2MASS J02431371-2453298

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Coordinates: Sky map 02h 43m 13.72s, −24° 53′ 29.8″

2MASS J02431371-2453298
Observation data
Epoch J2000      Equinox J2000
Constellation Fornax
Right ascension 02h 43m 13.72s[1]:{{{3}}}
Declination −24° 53′ 29.8″[1]:{{{3}}}
Characteristics
Spectral type T6
Apparent magnitude (J) 15.38 ± 0.05[1]:{{{3}}}
Apparent magnitude (H) 15.137 ± 0.109[1]:{{{3}}}
Apparent magnitude (K) 15.216 ± 0.168[1]:{{{3}}}
Astrometry
Proper motion (μ) RA: -288 ± 4[1]:{{{3}}} mas/yr
Dec.: -208 ± 3[1]:{{{3}}} mas/yr
Parallax (π) 93.62 ± 3.63[2]:{{{3}}} mas
Distance 35 ± 1 ly
(10.7 ± 0.4 pc)
Details
Temperature 800 – 1300 K
Other designations
2MASSI J0243137-245329[3]:{{{3}}}
2MASS 2MASS J02431371-24532982[1]:{{{3}}}
2MASSI J0243-2453[3]:{{{3}}}
2MASS 2MASS 0243-2453[3]:{{{3}}}
Database references
SIMBAD data

2MASS J02431371-2453298 (abbreviated to 2MASS 0243-2453) is a brown dwarf of spectral class T6,[3]:{{{3}}}[1]:{{{3}}} located in the constellation Fornax about 34.84 light-years from Earth.[2]:{{{3}}}

Discovery

2MASS 0243-2453 was discovered in 2002 by Adam J. Burgasser et al. from Two Micron All-Sky Survey (2MASS), conducted from 1997 to 2001. Follow-up observations were made in 1998—2001 using the Near-Infrared Camera, mounted on the Palomar 60 inch (1.5 m) Telescope; CTIO Infrared Imager (CIRIM) and Ohio State Infrared Imager/Spectrometer (OSIRIS), mounted on the Cerro Tololo Inter-American Observatory (CTIO) 1.5 m Telescope; and some additional observations were made using the Near Infrared Camera (NIRC), mounted on the Keck I 10 m telescope, and nearinfrared camera D78, mounted on the Palomar 5 m Hale Telescope. In 2002 Burgasser et al. published a paper, where they defined new spectral subtypes T1—T8, and presented discovery of 11 new T-type brown dwarfs, among which also was 2MASS 0243-2453. This 11 objects were among the earliest T-type brown dwarfs ever discovered: before this, the total number of known T-type objects was 13, and this discoveries increased it up to 24 (apart from additional T-type dwarfs, identified by Geballe et al. 2001 in SDSS data).[3]:{{{3}}}

Distance

Currently the most precise distance estimate of 2MASS 0243-2453 is published in 2004 by Vrba et al. trigonometric parallax, measured under U.S. Naval Observatory Infrared Astrometry Program: 93.62 ± 3.63 mas, corresponding to a distance 10.68 ± 0.43 pc, or 34.84 ± 1.41 ly.[2]:{{{3}}}

2MASS 0727+1710 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Vrba et al. (2004) 93.62 ± 3.63 10.68 ± 0.43 34.84 ± 1.41 [2]:{{{3}}}

Non-trigonometric distance estimates are marked in italic. The best estimate is marked in bold.

Space motion

Position of 2MASS 0243-2453 shifts due to its proper motion by 0.3548 arcseconds per year.

Properties

Surface temperature of 2MASS 0243-2453 is 800-1300 K. As with other brown dwarfs of spectral type T, its spectrum is dominated of methane.

See also

The other 10 brown dwarfs, presented in Burgasser et al. (2002):[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.0 2.1 2.2 2.3 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Lua error in package.lua at line 80: module 'strict' not found.

External links

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