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NGC 7686 is a moderately-sized open cluster in the constellation Andromeda, containing about 80 stars. [2] At magnitude 5.6, it is an easy target for binoculars and small telescopes. [3] According to Johnson et al. (1961), the "color-magnitude diagram shows merely a uniform scatter with no significant tendency to show a cluster main sequence ...
NGC 759 contains 2.4 × 10 9 M☉ of molecular gas. Most of the gas is concentrated in a circumnuclear molecular gas ring with a diameter of 4,200 ly (1.3 kpc). [15] The gas may be the result of the same merger event that produced the circumnuclear molecular gas ring and the main disk. [16] [15] [17]
NGC 317 is a pair of interacting galaxies, consisting of a lenticular galaxy NGC 317A (also designated as PGC 3442) and a spiral galaxy NGC 317B (also designated as PGC 3445), in the constellation Andromeda. It was discovered on October 1, 1885 by Lewis Swift. [2] Two supernovae have been observed in NGC 317B: SN 1999gl (type II, mag. 16.2), [3 ...
NGC 464 is a double star located in the Andromeda constellation. [1] It was discovered in 1882 by Wilhelm Tempel. [2] References External links. Media related to NGC ...
HD 221776 is a double star in the northern constellation of Andromeda. With an apparent visual magnitude of 6.18, [ 2 ] it is viewable by the naked eye user very favourable conditions. The most luminous component has a spectral classification K5III, meaning that it is an orange giant star that has evolved off the main sequence .
The object has an apparent visual magnitude of 8.3 and spans an angular size of 32″ × 28″. [2] Parallax measurements give a distance estimate of 5,730 ± 340 ly (1,757 ± 103 pc). [1] NGC 7662 is a popular planetary nebula for casual observers. A small telescope will reveal a star-like object with slight nebulosity.
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Mayall II is considered to have twice the mass of Omega Centauri, and may contain a central, intermediate-mass (~ 2 × 10 4 M ⊙) black hole. [3] It was first identified as a possible globular cluster by American astronomers Nicholas Mayall and Olin J. Eggen in 1953 using a Palomar 48-inch (1.2 m) Schmidt plate exposed in 1948. [3]