Contents: Brightness variability of carrier rockets; Period of rotation of the carrier rocket of the third Soviet satellite; Methods of photometry of artificial earth satellites.

Contents: Determining the scale of astrophotographs and the angular velocity of a fast-moving celestial body Modification and study of the shutter of the NAFA 3c/25 camera at Kharkov Observations of satellites with a TZK telescope fitted with a camera for photographing readings An instrument for recording the brightness of a satellite and determining the period of change The period of change of brightness of the rocket of the theird Soviet artificial earth satellite from observations at the Sofia Astronomical Observatory The results of photographic observations of artificial earth satellites Engelhardt Astronomical Observatory, Kazan Tashkent Astronomical Observatory of the Academy of Sciences of the Uzbek SSR.