Not to be confused with Sagittarius Dwarf Irregular Galaxy.
Sagittarius Dwarf Spheroidal Galaxy[1]
The Sagittarius Dwarf Spheroidal Galaxy in Aitoff allsky view
Observation data (J2000 epoch)
Constellation
Sagittarius
Right ascension
18h 55m 19.5s[2]
Declination
−30° 32′ 43″[2]
Redshift
140 ± ? km/s[2]
Distance
65 ± 7 kly (20 ± 2 kpc)[3][4]
Apparent magnitude (V)
4.5[2]
Characteristics
Type
dSph(t)[2]
Mass
4×108[5]M☉
Apparent size (V)
450.0′ × 216.0′[2]
Notable features
Heading for a collision with the Milky Way
Other designations
Sag DEG,[6] Sgr dSph,[2] Sagittarius Dwarf Spheroidal,[2] Sgr I Dwarf,[2] PGC 4689212[7]
The Sagittarius Dwarf Spheroidal Galaxy (Sgr dSph), also known as the Sagittarius Dwarf Elliptical Galaxy (Sgr dE or Sag DEG), is an elliptical loop-shaped satellite galaxy of the Milky Way. It contains four globular clusters in its main body,[8] with the brightest of them—NGC 6715 (M54)—being known well before the discovery of the galaxy itself in 1994. Sgr dSph is roughly 10,000 light-years in diameter, and is currently about 70,000 light-years from Earth, travelling in a polar orbit (an orbit passing over the Milky Way's galactic poles) at a distance of about 50,000 light-years from the core of the Milky Way (about one third of the distance of the Large Magellanic Cloud). In its looping, spiraling path, it has passed through the plane of the Milky Way several times in the past.[9] In 2018 the Gaia project of the European Space Agency showed that Sgr dSph had caused perturbations in a set of stars near the Milky Way's core, causing unexpected rippling movements of the stars triggered when it moved past the Milky Way between 300 and 900 million years ago.[10]
^"Name SDG". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 November 2006.
^Karachentsev, I. D.; Karachentseva, V. E.; Hutchmeier, W. K.; Makarov, D. I. (2004). "A Catalog of Neighboring Galaxies". The Astronomical Journal. 127 (4): 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
^Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6. S2CID 120973010.
^Cite error: The named reference Verbetsky2020 was invoked but never defined (see the help page).
^Sagittarius Dwarf Elliptical Galaxy / Sag DEG
^eSky:Sagittarius Dwarf Galaxy
^Cite error: The named reference Minniti was invoked but never defined (see the help page).
^"Star-Crossed: Milky Way's spiral shape may result from a smaller galaxy's impact". Scientific American. 15 December 2016. Archived from the original on 15 December 2016.
^Antoja, T.; Helmi, A.; Romero-Gómez, M.; Katz, D.; Babusiaux, C.; Drimmel, R.; Evans, D. W.; Figueras, F.; Poggio, E.; Reylé, C.; Robin, A. C.; Seabroke, G.; Soubiran, C. (19 September 2018). "A dynamically young and perturbed Milky Way disk". Nature. 561 (7723): 360–362. arXiv:1804.10196. Bibcode:2018Natur.561..360A. doi:10.1038/s41586-018-0510-7. PMID 30232428. S2CID 52298687.
and 27 Related for: Sagittarius Dwarf Spheroidal Galaxy information
The SagittariusDwarfSpheroidalGalaxy (Sgr dSph), also known as the SagittariusDwarf Elliptical Galaxy (Sgr dE or Sag DEG), is an elliptical loop-shaped...
and surface brightnesses. Dwarfspheroidalgalaxies have a large range of luminosities, and known dwarfspheroidalgalaxies span several orders of magnitude...
SagittariusDwarfGalaxy may refer to: The SagittariusDwarfSpheroidalGalaxy (also known as the SagittariusDwarf Elliptical Galaxy), a satellite galaxy...
Sagittarius. (SagDIG should not be confused with the SagittariusDwarfSpheroidalGalaxy, SagDEG, a satellite galaxy of the Milky Way discovered decades later in...
eponymous starship. Messier 79 Galaxy formation and evolution Stellar kinematics Milky Way SagittariusDwarfSpheroidalGalaxy Monoceros Ring Virgo Stellar...
acquired from small galaxies which fall into and merge with the spiral galaxy—for example, the SagittariusDwarfSpheroidalGalaxy is in the process of...
SagittariusDwarfSpheroidalGalaxy is not listed, because it is not discernible as being a separate galaxy in the sky. This is a list of galaxies that...
additional ultra-faint dwarfspheroidalgalaxies. The Milky Way's satellite galaxies system comprises the SagittariusDwarfGalaxy, Large Magellanic Cloud...
quantities of gas. The Milky Way's satellite galaxies include the following: The SagittariusDwarfSpheroidalGalaxy is currently in the process of being consumed...
Overdensity Fimbulthul stream Mayall II Messier 54 NGC 5286 SagittariusDwarfSpheroidalGalaxy List of largest known star clusters Shapley, Harlow; Sawyer...
Galactic Globular Clusters: M54 and Young Populations in the SagittariusDwarfSpheroidalGalaxy". Astrophysical Journal Letters. 667 (1): L57–L60. arXiv:0708...
The Fornax DwarfSpheroidal (formerly known as the Fornax System) is an elliptical dwarfgalaxy in the constellation Fornax that was discovered in 1938...
Distances to Nearby Galaxies in Sculptor Sharina, M. E; Shimansky, V. V; Kniazev, A. Y (2017). "Nuclei of dwarfspheroidalgalaxies KKs 3 and ESO 269−66...
galactic poles. It consists of tidally stripped stars from the SagittariusDwarf Elliptical Galaxy, resulting from the process of merging with the Milky Way...
the secondary satellite can dive into the primary galaxy, as in the SagittariusDwarf Elliptical Galaxy diving into the Milky Way. That can possibly trigger...
Some even originated from a different galaxy, such as Palomar 12 from the SagittariusDwarfSpheroidalGalaxy, which is now known as a satellite of the...
Motion of Palomar 12: A Case for Tidal Capture from the SagittariusDwarfSpheroidalGalaxy". The Astronomical Journal. 120 (4): 1892–1905. arXiv:astro-ph/0006314...
many dwarf galaxies. These dwarfgalaxies are classified as either irregular or dwarf elliptical/dwarfspheroidalgalaxies. A study of 27 Milky Way neighbors...
the dwarfgalaxies orbiting the Milky Way are Canis Major Dwarf (the closest), SagittariusDwarf Elliptical Galaxy, Ursa Minor Dwarf, Sculptor Dwarf, Sextans...
"Satellite accretion in action: a tidally disrupting dwarfspheroidal around the nearby spiral galaxy NGC 253". Monthly Notices of the Royal Astronomical...
globular cluster that is believed to have originated in the SagittariusDwarfSpheroidalGalaxy (Sag DEG) and is physically associated with it. It is relatively...
) However, much finer units are needed to measure the angular sizes of galaxies, nebulae, or other objects of the night sky. Degrees, therefore, are subdivided...
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