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The determination of the zero point of the wavelength scale on stellar spectrograms
A novel method for determining the zero point of the wavelength scale(lambda0) on low-spectral-resolution spectrograms obtainedwith an objective plasma is presented. The method was applied to a groupof 100 stars belonging to the B-G spectral classes. Near-UV spectrogramsof these stars were obtained by the Orion-2 space observatory.Equivalent widths were obtained for the resonance doublet of Mg II 2800A in the spectra of the stars studied.
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Observation and Astrometry data
| Constellation: | Cocher |
| Right ascension: | 05h22m24.30s |
| Declination: | +45°49'54.9" |
| Apparent magnitude: | 9.166 |
| Proper motion RA: | 5.6 |
| Proper motion Dec: | -4.4 |
| B-T magnitude: | 9.318 |
| V-T magnitude: | 9.179 |
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