Andromeda IX
Andromeda IX (And 9) is a dwarf spheroidal satellite of the Andromeda Galaxy. It was discovered in 2004 by resolved stellar photometry from the Sloan Digital Sky Survey (SDSS), by Zucker et al. (2004). At the time of its discovery, it was the galaxy with the lowest known surface brightness, Σ"V" ≃ 26.8mags arcsec−2 and the faintest galaxy known from its intrinsic absolute brightness.

It was found from data acquired within an SDSS scan along the major axis of M31, on October 5, 2002. Its distance was estimated to be almost exactly the same as that of M31 by McConnacrchie et al. (2005).
Q654754
dwarf spheroidal
Concept
Q2396702
satellite
UNK
Q2469
Andromeda Galaxy
DIS
Q779522
Andromeda IX
DIS
2004-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2004
DATE
2002-10-05T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
October 5, 2002
DATE
+9^^http://www.w3.org/2001/XMLSchema#decimal
9
NUMBER
+2004^^http://www.w3.org/2001/XMLSchema#decimal
2004
NUMBER
+26.8^^http://www.w3.org/2001/XMLSchema#decimal
26.8
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+31^^http://www.w3.org/2001/XMLSchema#decimal
31
NUMBER
+31^^http://www.w3.org/2001/XMLSchema#decimal
31
NUMBER
+2005^^http://www.w3.org/2001/XMLSchema#decimal
2005
NUMBER
instance of
parent astronomical body
time of discovery or invention