NGC 512

NGC 512
NGC 512
	SDSS view of NGC 512
Observation data (J2000 epoch)
Constellation	Andromeda
Right ascension	01h 23m 59.8s
Declination	+33° 23′ 59.8″
Redshift	0.016175 ± 0.000107
Heliocentric radial velocity	(4810 ± 32) km/s
Distance	217 Mly
Apparent magnitude (V)	13.3
Apparent magnitude (B)	14.1
Characteristics
Type	Sab
Apparent size (V)	1.6' × 0.4'
Other designations
	PGC 5132, UGC 944, GC 296, MGC +06-04-013, 2MASS J01235976+3354281, IRAS F01211+3338

NGC 512, also occasionally referred to as PGC 5132 or UGC 944, is a spiral galaxy in the constellation Andromeda.^[2] It is located approximately 217 million light-years from the Solar System^[4] and was discovered on 17 November 1827 by astronomer John Herschel.^[5]

Observation history

Herschel's discovery is based on a single observation. He described the object as "very faint, very small". The position is just 23" from UGC 944, thus the two objects are generally regarded as equivalent.^[6] John Louis Emil Dreyer, creator of the New General Catalogue, added the object to the catalogue, adopting Herschel's description.^[5]

Description

The galaxy has an apparent size of 1.6 × 0.4 arcmins and appears very elongated. It has a recessional velocity of approximately 4810 kilometers per second. The distance of NGC 512 from the Solar System can be estimated using Hubble's law, which puts the object at roughly 220 million light-years from the Sun.^[5]

References

^ ^a ^b ^c ^d "NGC 512". Retrieved 2017-12-09.
^ ^a ^b ^c ^d ^e ^f "Revised NGC Data for NGC 512". spider.seds.org. Retrieved 2017-10-05.
^ ^a ^b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
^ ^a ^b An object's distance from Earth can be determined using Hubble's law: v=H_o is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=H_o
^ ^a ^b ^c ^d "New General Catalog Objects: NGC 500 - 549". cseligman.com. Retrieved 2017-10-16.
^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm".