2M1207
Sign in to saveAlso known as 2M1207 A
2M1207, 2M1207A or 2MASS J12073346−3932539 is a brown dwarf located in the constellation Centaurus; a companion object, 2M1207b, may be the first extrasolar planetary-mass companion to be directly imaged, and is the first discovered orbiting a brown dwarf.
Wikidata facts
- Distance from Earth
- 64.308
- Radius
- 0.21887
- Mass
- 0.024
- Image
- Primera foto planeta extrasolar ESO.jpg
Show 17 more facts
- right ascension
- 181.88944813534997
- declination
- -39.54833795144000
- effective temperature
- 2825
- radial velocity
- 7.50
- apparent magnitude
- 17.388071
- catalog code
- TIC 102076870
- spectral class
- M8pec
- parallax
- 18.51
- luminosity
- 0.015
- absolute magnitude
- 9.38
- age estimated by a dating method
- 0.008
- right ascension component of proper motion
- -64.083
- declination component of proper motion
- -23.72
- surface gravity
- 300000
- Commons category
- 2M1207
- time of discovery or invention
- 2005-00-00
- semi-major axis of an orbit
- 42
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5 sectionsContents
- Planetary system
- See also
- Notes
- References
- External links
2M1207, 2M1207A or 2MASS J12073346−3932539 is a brown dwarf located in the constellation Centaurus; a companion object, 2M1207b, may be the first extrasolar planetary-mass companion to be directly imaged, and is the first discovered orbiting a brown dwarf.
2M1207 was discovered during the course of the 2MASS infrared sky survey: hence the "2M" in its name, followed by its celestial coordinates. With a fairly early (for a brown dwarf) spectral type of M8, it is very young, and probably a member of the TW Hydrae association. Its estimated mass is around 25 Jupiter masses. The companion, 2M1207b, is estimated to have a mass of 5–6 Jupiter masses. Still glowing red hot, it will shrink to a size slightly smaller than Jupiter as it cools over the next few billion years.