(443) Photographic ( fr. Photographie ) - an asteroid of the main belt , which belongs to the bright spectral class S. It was discovered on February 17, 1899 by German astronomers Max Wolf and Friedrich Schwassmann at the Heidelberg Observatory and is named after the astrophotography method, which at that time revolutionized the discovery of asteroids [1] .
| (443) Photographics | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Max Wolf , Friedrich Schwassman |
| Detection point | Heidelberg |
| Date of discovery | February 17, 1899 |
| Eponym | The photo |
| Alternative designations | 1899 EF ; 1930 YG; 1930 YJ; 1947 WC |
| Category | Main ring |
| Orbital characteristics | |
| The era of November 4, 2013 JD 2456600.5 | |
| Eccentricity ( e ) | 0.0407466 |
| Semi-axis ( a ) | 331.46 million km (2,2156701 a. E.) |
| Perihelion ( q ) | 317.954 million km (2.1253891 a. E.) |
| Afhelia ( Q ) | 344.965 million km (2.3059511 a. E.) |
| Period of circulation ( P ) | 1204,637 days (3.298 g ) |
| Average orbital speed | 20.001 km / s |
| Inclination ( i ) | 4.23382 ° |
| Ascending node longitude (Ω) | 175.48789 ° |
| Perihelion Argument (ω) | 349.38927 ° |
| Mean Anomaly ( M ) | 270.18243 ° |
| physical characteristics | |
| Diameter | 26.68 km |
| Weight | 1.99⋅10 16 kg |
| Density | 2,000 g / cm³ |
| Acceleration of gravity on the surface | 0.0075 m / s² |
| 2nd cosmic speed | 0.0141 km / s |
| Rotation period | 19.795 h |
| Spectral class | S (Sl) |
| Apparent magnitude | 14.06 m (current) |
| Absolute magnitude | 10.28 m |
| Albedo | 0.1918 |
| Average surface temperature | 182 K (−91 ° C ) |
| Current distance from the Sun | 2.306 a. e. |
| Current distance from Earth | 1.547 a. e. |
Asteroid orbit Photography and its position in the solar system
See also
- List of asteroids ( 401-500 )
- Small Planet Classifications
Notes
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003. - P. 50. - ISBN 3-540-00238-3 .