MERCURY

Reaches its greatest elongation east (27° 21′), very nearly its maximum

distance from the sun; yet the opportunity for observation is not so

favorable as on many occasions when the elongation is several degrees

less. And the reason is, that the planet is now moving southward, is in

fact on the 23rd, the date of its greatest eastern elongation, 1° 16′

south, while the sun is still 11° 9′ north of the equator, and sets,

therefore, only about fifty minutes later than the sun. The time of the

planet’s setting is for the 1st, 8:07 p. m.; 15th, 7:53 p. m.; 30th, 7:16

p. m. It has a direct motion of 32° 49′ 39″. Its diameter increases 2.6″,

namely, from 5.6″ to 8.2″. It is farthest from the sun on the 20th, at

6:00 a. m. On the 23d, at 8:00 a. m., 3° 5′ south of Uranus.

The Chautauquan, Vol. 04, July 1884, No. 10 · 第 24 / 77 题