WISE 0734−7157
Brown dwarf in the constellation Volans
From Wikipedia, the free encyclopedia
WISE J073444.02−715744.0 (designation abbreviated to WISE 0734−7157) is a brown dwarf of spectral class Y0,[1] located in constellation Volans at approximately 43 light-years from Earth.[4] It is one of the furthest Y0 brown dwarfs known.
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| Observation data Epoch J2000[1] Equinox J2000[1] | |
|---|---|
| Constellation | Volans |
| Right ascension | 07h 34m 44.02s[1] |
| Declination | −71° 57′ 44″[1] |
| Characteristics | |
| Spectral type | Y0[1] |
| Apparent magnitude (J (MKO-NIR filter system)) | 20.41 ± 0.27[1] |
| Astrometry | |
| Proper motion (μ) | RA: −565.67 ±0.16 mas/yr[2] Dec.: −68.88 ±0.16 mas/yr[2] |
| Parallax (π) | 73.35±0.71 mas[2] |
| Distance | 44.5 ± 0.4 ly (13.6 ± 0.1 pc) |
| Details[3] | |
| Mass | 18+2 −3 MJup |
| Radius | 0.93±0.02 RJup |
| Surface gravity (log g) | 4.56+0.04 −0.05 cgs |
| Temperature | 481+5 −6 K |
| Metallicity | = 0.16±0.02 |
| Other designations | |
| WISE J073444.02−715744.0,[1] WISE 0734−7157[1] | |
| Database references | |
| SIMBAD | data |
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Discovery
WISE 0734−7157 was discovered in 2012 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite—NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. In 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 0734−7157.[1]
Distance
Currently the most accurate distance estimate of WISE 0734−7157 is a trigonometric parallax, published in 2019 by Kirkpatrick et al.: 13.3+0.4
−0.4 pc, or 43.5+1.4
−1.3 ly.[4]
See also
The other six discoveries of brown dwarfs, published in Kirkpatrick et al. (2012):[1]
- WISE 0146+4234 (Y0)
- WISE 0350−5658 (Y1)
- WISE 0359−5401 (Y0)
- WISE 0535−7500 (≥Y1)
- WISE 0713−2917 (Y0)
- WISE 2220−3628 (Y0)
Lists: