Dwarf planets

The below table lists the official dwarf planets as currently recognized by the IAU (International Astronomical Union).
For detailed information about one of the dwarf planets, click on its name.

Dwarf planet Today Opposition
designation magn radius delta elong phase date magn radius delta elong phase
Ceres 8.72.70 AU3.69 AU9.6°3.6°31 Jan 20186.92.57 AU1.60 AU166.7°5.1°
Pluto14.933.35 AU32.37 AU164.2°0.5°10 Jul 201714.833.36 AU32.35 AU179.2°0.0°
Makemake17.152.49 AU52.49 AU89.3°1.1°24 Mar 201817.052.51 AU51.64 AU151.2°0.5°
Haumea17.450.56 AU50.25 AU107.5°1.1°14 Apr 201817.350.50 AU49.62 AU151.4°0.5°
Eris18.896.19 AU96.54 AU69.4°0.6°16 Oct 201718.896.17 AU95.19 AU167.7°0.1°

Note that several candidate dwarf planets are known to exist that are not yet officially recognized by the IAU, like for example Orcus, 2002 MS4, Salacia, Quaoar, 2007 OR10 and Sedna.

The current positions of the recognized dwarf planets are plotted in the below all-sky chart:

    delta:      Distance between dwarf planet and earth in AU
    radius:     Distance between dwarf planet and sun in AU
    magn:       Magnitude (brightness) estimate    
    elong:      Elongation in degrees (angle sun-earth-dwarf planet)    
    AU:         Astronomical Unit (mean distance between earth and sun: 149597870.7 km    

Orbital elements provided by MPC (Minor Planet Center)
UCAC4 star catalog via VizieR as provided by the Strasbourg astronomical Data Center.
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.