NGC 3904
Elliptical galaxy in the Hydra constellation
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NGC 3904 is an elliptical galaxy in the constellation Hydra.[1] It was observed both by astronomers William Herschel in 1791 and John Herschel in 1834, respectively.[7] The galaxy's radial velocity, relative to the cosmic microwave background is measured at around 1915 ± 25 km/s, corresponding to a Hubble distance of around 28.25 ± 2.02 MPC.[2]
Right ascension11h 49m 13,2s[1][2]
Declination−29° 16′ 36″[2]
| NGC 3904 | |
|---|---|
| |
| Observation data (J2000.0 epoch) | |
| Constellation | Hydra[1] |
| Right ascension | 11h 49m 13,2s[1][2] |
| Declination | −29° 16′ 36″[2] |
| Redshift | 0.005257[3] |
| Heliocentric radial velocity | 1576 ± 8[2] |
| Distance | 72 million LY[3] |
| Apparent magnitude (V) | 10.96[1][4] |
| Characteristics | |
| Type | E2[5] |
| Apparent size (V) | 2.70 x 2.0[6][3] |
| Other designations | |
| PGC 36918 | |
Characteristics
NGC 3904 exhibits no detectable neutral hydrogen or radio emissions, indicating a lack of ongoing star formation. It also hosts a system of globular clusters with relatively lower metallicity and bluer colors than those in bigger elliptical galaxies.[8]
