NGC 6791 is an open star cluster in the Lyra constellation. [1] . It was discovered by Friedrich August Theodor Winnecke in 1853. At roughly 8 billion years old, and with an iron to hydrogen abundance ratio that is more than twice that of the Sun, it is one of the oldest and most metal-rich clusters in the Milky Way.

2021年11月18日 · We report results of our analysis of the Kepler superaperture LC data of the open cluster NGC6791 to search for pulsating sdB stars. We checked all pixels and we found only three sdB stars to be pulsating, KIC2569576 (B3), KIC2438324 (B4) and KIC2437937 (B5).

NGC 6791是我们所知最老和最大的 疏散星团 之一，但它为什么会含有如此大量的杂质，则仍然是个悬案。 典型的 疏散星团，通常是由数百颗恒星所组成，而且恒星的年龄少于十亿年。 NGC …

2024年10月25日 · An eight-billion-year-old cluster of stars 13,000 light-years from Earth, called NGC 6791, can be seen in the image. Clusters are families of stars that form together out of the same gas cloud. This particular cluster is called an open cluster, because the stars are loosely bound and have started to spread out from each other.

2012年2月20日 · The evolutionary properties of the old metal-rich Galactic open cluster NGC6791 are assessed, based on deep UB photometry and 2Mass JK data. For 4739 stars in the cluster, bolometric luminosity and effective temperature have been derived from theoretical (U …

2018年10月29日 · NGC 6791 is a unique stellar cluster, key to our understanding of both the multiple stellar population phenomenon and the evolution and assembly of the Galaxy. However, despite many investigations, its nature is still very controversial.

2006年6月1日 · We report on high-resolution echelle spectroscopy of 20 giant stars in the Galactic old open cluster NGC 6791, obtained with Hydra at the WIYN telescope. High-precision radial velocity allows us to isolate 15 bona fide cluster members. From 10 of them we derive a global [M/H] = +0.39 ± 0.05.

Open Cluster NGC 6791 in constellation Lyra. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160] 200 mm aperture: One sees a few moderately bright stars in front of a large, round, faintly luminous area.

NGC 6791 (NGC6791) is a open star cluster that has a distance from Earth of 13,000.00 light years. It can be found in the constellation of Lyra. It was discovered in 1853 by Friedrich August Theodor Winnecke.

Explanation: NGC 6791 is one of the oldest and largest open clusters of stars known. But how did it get so dirty? Open star clusters usually contain a few hundred stars each less than a billion years old. Open star cluster NGC 6791, however, contains thousands of stars recently measured to be about 8 billion years old.