NGC 561
Galaxy in the constellation Andromeda
NGC 561 is a barred spiral galaxy located in the constellation Andromeda. Its speed relative to the cosmic microwave background is 4,395 ± 20 km/s, which corresponds to a Hubble distance of 64.8 ± 4.6 Mpc (~211 million ly). NGC 561 was discovered by Prussian astronomer Heinrich d'Arrest in 1862.
The luminosity class of NGC 561 is I and it has a broad HI1 line.
NGC 561 is part of the NGC 507 group. This vast group includes at least 42 galaxies, 21 of which appear in the NGC catalog and 5 in the IC catalog. Four members of this group are also Markarian galaxies. The brightest of these galaxies is NGC 507 and the largest is NGC 536.
Sources and credits
This article is adapted from the Wikipedia article “NGC 561”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- NGC561 - SDSS DR14.jpg by Sloan Digital Sky Survey, CC BY 4.0
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