9 lines
692 B
Markdown
9 lines
692 B
Markdown
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name: δ Her
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constellation: Her
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created_by: editor.cs
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created_date: 2023-11-07 09:40:50.816728
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updated_by: editor.cs
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updated_date: 2023-11-07 09:40:50.816732
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---
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A well-known optical double star, whose pale blue components exhibit completely different proper motions, resulting in a relatively significant change in their mutual position over time. In 1830, their mutual separation was 26", but by 1960 they had approached each other to a distance of only 9", and since then their separation has gradually increased again. The primary star has a magnitude of 3.1 and the companion has a magnitude of 8.2. To resolve this rare pair, a telescope with a 6 cm objective diameter will suffice. |