IC 4263 an edge-on

barred spiral galaxy A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in about two thirds of all spiral galaxies in the local universe, and generally affect both the motions of stars and interstellar gas ...

in the constellation

Canes Venatici Canes Venatici ( ) is one of the 88 constellations designated by the International Astronomical Union (IAU). It is a small northern constellation that was created by Johannes Hevelius in the 17th century. Its name is Latin for 'hunting dogs', and ...

. Its velocity relative to the

cosmic microwave background The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dar ...

is 2,887 ± 13 km/s , which corresponds to a Hubble distance of 42.6 ± 3.0 Mpc (~139 million

light years A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly , which is approximately 9.46 trillion km or 5.88 trillion mi. As defined by the International Astro ...

). It was discovered by American astronomer

James Edward Keeler James Edward Keeler (September 10, 1857 – August 12, 1900) was an American astronomer. He was an early observer of galaxies using photography, as well as the first to show observationally that the rings of Saturn do not rotate as a solid body. ...

in 1899.. IC 4263 is class IV in luminosity and has a broad HI 1 line. With a surface brightness of 14.20 mag / am 2, IC 4263 can be described as a low surface brightness (LSB) galaxy. LSB galaxies are diffuse (D) galaxies with a surface brightness less than one magnitude lower than that of the ambient night sky. To date, six non-redshift measurements give a distance of 40.150 ± 2.601 Mpc (~131 million lightyears), which is within the Hubble distance values.

References

External links

IC 4263
on WikiSky

Website of Prof C. Seligman Barred spiral galaxies Canes Venatici 4263 Astronomical objects discovered in 1899 {{spiral-galaxy-stub