error CS0029: Cannot implicitly convert type 'float' to 'UnityEngine.Vector3'

Assets\Scripts\ControlaJogador.cs(43,34): error CS0029: Cannot implicitly convert type 'float' to 'UnityEngine.Vector3'

void FixedUpdate()
{
    GetComponent<Rigidbody>().MovePosition
        (GetComponent<Rigidbody>().position + 
        (direcao * Velocidade * Time.deltaTime));

    Ray raio = Camera.main.ScreenPointToRay(Input.mousePosition);

    Debug.DrawRay(raio.origin, raio.direction * 100, Color.red);

    RaycastHit impacto;

    if(Physics.Raycast(raio, out impacto, 100))
    {
        Vector3 posicaoMiraJogador = posicaoMiraJogador = impacto.point - transform.position;
        posicaoMiraJogador = transform.position.y;

        Quaternion novaRotacao = Quaternion.LookRotation(posicaoMiraJogador);

        GetComponent<Rigidbody>().MoveRotation(novaRotacao);
    }
}