S/2015 (136472) 1

Key facts

Discovered by

HST / Wide Field Camera 3 Alex H. Parker Marc W. Buie William M. Grundy Keith S. Noll

Discovery date

27 April 2015

Alternative names

MK 2 (unofficial nickname)

Semi major axis

22 250 ± 780 km

Eccentricity

≈0

Orbital period sidereal

18.023 ± 0.017 days

Inclination

83.7° wrt Earth line of sight , 63°–87° wrt ecliptic ( prograde )

Satellite of

Makemake

Mean diameter

~175 km (4% albedo; best fit) , 175–250 km (2–4% albedo)

Mean radius

87.5 km

Albedo

0.04 (best fit) , 0.02–0.04

Absolute magnitude h

7.89 ± 0.04