Back S/2015 (136472) 1 Arabic S/2015 (136472) 1 Azerbaijani S/2015 (136472) 1 Bulgarian S/2015 (136472) 1 Catalan ئێم کەی ٢ (مانگ) CKB S/2015 (136472) 1 Czech S/2015 (136472) 1 German S/2015 (136472) 1 Greek S/2015 (136472) 1 Spanish S/2015 (136472) 1 Basque
_1&sq=Vangelis&lang=en&file=File:Makemake_moon_Hubble_image_with_legend_(cropped).jpg) Makemake and its moon (arrow) | |
| Discovery[1] | |
|---|---|
| Discovered by |
|
| Discovery date | April 2015 |
| Designations | |
| MK2 (unofficial)[2] | |
| Orbital characteristics[1] | |
| >21000 km | |
| Eccentricity | unknown |
| >12.4 days | |
| Satellite of | Makemake |
| Physical characteristics | |
Mean radius | ~ 87.5 km (for an assumed albedo of 4%)[1] |
| Albedo | ~ 0.1 0.04[1] |
| 25.0[3] | |
| 7.8[a] | |
S/2015 (136472) 1, nicknamed MK2 by the discovery team,[2] is the only known moon of the trans-Neptunian dwarf planet Makemake.[1][4][5] It is estimated to be 175 km (110 mi) in diameter (for an assumed albedo of 4%) and has a semi-major axis at least 21,000 km (13,000 mi) from Makemake.[1][6] Its orbital period is ≥ 12 days (the minimum values are those for a circular orbit; the actual orbital eccentricity is unknown).[7][1][5] 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]
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