406 Erna
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| Discovery A | |
|---|---|
| Discoverer | Auguste Charlois |
| Discovery date | August 22, 1895 |
| Alternate designations B |
1895 CB |
| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.183 |
| Semi-major axis (a) | 435.972 Gm (2.914 AU) |
| Perihelion (q) | 356.339 Gm (2.382 AU) |
| Aphelion (Q) | 515.605 Gm (3.447 AU) |
| Orbital period (P) | 1817.147 d (4.98 a) |
| Mean orbital speed | 17.45 km/s |
| Inclination (i) | 4.198° |
| Longitude of the ascending node (Ω) |
315.863° |
| Argument of perihelion (ω) |
38.107° |
| Mean anomaly (M) | 336.544° |
| Physical characteristics D | |
| Dimensions | 49.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Spectral class | P |
| Absolute magnitude | 10.36 |
| Albedo (geometric) | unknown |
| Mean surface temperature |
unknown |
406 Erna is a typical Main belt asteroid. It is classified as a P-type asteroid and is probably composed of primitive carbonaceus chondritic materials.
It was discovered by Auguste Charlois on August 22, 1895 in Nice.
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