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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: | Ηνίοχος |
| Right ascension: | 05h11m42.14s |
| Declination: | +46°56'32.2" |
| Apparent magnitude: | 7.837 |
| Distance: | 314.465 parsecs |
| Proper motion RA: | -1.8 |
| Proper motion Dec: | -1.8 |
| B-T magnitude: | 7.927 |
| V-T magnitude: | 7.845 |
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