1958 Chandra (prov. designation: 1970 SB) is a dark background asteroid from the outer region of the asteroid belt, approximately 35 kilometers (22 miles) in diameter. It was discovered on 24 September 1970, by Argentinian astronomer Carlos Cesco at the Yale–Columbia Southern Station of the Leoncito Astronomical Complex in San Juan, Argentina (also see Félix Aguilar Observatory).^[9] It was named after astrophysicist Subrahmanyan Chandrasekhar.^[2]

Chandra is a dark C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (1,997 days). Its orbit has an eccentricity of 0.17 and an inclination of 11° with respect to the ecliptic.^[1] In April 1947, the asteroid was first identified as 1947 HD at Algiers Observatory. The body's observation arc begins 16 years prior to its official discovery observation with a precovery taken at Palomar Observatory in 1954.^[9]

This minor planet was named in honor of Subrahmanyan Chandrasekhar (1910–1995), the Nobel Prize winning Indian–American theoretical astrophysicist (also see Chandrasekhar limit).^[2] The approved naming citation was published by the Minor Planet Center on 1 November 1979 (M.P.C. 5013).^[10]