Density of stars with proper motions centred around (μαcosδ,μδ) = (−5, −5) mas/yr with a radius of 15 mas/yr. Top: in 2MAst HQb5, bottom: in UCAC4 HQ. Sky pixels are 0.25 × 0.25 deg2 in a projection of αcosδ,δ (north is up, α increases from left to right). In the darkest sky areas, there are slightly more than 1400 objects per pixel in 2MAst HQb5 and 1000 in UCAC4 HQ. Open circles mark the positions of the open cluster NGC 188, the globular cluster NGC 5272 (M 3), the open cluster NGC 2682 (M 67), and the globular cluster NGC 5139 (ω Cen) (from north to south), also shown in the zoomed images at the corners. The Magellanic Clouds are also marked.
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