Multiple Binary System with 5 stars in constellation of Velorum. Because of precession (the 26,000-year wobble of the Earth's axis), Delta Vel will be a South Pole star around 9000 AD.
http://www.vs-compas.belastro.net/bu...ticle/3-14.pdf
http://stars.astro.illinois.edu/sow/deltavel.html
ftp://ftp.eso.org/pub/general/vltiws...-AKellerer.pdf
The system consists of 2 groups
1º group:
A and Aa - discovered in the year 2000 by eclipsing binary - spectroscopic binary with orbit around 45.15 days, distant of 0.5 UA.
A and B - separation of 0,6 arcsec to 2 arcsec (eliptic orbit), orbit period of 142 years and distant of 49 UA.
Star A: magnitude 1.97
Star B: magnitude 5.55
2º group:
C - D separation of 6 arcosec and 70 arcosec from the first group, with period of orbit around 2 thousands years.
C - probably class M red Dwarf, magnitude 11
D - probably class M red Dwarf, magnitude 13.5
GSO 305 mm - Canon T3 - ISO 1600 - 6 x 15 seg (90 segundos) - OAG - Skyglow Filter - Coma Corrector
http://www.astrobin.com/173134/
