Abstract. Photometric observations of the asteroid 15691 Maslov, were performed with 2
m and 50/70 cm Schmidt telescopes at NAO Rozhen during the asteroid’s opposition in 2015
and 2022. Calculated colour indices suggest that 15691 Maslov belongs to the S spectral type.
The composite lightcurve shows synodic rotation period of 7.8 ± 0.2h hours and amplitude
of about 0.2 magnitudes. For calculation of the sidereal period with the lightcurve inversion
technique we used our dense photometric data in combination with the sparse data from the
AstDys2 database.
