Eris > Sedna > Planet 9

This is a dwarf planet candidate.

Name

• Sedna

Discovery date

• November 13, 2003^[1]

Discoverers

• Michael Brown^[1]
• Chad Trujjilo^[1]
• David Rabinowitz^[1]

Orbiting

• The Sun^[1]

Characteristics

• Semi-major axis = 518.57 AU^[1]
• Orbital period = 12,059.06 Earth years^[1]

About the dwarf planet

• Dwarf planet canditate.^[1]
• Sedna appears a reddish color.^[1]
• Has the longest known orbital period of all the non-comet objects of the Solar System.^[1]

Sources

• wikipedia.org
• science.nasa.gov

References