Solar System by apparent size

Objects with angular diameters greater than about 1 to 1/2 of an arcsecond and transiting satellites with angular diameters greater than about 1/2 to 1/4 of an arcsecond can theoretically be resolved by amateur telescopes under ideal seeing conditions.

minimum angular diameters

0. 180°, Planet Terra
1. (31.477633133877767054679096275868 ± 0.0029551128269606612047486105298695)', Star Sol
2. (29.819303636472614445417667957098 ± 0.0096862578055441211945453588402752)', Terran Satellite Luna
3. (33.159669076755426476443372392270 ± 0.0089971814843987142886486730713841)", Planet Jupiter
4. (14.678686960924656270109313417449 ± 0.0049094002655546655235419837164275)", Planet Saturn
5. (13.344787507099331456628082902984 ± 0.0022051026964193540301592173017059)", Planet Venus
6. (6.0096928766403224966258023933195 ± 0.00068019592882980055537539875878304)", Planet Mercury
7. (4.7698865620477542663584032367593 ± 0.00014196624060303258751810475960605)", Planet Mars
8. (3.4223653325507628807299127059015 ± 0.0027408759060746596099586009009516)", Planet Uranus
9. (2.2118336467437559427103793771768 ± 0.0028217055150323473146748236149033)", Planet Neptune
10. (1.3083628992194648224762369447488 ± 0.00014901868607682720204612762319518)", Jovian Satellite Ganymede
11. (1.1973524061827979954954456275039 ± 0.00074514868136640627492683703515084)", Jovian Satellite Callisto
12. (0.90220478385668260139264206458912 ± 0.00074600044303443443093994586958067)", Jovian Satellite Io
13. (0.77505471560751979803462664785578 ± 0.00024828953386270602828053296700135)", Jovian Satellite Europa
14. (0.69779167912007910714815231706525 ± 0.000024814241932850107938927799477864)", Saturnian Satellite Titan

maximum angular diameters

0. 180°, Planet Terra
1. (34.142318167779726305388597288522 ± 0.0099504175490098189823746848993722)', Terran Satellite Luna
2. (32.549089711594099381629815789191 ± 0.0030383154609148420537653582447128)', Star Sol
3. (1.0905870349499817398048629211605 ± 0.00018025944492847952922209945619809)', Planet Venus
4. (50.115577292011611607058157849591 ± 0.00072639900116543009038607598428538)", Planet Jupiter
5. (25.700544451492779197449676308284 ± 0.00089158765308439455528175641371082)", Planet Mars
6. (20.710741843720512704721266748230 ± 0.0005166370410419963595958474095447)", Planet Saturn
7. (13.026519404358484128366613475607 ± 0.00068880719717083531267935096847384)", Planet Mercury
8. (4.0813037952907347294343994483903 ± 0.0006389298287894383982434815333879)", Planet Uranus
9. (2.3717005756662317185122893669135 ± 0.0023358462167698838697425224493574)", Planet Neptune
10. (1.8500081168516263639525877660944 ± 0.00021081697115976641880998036484687)", Jovian Satellite Ganymede
11. (1.6950999034452036167094676830048 ± 0.0010549338656223241325822742019151)", Jovian Satellite Callisto
12. (1.2758186006115165938918458891654 ± 0.000035409569728211189330416823094472)", Jovian Satellite Io
13. (1.0956010972639616311861538720115 ± 0.00035099902326891557679784173552623)", Jovian Satellite Europa
14. (0.92630435820787173323928340729414 ± 0.0059958010235239682526821091198236)", Minor Planet Ceres
15. (0.88573281563080150908143581596940 ± 0.00003509052596514345590963105473037)", Saturnian Satellite Titan
16. (0.75246410914813015641116728905938 ± 0.016972874643896973338196523745709)", Minor Planet Pallas
17. (0.69117155722191649628751546195186 ± 0.00012417891897229293892065704030910)", Minor Planet Vesta

• (0.26224700443933629069282618928564 ± 0.000017870938636195757578407958897337)", Saturnian Satellite Rhea
• (0.25714234397864741689302828177689 ± 0.000017891855224446917628298178731762)", Saturnian Satellite Iapetus

catalog

Number of Solar System objects by minimum angular diameter:

• 8 objects (1 star, 6 planets, and 1 moon) are always at least 4 arcseconds in angular diameter.
• 10 objects (1 star, 8 planets, and 1 moon) are always at least 2 arcseconds in angular diameter.
• 12 objects (1 star, 8 planets, and 3 moons) are always at least 1 arcsecond in angular diameter.
• 15 objects (1 star, 8 planets, and 6 moons) are always at least 0.5 arcseconds in angular diameter.

Number of Solar System objects by maximum angular diameter:

• 9 objects (1 star, 7 planets, and 1 moon) can be at least 4 arcseconds in angular diameter.
• 10 objects (1 star, 8 planets, and 1 moon) can be at least 2 arcseconds in angular diameter.
• 14 objects (1 star, 8 planets, and 5 moons) can be at least 1 arcsecond in angular diameter.
• 18 objects (1 star, 8 major planets, 3 minor planets, and 6 moons) can be at least 0.5 arcseconds in angular diameter.

see also

• Solar System data