Supporting amateur astronomers since 1890
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British Astronomical Association Supporting amateur astronomers since 1890 |
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| X Per: X-ray Binary Star | |||
| Total Number of Spectra: | 227 | ||
| First Spectrum: | JD 2458383.501500 | \ | 22 Sep 2018 00:02:09.600000 UT |
| Latest Spectrum: | JD 2461346.513131 | \ | 2 Nov 2026 00:18:54.518400 UT |
| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 43 | 12 | 7 | 14 | 4 | 0 | 0 | 0 | 0 | 2 | 3 | 1 | 0 |
| 2025 | 68 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 7 | 25 | 13 | 19 |
| 2024 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2023 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2022 | 4 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2021 | 9 | 1 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
| 2020 | 26 | 9 | 4 | 5 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 1 | 3 |
| 2019 | 34 | 6 | 9 | 5 | 0 | 0 | 0 | 0 | 1 | 3 | 5 | 3 | 2 |
| 2018 | 41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 22 | 13 | 1 |