JAumente

Bonjour à tous. I share spectra profiles obtained on December 12nd in Córdoba (Spain) of the star Betelgeuse (Alf Ori) during the occultation by the asteroid Leona. In these latitudes we were lucky that the occultation was nearly complete during the brief seconds it lasted. I also attach video of the event. HW & SW used: - AZ Gti SkyWatcher mount, Mak127 telescope, Star Analyser 100, ASI178mm. - SharpCap 4.1., RSpec 2.1.1. Saludos.

Superb!!!👏👏👏

Bonjour Jean-François: A superb image!!!! A brief question: What attenuating filter are you using to reduce solar radiation in front of your Bresser 127/1200 mm telescope? Regards. Jose.

Superb!!!!

New images. These from last March 12, in Halpha and doppler, and with better seeing conditions.... Greetings.

Thank you very much for your comments! Banjo, it would be an honor to be able to comment in French, but my level is insufficient to do so. I also consider inappropriate to use Google Translate to put my comments in French, and then it translates in any way. My language is Spanish, but logically I have preferred to participate in English because I have an admissible level to do it. I sincerely hope this is not a problem... Regards.

Bonjour a tous! This is my first post on Astrosurf. It is a real pleasure to participate in this forum and learn from all of you! I share my photos taken with Solex from Córdoba in Spain (all are single images). My configuration: Acuter Maksy60 tube + ND4 filter + Sol'ex + Asi178mm. Obviously, with this configuration I am forced to perform two scans for each half disk scanned and then generate a mosaic. I am also collaborating in the Pro-Am Cospam project (the associated images were also upload in BASS2000 via ftp) . I thank Olivier Aguerre for advising me on the procedure to generate the mosaics in accordance with the protocol established for the project. ....And of course, very especially Christian and Valerie! for this fantastic project and their efforts to motivate amateur astronomers in the exciting field of spectroscopy.

Spectacular images!! Christian, could you shed some light on how to get to that calculation of ejection velocities (in this case at least 140 km/s)? I am a beginner in the subject and I find astrophysics immersed in images fascinating.