(497) Iva ( lat.Iva ) - an asteroid of the main belt , which belongs to the metal spectral class M. It was discovered on November 4, 1902 by the American astronomer Raymond Dugan at the Heidelberg Observatory and is named after the daughter of the discoverer [1] .
| (497) Willow | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Raymond Dugan |
| Place of discovery | Heidelberg |
| Discovery date | November 4, 1902 |
| Alternative notation | 1902 KJ ; 1947 BN; 1950 TD 3 |
| Category | Main ring |
| Orbital characteristics | |
| Age of November 4, 2013 JD 2456600.5 | |
| Eccentricity ( e ) | 0.2958786 |
| Semimajor axis ( a ) | 427.39 million km (2.8569251 AU ) |
| Perihelion ( q ) | 300.934 million km (2.0116221 AU) |
| Aphelion ( Q ) | 553.845 million km (3.7022281 AU) |
| Circulation Period ( P ) | 1763.789 days (4.829 g. ) |
| Average orbital speed | 17,229 km / s |
| Inclination ( i ) | 4.80796 ° |
| Longitude node (Ω) | 6,49970 ° |
| Perihelion Argument (ω) | 3,50530 ° |
| Median Anomaly ( M ) | 37.98839 ° |
| physical characteristics | |
| Diameter | 45.3 km |
| Weight | 9.73⋅10 16 kg |
| Density | 2,000 g / cm³ |
| Acceleration of free fall on the surface | 0.0127 m / s² |
| 2nd space speed | 0.0240 km / s |
| Rotation period | 4,620 h |
| Spectral class | M |
| Apparent magnitude | 15.97 m (current) |
| Absolute magnitude | 10.02 m |
| Albedo | 0,084 |
| Average surface temperature | 165 K (−108 ° C ) |
| Current distance from the sun | 3.318 a. e. |
| Current distance from earth | 4.328 a. e. |
Orbit of the asteroid Willow and its position in the solar system
See also
- List of asteroids (401-500)
- Classifications of Minor Planets
Notes
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003 .-- P. 54. - ISBN 3-540-00238-3 .