NGC 5466 is a class XII globular cluster in the constellation Boötes. Located 51,800 light years from Earth and 52,800 light years from the Galactic Center, it was discovered by William Herschel on May 17, 1784, as H VI.9. This globular cluster is unusual insofar as it contains a certain blue horizontal branch of stars, as well as being unusually metal poor like ordinary globular clusters. It is thought to be the source of a stellar stream discovered in 2006, called the 45 Degree Tidal Stream. This star stream is an approximately 1.4° wide star lane extending from Boötes to Ursa Major.

NGC 5466
NGC 5466 by Hubble Space Telescope; 3.5′ view
Observation data (J2000 epoch)
Class	XII[1]
Constellation	Boötes
Right ascension	14h 05m 27.29s[2]
Declination	+28° 32′ 04.0″[2]
Distance	51.9 kly (15.9 kpc)[3]
Apparent magnitude (V)	10.5
Apparent dimensions (V)	11
Physical characteristics
Mass	1.79×105[4] M☉
VHB	16.47
Metallicity	${\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}$ = –2.20[5] dex
Estimated age	13.57 Gyr[5]
Other designations	C 1403+287, GCl 27, GC 3776, h 1746, H 6.
See also: Globular cluster, List of globular clusters

See also

• List of stellar streams

References

Further reading

• BROSCHE P.; GEFFERT M. (1983). "Membership of above horizontal branch stars in the globular cluster NGC 5466". Astronomy & Astrophysics. 127: 415–416. Bibcode:1983A&A...127..415B.^{[permanent dead link]}
• BUONANNO R.; BUSCEMA G.; CORSI C.E.; IANNICOLA G.; et al. (1984). "Positions, magnitudes and colors for stars in the globular cluster NGC 5466". Astronomy & Astrophysics. 56: 79–86. Bibcode:1984A&AS...56...79B.^{[permanent dead link]}
• ZINN R.; KING R. (1982). "The mass of the anomalous Cepheid in the globular cluster NGC 5466". The Astrophysical Journal. 262: 700–708. Bibcode:1982ApJ...262..700Z. doi:10.1086/160462.^{[permanent dead link]}
• MONTGOMERY K.A.; HEASLEY J.N.; JANES K.A. (1994). "Photometry of globular cluster NGC 5466". Bull. Am. Astron. Soc. 26: 1490. Bibcode:1994AAS...18510410M.^{[permanent dead link]}
• PRYOR C.; McCLURE R.D.; FLETCHER J.M.; HESSER J.E. (1991). "Mass-light ratios for globular clusters. II. The low-concentration clusters NGC 288, NGC 5466, and M 55 (NGC 6809)". The Astrophysical Journal. 102: 1026–1042. Bibcode:1991AJ....102.1026P. doi:10.1086/115929.^{[permanent dead link]}
• BUONANNO R.; CORSI C.E.; FUSI PECCI F. (1985). "The giant, asymptotic and horizontal branches of globular clusters. II. Photographic of the metal-poor clusters M 15, M 92 and NGC 5466". Astronomy & Astrophysics. 145: 97–117. Bibcode:1985A&A...145...97B.^{[permanent dead link]}
• MATEO M.; HARRIS H.C.; NEMEC J.; OLSZEWSKI E.W. (1990). "Blue stragglers as remnants of stellar mergers: the discovery of short-period eclipsing binaries in globular cluster NGC 5466". The Astrophysical Journal. 100: 469–484. Bibcode:1990AJ....100..469M. doi:10.1086/115530.^{[permanent dead link]}
• BELOKUROV V.; EVANS N.W.; IRWIN M.J.; HEWETT P.C.; et al. (2006). "The discovery of tidal tails around the globular cluster NGC 5466". The Astrophysical Journal. 637 (1): L29–L32. arXiv:astro-ph/0511767. Bibcode:2006ApJ...637L..29B. doi:10.1086/500362.
• FERRO A.A.; LOPEZ V.R.; GIRIDHAR S.; BRAMICH D.M. (2008). "CCD photometry of the globular cluster NGC 5466. RR Lyrae light-curve decomposition and the distance scale". Mon. Not. R. Astron. Soc. 384 (4): 1444–1458. arXiv:0711.4027. Bibcode:2008MNRAS.384.1444A. doi:10.1111/j.1365-2966.2007.12760.x.
• McCARTHY J.K.; NEMEC J.M. (1997). "The chemical composition and period change rate of the anomalous cepheid V19 in NGC 5466". The Astrophysical Journal. 482 (1): 203–229. Bibcode:1997ApJ...482..203M. doi:10.1086/304118.
• LEHMANN I.; SCHOLZ R.-D. (1997). "Tidal radii of the globular clusters M 5, M 12, M 13, M 15, M 53, NGC 5053 and NGC 5466 from automated star counts". Astronomy & Astrophysics. 320: 776–782. Bibcode:1997A&A...320..776L.^{[permanent dead link]}
• CORWIN T.M.; CARNEY B.W.; NIFONG B.G. (1999). "BV photometry of RR Lyrae variables in the globular cluster NGC 5466". The Astrophysical Journal. 118 (6): 2875–2887. Bibcode:1999AJ....118.2875C. doi:10.1086/301132.
• PEIKOV Z.I. (2002). "Logartithmic density range and the percentage of stars in the cores of various subsystems of the globular clusters M 56, M 12, NGC 6535, NGC 6171, NGC 5466, and M 92". Astronomy Reports. 46 (5): 352–359. Bibcode:2002ARep...46..352P. doi:10.1134/1.1479422.^{[permanent dead link]}
• JEON Y.-B.; LEE M.G.; KIM S.-L.; LEE H. (2004). "SX Phoenicis stars in the globular cluster NGC 5466". The Astronomical Journal. 128 (1): 287–299. arXiv:astro-ph/0404069. Bibcode:2004AJ....128..287J. doi:10.1086/421735.
• ROJAS LOPEZ V.; ARELLANO FERRO A.; GIRIDHAR S.; BRAMICH D.M. (2006). "Physical parameters of RR Lyrae stars in the globular cluster NGC 5466: The Oosterhoff dichotomy". Rev. Mex. Astron. Astrofís. Ser. Conf. 26: 49. Bibcode:2006RMxAC..26...49R.^{[permanent dead link]}
• GRILLMAIR C.J.; JOHNSON R. (2006). "The detection of a 45° tidal stream associated with the globular cluster NGC 5466". The Astrophysical Journal. 639 (1): L17–L20. arXiv:astro-ph/0602602. Bibcode:2006ApJ...639L..17G. doi:10.1086/501439.
• Fekadu, Nassissie; Sandquist, Eric L.; Bolte, Michael (2007). "Photometry of the Globular Cluster NGC 5466: Red Giants and Blue Stragglers". The Astrophysical Journal. 663 (1): 277–295. arXiv:astro-ph/0602602. Bibcode:2007ApJ...663..277F. doi:10.1086/518637.

External links

Wikimedia Commons has media related to NGC 5466.

• NGC 5466 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SIMBAD, NGC 5466 data
• VizieR, NGC 5466
• SEDS, NGC 5466
• Aladin, Image NGC 5466

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