Jump to content

ᱵᱷᱩᱛ ᱮᱸᱜᱮᱞ

ᱣᱤᱠᱤᱯᱤᱰᱤᱭᱟ, ᱨᱟᱲᱟ ᱜᱮᱭᱟᱱ ᱯᱩᱛᱷᱤ ᱠᱷᱚᱱ
ᱵᱷᱩᱛ ᱮᱸᱜᱮᱞ ♆
Discovery[᱑]
Discovered by
Discovery date23 September 1846
Designations
Pronunciation /ˈnɛptjn/[᱒]
Named after
Latin Neptūnus, via French Neptune
AdjectivesNeptunian /nɛpˈtjniən/,[᱓] Poseidean[᱔]
Orbital characteristics[᱘][lower-alpha ᱑]
Epoch J2000
Aphelion30.33 AU (4.54 billion km)
Perihelion29.81 AU (4.46 billion km)
30.11 AU (4.50 billion km)
Eccentricity0.009456
367.49 days[᱖]
5.43 km/s[᱖]
256.228°
Inclination1.767975° to ecliptic
6.43° to Sun's equator
0.72° to invariable plane[᱗]
131.784°
276.336°
Known satellites14
Physical characteristics
Mean radius
24,622±19 km[᱙][lower-alpha ᱒]
Equatorial radius
24,764±15 km[᱙][lower-alpha ᱒]
3.883 Earths
Polar radius
24,341±30 km[᱙][lower-alpha ᱒]
3.829 Earths
Flattening0.0171±0.0013
7.6183×109 km2[᱑᱐][lower-alpha ᱒]
14.98 Earths
Volume6.254×1013 km3[᱖][lower-alpha ᱒]
57.74 Earths
Mass1.02413×1026 kg[᱖]
17.147 Earths
5.15 × 10-5 Suns
Mean density
1.638 g/cm3[᱖][lower-alpha ᱓]
11.15 m/s2[᱖][lower-alpha ᱒]
1.14 g
0.23[᱑᱑] (estimate)
23.5 km/s[᱖][lower-alpha ᱒]
0.6713 day[᱖]
16 h 6 min 36 s
Equatorial rotation velocity
2.68 km/s (9,650 km/h)
28.32° (to orbit)[᱖]
North pole right ascension
ᱪᱷᱟᱸᱪ:RA[᱙]
299.3°
North pole declination
42.950°[᱙]
Albedo0.290 (bond)[᱑᱒]
0.442 (geom.)[᱑᱓]
Surface temp. min mean max
1 bar level 72 K (−201 °C)[᱖]
0.1 bar (10 kPa) 55 K (−218 °C)[᱖]
7.67[᱑᱔] to 8.00[᱑᱔]
2.2–2.4″[᱖][᱑᱕]
Atmosphere[᱖]
19.7±0.6 km
Composition by volume

ᱪᱤᱱᱦᱟᱹ: ♆

ᱵᱟᱷᱨᱤ ᱰᱷᱟᱸᱪᱟ[ᱥᱟᱯᱲᱟᱣ | ᱯᱷᱮᱰᱟᱛ ᱥᱟᱯᱲᱟᱣ]

ᱥᱟᱹᱠᱷᱭᱟᱹᱛ[ᱥᱟᱯᱲᱟᱣ | ᱯᱷᱮᱰᱟᱛ ᱥᱟᱯᱲᱟᱣ]

  1. Hamilton, Calvin J. (4 August 2001). "Neptune". Views of the Solar System. Archived from the original on 15 July 2007. Retrieved 13 August 2007.
  2. Walter, Elizabeth (21 April 2003). Cambridge Advanced Learner's Dictionary (2nd ed.). Cambridge University Press. ISBN 978-0-521-53106-1.
  3. "Neptunian". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
  4. "Enabling Exploration with Small Radioisotope Power Systems" (PDF). NASA. September 2004. Archived from the original (PDF) on 22 December 2016. Retrieved 26 January 2016.
  5. Seligman, Courtney. "Rotation Period and Day Length". Archived from the original on 11 August 2011. Retrieved 13 August 2009.
  6. ᱖.᱐᱐ ᱖.᱐᱑ ᱖.᱐᱒ ᱖.᱐᱓ ᱖.᱐᱔ ᱖.᱐᱕ ᱖.᱐᱖ ᱖.᱐᱗ ᱖.᱐᱘ ᱖.᱐᱙ ᱖.᱑᱐ ᱖.᱑᱑ ᱖.᱑᱒ Williams, David R. (1 September 2004). "Neptune Fact Sheet". NASA. Archived from the original on 1 July 2010. Retrieved 14 August 2007.
  7. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 3 April 2009. Archived from the original on 14 May 2009. Retrieved 10 April 2009. (produced with Solex 10 Archived ᱒᱔ ᱢᱮ ᱒᱐᱑᱕ at the Wayback Machine. written by Aldo Vitagliano; see also Invariable plane)
  8. Yeomans, Donald K. "HORIZONS Web-Interface for Neptune Barycenter (Major Body=8)". JPL Horizons On-Line Ephemeris System. Archived from the original on 20 August 2014. Retrieved 18 July 2014.—Select "Ephemeris Type: Orbital Elements", "Time Span: 2000-01-01 12:00 to 2000-01-02". ("Target Body: Neptune Barycenter" and "Center: Solar System Barycenter (@0)".)
  9. ᱙.᱐ ᱙.᱑ ᱙.᱒ ᱙.᱓ ᱙.᱔ ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:Invalid <ref> tag; no text was provided for refs named Seidelmann Archinal A'hearn et al. 2007
  10. ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:Invalid <ref> tag; no text was provided for refs named fact2
  11. de Pater, Imke; Lissauer, Jack J. (2015). Planetary Sciences (2nd updated ed.). New York: Cambridge University Press. p. 250. ISBN 978-0-521-85371-2. Archived from the original on 26 November 2016. Retrieved 17 August 2016.
  12. ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:Invalid <ref> tag; no text was provided for refs named Pearl_et_al_Neptune
  13. ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:Invalid <ref> tag; no text was provided for refs named Mallama_et_al
  14. ᱑᱔.᱐ ᱑᱔.᱑ ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:Invalid <ref> tag; no text was provided for refs named Mallama_and_Hilton
  15. Espenak, Fred (20 July 2005). "Twelve Year Planetary Ephemeris: 1995–2006". NASA. Archived from the original on 5 December 2012. Retrieved 1 March 2008.
ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:<ref> tag defined in <references> has no name attribute.


ᱛᱩᱢᱟᱹᱞ ᱦᱩᱲᱟᱹᱜ:<ref> tags exist for a group named "lower-alpha", but no corresponding <references group="lower-alpha"/> tag was found