NGC 1169
Intermediate barred spiral galaxy in the constellation Perseus
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NGC 1169 (UGC 2503) is an intermediate barred spiral galaxy in the constellation of Perseus. NGC 1169 has a reddish center, indicating the region is dominated by older stars. In contrast, the outer ring contains larger blue-white stars, a sign of recent star formation.[1][5] The entire galaxy is rotating at approximately 265 km/s.[4]
| NGC 1169 | |
|---|---|
Image of NGC 1169 taken by Adam Block | |
| Observation data (J2000 epoch) | |
| Constellation | Perseus[1] |
| Right ascension | 03h 03m 34.756s [2] |
| Declination | +46° 23′ 10.74″ [2] |
| Redshift | 0.007962 ± 0.000017 [3] |
| Heliocentric radial velocity | 2387 ± 5 km/s [3] |
| Galactocentric velocity | 2508 ± 5 km/s [3] |
| Distance | 35.1 ± 8.4 kpc (114 ± 27 kly)h−1 0.73 [3] |
| Apparent magnitude (V) | 9.02 [3] |
| Apparent magnitude (B) | 13.2 [2] |
| Absolute magnitude (V) | -23.6 [3] |
| Characteristics | |
| Type | SAB(r)b [3] |
| Mass | 4.5×1011 [4] M☉ |
| Mass/Light ratio | 10 [4] M☉/L☉ |
| Size | 120,000 × 84,000 ly [3] |
| Apparent size (V) | 4.2 × 2.8 arcmin [3] |
| Other designations | |
| NGC 1169, UGC 2503, PGC 11521 | |
NGC 1169 was discovered on December 11, 1786 by William Herschel.[6] Measurements of its distance range from 20.9 Mpc - 49.7 Mpc with an average of 35.1 Mpc.[3]
