Makes an advance movement of 22′ 30″, presenting a diameter of 3.7″. Is
evening star during the month, setting at the following times: On the 2nd
at 1:07 a. m.; on the 16th at 12:12 a. m.; and on the 30th at 11:14 p. m.
On the 14th at 3:00 p. m., is 90° east of the sun; on the 1st at 3:54 p.
m., is 3° 21′ north of the moon, and again on the 28th at 11:42 p. m., 3°
21′ north of the moon.
One of the odd things in astronomy is the story of the satellites of
Uranus. In a work published as recently as 1852, we are gravely told that
Uranus “is attended by _six_ moons or satellites, which revolve about
him in different periods, and at various distances. Four of them were
discovered by Dr. Herschel and two by his sister, Caroline Herschel,
with the promise of more to be discovered;” and then we are given their
distances from the planet, and also their times of revolution, which
vary from 224,000 to 1,556,000 miles as to distance, and from five days,
twenty-one hours, twenty-five minutes, twenty seconds to one hundred and
seven days, sixteen hours, thirty-nine minutes, fifty-six seconds, as
to times of revolution. But now we are told Herschel’s “satellites have
been sought for in vain, both with Mr. Lassell’s great reflectors and
with the Washington twenty-six inch refractor, all of which are optically
more powerful than the telescopes of Herschel. There may be additional
satellites which have not yet been discovered; but if so, they must
have been too faint to have been recognized by Herschel.” Our latest
information on this subject gives four satellites named Ariel, Umbriel,
Titania, Oberon, in order outwardly from the planet, and their periodic
times, respectively, 2.52, 4.14, 8.7, and 13.46 days; the credit of
discovering the two outer ones being given to Herschel and that of the
two inner being divided between Mr. Lassell and Mr. Struve.