Also known as Keenan's system (for its discoverer) and Arp 104, the interacting galaxy pair is some 17 million light-years away in the constellation Ursa Major. The debris trail that joins them, along with NGC 5218's comma-shaped extension and the distorted arms of NGC 5216, are a consequence of mutual gravitational tides.

NGC 5218 is a Barred Spiral Galaxy located in the constellation of Ursa Major in the northern hemisphere. NGC 5218's distance from Earth is 167,709,609.41 light years. NGC 5218 is called NGC 5218 in the New General Catalogue (NGC).

NGC 5218 is a Barred Spiral Galaxy in the Ursa Major constellation. NGC 5218 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.

2020年6月30日 · Arp 104, also known as Keenan’s System, consists of the two spiral galaxies NGC 5216 (bottom) and NGC 5218 (top). The two are connected by a thin stream of gas, in which new stars are forming. The stream was created when the two galaxies passed by each other, their mutual gravity pulling the gas out.

2023年8月16日 · Based on a recessional velocity of 2935 km/sec, NGC 5218 is about 130 million light years away, in fair agreement with a redshift-independent distance of 165 million light years.

2020年2月5日 · Also known as Keenan's system (for its discoverer) and Arp 104, the interacting galaxy pair is some 17 million light-years away in the constellation Ursa Major. The debris trail that joins them, along with NGC 5218's comma-shaped extension and the distorted arms of NGC 5216, are a consequence of mutual gravitational tides.

The debris trail that joins them, along with NGC 5218's comma-shaped extension and the distorted arms of NGC 5216 are a consequence of mutual gravitational tides that disrupt the galaxies as they repeatedly swing close to one another. Drawn out over billions of years, the encounters will likely result in their merger into a single galaxy of stars.

2016年5月22日 · Arp 104 is made up of NGC 5216 and NGC 5218. NGC 5216 is Magnitude 12.6 and is 1.8'x1.2'. NGC 5218 is slightly larger and brighter at Magnitude 12.3 and 1.8x1.3. (TheSkyX) They are a physical pair thought to be about 17 million light-years distant [note there are other estimates that put them considerably further away].

2010年9月1日 · Arp 104 is a pair of luminous interacting galaxies consisting of NGC 5216, an elliptical, and NGC 5218, a disturbed disk galaxy and joined by a stellar bridge. We obtained optical imaging to support photometric and color studies of the system.

2014年4月9日 · The masses of the galaxies, their intrinsic internal structures, and their relative velocities (timescales) ultimately determine the resulting structure of the interaction.In this example NGC 5216 (top) and NGC 5218 (below) have luminous debris connecting them across a distance that is no less than 22,000 lightyears.