S / 2000 (1998 WW 31 ) 1
| 1998 WW 31 I. | |
|---|---|
| Provisional or systematic name | S / 2000 (1998 WW 31 ) 1 |
| Central body | 1998 WW 31 |
| Properties of the orbit | |
| Major semi-axis | (22300 ± 800) km |
| Periapsis | (4100 ± 1300) km |
| Apoapsis | (40500 ± 2600) km |
| eccentricity | 0.817 ± 0.05 |
| Orbit inclination | (41.7 ± 7) ° |
| Orbital time | (574 ± 10) d |
| Physical Properties | |
| Medium diameter | (110 ± 12) km |
| Medium density | 0.8 g / cm 3 |
| Acceleration of gravity on the surface | ≈ 0 m / s 2 |
| Escape speed | ≈ 0 m / s |
| discovery | |
| Explorer |
C. Veillet, J. Shapiro A. Doressoundiram |
| Date of discovery | December 22, 2000 |
S / 2000 (1998 WW 31 ) 1 is the moon of the trans-Neptunian object 1998 WW 31 , with which it forms the first double system discovered in the Kuiper belt after Pluto - Charon .
S / 2000 (1998 WW 31 ) 1 was discovered in April 2001 by Christian Veillet, Joshua Shapiro and Alain Doressoundiram on recordings made on December 21 and 22, 2000. The discovery was published on April 16, 2001 .