[6][10][a] Analysis of the best-rated lightcurve from March 2003, during which a satellite was also discovered (see below), gave a rotation period of 2.9227 hours with a brightness amplitude of 0.19 and 0.20 magnitude (U=3/3).
[3][6][a] According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Tatianina measures between 3.282 and 3.475 kilometers in diameter and its surface has an exceptionally high albedo of 0.4763 to 0.514.
[7][8][9] The Collaborative Asteroid Lightcurve Link adopts the revised WISE-data by Petr Pravec, that is an albedo of 0.4763 and rounded diameter of 3.48 kilometers based on an absolute magnitude of 13.718.
[3] During the photometric observations by Donald Pray, Petr Pravec and collaborators in March 2006, it was revealed that Tatianina is a synchronous binary asteroid with a minor-planet moon orbiting it every 21.67 hours at an estimated average distance of 6.6 km.
[6] The mutual occultation events suggest the presence of a satellite with an estimated diameter of 610±10 meters or 19% the size of its primary.