S/2015 (136472) 1

S/2015 (136472) 1
Makemake and its moon S/2015 (136472) 1 (arrow)
Discovery[1]
Discovered by
Discovery dateApril 2015
Designations
MK2 (unofficial)[2]
Orbital characteristics[1]: 3 
>21000 km
Eccentricityunknown
>12.4 days
Inclination63°–87° wrt ecliptic (prograde)[1]: 3 
Satellite ofMakemake
Physical characteristics
~175 km (4% albedo; best fit)[1]: 4 
175–250 km (2–4% albedo)[a]
Albedo0.04 (best fit)[1]: 4 
0.02–0.04[1]: 4 
25.0[3]
7.89±0.04[1]: 3 

S/2015 (136472) 1, unofficially nicknamed MK2 by the discovery team,[2] is the only known moon of the trans-Neptunian dwarf planet Makemake.[1][4] It is estimated to be 175 km (110 mi) in diameter and has a semi-major axis of at least 21,000 km (13,000 mi) from Makemake.[1] Its orbital period is at least 12 days if it has a circular orbit.[1][5][4] Observations leading to its discovery occurred in April 2015, using the Hubble Space Telescope's Wide Field Camera 3, and its discovery was announced on 26 April 2016.[2]

  1. ^ a b c d e f g h i j Cite error: The named reference Parker2016 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference hubblesite was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Grundy-Makemake was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference PlanetarySociety was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference CBET4275 was invoked but never defined (see the help page).


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