Messier 109 (also known as NGC 3992 or the Vacuum Cleaner Galaxy) is a barred spiral galaxy exhibiting a weak inner ring structure around the central bar approximately 67.2 ± 23 million light-years [4] away in the northern constellation Ursa Major. M109 can be seen south-east of the star Phecda (γ UMa, Gamma Ursa Majoris).

M109（NGC 3992）是一个位于大熊座的棒旋星系，距离约4,100万光年。 M109是大熊座北星系团中最大的星系，梅西尔108与之伴随。 M109可以经由小望远镜在距天玑（北斗三，大熊座γ）40'，方位角120º的地方找到。

梅西耶109（簡稱m109，亦稱ngc 3992）是一個位於大熊座的棒旋星系，距離約4,100萬光年。 M109是 M109星系團 中最大的星系， 梅西耶108 與之伴隨。 M109可以經由小望遠鏡在距 天璣 （北斗三，大熊座γ）40'，方位角120º的地方找到。

2015年9月26日 · Messier 109 (M109) is a barred spiral galaxy located in the constellation Ursa Major. The galaxy lies at a distance of 83.5 million light years and has an apparent magnitude of 10.6. It has the designation NGC 3992 in the New General Catalogue.

The M109 Group (also known as the NGC 3992 Group or Ursa Major cloud) is a group of galaxies about 55 million light-years away [4] in the constellation Ursa Major. The group is named after the brightest galaxy within the group, the spiral galaxy M109 .

Messier 109, often referred to as M109 or NGC 3992, is a prominent barred spiral galaxy nestled within the constellation Ursa Major, also known as the Great Bear. This object was first sighted by Charles Messier's assistant Pierre M?chain in 1781 and later added to Messier's catalogue.

M109 is a barred spiral galaxy in the constellation of Ursa Major, located within 40 arcmin of the bright, 2.4 magnitude star Phad. It was probably first observed by Mechain in 1781, then by Messier, who recorded it in his personal catalog as M109, but did not include it in the published catalog of 103 objects.

2020年12月17日 · It is the brightest member of the so-called M109 Group and has three bright satellites: UGC 6969, bottom-center, UGC 6940, fainter, located at the right of M109 and UGC 6923, the brightest of the three, located close to the upper right corner. in this image, dozens of background galaxies can be spotted.

Messier 109 or M109 (also designated NGC 3992) is a barred spiral galaxy in the constellation Ursa Major. It has an apparent visual magnitude of 9.8 and its angular diameter is 7x4 arc-minutes. M109 lies at an estimated distance of 55 million light years.

2020年10月1日 · M109 (NGC 3992) 近傍の銀河. 銀河グループをM109の近傍から見ていくと、本体の南から西にかけて、PGC 37553 (UGC 6923, z 0.00350)、PGC 37621 (UGC 6940, z 0.003432)、PGC 37700 (UGC 6969, z 0.003706)があり、これらはM109の伴星雲とされています。 PGC 2438633は赤方偏移の値がかなり大きいので伴星雲ではなさそうです。 その他周囲には微少な銀河が多数存在しますが確実にM109グループで伴星雲とされる物は上記の3つです。 …