The eruptive young star V899 Mon shows characteristics of both FUors and EXors. It reached a peak brightness in 2010, then briefly faded in 2011, followed by a second outburst....
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Stars and brown dwarfs in the sigma Orionis cluster. IV. IDS/INT and OSIRIS/GTC spect
VizieR online Data Catalogue associated with article published in journal Monthly Notices of the Royal Astronomical Society with title ' Stellar surface information from the Ca II H&K lines. II. D
