Orionova meglica

Orionova meglica
Difuzna meglica
Celotna Orionova meglica v vidni svetlobi
Opazovalni podatki: J2000,0 epoha
Rektascenzija05h 35m 17,1s[1]
Deklinacija-05° 23′ 25″[1]
Oddaljenost1500 sv. l. sv. l.
Navidezni sij (V)+4,0[1]
Navidezni premer (V)65 × 60 arcmin[1]
OzvezdjeOrion
Fizikalne značilnosti
Premer15 sv. l.[2] sv. l.
Absolutni izsev (V)—
Druge značilnostiKopica Trapez
OznakeM42, NGC 1976,
LBN 974
Glej tudi: seznami meglic
Panoramska slika središča meglice, kot jo je novembra 2003 posnel vesoljski teleskop Hubble. Vidno polje obsega približno 2,5 svetlobnih let. Na sredini levo je vidna kopica Trapez. Vir:NASA.

Oriónova meglíca (tudi Velíka meglíca, Oriónov mèč in znana tudi kot Messier 42, M42 ali NGC 1976) je difuzna (emisijska) meglica v ozvezdju Oriona. Verjetno je najsvetlejša difuzna meglica na nebu, vidna s prostim očesom. Zelo dobro je vidna celo v slabših binokularjih.

Meglica je oddaljena od Zemlje 0,49 kpc (1500 sv. l.). Meglico je leta 1610 odkril francoski astronom Nicolas-Claude Fabri de Peiresc, leto kasneje 1611 pa neodvisno od njega švicarski astronom Johann Baptist Cysat, in od tedaj je navduševala ljubitelje nočnega neba in astronome.

Orionova meglica vsebuje mlado razsuto kopico z zelo mladimi zvezdami vrste T-Bika, ki še ne ležijo na glavnemu nizu in se nepravilno spreminjajo. Z novejšimi opazovanji in še posebej s Hubblovim vesoljskim daljnogledom so našli prek 150 zvezd, ki jih obkrožajo svetli prašni obroči. Ti naj bi predstavljali protoplanetne sestave.

Sklici

  1. ↑ 1,0 1,1 1,2 1,3 Popravljeni podatki NGC za NGC 1976 v skladu z NGC/IC Database Files Wolfganga Steinickeja.
  2. ↑ 1500 × sin( 66′ / 2 ) = 14-15 sv. l. premer

Zunanje povezave

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Charles Messier Messierov katalog

M1 M2 M3 M4 M5 M6 M7 M8 M9 M10
M11 M12 M13 M14 M15 M16 M17 M18 M19 M20
M21 M22 M23 M24 M25 M26 M27 M28 M29 M30
M31 M32 M33 M34 M35 M36 M37 M38 M39 M40
M41 M42 M43 M44 M45 M46 M47 M48 M49 M50
M51 M52 M53 M54 M55 M56 M57 M58 M59 M60
M61 M62 M63 M64 M65 M66 M67 M68 M69 M70
M71 M72 M73 M74 M75 M76 M77 M78 M79 M80
M81 M82 M83 M84 M85 M86 M87 M88 M89 M90
M91 M92 M93 M94 M95 M96 M97 M98 M99 M100
M101 M102 M103 M104 M105 M106 M107 M108 M109 M110
     meglice      galaksije (seznam)      dvozvezdja (seznam)
     zvezdne kopice      kopice z meglico      planetarne meglice (seznam)
Glej tudi: seznam Messierovih teles
Drugi katalogi: Novi splošni katalog (NGC)

Koordinati: Sky map 05h 35m 17.3s, −05° 23′ 28″

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