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NGC 523
NGC 523 as seen on SDSS
Observation data (J2000 epoch)
Constellation	Andromeda
Right ascension	01 23.3 00
Declination	+34° 02′ 00″
Redshift	0.0159
Heliocentric radial velocity	4758 +/- 4 km/s
Galactocentric velocity	4904 +/- 7 km/s
Distance	219 million light years away
Apparent magnitude (V)	12.7
Apparent magnitude (B)	13.5
Characteristics
Type	SBc/P
Apparent size (V)	2.5 feet x 42 inches
Other designations
NGC 537, 4ZW 45, Arp 158, CGCG 521-22, IRAS 01225+3345, MCG 6-4-18, PGC 5268, UGC 979, V V 783

NGC 523, also known as NGC 537, 4ZW 45, Arp 158, CGCG 521-22, IRAS 01225+3345, MCG 6-4-18, PGC 5268, UGC 979, and V V 783, is a spiral galaxy located in the constellation Andromeda. It was discovered separately by William Herschel on September 13, 1784, and by Heinrich d'Arrest on August 13, 1862. d'Arrest's discovery was listed as NGC 523, while Herschel's was listed as NGC 537; the two are one and the same. John Dreyer noted in the New General Catalogue that NGC 523 had a double nebula.

See also

• Spiral galaxy
• List of NGC objects (1–1000)
• Andromeda (constellation)

External links

• NGC 523 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SEDS

References

1. ^ Frommert, Hartmut. "NGC 523". spider.seds.org.
2. ^ Rojas, Sebastián García. "Galaxy NGC 523 · Deep Sky Objects Browser". DSO Browser.
3. ^ "Your NED Search Results". ned.ipac.caltech.edu.
4. "New General Catalog Objects: NGC 500 - 549". cseligman.com.

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• Andromeda (constellation)
• Barred spiral galaxies
• NGC objects
• Arp objects
• Discoveries by William Herschel
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