{"id":"planet-sizes","reviewedAt":"2026-10-01T00:00:00+00:00","minRatio":1.1,"start":"earth","items":[{"id":"sun","name":"The Sun","category":"Star","metres":1391400000,"basis":"measured","dimension":"diameter","sizeLabel":"1.39 million km","altLabel":"864,576 miles","measure":"Diameter, from the volumetric mean radius","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html","sourceLabel":"NASA Sun Fact Sheet","quote":"Volumetric mean radius (km) 695,700","image":"/scale/sun.webp","imageSource":"https://images.nasa.gov/details/GSFC_20171208_Archive_e002035","imageCredit":"NASA/GSFC","imageLicense":"Public domain (NASA)","imageNote":"Ultraviolet observation"},{"id":"jupiter","name":"Jupiter","category":"Planet","metres":142984000,"basis":"measured","dimension":"diameter","sizeLabel":"142,984 km","altLabel":"88,846 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 142,984","image":"/scale/jupiter.webp","imageSource":"https://images.nasa.gov/details/PIA04866","imageCredit":"NASA/JPL/Space Science Institute","imageLicense":"Public domain (NASA)","imageNote":"Cassini spacecraft"},{"id":"saturn","name":"Saturn","category":"Planet","metres":120536000,"basis":"measured","dimension":"diameter","sizeLabel":"120,536 km","altLabel":"74,898 miles","measure":"Equatorial diameter · rings excluded","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 120,536","image":"/scale/saturn.webp","imageSource":"https://images.nasa.gov/details/PIA11141","imageCredit":"NASA/JPL/Space Science Institute","imageLicense":"Public domain (NASA)","imageNote":"Cassini spacecraft"},{"id":"uranus","name":"Uranus","category":"Planet","metres":51118000,"basis":"measured","dimension":"diameter","sizeLabel":"51,118 km","altLabel":"31,763 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 51,118","image":"/scale/uranus.webp","imageSource":"https://images.nasa.gov/details/PIA18182","imageCredit":"NASA/JPL-Caltech","imageLicense":"Public domain (NASA)","imageNote":"Voyager 2 spacecraft"},{"id":"neptune","name":"Neptune","category":"Planet","metres":49528000,"basis":"measured","dimension":"diameter","sizeLabel":"49,528 km","altLabel":"30,775 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 49,528","image":"/scale/neptune.webp","imageSource":"https://images.nasa.gov/details/PIA01492","imageCredit":"NASA/JPL","imageLicense":"Public domain (NASA)","imageNote":"Voyager 2 spacecraft"},{"id":"earth","name":"Earth","category":"Planet","metres":12756000,"basis":"measured","dimension":"diameter","sizeLabel":"12,756 km","altLabel":"7,926 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 12,756","image":"/scale/earth.webp","imageSource":"https://images.nasa.gov/details/PIA18033","imageCredit":"NASA","imageLicense":"Public domain (NASA)","imageNote":"Satellite mosaic"},{"id":"venus","name":"Venus","category":"Planet","metres":12104000,"basis":"measured","dimension":"diameter","sizeLabel":"12,104 km","altLabel":"7,521 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 12,104","image":"/scale/venus.webp","imageSource":"https://images.nasa.gov/details/PIA00271","imageCredit":"NASA/JPL","imageLicense":"Public domain (NASA)","imageNote":"Radar reconstruction"},{"id":"mars","name":"Mars","category":"Planet","metres":6792000,"basis":"measured","dimension":"diameter","sizeLabel":"6,792 km","altLabel":"4,220 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 6792","image":"/scale/mars.webp","imageSource":"https://images.nasa.gov/details/PIA00407","imageCredit":"NASA/JPL/USGS","imageLicense":"Public domain (NASA)","imageNote":"Spacecraft mosaic"},{"id":"mercury","name":"Mercury","category":"Planet","metres":4879000,"basis":"measured","dimension":"diameter","sizeLabel":"4,879 km","altLabel":"3,032 miles","measure":"Equatorial diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 4879","image":"/scale/mercury.webp","imageSource":"https://images.nasa.gov/details/PIA15162","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington","imageLicense":"Public domain (NASA)","imageNote":"Spacecraft mosaic"},{"id":"ganymede","name":"Ganymede","category":"Moon of Jupiter","metres":5262400.0,"basis":"measured","dimension":"diameter","low":5259000.0,"high":5265800.0,"sizeLabel":"5,262 km","altLabel":"3,270 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Ganymede … Mean Radius (km) 2631.20 ± 1.70","image":"/scale/ganymede.webp","imageSource":"https://images.nasa.gov/details/PIA00716","imageCredit":"NASA/JPL","imageLicense":"Public domain (NASA)","imageNote":"Galileo spacecraft"},{"id":"titan","name":"Titan","category":"Moon of Saturn","metres":5149520.0,"basis":"measured","dimension":"diameter","low":5149480.0,"high":5149560.0,"sizeLabel":"5,150 km","altLabel":"3,200 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Titan … Mean Radius (km) 2574.76 ± 0.02","image":"/scale/planets/titan.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Titan_in_true_color_by_Kevin_M._Gill.jpg","imageCredit":"NASA/JPL-Caltech/SSI/Kevin M. Gill","imageLicense":"CC BY 2.0","imageFile":"Titan in true color by Kevin M. Gill.jpg","imageNote":"Cassini data, true colour"},{"id":"callisto","name":"Callisto","category":"Moon of Jupiter","metres":4820600.0,"basis":"measured","dimension":"diameter","low":4817600.0,"high":4823600.0,"sizeLabel":"4,821 km","altLabel":"2,995 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Callisto … Mean Radius (km) 2410.30 ± 1.50","image":"/scale/planets/callisto.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Callisto_VGR2_C2060635_OGB.png","imageCredit":"zelario12","imageLicense":"CC BY-SA 2.0","imageFile":"Callisto VGR2 C2060635 OGB.png","imageNote":"Voyager 2 data"},{"id":"io","name":"Io","category":"Moon of Jupiter","metres":3642980.0,"basis":"measured","dimension":"diameter","low":3641980.0,"high":3643980.0,"sizeLabel":"3,643 km","altLabel":"2,264 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Io … Mean Radius (km) 1821.49 ± 0.50","image":"/scale/planets/io.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Io_highest_resolution_natural_color.png","imageCredit":"NASA","imageLicense":"Public domain","imageFile":"Io highest resolution natural color.png","imageNote":"Galileo spacecraft"},{"id":"moon","name":"The Moon","category":"Moon of Earth","metres":3474800.0,"basis":"measured","dimension":"diameter","low":3474600.0,"high":3475000.0,"sizeLabel":"3,475 km","altLabel":"2,159 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Moon … Mean Radius (km) 1737.4 ± 0.1","image":"/scale/moon.webp","imageSource":"https://images.nasa.gov/details/PIA00405","imageCredit":"NASA/JPL/USGS","imageLicense":"Public domain (NASA)","imageNote":"Galileo spacecraft"},{"id":"europa","name":"Europa","category":"Moon of Jupiter","metres":3121600.0,"basis":"measured","dimension":"diameter","low":3121000.0,"high":3122200.0,"sizeLabel":"3,122 km","altLabel":"1,940 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Europa … Mean Radius (km) 1560.80 ± 0.30","image":"/scale/planets/europa.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Europa_-_Perijove_45_(cropped).png","imageCredit":"NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill","imageLicense":"CC BY 2.0","imageFile":"Europa - Perijove 45 (cropped).png","imageNote":"Juno spacecraft"},{"id":"triton","name":"Triton","category":"Moon of Neptune","metres":2705200.0,"basis":"measured","dimension":"diameter","low":2700400.0,"high":2710000.0,"sizeLabel":"2,705 km","altLabel":"1,681 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Triton … Mean Radius (km) 1352.60 ± 2.40","image":"/scale/planets/triton.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Triton-usgs23-with-frame.jpg","imageCredit":"Michael T. Bland, U.S. Geological Survey (USGS)","imageLicense":"CC BY 4.0","imageFile":"Triton-usgs23-with-frame.jpg","imageNote":"Voyager 2 mosaic"},{"id":"pluto","name":"Pluto","category":"Dwarf planet","metres":2376000,"basis":"measured","dimension":"diameter","sizeLabel":"2,376 km","altLabel":"1,476 miles","measure":"Diameter","source":"https://nssdc.gsfc.nasa.gov/planetary/factsheet/","sourceLabel":"NASA Planetary Fact Sheet","quote":"Diameter (km) … 2376","image":"/scale/pluto.webp","imageSource":"https://images.nasa.gov/details/PIA19952","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute","imageLicense":"Public domain (NASA)","imageNote":"Enhanced-colour image"},{"id":"eris","name":"Eris","category":"Dwarf planet","metres":2326000,"basis":"measured","dimension":"diameter","low":2314000,"high":2338000,"sizeLabel":"2,326 km","altLabel":"1,445 miles","measure":"Diameter, from a 2010 stellar occultation","source":"https://www.nature.com/articles/nature10550","sourceLabel":"Sicardy et al. 2011, Nature 478, 493","quote":"The event is consistent with a spherical shape for Eris, with radius 1,163 ± 6 kilometres","image":"/scale/planets/eris.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Eris_and_moon_Dysnomia_JWST_NIRCam.jpg","imageCredit":"NASA/ESA/CSA JWST NIRCam; Ana Carolina de Souza Feliciano et al. & Melina Thévenot","imageLicense":"CC BY-SA 4.0","imageFile":"Eris and moon Dysnomia JWST NIRCam.jpg","imageNote":"Webb telescope image · a point of light with its moon"},{"id":"titania","name":"Titania","category":"Moon of Uranus","metres":1577800.0,"basis":"measured","dimension":"diameter","low":1574200.0,"high":1581400.0,"sizeLabel":"1,578 km","altLabel":"980 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Titania … Mean Radius (km) 788.9 ± 1.8","image":"/scale/planets/titania.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Titania_VGR2_C2684315.png","imageCredit":"zelario12","imageLicense":"CC BY-SA 2.0","imageFile":"Titania VGR2 C2684315.png","imageNote":"Voyager 2 data"},{"id":"rhea","name":"Rhea","category":"Moon of Saturn","metres":1527000.0,"basis":"measured","dimension":"diameter","low":1525800.0,"high":1528200.0,"sizeLabel":"1,527 km","altLabel":"949 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Rhea … Mean Radius (km) 763.50 ± 0.60","image":"/scale/planets/rhea.webp","imageSource":"https://commons.wikimedia.org/wiki/File:PIA07763_Rhea_full_globe5.jpg","imageCredit":"NASA/JPL/Space Science Institute","imageLicense":"Public domain","imageFile":"PIA07763 Rhea full globe5.jpg","imageNote":"Cassini spacecraft"},{"id":"oberon","name":"Oberon","category":"Moon of Uranus","metres":1522800.0,"basis":"measured","dimension":"diameter","low":1517600.0,"high":1528000.0,"sizeLabel":"1,523 km","altLabel":"946 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Oberon … Mean Radius (km) 761.4 ± 2.6","image":"/scale/planets/oberon.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Oberon_in_true_color_by_Kevin_M._Gill.jpg","imageCredit":"Kevin M. Gill","imageLicense":"CC BY 2.0","imageFile":"Oberon in true color by Kevin M. Gill.jpg","imageNote":"Voyager 2 data, true colour"},{"id":"iapetus","name":"Iapetus","category":"Moon of Saturn","metres":1468600.0,"basis":"measured","dimension":"diameter","low":1463000.0,"high":1474200.0,"sizeLabel":"1,469 km","altLabel":"913 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Iapetus … Mean Radius (km) 734.30 ± 2.80","image":"/scale/planets/iapetus.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Iapetus_trailing_natural_color.jpg","imageCredit":"NASA / JPL / SSI / Gordan Ugarkovic","imageLicense":"CC BY-SA 2.5","imageFile":"Iapetus trailing natural color.jpg","imageNote":"Cassini data, natural colour"},{"id":"makemake","name":"Makemake","category":"Dwarf planet","metres":1430000,"basis":"about","dimension":"diameter","minRatio":1.2,"sizeLabel":"About 1,430 km","altLabel":"about 890 miles","measure":"Diameter, from an approximate radius","source":"https://science.nasa.gov/dwarf-planets/makemake/","sourceLabel":"NASA Science","quote":"With a radius of approximately 444 miles (715 kilometers)","image":"/scale/planets/makemake.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Makemake_and_its_moon.jpg","imageCredit":"ESA/Hubble","imageLicense":"CC BY 4.0","imageFile":"Makemake and its moon.jpg","imageNote":"Hubble image · a point of light"},{"id":"charon","name":"Charon","category":"Moon of Pluto","metres":1212000.0,"basis":"measured","dimension":"diameter","low":1211000.0,"high":1213000.0,"sizeLabel":"1,212 km","altLabel":"753 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Charon … Mean Radius (km) 606.0 ± 0.5","image":"/scale/planets/charon.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Charon_in_True_Color_-_High-Res.png","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker","imageLicense":"Public domain","imageFile":"Charon in True Color - High-Res.png","imageNote":"New Horizons spacecraft"},{"id":"umbriel","name":"Umbriel","category":"Moon of Uranus","metres":1169400.0,"basis":"measured","dimension":"diameter","low":1163800.0,"high":1175000.0,"sizeLabel":"1,169 km","altLabel":"727 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Umbriel … Mean Radius (km) 584.7 ± 2.8","image":"/scale/planets/umbriel.webp","imageSource":"https://commons.wikimedia.org/wiki/File:PIA00040_Umbrielx2.47.jpg","imageCredit":"NASA / Jet Propulsion Lab","imageLicense":"Public domain","imageFile":"PIA00040 Umbrielx2.47.jpg","imageNote":"Voyager 2 spacecraft"},{"id":"ariel","name":"Ariel","category":"Moon of Uranus","metres":1157800.0,"basis":"measured","dimension":"diameter","low":1156600.0,"high":1159000.0,"sizeLabel":"1,158 km","altLabel":"719 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Ariel … Mean Radius (km) 578.9 ± 0.6","image":"/scale/planets/ariel.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Ariel_in_monochrome.jpg","imageCredit":"Kevin M. Gill","imageLicense":"CC BY 2.0","imageFile":"Ariel in monochrome.jpg","imageNote":"Voyager 2 data"},{"id":"dione","name":"Dione","category":"Moon of Saturn","metres":1122800.0,"basis":"measured","dimension":"diameter","low":1122000.0,"high":1123600.0,"sizeLabel":"1,123 km","altLabel":"698 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Dione … Mean Radius (km) 561.40 ± 0.40","image":"/scale/planets/dione.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Dione_in_natural_light.jpg","imageCredit":"NASA","imageLicense":"Public domain","imageFile":"Dione in natural light.jpg","imageNote":"Cassini spacecraft"},{"id":"tethys","name":"Tethys","category":"Moon of Saturn","metres":1062200.0,"basis":"measured","dimension":"diameter","low":1061000.0,"high":1063400.0,"sizeLabel":"1,062 km","altLabel":"660 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Tethys … Mean Radius (km) 531.10 ± 0.60","image":"/scale/planets/tethys.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Global_view_of_Tethys_from_Cassini.jpg","imageCredit":"NASA / JPL-Caltech / SSI / Gordan Ugarkovic","imageLicense":"Public domain","imageFile":"Global view of Tethys from Cassini.jpg","imageNote":"Cassini spacecraft"},{"id":"ceres","name":"Ceres","category":"Dwarf planet","metres":939400.0,"basis":"measured","dimension":"diameter","low":939200.0,"high":939600.0,"sizeLabel":"939 km","altLabel":"584 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=1","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 939.4 ± 0.2 km (Nature vol. 537, pp515-517, 2016)","image":"/scale/ceres.webp","imageSource":"https://images.nasa.gov/details/PIA19561","imageCredit":"NASA/JPL-Caltech/UCLA/MPS/DLR/IDA","imageLicense":"Public domain (NASA)","imageNote":"Dawn spacecraft"},{"id":"vesta","name":"Vesta","category":"Asteroid","metres":522770.0,"basis":"measured","dimension":"diameter","low":522669.99999999994,"high":522870.0,"sizeLabel":"523 km","altLabel":"325 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=4","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 522.77 ± 0.1 km (Park et al. 2025, Nature Astronomy)","image":"/scale/planets/vesta.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Vesta_in_natural_color.jpg","imageCredit":"NASA / JPL / MPS / DLR / IDA / Björn Jónsson","imageLicense":"Public domain","imageFile":"Vesta in natural color.jpg","imageNote":"Dawn data, natural colour"},{"id":"pallas","name":"Pallas","category":"Asteroid","metres":513000,"basis":"measured","dimension":"diameter","low":507000,"high":519000,"sizeLabel":"513 km","altLabel":"319 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 513 ± 6 km (Marsset et al., Nature Astronomy 4, 569-576, 2020)","image":"/scale/planets/pallas.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Potw1749a_Pallas_crop.png","imageCredit":"ESO/Vernazza et al.","imageLicense":"CC BY 4.0","imageFile":"Potw1749a Pallas crop.png","imageNote":"Very Large Telescope image"},{"id":"enceladus","name":"Enceladus","category":"Moon of Saturn","metres":504200.0,"basis":"measured","dimension":"diameter","low":503800.0,"high":504600.0,"sizeLabel":"504 km","altLabel":"313 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Enceladus … Mean Radius (km) 252.10 ± 0.20","image":"/scale/planets/enceladus.webp","imageSource":"https://commons.wikimedia.org/wiki/File:PIA17202_-_Approaching_Enceladus.jpg","imageCredit":"National Aeronautics and Space Administration (NASA) / Jet Propulsion Laboratory (JPL)","imageLicense":"Public domain","imageFile":"PIA17202 - Approaching Enceladus.jpg","imageNote":"Cassini spacecraft"},{"id":"miranda","name":"Miranda","category":"Moon of Uranus","metres":471600.0,"basis":"measured","dimension":"diameter","low":470200.0,"high":473000.0,"sizeLabel":"472 km","altLabel":"293 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Miranda … Mean Radius (km) 235.8 ± 0.7","image":"/scale/planets/miranda.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Miranda_mosaic_in_color_-_Voyager_2.png","imageCredit":"zelario12","imageLicense":"CC BY-SA 2.0","imageFile":"Miranda mosaic in color - Voyager 2.png","imageNote":"Voyager 2 mosaic"},{"id":"proteus","name":"Proteus","category":"Moon of Neptune","metres":416000,"basis":"measured","dimension":"diameter","low":400000,"high":432000,"sizeLabel":"416 km","altLabel":"258 miles","measure":"Mean diameter · irregular shape","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Proteus … Mean Radius (km) 208.00 ± 8.00","image":"/scale/planets/proteus.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Proteus_(Voyager_2).jpg","imageCredit":"Voyager 2, NASA","imageLicense":"Public domain","imageFile":"Proteus (Voyager 2).jpg","imageNote":"Voyager 2 spacecraft"},{"id":"mimas","name":"Mimas","category":"Moon of Saturn","metres":396400.0,"basis":"measured","dimension":"diameter","low":395600.0,"high":397200.0,"sizeLabel":"396 km","altLabel":"246 miles","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Mimas … Mean Radius (km) 198.20 ± 0.40","image":"/scale/planets/mimas.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Mimas_Masked.jpg","imageCredit":"NASA / JPL / Space Science Institute","imageLicense":"Public domain","imageFile":"Mimas Masked.jpg","imageNote":"Cassini spacecraft"},{"id":"psyche","name":"Psyche","category":"Asteroid","metres":222000,"basis":"measured","dimension":"diameter","low":221000,"high":226000,"sizeLabel":"222 km","altLabel":"138 miles","measure":"Mean diameter · irregular shape","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=16","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 222 (−1/+4) km (Shepard et al. 2021, The Planetary Science Journal 2, 125)","image":"/scale/planets/psyche.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Psyche_VLT.png","imageCredit":"ESO/Vernazza et al./MISTRAL algorithm (ONERA/CNRS)","imageLicense":"CC BY 4.0","imageFile":"Psyche VLT.png","imageNote":"Very Large Telescope image"},{"id":"phobos","name":"Phobos","category":"Moon of Mars","metres":22160.0,"basis":"measured","dimension":"diameter","low":22080.0,"high":22240.0,"sizeLabel":"22.2 km","altLabel":"13.8 miles","measure":"Mean diameter · irregular shape","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Phobos … Mean Radius (km) 11.08 ± 0.04","image":"/scale/planets/phobos.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Phobos_colour_2008.jpg","imageCredit":"NASA / JPL-Caltech / University of Arizona","imageLicense":"Public domain","imageFile":"Phobos colour 2008.jpg","imageNote":"Mars Reconnaissance Orbiter"},{"id":"eros","name":"Eros","category":"Asteroid","metres":16840.0,"basis":"measured","dimension":"diameter","low":16780.0,"high":16900.0,"sizeLabel":"16.8 km","altLabel":"10.5 miles","measure":"Diameter of a sphere with the same volume · irregular shape","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=433","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 16.84 ± 0.06 km, sphere having the measured volume (Yeomans et al. 2000, Science 289)","image":"/scale/planets/eros.webp","imageSource":"https://commons.wikimedia.org/wiki/File:Eros_-_PIA02923_(color).jpg","imageCredit":"NASA/JPL/JHUAPL (color version published at Planetary Society)","imageLicense":"Public domain","imageFile":"Eros - PIA02923 (color).jpg","imageNote":"NEAR Shoemaker spacecraft"},{"id":"deimos","name":"Deimos","category":"Moon of Mars","metres":12400.0,"basis":"measured","dimension":"diameter","low":11920.0,"high":12880.0,"sizeLabel":"12.4 km","altLabel":"7.7 miles","measure":"Mean diameter · irregular shape","source":"https://ssd.jpl.nasa.gov/sats/phys_par/","sourceLabel":"NASA JPL Solar System Dynamics","quote":"Deimos … Mean Radius (km) 6.2 ± 0.24","image":"/scale/planets/deimos.webp","imageSource":"https://commons.wikimedia.org/wiki/File:NASA-Deimos-MarsMoon-20090221.jpg","imageCredit":"NASA/JPL/University of Arizona","imageLicense":"Public domain","imageFile":"NASA-Deimos-MarsMoon-20090221.jpg","imageNote":"Mars Reconnaissance Orbiter"},{"id":"ryugu","name":"Ryugu","category":"Asteroid","metres":896.0,"basis":"measured","dimension":"diameter","low":892.0,"high":900.0,"sizeLabel":"896 m","altLabel":"2,940 ft","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=162173","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 0.896 ± 0.004 km (Watanabe et al. 2019, Science 364)","image":"/scale/planets/ryugu.webp","imageSource":"https://commons.wikimedia.org/wiki/File:162173_Ryugu_brightened.png","imageCredit":"ISAS/JAXA","imageLicense":"CC BY 4.0","imageFile":"162173 Ryugu brightened.png","imageNote":"Hayabusa2 spacecraft"},{"id":"bennu","name":"Bennu","category":"Asteroid","metres":484.44,"basis":"measured","dimension":"diameter","low":484.14,"high":484.74,"sizeLabel":"484 m","altLabel":"1,589 ft","measure":"Mean diameter","source":"https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=101955","sourceLabel":"NASA JPL Small-Body Database","quote":"diameter 0.48444 ± 0.00030 km (Daly et al. 2020, Science Advances 6)","image":"/scale/bennu.webp","imageSource":"https://science.nasa.gov/resource/bennu-mosaic/","imageCredit":"NASA/Goddard/University of Arizona","imageLicense":"Public domain (NASA)","imageNote":"OSIRIS-REx mosaic"}]}