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Cassiopeia Dwarf

Galaxy in the constellation Cassiopeia

Field	Value
name	Cassiopeia Dwarf
image	Cassiopeia Dwarf (PGC 2807155) Hubble WikiSky.jpg
image_size	250px
caption	Cassiopeia Dwarf by HST/WikiSky
epoch	J2000
type	dSph
ra	{{cite web
title	NASA/IPAC Extragalactic Database
work	Results for Cassiopeia Dwarf
url	http://nedwww.ipac.caltech.edu/
access-date	2006-11-30 }}
dec
dist_ly	2.45 Mly
z	−307 ± 2 km/s
appmag_v	12.9
absmag_v	−13.3 ± 0.3
size_v	2.5 × 2.0
constellation name	Cassiopeia
notes	satellite galaxy of the Andromeda Galaxy
names	Andromeda VII, And VII, Cas dSph, PGC 2807155,
<ref name	"ned" /{{cite simbad
title	NAME Andromeda VII
access-date	2010-03-06 }}

| access-date=2006-11-30 }} Cassiopeia Dwarf Galaxy{{cite simbad | access-date=2010-03-06 }}

The Cassiopeia Dwarf (also known as Andromeda VII) is a dwarf spheroidal galaxy about 2.45 Mly away in the constellation Cassiopeia. The Cassiopeia Dwarf is part of the Local Group and a satellite galaxy of the Andromeda Galaxy (M31). In the sky, it appears behind the Milky Way's galactic plane, and so it is reddened by 0.194 magnitudes. With a luminosity of and a stellar mass of , it is the brightest and most massive of the Andromeda Galaxy's dwarf spheroidal galaxy satellites. It also has the highest metallicity out of all of them.

The Cassiopeia Dwarf was found in 1998, together with the Pegasus Dwarf, by a team of astronomers (Karachentsev and Karachentseva){{Cite journal

References

(2021). "The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. IV. The Star Formation History of Andromeda VII Derived from Long-period Variable Stars". The Astrophysical Journal.

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dwarf-galaxies dwarf-spheroidal-galaxies local-group andromeda-subgroup cassiopeia-(constellation) astronomical-objects-discovered-in-1998

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