Results of infrared photometric observations of RW LMi in the JHKLM bands are presented. The observations were carried out from 1994 to 2024. Based on the observations of 17 pulsation cycles of the star, new brightness ephemerides were established: JD₌₀ₗ=2459677d. 0+610d. 9\, E. A sinusoidal trend of the average brightness level was found. Its period is about 7300 days and its amplitude is approximately 1^m in the JHK bands. From the energy distribution in the spectrum in the wavelength range of 0. 5–100 m, an estimate of the bolometric flux at the maximum brightness was obtained: F₁₎₋=2. 6 10^-6 erg s ^-1 cm ^-2. This corresponds to the luminosity L₌₀ₗ 8500\;L_. Modeling the RW LMi circumstellar envelope radiation was performed with the RAMDC-3D program. The simulation was carried out in the approximation of a spherically symmetric envelope shape with a constant mass-loss rate. The main envelope parameters are: the optical depth ₕ 12. 7, the inner radius R₈₍ 8 AU, the outer radius R₎ₔₓ 17\, 000 AU, and the mass-loss rate Ṁ=6 10^-6M_ yr ^-1.
Vakhonin et al. (Sun,) studied this question.