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Spectra 18 And - HD 222304 -  - mag.:5.35 - H-alpha detail

Telescope: 0.28-m  f/10 (C11 Cassegrain)

Spectroscope: LHiResIII with 2400 l/mm grating

Calibration with internal Ar/ne

Calibration RMS: 0.171 A (lin)

Resolving Power: 12711

Exposure: 6 x 600s (SNR: 133)