It orbits the Sun in the outer main-belt at a distance of 2.8–3.6 AU once every 5 years and 7 months (2,047 days).

[14] In May 2000, a rotational lightcurve of Martir was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory (716) in Colorado.

[12][13] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Martir measures between 34.42 and 39.969 kilometers in diameter and its surface has an albedo between 0.038 and 0.060.

[4][5][6][7][8][9][10] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0435 and a diameter of 36.69 kilometers based on an absolute magnitude of 11.2.

[2][16] The discoverer also named the asteroids 1569 Evita, 1581 Abanderada, 1588 Descamisada and 1589 Fanatica in tribute to Perón.