Segue 3 is a faint star cluster of the Milky Way galaxy discovered in 2010 in the data obtained by Sloan Digital Sky Survey. [1] It is located in the Pegasus constellation at the distance of about 17 kpc from the Sun and moves away from it with the velocity of 167.1 ± 1.5 km/s .

2011年7月15日 · We investigate the kinematic and photometric properties of the Segue 3 Milky Way companion using Keck/DEIMOS spectroscopy and Magellan/IMACS g and r-band imaging. Using maximum likelihood methods to analyze the photometry, we study the structure and stellar population of Segue 3.

2013年6月13日 · In this paper, we present deep photometry of Segue 3, that helped to better constrain its age, metallicity, reddening and distance. These results can help understanding if these faint globular clusters were formed early in the Galaxy, or if accreted from a dwarf galaxy, or else if formed in a gas stream during the passage of dwarf galaxy.

Abstract: Deep Galileo (Telescopio Nazionale Galileo) B, V and I images of Segue 3, reaching V ∼ 25, reveal that it is the youngest globular cluster known so far in the Galaxy. A young age of 3.2 Gyr is found, differently from a previous estimate of 12 Gyr.

Deep Galileo (Telescopio Nazionale Galileo) B, V and I images of Segue 3, reaching V ∼ 25, reveal that it is the youngest globular cluster known so far in the Galaxy. A young age of 3.2 Gyr is found, differently from a previous estimate of 12 Gyr.

Segue 3 shares the characteristics of unusual stellar systems that have likely been stripped from external dwarf galaxies as they are being accreted by the Milky Way, or that have been formed during such an event. Its youth, metallicity, and location are all inconsistent with Segue 3 being a cluster native to the Milky Way.

Segue 3是2010年在斯隆数字天空调查获得的数据中发现的银河系银河系的微弱明星群。 它位于距离太阳约17 kpc的飞马星座中，并以167.1±1.5 km/s的速度移开。

I was looking for interesting objects and came across some unusual in the UNGC catalog (Updated Nearby Galaxy Catalog) and came across Segue 3, an odd little object of (initially) uncertain type in Pegasus.

We investigate the kinematic and photometric properties of the Segue 3 Milky Way companion using Keck/ DEIMOS spectroscopy and Magellan/IMACS g- and r-band imaging. Using maximum likelihood methods to analyze the photometry, we study the structure and stellar population of Segue 3. We find that the half-light radius

2017年6月6日 · Segue 3 shares the characteristics of unusual stellar systems which have likely been stripped from external dwarf galaxies as they are being accreted by the Milky Way, or that have been formed during such an event. Its youth, metallicity, and location are all inconsistent with Segue 3 being a cluster native to the Milky Way.