(325) Heidelberg ( German: Heidelberga ) - an asteroid on the outer part of the main belt , which belongs to the metal spectral class M. It was discovered on March 4, 1892 by the German astronomer Max Wolf at the Heidelberg Observatory and named after the German city of Heidelberg , next to which this observatory is located [1] .
| (325) Heidelberg | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Max Wolf |
| Place of discovery | Heidelberg Observatory |
| Discovery date | March 4, 1892 |
| Eponym | Heidelberg |
| Alternative notation | 1949 HQ |
| Category | Main ring |
| Orbital characteristics | |
| Age of August 27, 2011 JD 2455800.5 | |
| Eccentricity ( e ) | 0,1604113 |
| Semimajor axis ( a ) | 480.156 million km (3,2096434 AU ) |
| Perihelion ( q ) | 403.133 million km (2.6947803 AU) |
| Aphelion ( Q ) | 557.178 million km (3.7245065 AU) |
| Circulation Period ( P ) | 2100.311 days (5.75 g ) |
| Average orbital speed | 16.518 km / s |
| Inclination ( i ) | 8.55795 ° |
| Longitude node (Ω) | 344.92958 ° |
| Perihelion Argument (ω) | 68.29356 ° |
| Median Anomaly ( M ) | 93.51783 ° |
| physical characteristics | |
| Diameter | 75.72 km |
| Weight | 4,55⋅10 17 kg |
| Density | 2,000 g / cm³ |
| Acceleration of free fall on the surface | 0.0212 m / s² |
| 2nd space speed | 0,0400 km / s |
| Rotation period | 6.737 h |
| Spectral class | M |
| Apparent magnitude | 14.92 m (current) |
| Absolute magnitude | 8.65 m |
| Albedo | 0.1068 |
| Average surface temperature | 155 K (−118 ° C ) |
| Current distance from the sun | 3.54 a. e. |
| Current distance from earth | 3.378 a. e. |
The orbit of the asteroid Heidelberg and its position in the solar system
See also
- The list of asteroids ( 301-400 )
- 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. 42. - ISBN 3-540-00238-3 .