We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates .
We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of \sim 12 % .
The resulting distances are 4.26 Mpc ( KKH 5 ) , 4.74 Mpc ( KK 16 ) , 4.72 Mpc ( KK 17 ) , 4.66 Mpc ( ESO 115-021 ) , 4.43 Mpc ( KKH 18 ) , 3.98 Mpc ( KK 27 ) , 4.61 Mpc ( KKH 34 ) , 4.99 Mpc ( KK 54 ) , 4.23 Mpc ( ESO 490-017 ) , 4.90 Mpc ( FG 202 ) , 5.22 Mpc ( UGC 3755 ) , 5.18 Mpc ( UGC 3974 ) , 4.51 Mpc ( KK 65 ) , 5.49 Mpc ( UGC 4115 ) , 3.78 Mpc ( NGC 2915 ) , and 5.27 Mpc ( NGC 6503 ) .
Based on distances and radial velocities of 156 nearby galaxies , we plot the local velocity-distance relation , which has a slope of H _ { 0 } = 73 km s ^ { -1 } Mpc ^ { -1 } and a radial velocity dispersion of 85 km s ^ { -1 } .
When members of the M81 and Cen A groups are removed , and distance errors are taken into account , the radial velocity dispersion drops to \sigma _ { v } = 41 km s ^ { -1 } .
The local Hubble flow within 5 Mpc exibits a significant anisotropy , with two infall peculiar velocity regions directed towards the Supergalactic poles .
However , two observed regions of outflow peculiar velocity , situated on the Supergalactic equator , are far away ( \sim 50 \degr ) from the Virgo/anti-Virgo direction , which disagrees with a spherically symmetric Virgo-centric flow .
About 63 % of galaxies within 5 Mpc belong to known compact and loose groups .
Apart from them , we found six new probable groups , consisting entirely of dwarf galaxies .