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: | 174 | ||
| First Spectrum: | JD 2458383.501500 | \ | 22 Sep 2018 00:02:09.600000 UT |
| Latest Spectrum: | JD 2461061.691944 | \ | 21 Jan 2026 04:36:23.961600 UT |