WISE 1217+1626
WISE 1217+1626 with the T9 labelled as A and the Y0 labelled as B Credit: NASA/ESA Hubble; Jenny Patience et al. (Processing: Meli_thev) | |
| Observation data Epoch MJD 55549.01 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12h 17m 56.96s |
| Declination | +16° 26′ 40.0″ |
Characteristics | |
| Whole system | |
| Apparent magnitude (Y (MKO) | 18.38±0.04 |
| Apparent magnitude (J (2MASS) | >18.52 |
| Apparent magnitude (J (MKO) | 17.83±0.02 |
| Apparent magnitude (H (2MASS) | >17.50 |
| Apparent magnitude (H (MKO) | 18.18±0.05 |
| Apparent magnitude (KS (2MASS) | >16.64 |
| Apparent magnitude (K (MKO) | 18.80±0.04 |
| Component A | |
| Spectral type | T8.5 |
| Apparent magnitude (Y (MKO) | 18.59±0.04 |
| Apparent magnitude (J (MKO) | 17.98±0.02 |
| Apparent magnitude (H (MKO) | 18.31±0.05 |
| Apparent magnitude (K (MKO) | 18.94±0.04 |
| Component B | |
| Spectral type | Y0-0.5 |
| Apparent magnitude (Y (MKO) | 20.26±0.04 |
| Apparent magnitude (J (MKO) | 20.08±0.03 |
| Apparent magnitude (H (MKO) | 20.51±0.06 |
| Apparent magnitude (K (MKO) | 21.10±0.12 |
| Astrometry | |
| Proper motion (μ) | RA: 754.9±1.2 mas/yr Dec.: −1249.8±1.8 mas/yr |
| Parallax (π) | 107.4±3.5 mas |
| Distance | 30.4 ± 1.0 ly (9.3 ± 0.3 pc) |
| Orbit | |
| Primary | A |
| Companion | B |
| Period (P) | 130+230 −30 yr |
| Details | |
| Component A | |
| Mass | 30 MJup |
| Luminosity (bolometric) | 10−5.95 ± 0.18 L☉ |
| Surface gravity (log g) | 5.07±0.05 cgs |
| Temperature | 575±25 K |
| Age | 6±2 Gyr |
| Component B | |
| Mass | 22 MJup |
| Luminosity (bolometric) | 10−6.79 ± 0.18 L☉ |
| Surface gravity (log g) | 4.77±0.05 cgs |
| Temperature | 450±50 K |
| Position (relative to A) | |
| Component | B |
| Epoch of observation | UT 2012 January 29 |
| Angular distance | 758.2±1.4 mas |
| Position angle | 14.50±0.13° |
| Projected separation | ~ 8 AU |
| Other designations | |
| WISEPC J121756.91+162640.2 WISE J1217+1626 WISE 1217+1626 WISE J1217+1626AB, WISE J121756.90+162640.8 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WISEPC J121756.91+162640.2 (designation abbreviated to WISE 1217+1626, or WISE J1217+1626) is a binary brown dwarf system of spectral classes T9 + Y0, located in constellation Coma Berenices at approximately 30.4 light-years from Earth.