Observation data Epoch J2000 [1] Equinox J2000 [1] | |
---|---|
Constellation | Hydra |
Right ascension | 11h 14m 51.337s [1] |
Declination | −26° 18′ 23.56″ [1] |
Characteristics | |
Spectral type | T7.5 [2] [3] [4] [5] [6] |
Apparent magnitude (i ( GMOS filter system)) | 23.21 ± 0.09 [5] |
Apparent magnitude (z ( GMOS filter system)) | 19.59 ± 0.04 [5] |
Apparent magnitude (J ( 2MASS filter system)) | >15.86 ± 0.08 [2] [3] |
Apparent magnitude (J ( MKO filter system)) | 15.52 ± 0.05 [6] |
Apparent magnitude (H ( 2MASS filter system)) | >15.73 ± 0.12 [3] |
Apparent magnitude (H ( MKO filter system)) | 15.82 ± 0.05 [6] |
Apparent magnitude (KS ( 2MASS filter system)) | >16.1 [3] |
Apparent magnitude (KS ( MKO filter system)) | 16.54 ± 0.05 [6] |
Astrometry | |
Proper motion (μ) |
RA: -3018.8 ± 1.1
[7]
mas/
yr Dec.: -384.1 ± 1.4 [7] mas/ yr |
Parallax (π) | 179.2 ± 1.4 mas [7] |
Distance | 18.2 ± 0.1
ly (5.58 ± 0.04 pc) |
Details | |
Mass | 0.029–0.048 [4] M☉ |
Mass | 30–50 [4] MJup |
Surface gravity (log g) | 5.0–5.3 [4] cgs |
Temperature | 725–775 [4] K |
Metallicity | -0.3 ± 0.1 [m/H] [4] |
Age | 3–8 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Location of 2M1114−26 in the constellation
Hydra |
2MASS J11145133−2618235 (designation abbreviated to 2MASS 1114−2618), [3] or 2M1114−26, [2] or 2M1114−2618, [2] or 2MASS 1114−26, [4] or 2MASS J1114−2618 [6]) is a nearby brown dwarf of spectral class T7.5, located in constellation Hydra [a] at approximately 18 light-years from Earth. [7]
2MASS 1114−2618 was discovered in 2005 by C. G. Tinney et al. from the 2MASS Wide-Field T Dwarf Search (WFTS), based on observations obtained at the Anglo-Australian Telescope, Siding Spring, Australia. In 2005 Tinney et al. published a paper in The Astronomical Journal, where they presented discovery of five new brown dwarfs of spectral type T, among which also was 2MASS 1114−2618. [2]
Trigonometric parallax of 2MASS 1114−2618, measured in 2012 by Dupuy & Liu under The Hawaii Infrared Parallax Program, is 0.1792 ± 0.0014 arcsec, corresponding to a distance 5.58 ± 0.04 pc, or 18.20 ± 0.14 ly. [7]
The photometric distance estimate of 2MASS 1114−2618, published in its discovery paper in 2005, is 7 pc (22.8 ly). [2] Spectrophotometric distance estimate by Kirkpatrick et al. (2012), is 6.6 pc (21.5 ly). [8]
2MASS 1114−2618 has quite a large proper motion of 3043.2 mas/ yr with position angle 262.75 degrees, [7] indicating motion in south-west direction on the sky. At distance 18.20 ly (assuming parallax 179.2 ± 1.4 mas), [7] corresponding tangential velocity is 80.56 km/s. [7]
The other four discoveries of brown dwarfs, presented in Tinney et al. (2005): [2]
Observation data Epoch J2000 [1] Equinox J2000 [1] | |
---|---|
Constellation | Hydra |
Right ascension | 11h 14m 51.337s [1] |
Declination | −26° 18′ 23.56″ [1] |
Characteristics | |
Spectral type | T7.5 [2] [3] [4] [5] [6] |
Apparent magnitude (i ( GMOS filter system)) | 23.21 ± 0.09 [5] |
Apparent magnitude (z ( GMOS filter system)) | 19.59 ± 0.04 [5] |
Apparent magnitude (J ( 2MASS filter system)) | >15.86 ± 0.08 [2] [3] |
Apparent magnitude (J ( MKO filter system)) | 15.52 ± 0.05 [6] |
Apparent magnitude (H ( 2MASS filter system)) | >15.73 ± 0.12 [3] |
Apparent magnitude (H ( MKO filter system)) | 15.82 ± 0.05 [6] |
Apparent magnitude (KS ( 2MASS filter system)) | >16.1 [3] |
Apparent magnitude (KS ( MKO filter system)) | 16.54 ± 0.05 [6] |
Astrometry | |
Proper motion (μ) |
RA: -3018.8 ± 1.1
[7]
mas/
yr Dec.: -384.1 ± 1.4 [7] mas/ yr |
Parallax (π) | 179.2 ± 1.4 mas [7] |
Distance | 18.2 ± 0.1
ly (5.58 ± 0.04 pc) |
Details | |
Mass | 0.029–0.048 [4] M☉ |
Mass | 30–50 [4] MJup |
Surface gravity (log g) | 5.0–5.3 [4] cgs |
Temperature | 725–775 [4] K |
Metallicity | -0.3 ± 0.1 [m/H] [4] |
Age | 3–8 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Location of 2M1114−26 in the constellation
Hydra |
2MASS J11145133−2618235 (designation abbreviated to 2MASS 1114−2618), [3] or 2M1114−26, [2] or 2M1114−2618, [2] or 2MASS 1114−26, [4] or 2MASS J1114−2618 [6]) is a nearby brown dwarf of spectral class T7.5, located in constellation Hydra [a] at approximately 18 light-years from Earth. [7]
2MASS 1114−2618 was discovered in 2005 by C. G. Tinney et al. from the 2MASS Wide-Field T Dwarf Search (WFTS), based on observations obtained at the Anglo-Australian Telescope, Siding Spring, Australia. In 2005 Tinney et al. published a paper in The Astronomical Journal, where they presented discovery of five new brown dwarfs of spectral type T, among which also was 2MASS 1114−2618. [2]
Trigonometric parallax of 2MASS 1114−2618, measured in 2012 by Dupuy & Liu under The Hawaii Infrared Parallax Program, is 0.1792 ± 0.0014 arcsec, corresponding to a distance 5.58 ± 0.04 pc, or 18.20 ± 0.14 ly. [7]
The photometric distance estimate of 2MASS 1114−2618, published in its discovery paper in 2005, is 7 pc (22.8 ly). [2] Spectrophotometric distance estimate by Kirkpatrick et al. (2012), is 6.6 pc (21.5 ly). [8]
2MASS 1114−2618 has quite a large proper motion of 3043.2 mas/ yr with position angle 262.75 degrees, [7] indicating motion in south-west direction on the sky. At distance 18.20 ly (assuming parallax 179.2 ± 1.4 mas), [7] corresponding tangential velocity is 80.56 km/s. [7]
The other four discoveries of brown dwarfs, presented in Tinney et al. (2005): [2]