PDS 110 is a young 11th magnitude star located approximately 1,090 light-years (335 pc)[2] away in the constellation Orion. In 2017, it was discovered that the star is orbited by an exoplanet or brown dwarf with a disk of dust around it.
PDS 110 Credit: Two Micron All Sky Survey (2MASS) | |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Orion |
Right ascension | 05h 23m 31.008s |
Declination | –01° 04′ 23.68″ |
Apparent magnitude (V) | 10.4 |
Characteristics | |
Spectral type | keF6IVeb[1][2] |
Astrometry | |
Proper motion (μ) | RA: 1.146 ± 1.067[2] mas/yr Dec.: −0.338 ± 1.076[2] mas/yr |
Parallax (π) | 2.91 ± 0.34 mas[2] |
Distance | 1035[2] ly (335[2] pc) |
Absolute magnitude (MV) | +2.54[2] |
Details | |
Mass | 3.0[3] M☉ |
Radius | 2.23[2] R☉ |
Luminosity (bolometric) | 7.76[2] L☉ |
Surface gravity (log g) | 3.8[2] cgs |
Temperature | 6,653[3] K |
Metallicity [Fe/H] | +0.06[2] dex |
Age | 10[3] Myr |
Other designations | |
Database references | |
SIMBAD | data |
PDS 110 is a young star still approaching the main sequence. It has been classified as a T Tauri star,[4] or as a pre-main sequence star.[3] The emission lines indicative of a T Tauri classification are somewhat weaker than a typical T Tauri star, interpreted as a post-T Tauri stage.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.8-70 MJ | 2 | 808 ± 2 | — | — | — |
Brightness measurements from SuperWASP and KELT showed two similar reductions in brightness in November 2008 and January 2011, both with a maximal luminosity reduction of 30% and a duration of 25 days. These events were interpreted as transits of a structure with a period of 808 ± 2 days, corresponding to an orbital distance of about 2 AU. The large reduction in brightness could have happened due to a planet or brown dwarf with a circum-secondary disk of dust with a radius of 0.3 AU around a central object with a mass between 1.8 and 70 times the mass of Jupiter. Another transit was predicted for September 2017,[2] but nothing similar to the previous events was seen, ruling out a periodic event.[5]