HIP 21539 is not a past very close neighbour of the Sun F. Crifo, C. Soubiran, G. Jasniewicz, D. Katz, P. Sartoretti and P. Panuzzo A&A, 601 (2017) L6 Published online: 11 May 2017 DOI: 10.1051/0004-6361/201730521