def parallaxE_dist(delta_ups, R):
    """
    Calculates the distance value of the parallax error in km

    Parameters
    ------------
    delta_ups : float
        Angular parallax error, in degrees

    R : int
        Earth's radius, in km

    Returns
    ------------
    delta_ups * R : float
        Parallax error as a distance, in km

    """
    return (delta_ups * R)