... 3-space motion of U , V, W (where positive U is in the direction of the Galacticcenter) of -34.1 ± 1.6, -24.4 ± 2.2, 8.1 ± 1.3 ... 2010); Cutri et al. (2012); 7=Zacharias et al. (2004) a Positive U is in the direction of the GalacticCenter. ...
... of anthropogenic light, the radiance of a relatively large patch of sky near zenith on moon-free nights is likely to have been nearly always within the range 20 (galacticcenter near zenith) to 24 mag/arcsec2 (very thick clouds), or 0.14.3 NSU ...