Short-term variability of comet C/2012 S1 (ISON) at 4.8 AU from the Sun P. Santos-Sanz, J. L. Ortiz, N. Morales, R. Duffard, F. Pozuelos, F. Moreno and E. Fernández-Valenzuela A&A, 575 (2015) A52 Published online: 20 February 2015 DOI: 10.1051/0004-6361/201425265