90482 Orcus facts for kids
|Discovered by||M. Brown,
|Discovery date||February 17, 2004|
|Other names||2004 DW|
|Reference date November 30, 2008 (JD 2 454 800)|
|Longest distance from the Sun||7 188.17 Gm (48.05 AU)|
|Shortest distance from the Sun||4 535.80 Gm (30.32 AU)|
|Longest distance from the center of its orbital path
|5 862.44 Gm (39.188 AU)|
|How long it takes to complete an orbit||89 606 d (245.33 yr)|
|Average speed||4.68 km/s|
|Angle above the reference plane
|Natural things which orbit it||1 (92-432 km)|
|Size and other qualities|
|Measurements||946.3 +74.1−72.3 km (diameter)|
|Average density||~1.5 g/cm³ (assumed)|
|Surface gravity||~0.2 m/s²|
|Escape velocity||~0.44 km/s|
|How much light it reflects||19.75 +3.40−2.76 %|
|Avg. surface temp.||~45 K|
|Spectral type||B-V=0.68; V-R=0.37|
90482 Orcus, originally known by the provisional designation 2004 DW) is a Kuiper belt object (KBO) and could be a dwarf planet. It was found by Michael Brown, Chad Trujillo and David Rabinowitz on February 17, 2004. It was also seen in pictures from November 8, 1951.
The satellite was found at 0.25 arcsec from Orcus with magnitude difference of 2.7. Assuming an albedo similar to that of the primary, the magnitude suggests a diameter of about 220 km. It is thought to be a smaller KBO that was captured.
90482 Orcus Facts for Kids. Kiddle Encyclopedia.