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High-resolution echelle spectra taken with the 6-m telescope in 2003-2011 areused to study features of the optical spectrum and the velocity field in theatmosphere of the semiregular variable LN Hya in detail. The weak symmetricphotospheric absorptions indicate radial velocity variations from night tonight (by as much as 3 km/s), resulting from small pulsations. Peculiaritiesand profile variations were found for strong lines of FeI, FeII, BaII, SiII,etc. The profiles of these lines were asymmetric: their short-wave wings wereextended and their cores were either split or distorted by emission. During the2010 observing season, the position and depth of the Halpha absorptioncomponent, the intensities of the short and long-wave emission components, andthe intensity ratio of the latter components varied from spectrum to spectrum.Weak emissions of neutral atoms (VI, MnI, CoI, NiI, FeI) appeared in thespectrum of June 1, 2010. All these spectral peculiarities, recorded for thefirst time, suggest that we have detected rapid changes in the physicalconditions in the upper atmospheric layers of LN Hya in 2010.

High-latitude supergiants: anomalies in the spectrum of LN Hya in 2010