WISE 1506+7027
Star in the constellation Ursa Minor
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WISEPC J150649.97+702736.0 (designation abbreviated to WISE 1506+7027, or WISE J1506+7027) is a brown dwarf of spectral class T6,[2][3] located in the constellation Ursa Minor. It is the nearest known star or brown dwarf in this constellation.[5] It is one of the Sun's nearest neighbors, at a distance of 16.85 light-years.[4] Brown dwarfs closer to the Sun include Luhman 16, WISE 0855−0714, ε Indi Ba and ε Indi Bb.
  WISE 1506+7027 Location of WISE 1506+7027 in the constellation Ursa Minor | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 15h 06m 52.4406s[1] |
| Declination | +70° 27′ 25.151″[1] |
| Characteristics | |
| Spectral type | T6[2][3] |
| Apparent magnitude (J (2MASS filter system)) | 14.328±0.095[2] |
| Apparent magnitude (J (MKO filter system)) | 13.56±0.05[2] |
| Apparent magnitude (H (2MASS filter system)) | 14.150±0.203[2] |
| Apparent magnitude (H (MKO filter system)) | 13.91±0.04[2] |
| Apparent magnitude (KS (2MASS filter system)) | 14.048±0.136[2] |
| Astrometry | |
| Proper motion (μ) | RA: −1,194.179 mas/yr[1] Dec.: +1,042.194 mas/yr[1] |
| Parallax (π) | 193.5±0.6 mas[4] |
| Distance | 16.86 ± 0.05 ly (5.17 ± 0.02 pc) |
| Details | |
| Temperature | 952[4] K |
| Other designations | |
| WISEPC J150649.97+702736.0, WISE J1506+7027, WISE 1506+7027[2] | |
| Database references | |
| SIMBAD | data |
WISE 1506+7027 was discovered in 2011 from data collected by the Wide-field Infrared Survey Explorer (WISE) in the infrared at a wavelength of 40 cm (16 in), whose mission lasted from December 2009 to February 2011. In 2011, Kirkpatrick and colleagues published a paper in The Astrophysical Journal Supplement, where they presented the discovery of 98 new brown dwarf systems found by WISE with components of spectral types M, L, T and Y, among which was WISE 1506+7027.[2][note 1]
The first trigonometric parallax of WISE 1506+7027, which was published in 2013 by Marsh et al., is 0.310″±0.042″, corresponding to a distance of 3.4+0.7
−0.4 pc, or 11.1+2.3
−1.3 ly.[6] The Gaia spacecraft determined an updated parallax of 193.5 milliarcseconds leading to a distance of 16.85 light years.[7] WISE 1506+7027 has a large proper motion of about 1,587 milliarcseconds per year.[4]
A 2024 catalog of stars and brown dwarfs within 20 parsecs lists this object with the name "Thompson's Dwarf",[5] but this name does not appear in any other source and its origin is unclear.
Notes
- These 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)), in Mainzer et al. (2011), and Burgasser et al. (2011), and the other discoveries were published later.