Globular Cluster NGC 5897

NGC 5897
NGC 5897: Section of PanSTARRS/DR1 Color [147]

History

This globular cluster was discovered on 10 March 1785 by the famous German-British astronomer William Herschel using his selfmade reflecting telescope of 20 foot focal length (aperture 18.7 inch) in Slough near Windsor in Great Britain. He classified it as cataloged it as VI 19 (class VI = very compressed and rich clusters of stars) and noted: «A beautiful larg cluster of the most minute and most compressed stars of different sizes. 6 or 7' diameter, irregular round, faint, red colour». [463] His son John cataloged it as h 3596, GC 4075 and Dreyer added it in 1888 as NGC 5897.

Physical Properties

NGC 5897 is a metal-poor globular cluster in the Galactic halo. In astronomy everything heavier than Helium is a «metal». It is located at a moderate distance from the Sun 12.5 kpc and 7 kpc away from the galactic center. NGC 5897 is known to harbor several variable stars, mainly of type RR Lyrae. [527]

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
DesignationNGC 5897
TypeGCL (XI)
Right Ascension15h 17m 24.5s
Declination-21° 00' 35"
Diameter11 arcmin
Visual magnitude8.4 mag
Metric Distance12.500 kpc
Dreyer Descriptionglobular, pF, L, viR, vgbM, rrr
Identification, RemarksGCL 33, ESO 582-SC2

Finder Chart

The globular cluster NGC 5897 is located in constellation Libra. The best time to observe it is from March to June.

Chart Globular Cluster NGC 5897
Globular Cluster NGC 5897 in constellation Libra. Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

More Objects Nearby (±20°)

References

147Aladin Lite; aladin.u-strasbg.fr/AladinLite (2020-12-23)
149SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
160The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
463«Catalogue of one thousand new nebulae and clusters of stars» William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1786; DOI:10.1098/rstl.1786.0027
527«The chemical composition of a regular halo globular cluster: NGC 5897» Andreas Koch and Andrew McWilliam; A&A Volume 565, May 2014; DOI:10.1051/0004-6361/201323119