Nẹ́ptúnù

**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
Ìfúnlọ́rúkọ
Ìpolongo	i /ˈnɛptuːn/
Alápèjúwe	Neptunian
Àwọn ìhùwà ìgbàyípo
	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 days; 164.79 years; 89,666 Neptune solar days
Synodic period	367.49 day
Average orbital speed	5.43 km/s
Mean anomaly	267.767281°
Inclination	1.767975° to Ecliptic; 6.43° to Sun’s equator; 0.72° to Invariable plane
Longitude of ascending node	131.794310°
Argument of perihelion	265.646853°
Satellites	13
Àwọn ìhùwà àdánidá
Ìfẹ̀kiri alágedeméjì	24,764 ± 15 km; 3.883 Earths
Ìfẹ̀kiri olóòpó	24,341 ± 30 km; 3.829 Earths
Flattening	0.0171 ± 0.0013
Ààlà ojúde	7.6183 × 109 km2; 14.98 Earths
Ìpọ̀sí	6.254 × 1013 km3; 57.74 Earths
Àkójọ	1.0243×1026 kg; 17.147 Earths
Iyeìdáméjì ìṣùpọ̀	1.638 g/cm3
Equatorial surface gravity	11.15 m/s2; 1.14 g
Escape velocity	23.5 km/s
Sidereal rotation; period	0.6713 day; 16 h 6 min 36 s
Equatorial rotation velocity	2.68 km/s; 9,660 km/h
Axial tilt	28.32°
North pole right ascension	19h 57m 20s; 299.3°
North pole declination	42.950°
Albedo	0.290 (bond); 0.41 (geom.)
Apparent magnitude	8.02 to 7.78
Angular diameter	2.2″–2.4″
Afẹ́fẹ́àyíká
Ìga òṣùwọ̀n	19.7 ± 0.6 km
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 (?)

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

Àyọkà yìí tàbí apá rẹ̀ únfẹ́ àtúnṣe sí.

Ẹ le fẹ̀ jù báyìí lọ tàbí kí ẹ ṣàtúnṣe rẹ̀ lọ́nà tí yíò mu kúnrẹ́rẹ́. Ẹ ran Wikipedia lọ́wọ́ láti fẹ̀ẹ́ jù báyìí lọ.

Itokasi

↑ Hamilton, Calvin J. (August 4, 2001). "Neptune". Views of the Solar System. Retrieved August 13, 2007.
↑ Walter, Elizabeth (April 21, 2003). Cambridge Advanced Learner's Dictionary (2nd ed.). Cambridge University Press. ISBN 0-521-53106-3.
↑ Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. Retrieved August 8, 2007. —At the site, go to the "web interface" then select "Ephemeris Type: Elements", "Target Body: Neptune Barycenter" and "Center: Sun".
↑ Orbital elements refer to the barycentre of the Neptune system, and are the instantaneous osculating values at the precise J2000 epoch. Barycentre quantities are given because, in contrast to the planetary centre, they do not experience appreciable changes on a day-to-day basis from to the motion of the moons.
↑ ^5.0 ^5.1 Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named fact2
↑ Seligman, Courtney. "Rotation Period and Day Length". Retrieved August 13, 2009.
↑ ^7.00 ^7.01 ^7.02 ^7.03 ^7.04 ^7.05 ^7.06 ^7.07 ^7.08 ^7.09 ^7.10 ^7.11 ^7.12 ^7.13 ^7.14 Williams, David R. (September 1, 2004). "Neptune Fact Sheet". NASA. Retrieved August 14, 2007.
↑ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". April 3, 2009. Archived from the original on April 20, 2009. Retrieved April 10, 2009. (produced with Solex 10 Archived 2015-05-24 at the Wayback Machine. written by Aldo Vitagliano; see also Invariable plane)
↑ ^9.0 ^9.1 ^9.2 ^9.3 P. Kenneth, Seidelmann; Archinal, B. A.; A’hearn, M. F. et al. (2007). "Report of the IAU/IAGWorking Group on cartographic coordinates and rotational elements". Celestial Mechanics and Dynamical Astronomy 90 (3): 155–180. Bibcode 2007CeMDA..98..155S. doi:10.1007/s10569-007-9072-y.
↑ ^10.0 ^10.1 ^10.2 ^10.3 ^10.4 ^10.5 ^10.6 Refers to the level of 1 bar (100 kPa) atmospheric pressure
↑ ^11.0 ^11.1 Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named ephemeris

[Hamilton-1] Hamilton, Calvin J. (August 4, 2001). "Neptune". Views of the Solar System. Retrieved August 13, 2007.

[2] Walter, Elizabeth (April 21, 2003). Cambridge Advanced Learner's Dictionary (2nd ed.). Cambridge University Press. ISBN 0-521-53106-3.

[horizons-3] Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. Retrieved August 8, 2007. —At the site, go to the "web interface" then select "Ephemeris Type: Elements", "Target Body: Neptune Barycenter" and "Center: Sun".

[barycentre-4] Orbital elements refer to the barycentre of the Neptune system, and are the instantaneous osculating values at the precise J2000 epoch. Barycentre quantities are given because, in contrast to the planetary centre, they do not experience appreciable changes on a day-to-day basis from to the motion of the moons.

[fact2-5] 5.0 ^5.1 Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named fact2

[planet_years-6] Seligman, Courtney. "Rotation Period and Day Length". Retrieved August 13, 2009.

[fact-7] 7.00 ^7.01 ^7.02 ^7.03 ^7.04 ^7.05 ^7.06 ^7.07 ^7.08 ^7.09 ^7.10 ^7.11 ^7.12 ^7.13 ^7.14 Williams, David R. (September 1, 2004). "Neptune Fact Sheet". NASA. Retrieved August 14, 2007.

[meanplane-8] "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". April 3, 2009. Archived from the original on April 20, 2009. Retrieved April 10, 2009. (produced with Solex 10 Archived 2015-05-24 at the Wayback Machine. written by Aldo Vitagliano; see also Invariable plane)

[Seidelmann2007-9] 9.0 ^9.1 ^9.2 ^9.3 P. Kenneth, Seidelmann; Archinal, B. A.; A’hearn, M. F. et al. (2007). "Report of the IAU/IAGWorking Group on cartographic coordinates and rotational elements". Celestial Mechanics and Dynamical Astronomy 90 (3): 155–180. Bibcode 2007CeMDA..98..155S. doi:10.1007/s10569-007-9072-y.

[1bar-10] 10.0 ^10.1 ^10.2 ^10.3 ^10.4 ^10.5 ^10.6 Refers to the level of 1 bar (100 kPa) atmospheric pressure

[ephemeris-11] 11.0 ^11.1 Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named ephemeris

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