| Minorplanet: | yes |
| 1189 Terentia | |
| Background: |
|
| Discovered: | 17 September 1930 |
| Mpc Name: | (1189) Terentia |
| Alt Names: | 1930 SG A915 TJ |
| Named After: | Lidiya Terent'eva |
| Epoch: | 4 September 2017 (JD 2458000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 101.46 yr (37,057 days) |
| Perihelion: | 2.5914 AU |
| Semimajor: | 2.9298 AU |
| Eccentricity: | 0.1155 |
| Period: | 5.01 yr (1,832 days) |
| Mean Motion: | / day |
| Inclination: | 9.8671° |
| Asc Node: | 275.24° |
| Arg Peri: | 95.571° |
| Dimensions: | km km 55.94 km km km km km km |
| Rotation: | h h |
| Albedo: | 0.0619 |
| Abs Magnitude: | 9.809.99.9610.00 |
1189 Terentia, provisional designation, is a carbonaceous Terentian asteroid from the outer regions of the asteroid belt, approximately 56 kilometers in diameter and the namesake of its family. The asteroid was discovered by Russian astronomer Grigory Neujmin at Simeiz Observatory on 17 September 1930.
Terentia is the namesake of the Terentia family, a small asteroid family of less than a hundred known members of a carbonaceous C-type composition orbiting in the outer main-belt.
Terentia orbits the Sun at a distance of 2.6–3.3 AU once every 5.01 years (1,832 days). Its orbit has an eccentricity of 0.12 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins at Simeiz, 5 days after its official discovery observation.
In the SMASS taxonomy, is classified as a Ch-type, a hydrated subtype of the carbonaceous C-type asteroids.
This minor planet was named after Lidiya Terent'eva (1879–1933), female collaborator at the Simeis Observatory.