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- Segue_2 abstract "Segue 2 is a dwarf spheroidal galaxy situated in the Aries constellation and discovered in 2007 in the data obtained by Sloan Digital Sky Survey. The galaxy is located at the distance of about 35 kpc (35,000 parsecs (110,000 ly)) from the Sun and moves towards the Sun with the speed of 40 km/s. It is classified as a dwarf spheroidal galaxy (dSph) meaning that it has an approximately round shape with the half-light radius of about 34 pc.Segue 2 is one of the smallest and faintest satellites of the Milky Way—its integrated luminosity is about 800 times that of the Sun (absolute visible magnitude of about −2.5), which is much lower than the luminosity of the majority of globular clusters. However, the mass of the galaxy—about 550,000 solar masses—is substantial, corresponding to the mass to light ratio of about 650.The stellar population of Segue 2 consists mainly of old stars formed more than 12 billion years ago. The metallicity of these old stars is also very low at [Fe/H] < −2, which means that they contain at least 100 times less heavy elements than the Sun. The stars of Segue 2 were probably among the first stars to form in the Universe. Currently, there is no star formation in Segue 2.Segue 2 is located near the edge of Sagittarius Stream and at the same distance. It may once have been a satellite of Sagittarius Dwarf Elliptical Galaxy or its star cluster.In June 2013 the The Astrophysical Journal reported that Segue 2 was bound together with dark matter.".
- Segue_2 type Dwarf_spheroidal_galaxy.
- Segue_2 wikiPageID "26375029".
- Segue_2 wikiPageRevisionID "600639565".
- Segue_2 appmagV "15.2".
- Segue_2 constellationName Aries_(constellation).
- Segue_2 distLy "114.0".
- Segue_2 epoch Epoch_(astronomy).
- Segue_2 massLightRatio "650".
- Segue_2 name "Segue 2 Dwarf Galaxy".
- Segue_2 names "Segue 2".
- Segue_2 sizeV "6.8".
- Segue_2 title List_of_galaxies.
- Segue_2 type Dwarf_spheroidal_galaxy.
- Segue_2 years "150000".
- Segue_2 years "2013".
- Segue_2 subject Category:Aries_(constellation).
- Segue_2 subject Category:Dwarf_spheroidal_galaxies.
- Segue_2 subject Category:Local_Group.
- Segue_2 subject Category:Milky_Way_Subgroup.
- Segue_2 subject Category:Objects_within_1_Mly_of_Earth.
- Segue_2 type CelestialBody.
- Segue_2 type Galaxy.
- Segue_2 type PhysicalBody.
- Segue_2 comment "Segue 2 is a dwarf spheroidal galaxy situated in the Aries constellation and discovered in 2007 in the data obtained by Sloan Digital Sky Survey. The galaxy is located at the distance of about 35 kpc (35,000 parsecs (110,000 ly)) from the Sun and moves towards the Sun with the speed of 40 km/s.".
- Segue_2 label "Segue 2".
- Segue_2 label "Segue 2".
- Segue_2 label "Segue 2".
- Segue_2 label "Segue 2".
- Segue_2 sameAs Segue_2.
- Segue_2 sameAs Segue_2.
- Segue_2 sameAs m.0bby549.
- Segue_2 sameAs Q2266221.
- Segue_2 sameAs Q2266221.
- Segue_2 wasDerivedFrom Segue_2?oldid=600639565.
- Segue_2 isPrimaryTopicOf Segue_2.
- Segue_2 name "Segue 2 Dwarf Galaxy".
- Segue_2 name "Segue 2".