SIMBAD references

Orbits of 20 visual double stars discovered by P. Couteau are computed for the first time. The observations for four of these stars, COU 384, COU 1067, COU 1681, and COU 2388, span arcs greater than or approximately equal to 180 degrees. Since the time of their discovery the stars, COU 384 and COU 2388 have already completed one revolution. COU 338, COU 567, COU 1003, COU 1607, and COU2086 have many observations within small arcs and one or two observation sat more distant positions with small separations. The orbits of the remaining stars, COU 80, COU 532, COU 543, COU 613, COU 696, COU 936, COU 1129, COU 1667, COU 1904, COU 2244 and COU 2542, are determined from observations covering small arcs 10 deg-60 deg.