 Orbital diagram | |
| Discovery[1] | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Observatory |
| Discovery date | 19 August 1882 |
| Designations | |
| (228) Agathe | |
Named after | daughter of astronomer Theodor v. Oppolzer[2] |
| A882 QA | |
| main-belt | |
| Orbital characteristics[1] | |
| Epoch 13 September 2023 (JD 2453300.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.80 yr |
| Aphelion | 2.73 AU (408 million km) |
| Perihelion | 1.67 AU (250 million km) |
| 2.20 AU (329 million km) | |
| Eccentricity | 0.24227 |
| 3.27yr (1193.1d) | |
| 63.67° | |
| 0° 18m 6.408s / day | |
| Inclination | 2.5359° |
| 313.25° | |
| 19.177° | |
| Earth MOID | 0.657 AU (98.3 million km) |
| Mars MOID | 0.29 AU (43 million km) |
| Jupiter MOID | 2.63 AU (393 million km) |
| TJupiter | 3.624 |
| Physical characteristics | |
| Dimensions | 9.30±0.8 km |
| 6.484 h (0.2702 d) | |
| 0.2082±0.043 | |
| B–V = 0.918 U–B = 0.596 S(Tholen),S(SMASS) | |
| 12.32 | |
228 Agathe is a stonymain beltasteroid, about 9 kilometers in diameter. It was discovered byJohann Palisa on 19 August 1882 atVienna Observatory, Austria.Photometric observations during 2003 showed arotation period of 6.48 ± 0.01 hours with a brightness variation of 0.27 ± 0.03 inmagnitude. An earlier study yielded results that are consistent with these estimates.[3] Agathe is the lowestnumbered asteroid to have an Earth-MOID as low as 0.657 AU (98.3 million km).[1] On 23 August 2029 the asteroid will be 0.659 AU (98.6 million km) from Earth.
| Date and time of closest approach | Earth distance (AU) | Sun distance (AU) | Velocity relative to Earth (km/s) | Velocity relative to Sun (km/s) | Uncertainty region (3-sigma) | Solar elongation |
|---|---|---|---|---|---|---|
| 23 August 2029 ≈07:22 | 0.6597 AU (98.69 million km; 61.32 million mi; 256.7 LD) | 1.67 AU (250 million km; 155 million mi) | 3.9 | 25.7 | ± 1.4 km | 177.9° |
Agathe was named after the youngest daughter of Austrian astronomerTheodor von Oppolzer (1841–1886), professor of astronomy in Vienna.[2]
_mathilde.jpg) | This article about an asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
