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Table 19
Overview of variable stars. Percentages were calculated over the total variable stars.
| Stars | G < 20 mag | Grvs < 17 mag | Grvs < 12 mag |
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| Single variable stars | 24.52% | 25.79% | 28.39% |
| Variable stars in multiple systems | 75.48% | 74.21% | 71.61% |
| ⇒ In binary systems | 55.74% | 52.65% | 38.49% |
| ⇒ Others (ternary, etc.) | 19.73% | 21.55% | 33.12% |
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| Total variable stars | 28 000 000 | 19 000 000 | 2 700 000 |
| Individually observable | 21 500 000 | 16 000 000 | 2 000 000 |
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| With planets | 2.09% | 2.64% | 2.09% |
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