ᱵᱷᱩᱛ ᱮᱸᱜᱮᱞ

ᱣᱤᱠᱤᱯᱤᱰᱤᱭᱟ, ᱨᱟᱲᱟ ᱜᱮᱭᱟᱱ ᱯᱩᱛᱷᱤ ᱠᱷᱚᱱ
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Neptune Neptune symbol.svg
Neptune - Voyager 2 (29347980845) flatten crop.jpg
Photograph taken by NASA's Voyager 2 in 1989
Discovery[᱑]
Discovered by
Discovery date 23 September 1846
Designations
Pronunciation /ˈnɛptjn/[᱒]
Named after
Latin Neptūnus, via French Neptune
Adjectives Neptunian /nɛpˈtjniən/,[᱓] Poseidean[᱔]
Orbital characteristics[᱘][lower-alpha ᱑]
Epoch J2000
Aphelion 30.33 AU (4.54 billion km)
Perihelion 29.81 AU (4.46 billion km)
30.11 AU (4.50 billion km)
Eccentricity 0.009456
367.49 days[᱖]
5.43 km/s[᱖]
256.228°
Inclination 1.767975° to ecliptic
6.43° to Sun's equator
0.72° to invariable plane[᱗]
131.784°
276.336°
Known satellites 14
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
Flattening 0.0171±0.0013
7.6183×109 km2[᱑᱐][lower-alpha ᱒]
14.98 Earths
Volume 6.254×1013 km3[᱖][lower-alpha ᱒]
57.74 Earths
Mass 1.02413×1026 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]
Albedo 0.290 (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

ᱵᱟᱷᱨᱤ ᱰᱷᱟᱸᱪᱟ[ᱥᱟᱯᱲᱟᱣ | ᱯᱷᱮᱰᱟᱛ ᱥᱟᱯᱲᱟᱣ]

ᱥᱟᱹᱠᱷᱭᱟᱹᱛ[ᱥᱟᱯᱲᱟᱣ | ᱯᱷᱮᱰᱟᱛ ᱥᱟᱯᱲᱟᱣ]

  1. Hamilton, Calvin J. (4 ᱚᱜᱚᱥᱴ 2001). "Neptune". Views of the Solar System. Archived from the original on 15 ᱡᱩᱞᱟᱭ 2007. Retrieved 13 ᱚᱜᱚᱥᱴ 2007.  Unknown parameter |url-status= ignored (help)
  2. Walter, Elizabeth (21 ᱮᱯᱨᱤᱞ 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. ᱥᱮᱯᱴᱮᱢᱵᱚᱨ 2005.  (Subscription or UK public library membership required.)
  4. "Enabling Exploration with Small Radioisotope Power Systems" (PDF). NASA. ᱥᱮᱯᱴᱮᱢᱵᱚᱨ 2004. Archived from the original (PDF) on 22 ᱰᱤᱥᱮᱢᱵᱚᱨ 2016. Retrieved 26 ᱡᱟᱱᱩᱣᱟᱨᱤ 2016.  Unknown parameter |url-status= ignored (help)
  5. Seligman, Courtney. "Rotation Period and Day Length". Archived from the original on 11 ᱚᱜᱚᱥᱴ 2011. Retrieved 13 ᱚᱜᱚᱥᱴ 2009.  Unknown parameter |url-status= ignored (help)
  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 ᱥᱮᱯᱴᱮᱢᱵᱚᱨ 2004). "Neptune Fact Sheet". NASA. Archived from the original on 1 ᱡᱩᱞᱟᱭ 2010. Retrieved 14 ᱚᱜᱚᱥᱴ 2007.  Unknown parameter |url-status= ignored (help)
  7. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 3 ᱮᱯᱨᱤᱞ 2009. Archived from the original on 14 ᱢᱮ 2009. Retrieved 10 ᱮᱯᱨᱤᱞ 2009.  Unknown parameter |url-status= ignored (help) (produced with Solex 10 ᱞᱩᱣ ᱦᱩᱲᱟᱹᱜ: bad argument #2 to 'formatDate' (not a valid timestamp) 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 ᱚᱜᱚᱥᱴ 2014. Retrieved 18 ᱡᱩᱞᱟᱭ 2014.  Unknown parameter |url-status= ignored (help)—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 ᱱᱚᱵᱷᱮᱢᱵᱚᱨ 2016. Retrieved 17 ᱚᱜᱚᱥᱴ 2016.  Unknown parameter |url-status= ignored (help)
  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 ᱡᱩᱞᱟᱭ 2005). "Twelve Year Planetary Ephemeris: 1995–2006". NASA. Archived from the original on 5 ᱰᱤᱥᱮᱢᱵᱚᱨ 2012. Retrieved 1 ᱢᱟᱨᱪ 2008.  Unknown parameter |url-status= ignored (help)
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