| NGC 4449 | |
|---|---|
.jpg) A Hubble Space Telescope (HST) image of NGC 4449. | |
| Observation data (J2000 epoch) | |
| Constellation | Canes Venatici[1] |
| Right ascension | 12h 28m 11.9s[2] |
| Declination | +44° 05′ 40″[2] |
| Redshift | 207 ± 4 km/s[2] |
| Distance | 13.08 ± 0.98 Mly (4.01 ± 0.30 Mpc)[3] |
| Apparent magnitude (V) | 10.0[2] |
| Characteristics | |
| Type | IBm[2] |
| Apparent size (V) | 6′.2 × 4′.4[2] |
| Other designations | |
| UGC 7592,[2] PGC 40973,[2] Caldwell 21 | |
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NGC 4449, also known as Caldwell 21, is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away.[3] It is part of the M94 Group or Canes Venatici I Group that is relatively close to the Local Group hosting our Milky Way galaxy.[4][5]
- ^ R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 978-0-933346-51-2.
- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4449. Retrieved 13 July 2007.
- ^ a b Sabbi, E.; et al. (2018). "The Resolved Stellar Populations in the LEGUS Galaxies". The Astrophysical Journal Supplement Series. 235 (1): 23. arXiv:1801.05467. Bibcode:2018ApJS..235...23S. doi:10.3847/1538-4365/aaa8e5. S2CID 54968426.
- ^ Karachentsev, I. D. (2005). "The Local Group and Other Neighboring Galaxy Groups". The Astronomical Journal. 129 (1): 178–188. arXiv:astro-ph/0410065. Bibcode:2005AJ....129..178K. doi:10.1086/426368. ISSN 1538-3881. S2CID 119385141.
- ^ "Nearby Groups of Galaxies". ned.ipac.caltech.edu. Retrieved 3 March 2018.