GV Tauri
# GV Tauri

GK Tauri is a young binary system composed of T Tauri-type pre-main sequence stars in the constellation of Taurus about 466 light years away, belonging to the Taurus Molecular Cloud.

## System

The stars GV Tauri A (GV Tauri S) and G Tauri B (GV Tauri N) form a wide binary system, with the projected separation between components being 170 AU. Both are strongly shrouded by circumstellar dust - GV Tauri A by 30 magnitudes and the GV Tauri B up to 59 magnitudes in the V band. Both components are suspected to be binaries themselves, as they produce strongly ionized jets and molecular outflows.

## Properties

Both members of the binary system are medium-mass objects still contracting towards the main sequence and accreting mass, although accretion rates remain highly uncertain as of 2009.

## Protoplanetary system

Both stars are surrounded by protoplanetary disks, with the observable dust in each being about $5×10^{−5}$ $M_☉,$ and the gas about 0.005 $M_☉.$ The disk of GV Tauri B is rich in carbon monoxide, hydrogen cyanide and, unusually, methane.

The GV Tauri A planetary system :

| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
| - | - | - | - | - | - | - |
| protoplanetary disk | 0–17 AU | 0–17 AU | 0–17 AU | 0–17 AU | 65±5° | — |

The GV Tauri B planetary system :

| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
| - | - | - | - | - | - | - |
| protoplanetary disk | 20 AU | 20 AU | 20 AU | 20 AU | 30 or 80±10° | — |
