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| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 41m 16.809s |
| Declination | +28° 39′ 59.99″ |
| Apparent magnitude (V) | 14.9 |
| Distance | ~420 ly (~130 pc) |
| Other designations | |
| CoKu Tauri/4, CoKu Tau-Aur Star 4, HBC 421, 2MASS J04411681+2840000 | |
| Database references | |
| SIMBAD | data |
CoKu Tau/4 is a pre-main-sequencebinaryT Tauri star system in the constellationTaurus. The stars are surrounded by acircumbinary disc with a central cavity of radius 10astronomical units. Before its binary nature was known, the central cavity in the system's disc was thought to have been cleared out bya planet of at least 10Jupiter masses, a rare example of a so-called "transitional disc". This model was disproven in 2008 when the star was resolved usingadaptive optics as a system of two near-equal-mass stars with aprojected separation of 8 AU. The central cavity is thus cleared out by the stars, not by the gravitational influence of a planet.
 | This binary or multiple star system–related article is astub. You can help Wikipedia byexpanding it. |
