Dear Colleagues, I found my first run dataset wrong. I had to correct a routine used to generate the file. Now, after the correction, the hump amplitude is around 0.4 mag, in good agreement with the one previously reported on this list. I apologize for the error. Regards, Gianluca PS: I apologize for the OT, but the comet C/1999 S4 Linear is really nice. Some images on my web site. -- *********************************************************************** * Gianluca Masi "Two things fill the soul * * Via Madonna de Loco, 47 with awe and reverence [...]: * * 03023 Ceccano (FR) the starry sky above me and * * ITALY the moral law within me" * * e-mail: gianmasi@fr.flashnet.it * * web: http://vsnet.eurolink.it/comets/ I. Kant * * Minor Planet Center Obs. Code: 470 - Ceccano * * Center for Backyard Astrophysics - Italy * * VSNET Collaboration Team member * ***********************************************************************