CFBDSIR J145829+101343
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 58m 29.0s |
| Declination | 10° 13′ 43″ |
| Characteristics | |
| Whole system (MKO filter system) | |
| Apparent magnitude (Y) | 20.58 ± 0.21 |
| Apparent magnitude (J) | 19.67 ± 0.02 |
| Apparent magnitude (H) | 20.06 ± 0.10 |
| Apparent magnitude (K) | 20.50 ± 0.24 |
| Component A (MKO filter system) | |
| Spectral type | T9 |
| Apparent magnitude (Y) | 20.81 ± 0.21 |
| Apparent magnitude (J) | 19.83 ± 0.02 |
| Apparent magnitude (H) | 20.18 ± 0.10 |
| Apparent magnitude (K) | 20.63 ± 0.24 |
| Component B (MKO filter system) | |
| Spectral type | Y0V |
| Apparent magnitude (Y) | 22.36 ± 0.24 |
| Apparent magnitude (J) | 21.85 ± 0.06 |
| Apparent magnitude (H) | 22.51 ± 0.16 |
| Apparent magnitude (K) | 22.83 ± 0.30 |
| Astrometry | |
| Proper motion (μ) | RA: 174.0 ± 2.0 mas/yr Dec.: −381.8 ± 2.7 mas/yr |
| Parallax (π) | 31.3±2.5 mas |
| Distance | 104 ± 8 ly (32 ± 3 pc) |
| Orbit | |
| Primary | A |
| Companion | B |
| Period (P) | 20+17 −6—35+28 −10 yr |
| Details | |
| Component A | |
| Mass | (11.1 ± 0.7)—(36 ± 4) MJup |
| Radius | 0.15 R☉ |
| Luminosity (bolometric) | 10−5.72 ± 0.13 L☉ |
| Surface gravity (log g) | (4.37 ± 0.03)—(5.06 ± 0.07) cgs |
| Temperature | (479 ± 20)—(605 ± 55) K |
| Component B | |
| Mass | 6–15 MJup |
| Radius | 0.13 R☉ |
| Luminosity (bolometric) | 10−6.53 ± 0.13 L☉ |
| Surface gravity (log g) | (4.10 ± 0.10)—(4.69 ± 0.03) cgs |
| Temperature | 370 ± 40 K |
| Position (relative to A) | |
| Component | B |
| Epoch of observation | UT 2012 April 13 |
| Angular distance | 127.2 ± 1.4 mas |
| Position angle | 318.1 ± 1.1° |
| Projected separation | 4.06 AU |
| Other designations | |
| CFBDSIR J1458+1013 CFBDS 1458 CFBDS J145829+101343 WISEPA J145829.35+101341.8 WISE J145829.40+101341.7 | |
| Database references | |
| SIMBAD | data |
CFBDSIR J145829+101343 (designation abbreviated to CFBDSIR 1458+10, or CFBDSIR J1458+1013) is a binary system of two brown dwarfs of spectral classes T9 + Y0 orbiting each other, located in constellation Boötes about 104 light-years away from Earth.
The smaller companion, CFBDSIR 1458+10B, has a surface temperature of approx 370 K (≈100 °C). It used to be known as the coolest known brown dwarf until the discovery of WISE 1828+2650 in August 2011.