Binary star system in the constellation of Taurus
 ;indicator name="01-sky-coordinates" ; ;templatestyles src="Template:Sky/styles.css" / ;Coordinates: &amp;de=24.351626250000002&amp;zoom=&amp;show_grid=1&amp;show_constellation_lines=1&amp;show_constellation_boundaries=1&amp;show_const_names=1&amp;show_galaxies=1&amp;img_source=IMG_all 04h 33m 34.5627s, +24° 21′ 05.8545″ ;/indicator ;
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! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000      Equinox J2000
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:center" colspan="2" | GK Tauri
! style="text-align:left" | Evolutionary stage
! style="text-align:left" | Spectral type
! style="text-align:left" | Apparent magnitude (G)
! style="text-align:left" | Variable type
! style="text-align:center" colspan="2" | GI Tauri
! style="text-align:left" | Apparent magnitude (G)
 ;/th ; ;/tr ;
! style="background-color: #FFFFC0; text-align: center;" colspan="2" | Position (relative to GK Tauri)
 ;/th ; ;/tr ;
GK Tauri is a young T Tauri-type pre-main sequence star in the constellation of Taurus about away, belonging to the Taurus Molecular Cloud.
System.
The stars GK Tauri and GI Tauri form a wide binary system, with the projected separation between components being 1700 AU. The secondary component's orbit is not very eccentric, with a periastron of at least 890 AU.
GK Tauri was originally believed to have a close stellar companion WDS J04336+2421Ab. However, it was found to be an unrelated background star according to "Gaia" data.
Properties.
Both members of the binary system are medium-mass objects still contracting towards the main sequence and accreting mass, with the primary GK Tauri being close to entering the main sequence.
Protoplanetary system.
Both stars are surrounded by compact protoplanetary disks, although the reason for the small disk sizes is not clear. GK Tauri's spectrum indicates a possible gap in the protoplanetary disk and a planet orbiting within the gap, with a semimajor axis of 2.4 AU.
! align=center| Companion
! align=center| Mass
! align=center| Semimajor axis
! align=center| Orbital period
! align=center| Eccentricity
! align=center| Inclination
! align=center| Radius
! align=center| Companion
! align=center| Mass
! align=center| Semimajor axis
! align=center| Orbital period
! align=center| Eccentricity
! align=center| Inclination
! align=center| Radius
References.
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