Nature June 15th 1876
The double star gamma Centauri
Will one of our southern readers put upon record the actual
angle of position and distance of this object, to decide upon the direction and
amount of motion which at present are by no means obvious?
Capt. Jacobs’ measures in December 1857 showed that the star
was widening as compared to his estimates in March of the preceding year, but
he found a retrograde change of angle to the amount of 7 degrees, whereas the
angle of 1856 compared with Sir John Herschel’s measures of 1835-36, rather
point to direct motion.
Capt. Jacobs says in 1857, “Has opened sensibly since 1853,
being now an easy object, whereas then under the most favourable circumstances
it could only just be discerned as not round”
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