Equatorial coordinate sky map in the Hammer equal-area projection of brown dwarfs at <6.5 pc. Same symbols as in Fig. 1. The Galactic plane (with b = ± 20 deg parallels) and its orthogonal plane along l = 0 deg are represented by the red and blue lines, while the Galactic centre and the direction of Galactic rotation are indicated by the green and blue filled circles, respectively. The region that is particularly void of brown dwarfs is above the blue line (l ~ 0−180 deg). The solar apex and antapex are indicated by green and yellow crosses. The path of the Sun (ecliptic) with β = ± 20 deg parallels are represented by the grey lines. The month (approximate mid-month date) of optimal night visibility from observatories such as at Mauna Kea or Cerro Paranal for each emphasized sky location on the ecliptic are indicated.