems.
↑ ^4.0 ^4.1 Alicia Cermak (2010-04-26). "2M1207 b - First image of an exoplanet". NASA Science. Archived from the original on 2026-06-06. Retrieved 2026-08-08. 2M1207 b is a Jupiter-like planet, 5 times more massive than Jupiter. It orbits the brown dwarf at a distance 55 times larger than the Earth to the Sun, nearly twice as far as Neptune is from the Sun.

[Herschel-2m1207-2012-03-12-1] 1.0 ^1.1 "Artist's impression of the brown dwarf 2M1207". Herschel - Science Portal. 2012-03-12. Archived from the original on 2026-01-21. Retrieved 2026-08-08. This illustration shows an artist's impression of the brown dwarf 2MASSW J1207334-393254, or 2M1207 for short. With a mass that amounts to 25 times that of Jupiter, 2M1207 is surrounded by a circumstellar disc of gas and dust and possesses a planetary companion five times more massive than Jupiter. The planetary companion lies at a very large distance from 2M1207 – the projected distance between the two bodies measuring 55 astronomical units (AU).

[stellarcatalog-2m1207-2] "★ Star 2M1207". Stellar Catalog. Retrieved 2026-08-08. Brown dwarf 2M1207 is located 211 light years away from the Sun. It is a single star, that has 2 % of solar mass. There is at least one exoplanet in this system.

[YouTube-CoolWorlds-2026-08-07-3] David Kipping (2026-08-07). "We Need to Talk About That "First Exomoon" Discovery". Cool Worlds. Archived from the original on 2026-08-08. Retrieved 2026-08-08 – via YouTube. David Kipping explores the technical and linguistic complexities behind recent claims of discovering a first exomoon. This discussion examines established astronomical classification systems, the criteria for substellar objects, and the challenges inherent in distinguishing between planets and natural satellites in hierarchical star systems.

[Nasa-2m1207-2010-04-26-4] 4.0 ^4.1 Alicia Cermak (2010-04-26). "2M1207 b - First image of an exoplanet". NASA Science. Archived from the original on 2026-06-06. Retrieved 2026-08-08. 2M1207 b is a Jupiter-like planet, 5 times more massive than Jupiter. It orbits the brown dwarf at a distance 55 times larger than the Earth to the Sun, nearly twice as far as Neptune is from the Sun.

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