|
NGC 5824
NGC 5834, ESO387-SC001, GCL-31
RA 15:03:57
Dec -33°04.7'
Globular
cluster |
The 9th mag globular cluster was discovered by
E. E. Barnard using a 6-inch refractor at Nashville, Tennessee and described as
a nebula with a stellar nucleus.
In September 1883 W.H. Finlay used the
6-inch refractor at the Royal Observatory, Cape of Good Hope, to observe the
cluster which he described as a "bright small nebula".
Houston writes that this globular "is
about 6' across and at 9th mag is easy to find. Surprisingly, it was discovered
by E E Barnard in a region well combed previously by the Herschels and others.
The core of NGC 5824 is almost stellar in appearance."
Tom Lorenzin: “9.5M; 3' diameter; small,
unresolved glow with very highly compressed central region; overall brightness
fairly high; 25' SSE of bright star 5.5M SAO 206239.”
The globular, which measures 6.2', has a
concentration rating of 1, which means it exhibits the highest degree of
concentration. Van den Bergh and Hagen ("UBV photometry of star clusters in
the Magellanic Clouds", Astronomical Journal, Vol. 73, 1968) find that the
integrated V magnitude through a 60'' diaphragm is 9.47. Through a 30''
diaphragm V = 9.80.
RA 15 03 58.5 (2000) Dec -33 04 04
Integrated V magnitude 9.09 Central surface brightness, V magnitudes per square
arcsecond 15.08 Integrated spectral type F4 Central concentration, c =
log(r_total/r_core); a 'c' denotes a core-collapsed cluster 2.45 Core radius in
arcmin .05. [“Catalog Of Parameters For Milky Way Globular Clusters”,
compiled by William E. Harris, McMaster University. (Revised: May 15, 1997; from
http://www.physics.mcmaster.ca/Globular.html; Harris, W.E. 1996, AJ, 112, 1487)
] |
