1189 Terentia
Asteroid
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1189 Terentia, provisional designation 1930 SG, 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.[15]
_Terentia.png)
Modelled shape of Terentia from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 17 September 1930 |
| Designations | |
| (1189) Terentia | |
Named after | Lidiya Terent'eva (orbit computer)[2] |
| 1930 SG · 1935 SK2 A915 TJ | |
| main-belt · (outer)[3] Terentia[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.46 yr (37,057 days) |
| Aphelion | 3.2681 AU |
| Perihelion | 2.5914 AU |
| 2.9298 AU | |
| Eccentricity | 0.1155 |
| 5.01 yr (1,832 days) | |
| 103.65° | |
| 0° 11m 47.4s / day | |
| Inclination | 9.8671° |
| 275.24° | |
| 95.571° | |
| Physical characteristics | |
| Dimensions | 55.40±14.41 km[5] 55.88±3.2 km[6] 55.94 km (derived)[3] 57.23±17.09 km[7] 59.246±0.201 km[8] 61.140±1.045 km[9] 62.81±0.85 km[10] 70.90±0.51 km[11] |
| 19.30±0.01 h[12] 19.308±0.002 h[13] | |
| 0.042±0.006[11] 0.045±0.001[10] 0.0473±0.0053[9] 0.05±0.04[5][7] 0.0566±0.007[6] 0.0619 (derived)[3] | |
| SMASS = Ch[1] · C[3] | |
| 9.80[5][11] · 9.84±0.26[14] · 9.9[1] · 9.96[7][3] · 10.00[6][9][10] | |
Classification
Terentia is the namesake of the Terentia family (618), a small asteroid family of less than a hundred known members of a carbonaceous C-type composition orbiting in the outer main-belt.[4]
Orbit
Terentia orbits the Sun at a distance of 2.6â3.3 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.[1] The body's observation arc begins at Simeiz, 5 days after its official discovery observation.[15]
Physical characteristics
In the SMASS taxonomy, is classified as a Ch-type, a hydrated subtype of the carbonaceous C-type asteroids.[1]
Naming
This minor planet was named after Lidiya Terent'eva (1879â1933), female collaborator at the Simeis Observatory.[1]
