S / 2005 (29314) 1
| (29314) Eurydamas I (S / 2005 (29314) 1) | |
|---|---|
| Provisional or systematic name | S / 2005 (29314) 1 |
| Central body | (29314) Eurydamas |
| Properties of the orbit | |
| Major semi-axis | 41 km |
| Periapsis | unknown |
| Apoapsis | unknown |
| Orbital time | 0.62646 ± 0.00030 d |
| Physical Properties | |
| Albedo | ≈ 0.140 ± 0.039 |
| Medium diameter | 16.0 km |
| surface | 800 km 2 |
| Medium density | ≈ 0.59 ± 0.06 g / cm 3 |
| discovery | |
| Explorer |
|
| Date of discovery | August 14, 2003 |
S / 2005 (29314) 1 is a moon of the L 5 - Jupiter Trojan (29314) Eurydamas . Its mean diameter is 16 kilometers.
Discovery and naming
S / 2005 (29314) 1 was discovered on August 14, 2003 by Rita K. Mann, David C. Jewitt and Pedro Lacerda through light curve observations. The discovery was announced on June 1, 2007; the moon was given the provisional designation S / 2005 (29314) 1 . An official naming by the IAU is still pending.
Track properties
Orbit
S / 2005 (29314) 1 orbits Eurydamas in an orbit at an average distance of 41 kilometers from its center (about 3.8 Eurydamas radii). The orbital eccentricity and inclination are not yet determined.
The orbit time of S / 2005 (29314) 1 is 15 hours and 2.1 minutes. The orbit of S / 2001 (47171) 1 is well within Eurydamas' Hill radius of 9,800 km.
rotation
Since the orbital time is equal to the rotation time of the main body of Eurydama's, it is most likely a double- bound rotation . This means that both bodies always face the same side. The prerequisite for this is a similar mass ratio and a narrow orbit of the two bodies.
Physical Properties
size
According to current data, S / 2005 (29314) 1 has a diameter of 16 km (about 3/4 of the central body), based on Eurydamas' estimated density of 0.59 g / cm 3 and the corresponding assumed equal reflectivity of 14%.
Assuming an average diameter of 16 km, this results in a surface of around 804 km 2 , which corresponds to the area of the Swiss canton of Neuchâtel .
Determination of the diameter for S / 2005 (29314) 1
| year | Dimensions km | source |
|---|---|---|
| 2007 | 24 | Man u. a. |
| 2012 | 16 | Grav u. a. |
The most precise determination is marked in bold .
internal structure
The unusually low mean density of 0.59 g / cm 3 is an indication that it is not a compact body, but that the object is likely to be a rubble pile , an accumulation of dust and rocks interspersed with cavities .
See also
Web links
- Wm. Robert Johnston: (29314) Eurydamas (English)
Individual evidence
- ^ Rita K. Mann et al: Fraction of contact binary asteroids (September 2007) (PDF). Retrieved September 18, 2017 .
- ↑ T. Grav et al .: WISE / NEOWISE Observations of the Jovian Trojan Population: Taxonomy (November 2012). Retrieved September 18, 2017 .