Nẹ́ptúnù

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Nẹ́ptúnù - Neptune  Astronomical symbol for Neptune.
Neptune from Voyager 2
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 Gbígbọ́i /ˈnɛptn/[2]
Alápèjúwe Neptunian
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 (Àdàkọ:Convert/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 (?)

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


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Hamilton, Calvin J. (August 4, 2001). "Neptune". Views of the Solar System. http://www.solarviews.com/eng/neptune.htm. 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. 
  3. Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. http://ssd.jpl.nasa.gov/?horizons. Retrieved August 8, 2007. —At the site, go to the "web interface" then select "Ephemeris Type: Elements", "Target Body: Neptune Barycenter" and "Center: Sun".
  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.
  5. 5.0 5.1 Cite error: Invalid <ref> tag; no text was provided for refs named fact2
  6. Seligman, Courtney. "Rotation Period and Day Length". http://cseligman.com/text/sky/rotationvsday.htm. Retrieved August 13, 2009. 
  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. http://nssdc.gsfc.nasa.gov/planetary/factsheet/neptunefact.html. Retrieved August 14, 2007. 
  8. "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". April 3, 2009. Archived from the original on April 20, 2009. http://web.archive.org/20090420194536/home.comcast.net/~kpheider/MeanPlane.gif. Retrieved April 10, 2009.  (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane)
  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. 
  10. 10.0 10.1 10.2 10.3 10.4 10.5 10.6 Refers to the level of 1 bar (Àdàkọ:Convert/kPa) atmospheric pressure
  11. 11.0 11.1 Cite error: Invalid <ref> tag; no text was provided for refs named ephemeris