(5259) Ephegeus ( lat. Epeigeus ) - a typical Trojan asteroid of Jupiter , moving at the Lagrange point L 4 , 60 ° ahead of the planet. The asteroid was discovered on January 30, 1989 by the American astronomer Carolyn Shoemaker at the Palomar Observatory and is named after Ephege (Eng.) , One of the heroes of the Trojan War [2] .
- Orbit of the asteroid Ephegeus and its position in the solar system
| (5259) Ephegeus | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Carolyn Shoemaker |
| Place of discovery | Palomar |
| Discovery date | January 30, 1989 |
| Alternative notation | 1989 BB 1 |
| Category | Jupiter's Trojans ( L 4 ) |
| Orbital characteristics | |
| Age of December 9, 2014 JD 2457000.5 | |
| Eccentricity ( e ) | 0,0727541 |
| Semimajor axis ( a ) | 777.866 million km (5.1997113 AU ) |
| Perihelion ( q ) | 721.273 million km (4.821411 AU) |
| Aphelion ( Q ) | 834.459 million km (5.5780116 AU) |
| Circulation Period ( P ) | 4,330,791 days (11,857 g ) |
| Average orbital speed | 13,045 km / s |
| Inclination ( i ) | 15.92168 ° |
| Longitude node (Ω) | 67.46889 ° |
| Perihelion Argument (ω) | 199.38833 ° |
| Median Anomaly ( M ) | 287.88755 ° |
| Physical Characteristics [1] | |
| Diameter | 42.59 km |
| Rotation period | 18.51 h |
| Apparent magnitude | 17.31 m (current) |
| Absolute magnitude | 10,2 m |
| Albedo | 0,0739 |
| Current distance from the sun | 5,098 a. e. |
| Current distance from earth | 4,197 a. e. |
Photometric observations carried out in 1995 made it possible to obtain the light curves of this body, from which it followed that the period of rotation of the asteroid around its axis is 18.51 ± 0.03 hours, with a change in brightness with rotation of 0.10 ± 0.01 m [1] .
See also
- List of Asteroids ( 5201–5300 )
- Classifications of Minor Planets
- List of Trojan asteroids ("Greeks")
- List of Trojan asteroids (“Trojans”)
Notes
- ↑ 1 2 Stefano Mottola1, Mario Di Martino, Anders Erikson, Maria Gonano-Beurer, Albino Carbognani, Uri Carsenty, Gerhard Hahn, Hans-Josef Schober, Felix Lahulla, Marco Delbò, and Claes-Ingvar Lagerkvist. ROTATIONAL PROPERTIES OF JUPITER TROJANS. I. LIGHT CURVES OF 80 OBJECTS . The American Astronomical Society . The Astronomical Journal (May 2011). Date of treatment December 30, 2014.
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003 .-- P. 451. - ISBN 3-540-00238-3 .