Porrima (gam Virgo), the bright star currently near Saturn, is one of those doubles that you can follow for a lifetime. Porrima has an orbital period of about 169 years and was at its smallest separation (0.40 arcsecs) in 2005. Sixth Orbit Catalogue of Visual Binaries orbital plot for Porrima http://ad.usno.navy.mil/wds/orb6/PNG/wds12417-0127b.png Currently, Porrima has opened to a separation of 1.7 arcsecs, and through a Meade LX200 10 inch at the UofU South Physics Building at 625 power last night, it was an attractive equal ``kissing'' double of a gold color. Porrima will gradually open to 2.3 arcsecs by 2015, and continue widen to a generous 5 arcsecs in about 80 years. When you are looking at nearby Saturn, it is worth taking a quick peak at Porrima, or showing to young people, so they can revisit it in another 20 or 30 years from now. Clear Skies - Kurt
participants (1)
-
Canopus56