LSR J1835+3259
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 35m 37.902s |
| Declination | +32° 59′ 54.59″ |
| Characteristics | |
| Spectral type | M8.5 |
| Apparent magnitude (V (USNO filter system)) | 18.27 ± 0.03 |
| Apparent magnitude (I (USNO filter system)) | 13.46 ± 0.02 |
| Apparent magnitude (z (USNO filter system)) | 12.63 ± 0.02 |
| Apparent magnitude (J (2MASS filter system)) | 10.27 ± 0.03 |
| Apparent magnitude (H (2MASS filter system)) | 9.58 ± 0.05 |
| Apparent magnitude (Ks (2MASS filter system)) | 9.15 ± 0.04 |
| Astrometry | |
| Radial velocity (Rv) | -10 ± 40 km/s |
| Proper motion (μ) | RA: −72.650±0.047 mas/yr Dec.: −755.146±0.052 mas/yr |
| Parallax (π) | 175.7930±0.0468 mas |
| Distance | 18.553 ± 0.005 ly (5.689 ± 0.002 pc) |
| Details | |
| Mass | 55 ± 4 MJup |
| Radius | 2.1 ± 0.1 RJup |
| Surface gravity (log g) | 4.5 ± 0.05 cgs |
| Temperature | 2800 ± 30 K |
| Age | 22 ± 4 Myr |
| Other designations | |
| 2MASSI J1835379+325954, 2MASS 1835+32, 2MASS J18353790+3259545, LSR 1835+3259, 2MUCD 11792, [B2006] J183537.9+325955, LSPM J1835+3259, USNO-B1.0 1229-00376318 | |
| Database references | |
| SIMBAD | data |
Location of LSR J1835+3259 in the constellation Lyra | |
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LSR J1835+3259 is a nearby ultracool dwarf of spectral class M8.5, located in constellation Lyra, the discovery of which was published in 2003. Previously it was concluded that this star is a young brown dwarf, but no lithium absorption lines are detected for this object, which is a strong indicator for young brown dwarfs that need 10–100 million years to deplete lithium.