325 Heidelberga
Main-belt asteroid
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325 Heidelberga is a large main belt asteroid that was discovered by German astronomer Max Wolf on 4 March 1892 in Heidelberg. It is orbiting the Sun at a distance of 3.21 AU with an eccentricity (oval shape) of 0.159. The orbital plane is inclined at an angle of 8.55° to the ecliptic.[1]
Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | 4 March 1892 |
| Designations | |
| (325) Heidelberga | |
| Pronunciation | /ËhaɪdÉlËbÉËrÉ¡É/ |
Named after | Heidelberg |
| Main belt | |
| Adjectives | Heidelergian /ËhaɪdÉlËbÉËrdÊiÉn, -É¡iÉn/ |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.86 yr (43050 d) |
| Aphelion | 3.7223 AU (556.85 Gm) |
| Perihelion | 2.69998 AU (403.911 Gm) |
| 3.21115 AU (480.381 Gm) | |
| Eccentricity | 0.15919 |
| 5.75 yr (2101.8 d) | |
| 7.2090° | |
| 0° 10m 16.608s / day | |
| Inclination | 8.5545° |
| 344.881° | |
| 68.563° | |
| Physical characteristics | |
| Dimensions | 75.72±1.7 km |
| 6.737 h (0.2807 d) | |
| 0.1068±0.005 | |
| 8.65 | |
Based upon its spectrum, 325 Heidelberga is classified as an M-type asteroid. No absorption features have been detected with certainty, indicating it most likely has a nickel-iron or enstatite chondrite composition.[2] A weak feature in the near infrared spectrum indicates the presence of low-iron orthopyroxene on the asteroid surface.[3]
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