DENIS-P J1228.2-1547 is a system of two nearly equal brown dwarfs, both are of spectral types L5.5:,[1]:{{{3}}} located in constellation Corvus at approximately 20.2 parsecs or 66.0 light-years from Earth.[2]:{{{3}}}
History of observations
DENIS-P J1228.2-1547 is one on the first free-floating L dwarfs discovered. It was discovered in 1997 by Xavier Delfosse and colleagues from the DENIS survey.[3]:{{{3}}}
The second component (B) was discovered by Martín and colleagues using near-infrared camera NICMOS on Hubble Space Telescope. It was announced in 1999.[4]:{{{3}}}
See also
The other two free-floating L dwarfs, detected by Delfosse et al. and announced in 1997:[3]:{{{3}}}
A free-floating L dwarf, detected by Kirkpatrick et al., announced also in 1997, but earlier:[5]:{{{3}}}
A free-floating L dwarf, detected by Ruiz et al., announced also in 1997, but later:[6]:{{{3}}}
References
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- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
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Celestial objects by systems. Secondary members are listed in small print.
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- Gliese 292.1 (65.2±1.4 ly)
- Gliese 268.2 (65.2±1.3 ly)
- GJ 1278 (65.3±1.4 ly)
- Gliese 342 (65.4±1.4 ly)
- Gliese 747.3 (65.4±2.0 ly)
- Gliese 456.1 (65.6±1.3 ly)
- star
- HD 110810 (65.6±1.3 ly)
- HD 136923 (65.7±1.2 ly)
- HD 149806 (65.7±1.2 ly)
- star
- GJ 3620 (65.9±1.7 ly)
- Gliese 765.4 (65.9±1.1 ly)
- star
- Gliese 199 (66.1±3.0 ly)
- star
- Gliese 836.8 (66.2±2.0 ly)
- Gliese 221 (66.3+2.3
−2.1 ly)
- 3 planets: b
- c
- d
- Gliese 840 (66.3±1.3 ly)
- GJ 2001 (66.3±1.1 ly)
- Gliese 558 (66.4±1.8 ly)
- Gliese 257.1 (66.6±1.3 ly)
- GJ 1069 (66.6+6.7
−5.6 ly)
- brown dwarf
- HD 114783 (66.6±1.5 ly)
- planet b
- DK Leonis (66.6±2.4 ly)
- HD 30501 (66.7±0.9 ly)
- star
- GJ 9714 (66.7±2.4 ly)
- Gliese 783.2 (66.8±1.3 ly)
- star
- GJ 1172 (66.9±2.3 ly)
- GJ 3358 (66.9±1.4 ly)
- HD 155712 (67.0±1.4 ly)
- Gliese 217 (67.1±1.4 ly)
- HD 332518 (67.3±1.7 ly)
- Gliese 808.2 (67.4±2.6 ly)
- GJ 1108 (67.6+4.7
−4.2 ly)
- star
- Gliese 53.1 (67.7±1.5 ly)
- star
- GJ 1084 (67.7±1.5 ly)
- GJ 1008 (67.7±2.5 ly)
- Gliese 30 (67.7±1.5 ly)
- Gliese 544 (67.8±1.6 ly)
- star
- GJ 1280 (67.9±1.5 ly)
- HD 104067 (67.9±1.5 ly)
- planet b
- Gliese 533 (68.0±2.6 ly)
- star
- Gliese 415 (68.2±2.8 ly)
- Gliese 371 (68.4±2.3 ly)
- HD 220221 (68.4±1.4 ly)
- HD 119802 (68.5±1.7 ly)
- Gliese 491 (68.5±1.3 ly)
- star
- HD 216259 (68.6±1.7 ly)
- Gliese 396 (68.6±0.9 ly)
- Gliese 889 (68.9±2.8 ly)
- star
- GJ 1165 (69.1±2.9 ly)
- Gliese 659 (69.2±2.9 ly)
- star
- Gliese 276 (69.3±1.9 ly)
- GJ 1048 (69.3±1.6 ly)
- Gliese 155.2 (69.5±1.4 ly)
- HD 97658 (69.5±1.5 ly)
- planet b
- HD 92945 (69.8±1.0 ly)
- Gliese 857.1 (69.8±2.6 ly)
- star
- V775 Herculis (69.9±1.6 ly)
- GJ 4268 (70.0±1.0 ly)
- star
- GJ 3071 (70.0±2.5 ly)
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- DENIS-P J1228.2-1547 (66.0+2.6
−2.4 ly)
- L-type brown dwarf B
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- WISE 0413-4750 (~66.2 ly)
- WISE 0123+4142 (~67.2 ly)
- WISE 0625+5646 (~67.2 ly)
- WISE 0821+1443 (~68.2 ly)
- WISE 0448-1935 (~69.8 ly)
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- WISE 0535-7500 (68.5+42.4
−35.9 ly)
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