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Table 10
Correlation of magnitudes by Ulugh Beg/al-Sufi with those by Ptolemaios.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | |
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| 1 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 0 | 32 | 3 | 0 | 0 | 0 | 0 | 0 |
| 3 | 0 | 10 | 178 | 13 | 0 | 0 | 0 | 0 |
| 4 | 0 | 3 | 20 | 394 | 6 | 0 | 2 | 1 |
| 5 | 0 | 0 | 2 | 61 | 184 | 3 | 6 | 0 |
| 6 | 0 | 0 | 1 | 4 | 25 | 45 | 4 | 0 |
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| 8 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
Notes. In the machine-readable tables magnitude 7 refers to stars called faint by Ptolemaios; magnitude 8 refers to the entry for which Ulugh Beg remarks “no star is visible in that location”; magnitude 9 to entries called nebulous.
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