(1011) Laodamia ( Latin Laodamia , other Greek Λᾱοδάμεια ) - an asteroid belonging to the group of asteroids crossing the orbit of Mars . It was discovered on January 5, 1924 by the German astronomer Karl Rainmouth at the Heidelberg Observatory and named after one of the heroines of ancient Greek mythology ( Laodamia , daughter of Tsar Acast , or Laodamia, daughter of Bellerophon ) [1] .
| (1011) Laodamia | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Carl Rainmouth |
| Place of discovery | Heidelberg |
| Discovery date | January 5, 1924 |
| Eponym | Laodamia |
| Alternative notation | 1923 PE |
| Category | Mars Crossers |
| Orbital characteristics | |
| Age of December 9, 2014 JD 2457000.5 | |
| Eccentricity ( e ) | 0.3504804 |
| Semimajor axis ( a ) | 358.01 million km (2,3931488 AU ) |
| Perihelion ( q ) | 232.534 million km (1.5543971 AU) |
| Aphelion ( Q ) | 483.485 million km (3.2319005 A.E.) |
| Circulation Period ( P ) | 1352.238 days (3.702 g. ) |
| Average orbital speed | 18.647 km / s |
| Inclination ( i ) | 5,49423 ° |
| Longitude node (Ω) | 132.55636 ° |
| Perihelion Argument (ω) | 353.31094 ° |
| Median Anomaly ( M ) | 181.80369 ° |
| physical characteristics | |
| Diameter | 8 - 17 km |
| Rotation period | 5.17247 h |
| Spectral class | S (Sr) |
| Apparent magnitude | 15.64 m (current) |
| Absolute magnitude | 12.74 m |
| Current distance from the sun | 2,346 a. e. |
| Current distance from earth | 1.358 a. e. |
The asteroid is characterized by an extremely elongated orbit (0.456), which allows it not only to invade the orbit of Mars, but also to go far beyond the asteroid belt . In this case, rapprochements with Mars are possible. One of these will happen on September 5, 2083, when the asteroid flies at 0.06186 a. e. (9.254 million km) from the planet [2] .
As a result of photometric studies of the asteroid at the Bulgarian National Astronomical Observatory Rozhen , its rotation period was specified - 5.17 hours [3] .
See also
- List of asteroids (1001–1100)
- 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. 87. - ISBN 3-540-00238-3 .
- ↑ JPL Close-Approach Data: 1009 Sirene (1923 PE) (link not available - history ) . Date of treatment June 23, 2014.
- ↑ Ivanova VG, Apostolovska G., Borisov GB, Bilkina BI Results from photometric studies of asteroids at Rozhen National Observatory, Bulgaria // ESA SP-500: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, July 29 - August 2, 2002, Berlin, Germany / Ed. Barbara Warmbein. - Noordwijk, Netherlands: ESA Publications Division, 2002. - P. 505-508 . - . ISBN 92-9092-810-7