Half-hours with the Telescope - Being a Popular Guide to the Use of the Telescope as a - Means of Amusement and Instruction. by Richard Anthony Proctor
page 76 of 115 (66%)
page 76 of 115 (66%)
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[epsilon] Pegasi, some 40° above the horizon. This star is a wide but
not easy double, the secondary being only of the ninth magnitude; its colour is lilac, that of the primary being yellow. Towards the right of [epsilon] Pegasi and lower down are seen the three fourth-magnitude stars which mark the constellation Equuleus. Of these the lowest is [alpha], to the right of which lies [epsilon] Equulei, a fifth-magnitude star, really triple, but seen as a double star with ordinary telescopes (Plate 5). The distance between the components is nearly 11", their colours white and blue, their magnitudes 5-1/2 and 7-1/2. The primary is a very close double, which appears, however, to be opening out rather rapidly. Immediately below Equuleus are the stars [alpha]^{1} and [alpha]^2 Capricorni, seen as a naked-eye double to the right of and above [beta]. Both [alpha]^1 and [alpha]^2 are yellow; [alpha]^2 is of the 3rd, [alpha]^1 of the 4th magnitude; in a good telescope five stars are seen, the other three being blue, ash-coloured, and lilac. The star [beta] Capricorni is also a wide double, the components yellow and blue, with many telescopic companions. To the right of Equuleus, towards the west-south-west is the constellation Delphinus. The upper left-hand star of the rhombus of stars forming the head of the Delphinus is the star [gamma] Delphini, a rather easy double (see Plate 5), the components being nearly 12" apart, their magnitudes 4 and 7, their colours golden yellow and flushed grey. Turn we next to the charming double Albireo, on the beak of Cygnus, about 36° above the horizon towards the west. The components are 34-1/2" apart, their magnitudes 3 and 6, their colours orange-yellow, and blue. |
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