  We present the results of the photometric and spectrophotometric properties
of the 67P/Churyumov-Gerasimenko nucleus derived with the OSIRIS instrument
during the closest fly-by over the comet, which took place on 14 th February
2015 at a distance of {\~} 6 km from the surface. Several images covering the
0{\deg}-33{\deg} phase angle range were acquired, and the spatial resolution
achieved was 11 cm/pxl. The flown-by region is located on the big lobe of the
comet, near the borders of the Ash, Apis and Imhotep regions. Our analysis
shows that this region features local heterogeneities at the decimetre scale.
We observed difference of reflectance up to 40{\%} between bright spots and
sombre regions, and spectral slope variations up to 50{\%}. The spectral
reddening effect observed globally on the comet surface by Fornasier et al.
(2015) is also observed locally on this region, but with a less steep
behaviour. We note that numerous metre-sized boulders, which exhibit a smaller
opposition effect, also appear spectrally redder than their surroundings. In
this region, we found no evidence linking observed bright spots to exposed
water-ice-rich material. We fitted our dataset using the Hapke 2008 photometric
model. The region overflown is globally as dark as the whole nucleus (geometric
albedo of 6.8{\%}) and it has a high porosity value in the uppermost-layers
(86{\%}). These results of the photometric analysis at a decimetre scale
indicate that the photometric properties of the flown-by region are similar to
those previously found for the whole nucleus.
