Ida's reflection spectrum was measured on 16 September 1980 by astronomers David J. Tholen and Edward F. Tedesco as part of the eight-color asteroid survey (ECAS).
Spektrum refleksi Ida diukur pada 16 September 1980 oleh astronom David J. Tholen dan Edward F. Tedesco sebagai bagian dari survey asteroid delapan warna (ECAS).