Sagittarius

WDS TOB 272 – Triple Star System in Sagittarius

• Lower left, 8th magnitude star ‘A’: [18 14 44.69, -18 46 59.2]
• Middle, 10th magnitude star ‘B’: [18 14 43.62, -18 46 35.5]
• Upper right, 11th magnitude star ‘C’: [18 14 43.00, -18 46 18.3]

For pair AB:

• WDS lists separation = 28.8 arc seconds, position angle = 330 degrees
• I calculate separation  = 28.15 arc seconds, position angle = 327 degrees

For pair BC:

• WDS lists separation = 18.3 arc seconds, position angle = 324 degrees
• I calculate separation = 19.3 arc seconds, position angle = 333 degrees