NGC 888
NGC 888 imaged by Legacy Surveys
Observation data (J2000 epoch)
Constellation	Horologium
Right ascension	02h 17m 27.1s[1]
Declination	−59° 51′ 40″[1]
Redshift	0.029190±0.000133[1]
Heliocentric radial velocity	8,751±40 km/s[1]
Galactocentric velocity	8662±40 km/s[1]
Distance	416.7 ± 29.2 Mly (127.76 ± 8.96 Mpc)[1]
Apparent magnitude (V)	13.0[2]
Apparent magnitude (B)	14.0[2]
Surface brightness	12.52[2]
Characteristics
Type	E1? pec[1] · [2] E/S0?[3] E[4]
Apparent size (V)	0.8′ × 0.8′[2]
Notable features	Flat-spectrum radio source[1]
Other designations
PGC 8743 ESO 115-2 AM 0215-600[2]

NGC 888 is a large and relatively distant elliptical galaxy in the constellation Horologium. Its velocity relative to the cosmic microwave background is 8662±40 km/s, corresponding to a Hubble distance of 127.8±9.0 Mpc.^[1] It was discovered by British astronomer John Herschel in 1834.^[3]

Characteristics

A redshift-independent distance measurement gives 136.0 Mpc,^[5] which is consistent within uncertainties with the Hubble distance.

NGC 888 is classified as a flat-spectrum radio galaxy.^[1]

Galaxy pair

NGC 888 and ESO 115-003 form a galaxy pair.^[6] The Hubble distance of ESO 115-003 is 134.65±9.45 Mpc.^[7] Considering the uncertainties in the distances, it is possible that the two galaxies form a physical pair.

Supernova

One supernova has been observed in NGC 888:

• SN 2016frs (Type Ia, mag. 16.1) was discovered by MASTER on 23 August 2016.^[8][9]

References

External links

• NGC 888 sur spider.seds.org
• NGC 888 sur la base de données LEDA
• NGC 888 sur WikiSky
• NGC 888 sur le site du professeur C. Seligman