Andromeda X

Andromeda X
Andromeda X
Observation data (J2000 epoch)
Constellation	Andromeda
Right ascension	01h 06m 33.9s
Declination	+44° 48′ 16″
Apparent magnitude (V)	16.1
Absolute magnitude (V)	-8.1
Characteristics
Type	dSph
Apparent size (V)	7 arcmin
Notable features	satellite galaxy of the Andromeda Galaxy
Other designations
	And X, PGC 5056921

Andromeda X (And 10) is a dwarf spheroidal galaxy about 2.9 million light-years away from the Sun in the constellation Andromeda.^[1] Discovered in 2005 by Zucker et al., And X is a satellite galaxy of the Andromeda Galaxy (M31). Aided by the application of stellar photometry to data from the Sloan Digital Sky Survey similar to the Andromeda IX discovery, the new finding indicates that this type of extremely faint satellite might be common in the Local Group, potentially providing further support for hierarchical cold dark matter models.^[2]

References

^ "Andromeda X". spider.seds.org. Retrieved 2022-04-06.
^ Zucker, Daniel B.; Kniazev, Alexei Y.; Martinez-Delgado, David; Bell, Eric F.; Rix, Hans-Walter; Grebel, Eva K.; Holtzman, Jon A.; Walterbos, Rene A. M.; Rockosi, Constance M.; York, Donald G.; Barentine, J. C. (2006-01-26). "Andromeda X, A New Dwarf Spheroidal Satellite of M31: Photometry". The Astrophysical Journal. 659: L21–L24. arXiv:astro-ph/0601599. doi:10.1086/516748. S2CID 1064929.

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v t e Andromeda Galaxy
Location	Andromeda Galaxy → Andromeda subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → Local Hole → Observable universe → Universe Each → may be read as "within" or "part of".	Andromeda Galaxy
Satellite galaxies	M32 M110 NGC 185 NGC 147 Andromeda I Andromeda II Andromeda III Andromeda IV* Andromeda V Andromeda VI Andromeda VII Andromeda VIII Andromeda IX Andromeda X Andromeda XI Andromeda XII Andromeda XIII Andromeda XIV Andromeda XV Andromeda XVI Andromeda XVII Andromeda XVIII Andromeda XIX Andromeda XX Andromeda XXI Andromeda XXII Andromeda XXIII Andromeda XXIV Andromeda XXV Andromeda XXVI Andromeda XXVII Andromeda XXVIII Andromeda XXIX Triangulum subgroup* *It is uncertain whether these are companion galaxies of the Andromeda Galaxy
Catalogued stars	AE Andromedae AF Andromedae M31-RV
Other	Andromeda–Milky Way collision S Andromedae Mayall II M32p NGC 206 3XMM J004232.1+411314
Category