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: | 136 | ||
| First Spectrum: | JD 2458383.501500 | \ | 22 Sep 2018 00:02:09.600000 UT |
| Latest Spectrum: | JD 2461014.381059 | \ | 4 Dec 2025 21:08:43.497600 UT |