Ganymede

Ganymede, Brahaspati ke chaand hae aur Saur Mandal ke sab se barraa hae. Saturn ke sab se barraa chaand, Titan ke rakam, ii grah p Mercury se barraa hae, lekin iske surface gravity Mercury, Io, aur Chandarma se kamti hae, iske kamti density ke kaaran.^[18] Ganymede, Brahaspati ke lagbhag hae saat din orbit kare hae aur ii 1:2:4 orbital resonance me chaand Europa aur Io se hae.

1. "'Tros Crater, Ganymede – PJ34-1 Detail' |".
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Ganymede

Ganymede, sachchaa rang me, jiske Juno spacecraft June 2021 me utaris rahaa[1]
Discovery[2][3]
Discovered by	Galileo Galilei Simon Marius
Discovery date	January 7, 1610
Designations
Pronunciation	/ˈɡænɪmiːd/ gan-IM-eed[4]
Named after	Γανυμήδης, Ganymēdēs
Alternative names	Jupiter Template:Rn
Adjectives	Ganymedian,[5] Ganymedean[6][7] (/ˌɡænəˈmiːdi.ən/)
Orbital characteristics
Periapsis	1069200 km
Apoapsis	1071600 km
Semi-major axis	1070400 km[8]
Eccentricity	0.0013[8]
Orbital period (sidereal)	7.15455296 d[8]
Average orbital speed	10.880 km/s
Inclination	2.214° (to the ecliptic) 0.20° (to Jupiter's equator)[8]
Satellite of	Jupiter
Group	Galilean moon
Physical characteristics
Mean radius	2634.1±0.3 km (0.413 Earths)[9]
Surface area	8.72×107 km2 (0.171 Earths)
Volume	7.66×1010 km3 (0.0704 Earths)[lower-alpha 1]
Mass	1.4819×1023 kg (0.025 Earths)[9]
Mean density	1.936 g/cm3 (0.351 Earths)[9]
Surface gravity	1.428 m/s2 (0.146 g)[lower-alpha 2]
Moment of inertia factor	0.3115±0.0028[10]
Escape velocity	2.741 km/s[lower-alpha 3]
Synodic rotation period	synchronous
Axial tilt	0–0.33°[11] (to Jupiter's equator)
North pole right ascension	268.20°[12]
North pole declination	64.57°[12]
Albedo	0.43±0.02[13]
Surface temp. min mean max K 70[14] 110[14] 152[15] °C −203 −163 −121
Apparent magnitude	4.61 (opposition)[13] 4.38 (in 1951)[16]
Angular diameter	1.2 to 1.8 arcseconds
Atmosphere
Surface pressure	0.2–1.2 μPa (1.97×10−12–1.18×10−11 atm)[17]
Composition by volume	mostly oxygen[17]