 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | 25 September 1879 |
| Designations | |
| (203) Pompeja | |
| Pronunciation | /pɒmˈpiːə/[1] |
Named after | Pompeii |
| A879 SA, 1895 EA | |
| Main belt | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.43 yr (49,832 d) |
| Aphelion | 2.897 AU (433.4 Gm) |
| Perihelion | 2.577 AU (385.5 Gm) |
| 2.737 AU (409.4 Gm) | |
| Eccentricity | 0.058490 |
| 4.53 yr (1,653.6 d) | |
Averageorbital speed | 18.01 km/s |
| 47.6383° | |
| 0° 13m 3.72s / day | |
| Inclination | 3.1780° |
| 347.916° | |
| 57.060° | |
| Physical characteristics | |
| 124.592±1.079 km[2] | |
| Mass | (1.251 ± 0.640/0.401)×1018 kg[3] |
Meandensity | 1.626 ± 0.831/0.521 g/cm3[3][a] |
| 24.052 h (1.0022 d)[4][2] | |
| 0.036±0.006[2] | |
| DCX: | |
| 8.97[2] | |
203 Pompeja is a fairly largemain-beltasteroid. It was discovered byC. H. F. Peters on September 25, 1879, inClinton, New York, and named afterPompeii, theRoman town destroyed involcanic eruption inAD 79. This asteroid is orbiting theSun at a distance of2.74 AU with aneccentricity (ovalness) of 0.06 and aperiod of 4.53 yr. Theorbital plane is tilted at an angle of 3.2° to theplane of the ecliptic.[2]
Based uponphotometric observations taken during 2011, it has a synodicrotation period of 24.052 ± 0.001 h, with a peak-to-peak amplitude of 0.10 ± 0.01 inmagnitude. Because the rotation period nearly matches that of the Earth, it required coordinated observations from multiple observatories at widely spaced latitudes to produce a completelight curve.[4] As discovered in 2021, Pompeja alongside the main-belt asteroid269 Justitia have very red colors due totholins on its surface, similar totrans-Neptunian objects. These asteroids are therefore thought to have formed in the outer Solar System despite their current orbits within the asteroid belt.[5]
_mathilde.jpg) | This article about an asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
