Nẹ́ptúnù

Nẹ́ptúnù ni kejo ti eyi tojinajulo si Orun ninu Sistemu Orun.

Nẹ́ptúnù - Neptune  

Neptune from Voyager 2 with Great Dark Spot at left
Ìkọ́kọ́wárí
Kíkọ́kọ́wárí látọwọ́	Urbain Le Verrier John Couch Adams Johann Galle
Ọjọ́ ìkọ́kọ́wárí	September 23, 1846[1]
Ìfúnlọ́rúkọ
Ìpolongo	i /ˈnɛptuːn/[2]
Alápèjúwe	Neptunian
Àwọn ìhùwà ìgbàyípo[3][4]
Àsìkò J2000
Aphelion	4,553,946,490 km 30.44125206 AU
Perihelion	4,452,940,833 km 29.76607095 AU
Semi-major axis	4,503,443,661 km 30.10366151 AU
Eccentricity	0.011214269
Àsìkò ìgbàyípo	60,190[5] days 164.79 years 89,666 Neptune solar days[6]
Synodic period	367.49 day[7]
Average orbital speed	5.43 km/s[7]
Mean anomaly	267.767281°
Inclination	1.767975° to Ecliptic 6.43° to Sun’s equator 0.72° to Invariable plane[8]
Longitude of ascending node	131.794310°
Argument of perihelion	265.646853°
Satellites	13
Àwọn ìhùwà àdánidá
Ìfẹ̀kiri alágedeméjì	24,764 ± 15 km[9][10] 3.883 Earths
Ìfẹ̀kiri olóòpó	24,341 ± 30 km[9][10] 3.829 Earths
Flattening	0.0171 ± 0.0013
Ààlà ojúde	7.6183 × 109 km2[5][10] 14.98 Earths
Ìpọ̀sí	6.254 × 1013 km3[7][10] 57.74 Earths
Àkójọ	1.0243×1026 kg[7] 17.147 Earths
Iyeìdáméjì ìṣùpọ̀	1.638 g/cm3[7][10]
Equatorial surface gravity	11.15 m/s2[7][10] 1.14 g
Escape velocity	23.5 km/s[7][10]
Sidereal rotation period	0.6713 day[7] 16 h 6 min 36 s
Equatorial rotation velocity	2.68 km/s 9,660 km/h
Axial tilt	28.32°[7]
North pole right ascension	19h 57m 20s[9] 299.3°
North pole declination	42.950°[9]
Albedo	0.290 (bond) 0.41 (geom.)[7]
Ìgbónásí ojúde    1 bar level    0.1 bar (10 kPa)	min mean max 72 K[7] 55 K[7]
Apparent magnitude	8.02 to 7.78[7][11]
Angular diameter	2.2″–2.4″[7][11]
Afẹ́fẹ́àyíká[7]
Ìga òṣùwọ̀n	19.7 ± 0.6 km
Ìkósínú	80±3.2% Hydrogen (H2) 19±3.2% Helium 1.5±0.5% Methane ~0.019% Hydrogen deuteride (HD) ~0.00015% Ethane Ices: Ammonia Water Ammonium hydrosulfide(NH4SH) Methane (?)