1 day / second

0.5 AU

2021 RR205

Trans-Neptunian Object

A large and distant trans-Neptunian object, discovered in 2021, that follows a highly elliptical 1,685-year orbit extending over 180 astronomical units from the Sun at its farthest point.

Key Facts

orbital regime

Inner Oort Cloud

learn more

Wikipedia

mass

3.5343e+19 kg

radius

150 km

hill radius

0.01 AU

semi-major axis

990.9 AU

eccentricity

0.944

inclination

7.644º

longitude of the ascending node

108.345º

argument of periapsis

208.574º

orbital period

31,191.991 years

surface gravity

0.011 g

class

sednoid (disputed)

discovery date

September 2021

discovered by

Scott Sheppard's team at Carnegie Institution for Science

instance of

Extreme trans-Neptunian object
Other Trans-Neptunian Objects
Arrokoth
Leleākūhonua
FarFarOut
Albion
Arawn
Varuna