S / 2009 (317) 1

(317) Roxane I (S / 2009 (317) 1)
Provisional or systematic name	S / 2009 (317) 1
Central body	(317) Roxane
Properties of the orbit
Major semi-axis	257 km
Periapsis	unknown
Apoapsis	unknown
Orbital time	14 d
Physical Properties
Medium diameter	5.3 km
surface	88 km ²
Surface temperature	157 K
discovery
Explorer	William J. Merline Peter M. Tamblyn J. D. Drummond J. C. Christou A. R. Conrad Benoit Carry Clark R. Chapman Christophe Dumas Daniel D. Durda W. M. Owen B. L. Enke
Date of discovery	November 24, 2009
Remarks	Largest moon in the asteroid belt

S / 2009 (317) 1 is a moon of the main belt asteroid (317) Roxane . Its mean diameter is 5.3 kilometers.

Discovery and naming

S / 2009 (317) 1 was written on November 24, 2009 by William J. Merline, Peter M. Tamblyn, JD Drummond, JC Christou, AR Conrad, Benoit Carry, Clark R. Chapman, Christophe Dumas, Daniel D. Durda, WM Owen and BL Enke discovered using adaptive optics with the 8.1 m Gemini North Telescope at Mauna Kea Observatory in Hawaii . The discovery was announced two days later on November 26, 2009; the moon was given the provisional designation S / 2009 (317) 1 . An official naming by the IAU is still pending.

Track properties

S / 2009 (317) 1 orbits Roxane in an orbit at a relatively wide mean distance of 257 kilometers from its center (about 27.6 Roxane radii). The orbital eccentricity and inclination are currently unknown.

S / 2009 (317) 1 circles Roxane with 14 days therefore extraordinarily slowly; this corresponds to around 90 orbits in a Roxane year (around 3.5 earth years). The orbit of S / 2009 (317) 1 is assumed to be stable because it is well within Roxane's Hill radius of 3,200 km, but also well outside of the synchronous orbit.

Physical Properties

size

According to current data, S / 2009 (317) has a diameter of 5.3 km (almost 1/4 of the central body), based on Roxane's estimated density and the corresponding assumed equal reflectivity of 9.3%.

Assuming a mean diameter of 5.3 km, the surface area is around 88.2 km ² , which is almost exactly the area of Lake Zurich in Switzerland .

Determination of the diameter for S / 2009 (317) 1

year	Dimensions km	source
2009	5.0	Marsden et al.
2010	5.3	Durda et al.

The most precise determination is marked in bold .

internal structure

Since S / 2009 (317) 1 has a similar color to the mother body, it is assumed that the moon is made of the same material as Roxane and therefore has the same spectral type (E or Xe).

The mean surface temperature is 157 K (−116 ° C).

Web links

Wm. Robert Johnston: (317) Roxane and S / 2009 (317) 1 (English)
Brian G. Marsden: S / 2009 (317) 1 With photo by Roxane and S / 2009 (317) 1 (English)

Individual evidence

↑ Daniel WE Green: IAUC No. 9099: S / 2009 (317) 1 discovery publication . December 2009, bibcode : 2009IAUC.9099 .... 2M .
^ Brian G. Marsden et al .: S / 2009 (317) 1 (November 2009). Retrieved September 12, 2017 .
↑ DD Durda et al .: Comparing the properties of observed main-belt asteroid binaries and modeled escaping ejecta binaries (EEBs) from numerical simulations (2010) (PDF). Retrieved September 12, 2017 .

[iauc9099-1] Daniel WE Green: IAUC No. 9099: S / 2009 (317) 1 discovery publication . December 2009, bibcode : 2009IAUC.9099 .... 2M .

[marsden-2] Brian G. Marsden et al .: S / 2009 (317) 1 (November 2009). Retrieved September 12, 2017 .

[vachier-3] DD Durda et al .: Comparing the properties of observed main-belt asteroid binaries and modeled escaping ejecta binaries (EEBs) from numerical simulations (2010) (PDF). Retrieved September 12, 2017 .