by Anthony Ayiomamitis
An impressive and tight binary system is Mesarthim (gamma Ari / γ-Ari) which shine at mag 3.88 and whose very close binary member at mag 4.8. The former has a luminosity 49.5 times that of the Sun and is approximately 204 light-years away.
Technical Details:
Date: Nov 21, 2009 @ 21:25 - 22:10 UT+2
Location: Athens, Greece (38.2997° N, 23.7430° E)
Equipment: AP 160/f7.5 Starfire EDF, AP 1200GTO GEM, SBIG ST-2000XM, SBIG CFW-8A, SBIG LRGB + IR-block
Integrations: LRGB @ 10:10:10:10 using 1-/2-min subs, Binning: 1x1, Image Scale: 1.27" per pixel, +0.0° C
Further Details: http://www.perseus.gr/Astro-Star-Brightest-Ari-Gamma.htm