Global Information9950 ESA information
 Animated orbit of 9950 ESA | |
| Discovery [1] | |
|---|---|
| Discovered by | C. Pollas |
| Discovery site | Caussols Obs. (010) |
| Discovery date | 8 November 1990 |
| Designations | |
MPC designation | (9950) ESA |
Named after | European Space Agency [2] |
Alternative designations | 1990 VB |
Minor planet category | NEO · Amor [1][3][4] Mars-crosser |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 26.90 yr (9,824 days) |
| Aphelion | 3.7367 AU |
| Perihelion | 1.1391 AU |
Semi-major axis | 2.4379 AU |
| Eccentricity | 0.5328 |
Orbital period (sidereal) | 3.81 yr (1,390 days) |
Mean anomaly | 17.795° |
Mean motion | 0° 15m 32.04s / day |
| Inclination | 14.597° |
Longitude of ascending node | 253.51° |
Argument of perihelion | 103.57° |
| Earth MOID | 0.2806 AU · 109.3 LD |
| Physical characteristics | |
| Dimensions | 1.71 km (calculated)[5] 3 km (estimated)[4]: 21 |
Synodic rotation period | 6.707±0.002 h[6][a] 6.7078±0.0007 h[7] 6.712±0.005 h[8][b] |
Geometric albedo | 0.20 (assumed)[5] |
Spectral type | S (assumed)[5] |
Absolute magnitude (H) | 16.2[1][5] |
9950 ESA, provisional designation 1990 VB, is an eccentric asteroid and elongated near-Earth object of the Amor group, approximately 1.7 kilometers in diameter. It was discovered on 8 November 1990, by French astronomer Christian Pollas at the Centre de recherches en géodynamique et astrométrie (Cerga) at Caussols in southeastern France.[3] It was named for the European Space Agency (ESA).[2]
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