Global Information9951 Tyrannosaurus information
 Orbit of Tyrannosaurus (blue), with the inner planets and Jupiter (outermost) | |
| Discovery [1] | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 15 November 1990 |
| Designations | |
MPC designation | (9951) Tyrannosaurus |
| Pronunciation | /tɪˌrænəˈsɔːrəs/[2] |
Named after | Tyrannosaurus (theropod dinosaur)[3] |
Alternative designations | 1990 VK5 · 1974 OG1 1992 EZ5 |
Minor planet category | main-belt · (inner) Vesta [4] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 42.53 yr (15,534 days) |
| Aphelion | 2.7243 AU |
| Perihelion | 2.1283 AU |
Semi-major axis | 2.4263 AU |
| Eccentricity | 0.1228 |
Orbital period (sidereal) | 3.78 yr (1,380 days) |
Mean anomaly | 155.31° |
Mean motion | 0° 15m 38.88s / day |
| Inclination | 7.4000° |
Longitude of ascending node | 133.42° |
Argument of perihelion | 153.36° |
| Physical characteristics | |
| Dimensions | 17 km[5] |
Spectral type | S [6] |
Absolute magnitude (H) | 14.2[1] |
9951 Tyrannosaurus, provisional designation 1990 VK5, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 15 November 1990, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile.[7] It was named after Tyrannosaurus, a genus of dinosaurs.[3]
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