Nature August 12th 1875
The Binary star 4 Aquarius
If good measures if this stars are practicable during the
present season, an idea of the form of the orbit may perhaps be obtained.
Dawes’s series of epochs will be material service in this respect; without
them, doubt might have been occasioned by the two discordant epochs of Madler,
which may have been owing to distorted images at low altitude.
The object is certainly one of considerable difficulty, and
really trustworthy measures are perhaps only to be expected from practised
observers in command of instruments of excellent definition. In Barclay’s
second catalogue it is described as just elongated in the direction 144
degrees, with power of 450 on the 10 inch refractor at Leyton at th epoch
1865.74; this angle shows direct progress, very much in accordance with Dawes’s
measures. Possibly the companion may now be found nearly due south of the primary.
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