| NGC 6744 | |
|---|---|
 Wide Field Imager view of a Milky Way look-alike NGC 6744 | |
| Observation data (J2000epoch) | |
| Constellation | Pavo |
| Right ascension | 19h 09m 46.1785s[1] |
| Declination | −63° 51′ 26.992″[1] |
| Redshift | 0.002805[1] |
| Heliocentric radial velocity | 841 ± 2km/s[1] |
| Distance | 23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc)[2] |
| Group orcluster | Virgo Supercluster |
| Apparent magnitude (V) | 9.14[1] |
| Characteristics | |
| Type | SAB(r)bc[1] |
| Size | ~171,800 ly (52.68 kpc) (estimated)[1] |
| Apparent size (V) | 20.0′ × 12.9′[1] |
| Other designations | |
| Caldwell 101, ESO 104- G 042,IRAS 19051-6357,PGC 62836[1] | |
NGC 6744 (also known asCaldwell 101 or thePavo Galaxy[3]) is anintermediate spiral galaxy in theconstellationPavo (Peacock). Its velocity with respect to thecosmic microwave background is 802 ± 3 km/s, which corresponds to aHubble distance of 38.6 ± 2.7 Mly (11.82 ± 0.83 Mpc).[1] However, 21non redshift measurements give a distance of 23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc).[2] It was discovered on 30 June 1826 by Scottish astronomerJames Dunlop, observing fromParramatta, Australia.[4]
One of the largest spiral galaxies in the local universe, NGC 6744 is considered aMilky Way mimic in the immediate vicinity, displaying remarkable star formation, flocculent (fluffy) arms, and an elongated core.[5][6] It has at least one distorted companion galaxy(NGC 6744A) superficially similar to one of theMagellanic Clouds.[7]
NGC 6744 is aLINER galaxy, i.e., its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[6] The galaxy has anactive galactic nucleus (AGN) of low luminosity.[6]
NGC 6744 lies within theVirgo Supercluster.[8][9]
Twosupernovae have been observed in NGC 6744:
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