vdB 100, IC 4593, B 40; Scorpius 
Astro-Physics 305mm f/3.8 Riccardi-Honders astrograph 
KAF-16803 FLI Proline 
Total Exposure Time: 5.3 hours LRGB 170:50:50:50 min, RGB 2x2 binned 
June 2013; Inkom, ID 
Comments: vdB 122 is 14 arcmin, moderate bightness, moderately blue and illuminated by star BD -19 4333. vdB 100 is the blue reflection nebula surrounding NU Sco, whereas IC 4593 is the more peripheral reflection nebula.