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Messier 70

Izvor: Wikipedija

M 70
Kuglasti skup M70.
Otkriće
Položaj
Epoha J2000
Zviježđe Strijelac
Udaljenost 29,300 ly  (9,000 pc)
Rektascenzija 18h 43m 12.0s
Deklinacija -32° 18′ 00.0″
Izgled na našem nebu
Prividna magnituda 8.10
Prividne dimenzije (V) 8' x 8'
Stvarne osobine objekta
Ostalo
Druge oznake NGC 6681


Messier 70 (M70 ili NGC 6681) jedan je od tamnijih kuglastih skupova u Messierovom katalogu. Skup je otkrio Charles Messier 31. kolovoza 1780. godine i opisao ga kao "maglicu bez zvijezda". Skup je prvi na zvijezde razlučio William Herschel.

Svojstva

[uredi | uredi kod]

M70 nalazi se blizu M69, tek je 1800 ly udaljen od njega. M70 je nešto manji i nešto bliži od M69. M70 nalazi se 29,300 ly, promjer mu je 68 ly, a prividan promjer je oko 8'. Jezgra skupa je vjerojatno proživjela urušavanje i zato je veoma gusta i kompaktna. Skup sadrži samo dvije promjenjive zvijezde. M70 se od nas udaljava brzinom od 200 km/s.

M70 je postao slavan kada su Alan Hale i Thomas Bopp promatrali 1995. godine. Pritom su otkrili komet Hale-Bopp.

Amaterska promatranja

[uredi | uredi kod]

M70 je nešto tamniji od M69. Prividni sjaj M70 je + 7.9 magnituda. Nalazi se na velikoj južnoj deklinaciji što otežava njegovo promatranje iz naših krajeva. U 200 mm teleskop skup se jedva vidi kao okrugla maglica.


Objekti u Messierovom katalogu
M1M2M3M4M5M6M7M8M9M10M11M12M13M14M15M16M17M18M19M20M21M22M23M24M25M26M27M28M29M30M31M32M33M34M35M36M37M38M39M40M41M42M43M44M45M46M47M48M49M50M51M52M53M54M55M56M57M58M59M60M61M62M63M64M65M66M67M68M69M70M71M72M73M74M75M76M77M78M79M80M81M82M83M84M85M86M87M88M89M90M91M92M93M94M95M96M97M98M99M100M101M102M103M104M105M106M107M108M109M110
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Messier 70
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