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Messier 9

Izvor: Wikipedija

M 9
Messier 9
Otkriće
Položaj
Epoha J2000
Zviježđe Zmijonosac
Udaljenost 26,000 ly  (8,000 pc)
Rektascenzija 17h 19m 12.0s
Deklinacija -18° 31′ 00.0″
Izgled na našem nebu
Prividna magnituda 7.90
Prividne dimenzije (V) 12.0' x 12.0'
Stvarne osobine objekta
Ostalo
Druge oznake NGC 6333


Messier 9 (M9 ili NGC 6333) je Kuglasti skup u Zmijonoscu, pripada u originalna otkrića Charlesa Messiera. Otkrio ga je 28. svibnja 1764. i opisao kao maglicu bez zvijezda s promjerom od 3'. U zvijezde ga je prvi razlučio William Herschel oko 20 godina kasnije.

Svojstva

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Messier 9 se nalazi 26,000 ly od Zemlje i samo 5,500 ly od središta naše galaksije. Njegov prividni promjer je 12' što znači da njegov stvarni promjer iznosi 90 ly. Sjeverni i zapadni rubovi su zaklonjeni oblakom prašine koji se nalazi u doglednici.

Messier 9 udaljava se od nas velikom brzinom od 224km/s. Siromašan je promjenjivim zvijezdama, tek 13 ih je otkriveno.

Amaterska promatranja

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Messier 9 se može vidjeti u dvogledu kao mala mutna zvijezda. Zbog velike udaljenosti i međuzvijezdane prašine, najsjajnije zvijezde u skupu imaju prividan sjaj od +13.5 magnituda. Većina zvijezda ima još slabiji sjaja, +16.2. Teleskop s objektivom od 100 mm u stanju je pokazati središnje dijelove skupa, za razlučivanje zvijezda potreban je barem 150 mm objektiv. Veći teleskopi, s zrcalima od 250 mm i više, u stanju su razlučiti i jezgru skupa.

Eksterni linkovi

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Objekti u Messierovom katalogu
M1M2M3M4M5M6M7M8M9M10M11M12M13M14M15M16M17M18M19M20M21M22M23M24M25M26M27M28M29M30M31M32M33M34M35M36M37M38M39M40M41M42M43M44M45M46M47M48M49M50M51M52M53M54M55M56M57M58M59M60M61M62M63M64M65M66M67M68M69M70M71M72M73M74M75M76M77M78M79M80M81M82M83M84M85M86M87M88M89M90M91M92M93M94M95M96M97M98M99M100M101M102M103M104M105M106M107M108M109M110
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Messier 9
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