9916 Kibirev

The likely S-type asteroid has a rotation period of about 15.2 hours and was named after Russian informatician Sergej Kibirev.

[1] Kibirev is an assumed S-type asteroid,[4] which is also the Koronis family's overall spectral type.

[10]: 23 In 2014, two rotational lightcurves of Kibirev were obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California.

[7][8] Lightcurve analysis gave a rotation period of 15.171 and 15.48 hours with a brightness amplitude of 0.36 and 0.45 magnitude, respectively (U=2/2).

[5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 5.49 kilometers based on an absolute magnitude of 13.47.

Orbit of Kibirev (blue) with the inner planets and Jupiter in red