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Afọ ndị dị n'ime ala

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sidereal yAear ( , ;  ), nke a na akpọkwa oge okirikiri akụkụ akụkụ, bụ oge ụwa ma ọ bụ ahụ mbara ala ọzọ na ewe iji gbaa anyanwụ gburugburu otu ugboro n'ihe gbasara kpakpando edobere.

Ya mere, maka Ụwa, ọ bụkwa oge ọ na ewe ka Anyanwụ laghachi n'otu ọnọdụ ahụ n'ihe gbasara Ụwa n'ihe banyere kpakpando ndị kwụ ọtọ mgbe o doro anya na ọ na agagharị otu ugboro gburugburu ecliptic.

Ọ bụ ụbọchị 365,256,363,004 ephemeris maka oge J2000.0. [1] Afọ sidereal [2] iche na afọ anyanwụ, "oge achọrọ maka longitude ecliptic nke Anyanwụ iji mụbaa ogo 360", [1] n'ihi precession nke equinoxes.Afọ sidereal bụ 20 min 24.5 s ogologo karịa nkezi afọ okpomọkụ na J2000.0 (365.242 190 402 ephemeris ụbọchị). [1]  

Ka ọ dị ugbu a, ọnụego nke Axial precession kwekọrọ na oge nke afọ 25,772, yabụ afọ sidereal dị ogologo karịa Afọ okpomọkụ site na sekọnd 1,224.5 (20 min 24.5 s, ~ 365.24219*86400/25772).

Tupu nchọpụta nke precession nke equinoxes site [1] Hipparchus n'oge Hellenistic, a maghị ọdịiche dị n'etiti afọ sidereal na nke okpomọkụ. Maka anya nkịtị, mgbanwe nke ìgwè kpakpando ndị metụtara equinoxes na apụta ìhè naanị ọtụtụ narị afọ ma ọ bụ "afọ", na kalenda ndị dị tupu oge a dị ka Ọrụ na Ụbọchị Hesiod ga enye oge nke afọ maka ịgha mkpụrụ, owuwe ihe ubi, na ihe ndị ọzọ site na ịkọwapụta ọhụụ mbụ nke kpakpando, n'ụzọ dị irè site na iji afọ sidereal.   [citation needed] Kalenda mba India, dabere na ọrụ nke Maga Brahmins, dị ka kalenda nke mba ndị gbara ya gburugburu, a na agụkarị ya site na ntinye anyanwụ n'ime akara nke Aries ma kwesịkwa ka ọ kwekọọ na equinox nke oge opupu ihe ubi ma nwee mkpa maka oge owuwe ihe ubi na ịkụ osisi na ya mere afọ okpomọkụ.   ['citation needed]">citation needed] Otú ọ dị, ka ịbanye n'ime ìgwè kpakpando na-eme ụbọchị 25 ka e mesịrị, dị ka ngụkọta nke afọ sidereal si dị, ụbọchị a na egosi Afọ Ọhụrụ nke South na South East Asia na mba na ọdịbendị ndị ọzọ. [Ihe e dere n'ala ala peeji] 

Hụkwa[dezie | dezie ebe o si]

  • Afọ na-adịghị mma
  • Afọ Gaussian
  • Afọ Julian (ihe ọmụmụ mbara igwe)
  • Oge Orbital
  • Nkwụsị nke § Nkà mmụta mbara igwe
  • Oge ihu igwe
  • Kalenda anyanwụ
  • Afọ okpomọkụ
  • Oge Mars

Ihe edeturu[dezie | dezie ebe o si]

  1. Stern (October 10, 2016). Precession. NASA's Polar, Wind and Geotail Site. Retrieved on April 25, 2022.

Ọrụ ndị e depụtara[dezie | dezie ebe o si]

  • (2016) "Glossary", Astronomical Almanac for the Year 2017. Washington, D.C., and London: United States Naval Observatory, HM Nautical Almanac Office. 
  • Useful Constants. International Earth rotation and Reference systems Service (IERS) (February 13, 2014). Retrieved on February 29, 2020.

Àtụ:Time topicsÀtụ:Time measurement and standards