Hα spectrum of Epsilon Persei - HD 24760 - SAO 56840 [B1.5III]
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Eps Per is monitored in the project BRITE. There are several satellites which are doing photometric of this and other bright stars. In a ProAm cooperation, amateurs deliver spectra to allow the proffessionals to make models of pulsation of stars from the satellite and spectra data. |
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| Telescope: Celestron C11, f/10, d=280mm | Spectra with 2400 lines/mm, processed with BASS project | Download spectra (ZIP) 1D FIT: epsPer_20170101.zip |
| Spectrograph: Lhires III, 2400gr, slit 23u | Calibrated with ArNe before and after imaging, normalized flux | Download spectra (ZIP) RAW FIT (31MB): epsPer_20170101_RAW.zip |
| Camera: SBIG STT-8300M | 30 x 1 images, each 600 seconds (10 minutes) | |
| Resolution: ~0.09 Å / pixel, resolving power = 11000 | Dark corrected and stacked with PixInsight | |
| Acquisition software: SbigControl | ||
| Date: 1. Jannuary 2017, 18:32 - 00:19 UT | ||
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| Stellar data (Wikipedio.org): | ||
| Constellation: Perseus, RA: 03h 57m 51.23205s, Dec: +40° 00′ 36.7752″ | ||
| v = 2.88 mag | ||
| Rv = -1 km/s | ||
| Distance: 640 +- 30 ly, 196 +-9 pc | ||
| Mass: 13.5 +-2.0 MΘ (A), 0.85 -1.77 MΘ (B) | ||
| Radius: 7.66 RΘ (A), 1.4 +-0.4 RΘ (B) | ||
| Luninosity: 28330 LΘ | ||
| Rotational velocity ~155 +-20 km/s (A), 300 +-30 km/s (B) | ||
| Age: 15.4 +-0.6 x 10^6 years | ||
