WISE J0521+1025
Brown dwarf in the constellation Orion
From Wikipedia, the free encyclopedia
WISE J0521+1025 is a nearby brown dwarf of spectral type T7.5, located in the constellation Orion at approximately 21.7 light-years (6.7 parsecs) from Earth.[3]
  WISE J0521+1025 Location of WISE J0521+1025 in the constellation Orion | |
| Observation data Epoch 2012.773[1] Equinox J2000 | |
|---|---|
| Constellation | Orion[2] |
| Right ascension | 05h 21m 26.349s[1] |
| Declination | 10° 25′ 27.41″[1] |
| Characteristics | |
| Spectral type | T7.5[1] |
| Apparent magnitude (J (2MASS)) | 15.262[1] |
| Apparent magnitude (H (2MASS)) | 15.222 ± 0.103[1] |
| Apparent magnitude (Ks (2MASS)) | 14.665[1] |
| Apparent magnitude (w1 (WISE)) | 14.098 ± 0.031[1] |
| Apparent magnitude (w2 (WISE)) | 12.286 ± 0.026[1] |
| Apparent magnitude (w3 (WISE)) | 10.306 ± 0.085[1] |
| Astrometry | |
| Proper motion (μ) | RA: +223.7±2.5 mas/yr[3] Dec.: −438.3±2.5 mas/yr[3] |
| Parallax (π) | 150.2±3.0 mas[3] |
| Distance | 21.7 ± 0.4 ly (6.7 ± 0.1 pc) |
| Details | |
| Temperature | 727±88[3] K |
| Other designations | |
| WISE J052126.29+102528.4[1] WISE J0521+1025[1] | |
| Database references | |
| SIMBAD | data |
At the time of discovery, it was the nearest known T dwarf in the northern sky.[1]
History of observations
WISE J0521+1025 was discovered by Bihain et al. by selection of sources with colours typical for T dwarfs from WISE All-Sky source catalogue and checking them for high proper motion using older surveys: 2MASS, DENIS, SDSS, SSS, DSS and UKIDSS. Three objects among about ten candidates, including WISE J0521+1025, were selected for spectroscopic follow up with Large Binocular Telescope (LBT). October 9, 2012 Bihain et al. carried out follow up observations of WISE J0521+1025 with near-Infrared spectrograph LUCI 1 on LBT. June 25, 2013 Astronomy & Astrophysics received the discovery paper, which was accepted for publication 10 July 2013.[1]
Distance
Distance of WISE J0521+1025 was estimated by Bihain et al. using mean absolute magnitudes of single T7.5 dwarfs, derived by Dupuy & Liu (2012) from trigonometric parallaxes:[4] 5.0 ± 1.3 pc (16.3 ± 4.2 ly).[1]
See also
Two other T dwarfs, announced in Bihain et al (2013):
- WISE J0457−0207 (T2)
- WISE J2030+0749 (T1.5)