Sawiskera (moon)
9.5055 ± 0.0010 or 5:50 ± 0:02 h
- J. L. Elliot
- S. D. Kern
- D. J. Osip
Sawiskera is the smaller component ( moon ) of the double asteroid system of the Kuiper Belt asteroids and cubewanos ( 88611 ) Teharonhiawako. Its average diameter is about 122 kilometers, which he is about 30.7 % less than the parent asteroid.
Discovery and designation
Sawiskera was by JL Elliot, SD core and DJ Osip with observations on 11 - 12th October 2001 discovered with the 6.5 -meter Walter Baade telescope at Las Campanas Observatory, Chile. Sawiskera was at 0.6 arcsec distance from the almost two months earlier discovered Teharonhiawako found a difference between the apparent magnitude of 0.55. The discovery was published on 15 October 2001; the companion received the provisional designation S/2001 ( 88611 ) 1 The two names of the system have been proposed by RJ Benecchi and SD core.
On 29 May 2007, the moon, among others, together with the very bright comet C/2006 P1 ( McNaught ), by the International Astronomical Union ( IAU) officially named after Sawískera, the evil twin brother of Teharonhiawáko in the founding mythology of the Haudenosaunee is. Sawískera was a skilled hunter, but he was cruel, jealous and destructive, and he was eventually killed by his brother. It is said that the name should not be pronounced at night.
Web properties
Orbit
Sawiskera orbits Teharonhiawako in a prograde elliptical orbit 20750-33850 km Distance to the center ( large semi-major axis 27.3 thousand kilometers or approximately 310.2 or 447.5 Teharonhiawako Sawiskeraradien ). Since both revolve around their common center of gravity, the system is regarded as a double asteroid system. The orbital eccentricity is 0.240, the orbit is inclined 60.0 degrees to the ecliptic.
Sawiskera and Teharonhiawako orbit each other in 825 days or 2 years and 95 days, ie much longer than the planet Mars around the Sun requires ( ). This corresponds to about 128.8 rounds in a Teharonhiawako - year ( about 290.99 Earth years ).
Rotation
Sawiskera has its own rotation period, either 4 h 45.1 m or 9 h 30.3 m, according to other data 5 h 30 m.
Physical Properties
Sawiskera has a diameter estimated at 122 km (about 69.3 % of the central body ) based on the corresponding Teharonhiawako adopted for the same albedo 9-14 %. The surface is thus relatively dark. Its density is as Teharonhiawako estimated to be about 1.5 g/cm3.